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I V I A I M L J A L

Serial Number

Tektronix, Inc.

S.W. Millikan Way • P. O. Box 500 • Beaverton, Ore r 97005 • Ph?"? m i-ju i t coma; icuranit

Type 516

WARRANTY

A ll Tektronix instruments are w arranted against defective materials and w o rkm an­ ship fo r one year. Tektronix transformers, manufactured in our own plant, are w a r­ ranted for the life of the instrument.

Any questions w ith respect to the w a r­ ranty mentioned above should be taken up w ith your Tektronix Field Engineer.

Tektronix repair and replacem ent-part service is geared directly to the field, there­ fore a ll requests fo r repairs and replace­ ment parts should be directed to the Tek­ tronix Field O ffice or Representative in your area. This procedure w ill assure you the fastest possible service. Please include the instrument Type and Serial number with all requests for parts or service.

Specifications and price change p riv ­ ileges reserved.

C opyright 1960, new m aterial copy­ right 1969 by Tektronix, Inc., Beaverton,

Oregon. Printed in the United States o f

America. A ll rights reserved. Contents of this publication may not be reproduced in any form w ithout permission of the copy­ right owner.

CONTENTS

Section 1

Section 2

Section 3

Section 4

Specifications

Preliminary Inform ation

O perating Instructions

Circuit Description

M aintenance

C alibration

Section 5

Section 6

Section 7 Mechanical Parts List

Abbreviations and Symbols

Parts O rdering Inform ation

Section 8 Electrical Parts List

Diagrams

Abbreviations and symbols used in this manual are based on, or taken directly from IEEE Standard 260 "S tand ard Sym­ bols fo r U n its", MIL-STD-12B and other standards o f the electronics industry.

Change in form ation, if any, is located at the rear o f this m anual.

Type 516 §

S E C T I O N 1

/

7 ^ ' 7 7 L

S P E C I F I C A T I O N S

Introduction

The Tektronix Type 516 Oscilloscope is a dual-trace gen­ eral purpose laboratory oscilloscope w ith a bandpass of dc to 15 megahertz. Dual-trace operation is provided by tw o identical vertical input channels; signals may be applied to either o r both input channels at the same time. Switch­ ing between the two channels takes place at the end of each sweep of the beam or at a free-running rate of approxi­ mately 150 kHz. Either channel may be used separately to provide single-trace operation when desired.

Vertical Deflection System, Both Channels

Bandpass . . . DC to 15 MHz (response not more than 3 dB down within these limits).

Risetime. . . 23 nanoseconds or less.

Sensitivity. .0.05 v o lt/d iv . to 20 volts/div. in 9 calibrated steps; accuracy with 3% . Continuously variable from

0.05 v o lt/d iv . to at least 50 volts/div., uncalibrated.

Input Im pedance... 1 megohm paralleled by 20 picofarads.

O perating Modes . . . Channel A only, Channel B only, electronic switching at approximately 150 kHz (chopped), or electronic switching on alternate sweeps.

Maximum Voltage I n p u t . . . 600 volts, combined dc- and acvoltage.

Triggering

Type. . .Am plitude-level selection with preset or manual sta­ b ility control.

M odes. . . Automatic, ac-coupled, dc-coupled, and high- frequency synchronized.

Source. .. Internal from vertical signal, external from trigger­ ing signal, or line frequency.

S lo p e ... Plus (rising slope of triggering waveform), or minus

(falling slope of triggering waveform).

Signal Requirements . . . Internal-AC: 2 mm of display at

1 kHz increasing to 5 mm at 2 MHz. Low frequency re­ sponse is 3 d B down at approximately 16 Hz. AUTO: 5 mm of display from 50 Hz to 1 kHz increasing to 1 cm at

2 MHz. DC: 5 mm o f display from DC to 1 kHz increas­ ing to 2 cm at 2 MHz. AC LF REJECT: Attenuates fre­ quencies below 16 kHz. HF SYNC: 2 cm of display at

20 MHz. External-AC: 0.5 V at 1 kHz increasing to 1.5 V a t 2 MHz. Low frequency response is 3 dB down at ap­ proxim ately 16 Hz. AUTO: 1 V from 50 Hz to 1 kHz in­ creasing to 3 V at 2 MHz. DC: 0.5 V from DC to 1 kHz

© increasing to 1.5 V at 2 MHz. AC LF REJECT: Attenuates frequencies below 16 kHz. HF SYNC: 2 V at 20 MHz.

Line-AC LF REJECT: Attenuates frequencies between 16 kHz.

Sweep

T y p e .. .M iller Integrator.

Sweep Rates. . .0.2 jusec/div. to 2sec/div. in 22 calibrated steps. Accuracy typically within 1% of full scale; in all cases, within 3% of full scale.

Continuously variable sweep rates are available from 0.2

/.<sec/div. to 6 sec/div., uncalibrated.

M agnifier. ., Expands center portion of sweep 5 times. Ex­ tends fastest sweep rate to 0.04 /^sec/div; accuracy within

5%.

External Horizontal Input

Bandpass . . . DC to 500 kHz (response not more than 3 dB down within these limits).

Deflection Factor. . .1.5 volts/div.

Amplitude Calibrator

Waveform. . .Square-waves at approximately 1,000 cycles.

Am plitude.. .0.05 volt to 100 volts, peak-to-peak, in eleven fixed steps; accuracy within 3% of indicated amplitude.

Cathode-Ray Tube

T y p e .. .T55P31

PI, P2, P7 and PI 1 phosphors optional; other phosphors furnished on special order.

Accelerating Potential.. .4,000 volts.

Unblanking. . . Cutoff type, dc-coupled.

Z-Axis M odulation. . . External terminal permits RC coupling to crt cathode.

Deflection Factors at plates

Vertical-6 to 7 ’/ 2 volts per centimeter.

Horizontal-19 to 23 volts per centimeter.

Output Waveforms Available

Positive gate, coincident with sweep, at least 20 volts peak-to-peak.

1-1

Specifications— Type 5 1 6

Positive-going sawtooth, coincident with sweep, at least

150 volts peak-to-peak.

Graticule

Illumination.. .Variable edge lighting.

Display Area.. .Marked in 6 vertical and 10 horizontal divisions. Each major division divided into 5 parts on centerlines.

Power Supplies

Electronically regulated for stable operation with widely varying line voltages and loads (see Section 2 of this manual).

Power.. .Approximately 310 watts.

Ventilation

Forced filtered air. Thermal relay interrupts instrument power if the internal temperature rises above 137° F.

Mechanical Specifications

Construction.. .Aluminum alloy chassis and cabinet.

Finish.. .Photo-etched anodized front panel, blue vinyl-finish cabinet.

Dimensions.. .1 3 '/}" high, 93/4" wide, 21 '/2" deep.

Accessories

2 . . . P6006 Probe, 010-0127-00

2 . . . Instruction Manuals, 070-0225-01

1 . . . 3- to 2-wire Adapter, 103-013-00

1 . . . BNC to BNC Patch Cord, 012-0087-00

1 . . . BNC to Banana Patch Cord, 012-0091-00

1 . . . BNC to Post Jack, 012-0092-00

1 . . . 3-conductor Power Cord, 161-0010-03

1 . . . Green Light Filter, 378-0567-00

1 -2

S E C T I O N 2

P R E L I M I N A R Y

I N F O R M A T I O N

Power Requirements

The Type 516 Oscilloscope line transformer can be wired for proper operation of the instrument on nominal line volt­ ages of 110, 117, 124, 220, 234, and 248 volts at line fre­ quencies of 50 to 60 Hz. Fig. 2-1 shows the transformer primary connections to be made for each line voltage.

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4 2 2 0 V

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Pig. 2-1. Power Transformer prim ary connections.

Proper regulation of the oscilloscope power supplies will be maintained at line voltages between 105 and 125 volts when the instrument is wired for a nominal voltage of 117 volts, and within proportionate limits when it is wired for the other nominal line voltages.

When the Type 516 is supplied with a dc fan and the associated rectifiers (circuit D646 on the Power Supply cir­ cuit diagram), it can be operated at any line frequency from 50 Hz to 400 Hz, although slightly higher line volt­ ages are required at the higher line frequencies. Normally, the Type 516 Oscilloscope with the dc fan will operate satisfactorily on a 400-Hz line voltage of 117 volts when the primary of the line transformer is connected for 110- volt, 50-to-60 Hz operation, as shown in Fig. 2-1. For maximum dependability and longest life, is is recommended that the line voltage be kept at or slightly below the nominal.

Fuse Requirements

When the Type 516 Oscilloscope is connected for 110-,

117-, or 124-volt operation, a 3.2-amp slow-blowing type fuse should be used. When the instrument is connected for

220-, 234-, or 248-volt operation, a 1.6-amp slow-blowing type fuse should be used.

Cooling

Your Type 516 Oscilloscope will last much longer if you keep it as cool as possible whenever it is being operated.

A fan provides cooling by drawing air in through a filter at the rear of the instrument and blowing it over the internal components. The instrument must be placed such that the air intake is not blocked, and the air filter must be kept clean to permit adequate air circulation. Instructions for replacing and cleaning the air filter are given in Section 5 of this manual.

Furthermore, the side panels of the Type 516 Oscilloscope are designed to promote maximum air circulation over the internal components where the most heating takes place.

For this reason, the instrument should not be operated for long periods of time with the side panels off. Also, there are differences between the right-hand side panel and the left- hand side panel, so they must be mounted on the proper sides. Fig. 2-2 shows the two sides of the oscilloscope with the side panels correctly mounted.

If the temperature inside the instrument should become so high that it might cause immediate damage to com­ ponents, a thermal cutout switch will disconnect the power.

When the temperature drops to a safe level, the switch will again close automatically; no manual reset is necessary.

Fan Connections

The manner in which the fan is wired in the Type 516

Oscilloscope depends upon the line voltage for which the instrument is wired. For 110-, 117-, and 124-volt operation, the black fan lead should be connected to the third notch of the 11-notch ceramic terminal strip at the right rear of the

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2-1

Preliminary Inform ation — Type 5 1 6 bottom of the instrument. For 220-, 234-, ond 248-volf opera­ tion, it should be connected to the second notch of the same ceramic strip.

Mg. 7 -J . t y p * 51 6 O ld llo tc o p * , th a w in g »Id• p a n a lt p io p a rly mountad

Note that when a dc fan is used, no change in fan con­ nections is necessary with changes in nominal operating voltage.

SECTION 3

O P E R A T I N G

I N S T R U C T I O N S

Introduction

This section of the manual is divided into three parts.

The first part, Preliminary Instructions, is a step-by-step procedure designed to acquaint a “ first-time” operator of a

Tektronix oscilloscope with the basic operation of the Type

516. The second part, Operating Information, which starts on page 3-5, covers all phases of the operation of the

Type 516 Oscilloscope in detail. The third part, Applica­ tions, which starts on page 3-8, describes techniques which can be used for certain basic applications of the Type 516

Oscilloscope.

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The front panel of the Type 516 Oscilloscope is shown in

Fig. 3-1. Functions of all front panels controls, indicators, and connectors are described in Table 3-1.

TABLE 3-1

Preliminary Instructions

TRIGGER

SELECTOR

(black knob)

Selects source of triggering signal and slope on which triggering occurs.

TRIGGER

SELECTOR

(red knob)

Selects triggering mode.

TRIGGER INPUT Coaxial connector for application of ex­ ternal triggering signal when black TRIG­

GER SELECTOR control is in the EXT. position.

PRESET STABILITY Sets triggering stability level when red

TRIGGER SELECTOR control is in the

AUTO, position, or when STABILITY con­ trol is in the PRESET position.

TRIGGERING

LEVEL

Selects the voltage point on the triggering waveform at which the horizontal sweep is triggered.

STABILITY OR Sets Time-Base Generator for triggered or

HORIZ.-INPUT free-running operation. Also serves as

ATTEN. (red knob) attenuation control for signals applied through EXT. HORIZ. INPUT when HORIZ.

DISPLAY switch is in the EXT. position.

HORIZ. DISPLAY Sets horizontal sweep for normal or magni­ fied (X5) presentation. Also provides for application of external signal to Horizon­ tal Amplifier.

TIME/DIV.

VARIABLE

TIME/DIV.

(red knob)

Selects the desired horizontal sweep rate from 22 calibrated steps.

Provides a continuous range of sweep rates between the fixed steps selected by the

TIME/DIV. control. (The sweep rates are calibrated only when the VARIABLE con­ trol is in the CALIBRATED position.)

UNCALIBRATED Lights when VARIABLE TIME/DIV. control lamp is not in the CALIBRATED position.

A VERTICAL

VOLTS/DIV.

VARIABLE

VOLTS/DIV.

(red knob)

UNCALIBRATED lamp

SHUNT and

SERIES adjustments

POLARITY

POSITION

(red knob)

DC. BAL.

Selects the sensitivity of the A VERTICAL

Channel from nine calibrated steps.

Provides a continuous range of sensitivity values between the fixed calibrated steps selected by the VOLTS/DIV. control.

(Sensitivity is calibrated only when the

VARIABLE control is in the CALIBRATED position.)

Lights when VARIABLE VOLTS/DIV. con­ trol is not in the CALIBRATED position.

Compensation adjustments for attenuator.

(See Calibration Section.)

Selects ac or dc coupling of signal applied to A VERTICAL input connector, and nor­ mal or inverted presentation on the screen.

Controls vertical positioning of A VERTI­

CAL Channel signal on the crt screen.

Provides for vertical stability of no-signal trace for all positions of the A VERTICAL

VOLTS/DIV. control.

3-1

Operating Instructions — Type 5 1 6

TYPE 5)6 OSCILLOSCOPE

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Input connector Input connector for signal through A VERTI­

CAL Channel.

B VERTICAL

(All controls in the B VERTICAL Channel are the same as those in the A VERTICAL Channel except that they control the signal applied through the B VERTICAL Channel input connector.)

FOCUS

OTHERS

Focuses the trace or spot on the screen.

INTENSITY

ASTIGMATISM

Controls the brightness of the trace or spot on the screen.

Controls the roundness of the spot on the screen.

Turns the instrument on and off, and con­ trols graticule illumination.

POWER AND

SCALE ILLUM.

MODE

HORIZONTAL

POSITION

+GATE OUT connector

Provides for display of signal in A VERTI­

CAL Channel or B VERTICAL Channel in­ dependently, or both channels either on alternate sweeps of the trace or alternate­ ly at 150-kHz rate.

Controls horizontal positioning of both A and B VERTICAL Channel signals on the crt screen.

Provides +25-volt (approximate) positive gate coincident with sweep time.

SAWTOOTH

OUT connector

AMPLITUDE

CALIBRATOR*

CAL. OUT connector

Provides + 150-volt (approximate) sawtooth waveform coincident with sweep time.

Selects amplitude of square-wave available at CAL. OUT connector from 11 calibrated steps.

Coaxial connector for supplying Amplitude

Calibrator output.

* On some instruments, this control is labeled SQUARE-WAVE

CALIBRATOR.

Initial Setup

INITIAL OPERATION

The following paragraphs describe a simple procedure by which you can become acquainted, in a general way, with the controls of the Type 516 Oscilloscope and the effect they have on its operation.

To initially set up the Type 516 Oscilloscope for operation, proceed as follows:

1. Connect jumper wires from the CAL. OUT connector to the A and B VERTICAL Channel input connectors and set the oscilloscope controls as shown in Fig. 3-1.

2. Adjust the FOCUS, INTENSITY, and ASTIGMATISM con­ trols to obtain sharply defined traces o f useful brightness.

Operating Instructions — Type 516

3. Center one waveform in the upper half of the graticule with the A VERTICAL Channel POSITION control and the other waveform in the lower half of the graticule with the

B VERTICAL Channel POSITION control.

Functions of Controls

With the oscilloscope set up as described, turn the MODE switch through each of its positions. Note that in the A

ONLY and B ONLY positions only one waveform is display­ ed, and in the ALTERNATE and CHOPPED positions, both waveforms are displayed. (When the MODE switch is in the

CHOPPED position, the display may not be stable.) The dif­ ference between the ALTERNATE and CHOPPED positions is described later in this section of the manual. Set the MODE switch to the A ONLY position.

Set the red TRIGGER SELECTOR control to AC. Move the

TRIGGERING LEVEL control throughout its range, noting that the waveform appears when the control is set toward the middle of its range and disappears as it is set toward either end of its range. Set the AMPLITUDE CALIBRATOR control to 5. Move the TRIGGERING LEVEL control throughout its range again, noting that the waveform is present during a narrower portion of its range than before. Set the AMPLI­

TUDE CALIBRATOR control to 2. Note that the waveform appears during still less of the range of the TRIGGERING

LEVEL control.

Set the AMPLITUDE CALIBRATOR control to 10 and the A

VERTICAL VOLTS/DIV. control to 10, and then to 20, ad­ justing the TRIGGERING LEVEL control as described in the previous paragraph at each step. Note that the adjustment of the TRIGGERING LEVEL control becomes more critical as the triggering signal is reduced, whether by actual reduction of the signal or reduction of vertical sensitivity. (Changing the vertical sensitivity affects the amplitude of the triggering signal only when an internal triggering signal is used.)

Set the AMPLITUDE CALIBRATOR control to 2 and the A

VERTICAL VOLTS/DIV. control to 10. Set the STABILITY and

TRIGGERING LEVEL controls fully clockwise. Turn the STA­

BILITY control counterclockwise until the trace disappears.

Then set the TRIGGERING LEVEL control for a stable display.

This is the method to use if a stable display is not present when the red TRIGGER SELECTOR control is in the AUTO, position, or cannot be obtained by means of the TRIGGERING

LEVEL control alone with the STABILITY control set in the

PRESET position.

Set the AMPLITUDE CALIBRATOR control to 1 and the A

VERTICAL VOLTS/DIV. control to 2, then to 5, then to 10, and then to 20. At each setting of the A VERTICAL VOLTS/

DIV. control, adjust the STABILITY and TRIGGERING LEVEL controls, as described in the previous paragraph, for a stable display. Note that as the vertical deflection on the screen becomes less, stable triggering becomes more difficult to ob­ tain, until at the higher settings of the VOLTS/DIV. control, it may be impossible to obtain. This is because the setting of the VOLTS/DIV. control also affects the amplitude of the internal triggering signal. Normally, vertical deflection of at least one-fifth of a major graticule division is required for proper triggering from an internal signal.

Remove the jumper wire from the B VERTICAL input con­ nector and connect it from the CAL. OUT connector to the

3-3

Operating Instructions — Type 516

TRIGGER INPUT connector (leave the jumper wire connected from the CAL. OUT connector to the A VERTICAL input con­ nector). Set the black TRIGGER SELECTOR control to - f EXT.

You have now set up the oscilloscope for external triggering, with the Calibrator supplying the external triggering signal as well as the displayed signal.

Set the A VERTICAL VOLTS/DIV. control to 1 and the

AMPLITUDE CALIBRATOR control to 1, then to .5, then to

.2, then to .1, and then to .05. At each setting of the AMPLI­

TUDE CALIBRATOR control, set the STABILITY and TRIGGER­

ING LEVEL controls for a stable display, if possible. Note that at the lowest settings of the AMPLITUDE CALIBRATOR control, stable triggering becomes very difficult or impossible to obtain. This is because there is not sufficient triggering signal being applied to the Time-Base Trigger. Normally, an external triggering signal of about 0.5 volt peak-to-peak amplitude is required for proper triggering.

Set the AMPLITUDE CALIBRATOR control to 1 again. Turn the A VERTICAL VOLTS/DIV. control counterclockwise. Note that no matter how small the deflection on the crt becomes, the display continues to be triggered. This is because the setting of the VOLTS/DIV. control has no effect on an ex­ ternal triggering signal.

Set the AMPLITUDE CALIBRATOR control to 20 and the

A VERTICAL VOLTS/ DIV. control to 5. Set the black TRIG­

GER SELECTOR control to +INT., and set the STABILITY and

TRIGGERING LEVEL control for a stable display. Rotate the

TRIGGERING LEVEL control back and forth and note the vertical- variation in the starting point of the square wave at the left-hand edge of the screen. (It may be necessary to move the display slightly to the right with the HORIZONTAL

POSITION control to observe this.) Note also that the dis­ play starts on a positive-going portion of the waveform. Set the black TRIGGER SELECTOR control to —INT. and rotate the TRIGGERING LEVEL control as before. Note that the display now starts on a negative-going portion of the square- wave.

With the A VERTICAL POSITION control, move the dis­ play up and down on the screen. Note that the point at which the waveform starts at the left-hand edge of the screen remains fixed relative to the top and bottom of the waveform as the display moves. This is because when the red TRIGGER

SELECTOR control is set to AC, triggering occurs at a given level relative to the average dc level of the entire signal. Set the red TRIGGER SELECTOR control to DC, and move the dis­ play up and down on the screen with the A VERTICAL POSI­

TION control. (If the display disappears, turn the A VERTICAL

POSITION control in the opposite direction to make it re­ appear.) Note that the point at which the waveform starts at the left-hand edge of the screen remains approximately fixed relative to the graticule. This is because when the red

TRIGGER SELECTOR control is set to DC, triggering occurs at a specific dc level with respect to ground.

Set the AMPLITUDE CALIBRATOR control to 10 and the red TRIGGER SELECTOR control to AUTO. Switch the TIME/-

DIV. and VARIABLE TIME/DIV. controls through their ranges and note the effect on the display. Note that the associated

UNCALIBRATED lamp lights when the VARIABLE TIME/DIV. control is moved away from the CALIBRATED position. Re­

3-4 turn the TIME/DIV. control to the ,5/xSEC position and the

VARIABLE TIME/DIV. control to the CALIBRATED position.

With the HORIZONTAL POSITION control, position the dis­ play horizontally so that one of the vertical portions of the waveform coincides with the center graticule line. Set the

HORIZ. DISPLAY switch to the MAG. position. Note that the center portion of the waveform has been expanded. Specifi­ cally, the portion of the waveform which occupied the center two divisons horizontally when the HORIZ. DISPLAY switch was in the NORM, position now occupies the entire graticule.

Return the HORIZ. DISPLAY switch to the NORM, position.

Switch the A VERTICAL POLARITY switch to the NORM.

DC position. Note the change in the position of the wave­ form on the screen. This is because the dc component of the square wave is now included in the display whereas, in the

AC position, the display showed only the variation around the average dc level of the square wave.

To see the effect of the INV. positions of the POLARITY switch, set the black TRIGGER SELECTOR control to +EXT.

(The jumper wire must still be connected from the CAL. OUT connector to the TRIGGER INPUT and A VERTICAL input con­ nectors.) Now move the A VERTICAL POLARITY switch back and forth between NORM. DC and INV. DC. Note that as the switch moves from the NORM, positions to the INV. po­ sitions, the square wave becomes inverted on the screen.

Note further that the position of the bottom of the square wave on the screen when the switch is at NORM. DC cor­ responds to the position of the top of the square wave on the screen when the switch is at INV. DC. This is because the negative portion of the Calibrator square wave is at dc ground and the signal is being inverted about the dc ground potential point.

The effect of all of the preceding operations is the same when the MODE switch is in the B ONLY position except that the B VERTICAL Channel controls must be used instead of the A VERTICAL Channel controls. The effect of the op­ erations with the MODE switch in the ALTERNATE or CHOP­

PED positions is approximately the same, except that external triggering should be used for best results.

Graticule Illumination

Graticule illumination can be adjusted to suit the lighting conditions of the room by means of the POWER AND SCALE

ILLUM. control. Turning the control clockwise increases the graticule illumination. It is possible to extinguish the graticule illumination completely by turning the control counterclock­ wise.

The graticule of the Type 516 Oscilloscope can be illumin­ ated so that it appears to have either red or white graticule markings. The markings can be changed from white to red or red to white simply by removing the graticule cover and inverting the graticule. As a general rule, white graticule lines are superior to red for photographic purposes.

O perating Instructions — Type 5 1 6

O perating Information

Input Coupling

.The Type 516 Oscilloscope is provided with two input con­ nectors to the Vertical Amplifier. Signals may be connected to both of these input connectors at the same time and, by means of the MODE switch, they may be displayed one at a time or both together on the crt screen. When only one signal is to be displayed, it may be connected to either input connector.

Polarity Switches

Input signals to both channels may be either ac or dc coupled and may be displayed either normally or inverted on the crt screen by placing the corresponding POLARITY switches to the appropriate positions. Dc coupling applies both the ac and dc components of the input signal to the amplifier circuits. This permits you to measure the dc volt­ age level as well as the amplitude of the ac component.

However, it is sometimes neither necessary nor desirable to display the dc component, and in such cases ac coupling should be used. Placing the POLARITY switch to either of the AC positions inserts a capacitor in series with the input connector. This capacitor blocks the dc component while al­ lowing the ac component to be displayed.

MODE Switch

When the MODE switch is in the A ONLY position or the

B ONLY position, only the signal which is applied to the corresponding vertical channel will be displayed on the crt. When the MODE switch is in the ALTERNATE position, the oscilloscope will display the signals in each of the chan­ nels on alternate sweeps of the trace. When the MODE switch is in the CHOPPED position, the oscilloscope will display the signals alternately at about a 150-kHz rate; in other words, the signal in the A Channel is displayed for about 3'/3 microseconds and then the signal in the B Chan­ nel is displayed for about 3'/3 microseconds. At the faster sweep rates, the CHOPPED mode of operation causes the traces to take on a dotted appearance. At the slower sweep rates, the ALTERNATE mode of operation causes the alter­ nate appearance of the traces to become quite noticeable which makes it difficult to compare the two. Therefore, in general, the ALTERNATE mode of operation is most useful at the faster sweep rates and the CHOPPED mode of op­ eration is most useful at the slower sweep rates.

DC Balance Adjustment

Occasionally, there is need for adjustment of the dc bal­ ance of one or both input channels. This need is indicated by a vertical shift in the position of a no-signal trace as the

VARIABLE VOLTS/DIV. control is rotated.

To make this adjustment, set the MODE switch to ALTER­

NATE. With no signal connected to the input connectors, set the STABILITY control fully clockwise and position the two

@i free-running traces on the screen. Rotate each VARIABLE

VOLTS/DIV. control back and forth, and simultaneously ad­ just the corresponding DC BAL. adjustment until the trace position is no longer affected by rotation of the VARIABLE

VOLTS/DIV. control.

Input Connections

Certain precautions must be observed in connecting the oscilloscope to the signal source to prevent errors due to stray electric or magnetic coupling in the leads. Shielded cables shoula be used whenever possible, with the shield connected to the chassis of both the oscilloscope and the signal source. Regardless of the type of input lead used, it should be kept as short as possible.

In broadband applications, it might be necessary to ter­ minate a coaxial input cable with a resistor or an attenu­ ating pad presenting a resistance equal to the characteris­ tic impedance of the cable. This is to prevent resonance effects and "ringing” (high-frequency damped oscillation).

It becomes more necessary to terminate the cable properly as the length of the cable is increased. The termination is generally placed at the oscilloscope end of the cable, al­ though many sources require an additional termination at the source end of the cable as well.

As nearly as possible, the actual operating conditions of the equipment being tested must be maintained. For ex­ ample, the equipment should work into a load impedance equal to that which it will see in actual use. The input con­ nectors of the Type 516 Oscilloscope present an input im­ pendence of 1 megohm in parallel with 20 picofarads. With a few feet of shielded cable, the input capacitance may well be as much as 100 picofarads. In cases where the effects of these resistive and capacitive loads are significant in terms of the equipment being tested, you should use an attenuator probe as described in the next paragraph.

Use of Probes

Use of the attenuator probes furnished with the Type 516

Oscilloscope reduces the capacitive and resistive loading effect on the equipment under test and, at the same time, reduces sensitivity. Connected to the input connectors of the

Type 516 and properly compensated, these probes present a characteristic input impedance of 10 megohms in parallel with 8 picofarads and have an attenuation ratio of 10:1.

The maximum-voltage rating of the probes is 600 volts. Ex­ ceeding this rating, either in peak ac volts or dc volts, may result in damage to the probes.

When making amplitude measurements with an attenuator probe, be sure to multiply the observed amplitude by the attenuation factor of the probe. If the waveform being dis­ played contains fast-changing portions, it is generally neces­ sary to clip the probe ground lead to the chassis of the equipment being tested.

3-5

O perating Instructions — Type 5 1 6

CAL. OUT

D isplay several cycles of C a lib ra to r w aveform on crt screen.

Hold probe barrel and loosen locking sleeve. Hold probe base and adjust probe barrel fo r fla t-to p p e d square waves.

Hold probe barrel and carefully tigh ten locking sleeve.

Selecting the Trigger Source

For most applications the sweep can be triggered by the input waveform. The only requirement is that the input signal be large enough to provide at least one-fifth of a major graticule division of deflection on the screen at the sensitivity level for which the VOLTS/DIV. control is set. To obtain triggering of the sweep from the input waveform, set the black TRIGGER SELECTOR control to either the + INT. or the —INT. position (the significance of the + and — will be explained in a later paragraph).

For dual-trace operation, it is usually advantageous to trigger the sweep with some external trigger. In this way, the true phase relationship of the two waveforms can be shown and triggering is obtained more easily. In order to obtain a stable display, it is necessary that the external trig­ gering waveform bear a fixed time relationship to the input waveforms. The external triggering signal must be at least

0.2 volt in amplitude to assure proper triggering. To use an external waveform for triggering the horizontal sweep, con­ nect the signal to the TRIGGER INPUT connector and set the black TRIGGER SELECTOR control to the +EXT. or —EXT. position. External triggering may also be used with single trace operation where desired.

When you are observing a waveform which bears a fixed time relationship to the ac line frequency, you may wish to trigger the sweep from the line-frequency waveform. To do this, place the black TRIGGER SELECTOR control in the

+LINE or —LINE position.

When the black TRIGGER SELECTOR control is set to one of the + positions (+INT., +EXT., -+ LINE), the sweep is trig­ gered on a positive slope of the triggering signal. When the control is set to one of the — positions (—INT., —EXT.,

—LINE), the sweep is triggered on a negative slope of the triggering signal. In most cases, selection of the triggering slope is not critical.

Fig. 3-2. Probe compensation adjustment.

An adjustable capacitor in the probe body compensates for variations in the input capacitance from one instrument to another or between two input connectors of one instru­ ment. To insure the accuracy of pulse and transient measure­ ments, this adjustment should be checked frequently. Fig.

3-2 illustrates the method of adjusting the compensation of the probe.

TRIGGERED OPERATION

For most uses of your oscilloscope, you will need to get a stable display of some recurrent waveform. In order to ob­ tain a stable display, it is necessary to start the horizontal sweep consistently at the same time relative to recurring cy­ cles of the input waveform. The sweep therefore must be triggered by the input waveform itself or by some waveform which bears a fixed time relationship to the input waveform.

The following instructions tell you how to select and use the proper triggering signal for various applications of the oscil­ loscope.

3-6

Selecting the Triggering Mode (HF SYNC,

AUTO., AC, DC)

The most useful triggering mode is the automatic mode, obtained by setting the red TRIGGER SELECTOR control to the AUTO, position. The automatic mode of triggering provides a stable display with virtually any triggering signal from about 50 Flz to 2 MFlz in frequency. No adjustment of the STABILITY or TRIGGERING LEVEL controls is necessary since these two functions are automatically set to their op­ timum values internally. (In the other triggering modes, it is necessary to set one or both of these controls to obtain a stable presentation.) In addition, the automatic mode of triggering provides a free-running trace on the screen in the absence of any triggering signal. This trace may be used, under certain conditions, as a base line from which to make dc measurements. It also gives a constant indication of the readiness of the oscilloscope to accept a triggering signal for the display of a stable waveform.

In the ac triggering mode, obtained by setting the red

TRIGGER SELECTOR control in the AC position, suitable triggering can be obtained with signals from about 16 Flz to 5 MFfz. When the ac triggering mode is used, it is usually d

necessary to adjust the STABILITY and TRIGGERING LEVEL controls to obtain stable triggering. In this way, the point on the signal at which triggering will occur may be selected; in the automatic triggering mode, triggering occurs at the average dc level of the waveform.

The dc triggering mode, obtained by setting the red TRIG­

GER SELECTOR control in the DC position, is particularly useful in triggering from very low-frequency waveforms.

The trigger pulses are generated when the signal reaches a given dc level relative to ground. Suitable triggering can be obtained from triggering signals from dc to about 5 MHz.

In the dc triggering mode, as in the ac triggering mode, it is usually necessary to adjust the STABILITY and TRIGGERING

LEVEL controls to obtain stable triggering.

The high-frequency synchronized mode, obtained by set­ ting the red TRIGGER SELECTOR control in the HF SYNC position, should be used to display signals from about 5 MHz to 15 MHz. In this mode of operation, the Time-Base Trig­ ger circuit is bypassed and the triggering signal itself, either internal or external, synchronzies the free-running opera­ tion of the Time-Base Generator. For this reason, neither the TRIGGERING LEVEL control nor the + and — feature of the black TRIGGER SELECTOR control I ave any effect on the display. The sweep will always be started on a negative-going slope of the signal. It is usually necessary to adjust the STABILITY control to obtain a stable display.

Operating Instructions — Type 5 1 6 or throughout a considerable portion of its range. You should set the control where it produces the most favorable display for the purpose desired.

When the red TRIGGER SELECTOR control is in the HF

SYNC position, the TRIGGERING LEVEL control has no effect and a stable display is obtained through the use of the STA­

BILITY control only. In this case, rotate the STABILITY con­ trol through its range until the best display is obtained on the screen.

Setting the Sweep Rate

Throughout the operation of the oscilloscope, the TIME/

DIV. control may be adjusted at any time to present the de­ sired waveform on the crt. For most applications, the TIME/

DIV. control is set to display several cycles of a recurring waveform. Sometimes, when it is desired to inspect some portion of a single cycle closely, it will be best to adjust the

TRIGGERING LEVEL control so that the portion of the wave­ form to be inspected is at the extreme left-hand edge of the graticule and then set the TIME/DIV. control to the fastest sweep rate (smallest numercial setting) possible, still keeping the desired portion of the waveform on the screen. The black numbers in the inner ring around the TIME/DIV. control in­ dicate the sweep rate when the HORIZ. DISPLAY switch is in the NORM, position.

Adjusting the STABILITY and TRIGGERING LEVEL

Controls

As mentioned previously, it is not necessary to adjust the

STABILITY and TRIGGERING LEVEL controls as long as stable triggering can be obtained in the automatic mode of opera­ tion. However, if stable triggering cannot be obtained in the automatic mode, it will be necessary to use one of the other modes. In this case, it will usually be necessary to adjust the STABILITY control or the TRIGGERING LEVEL control, or both, to obtain a stable presentation.

Normally, in the ac and dc modes, the STABILITY control can be set in the PRESET position, and stable triggering ob­ tained through use of the TRIGGERING LEVEL control only.

When it is not possible to obtain stable triggering with the

STABILITY control in the PRESET position, then you should use the following procedure in adjusting the STABILITY and

TRIGGERING LEVEL controls:

1. Set both controls fully clockwise.

2. Turn the STABILITY control counterclockwise until the trace just disappears.

3. Set the TRIGGERING LEVEL control for a stable display.

When the TRIGGERING LEVEL control is set in the -f region of its range, triggering of the sweep will take place at a point on the triggering signal above its average dc level.

When the TRIGGERING LEVEL control is set in the — region of its range, triggering of the sweep will take place at a point on the triggering signal below its average dc level.

With some signals it will be possible to obtain stable trig­ gering at several positions of the TRIGGERING LEVEL control

Magnification of the Sweep

Any part of the trace may be expanded horizontally by a factor of 5 through the use of the HORIZ. DISPLAY switch.

To expand a given portion of the sweep, first set that portion to the center of the graticule by means of the HORIZONTAL

POSITION control. Then set the HORIZ. DISPLAY switch to the MAG. position. The magnified sweep feature is particu­ larly useful for inspecting portions of the waveform which cannot be expanded sufficiently and still kept on the screen by the method described in the previous paragraph. The small blue numbers in the outer ring around the TIME/DIV. control give the true sweep rates when the HORIZ. DISPLAY switch is in the MAG. position.

FREE-RUNNING OPERATION

When the STABILITY control is set fully clockwise (and the red TRIGGER SELECTOR control is not in the AUTO, position), the Time-Base Generator free runs to produce a sweep independent of any synchronizing signal. The fre­ quency of the sweep can be varied from about 0.012 Hz to 100 kHz by means of the TIME/DIV. control and the associated VARIABLE control.

Two outputs coincident with the sweep are available at front-panel connectors. A positive gate about 25 volts in amplitude is available at the + GATE OUT connector, and a positive-going sawtooth waveform, rising to a maximum amplitude of about 150 volts, is available at the SAWTOOTH

OUT connector. Applications for free-running operation are discussed later in this section.

3-7

Operating Instructions — Type 5 1 6

Applications

The following paragraphs describe procedures for making measurements of voltage, elapsed-time, and phase-shift with the Type 516 Oscilloscope. No attempt has been made to describe any but the most basic techniques. Familiarity with the instrument will enable the operator to apply the essence of these techniques to a wide variety of applications, de­ pending upon the problem at hand.

Voltage Measurements

To measure the ac component of a signal, proceed as follows:

1. Display the waveform over as large a portion (verti­ cally) of the screen as possible by adjusting the appropriate

VOLTS/DIV. control.

2. With the aid of the graticule, measure the vertical distance (in graticule divisions) between the two points on the waveform at which the voltage measurement is desired.

Make sure the appropriate VARIABLE VOLTS/DIV. control is in the CALIBRATED position. On small voltage measure­ ments, the width of the trace can make up an appreciable part of the entire measurement. For this reason, it is im­ portant to take all readings in a given measurement from the same side of the trace.

3. Multiply the distance between the two points by the setting of the appropriate VOLTS/DIV. control and by the attenuation factor, if any, of the probe. This is the voltage between the two points of the waveform.

To measure the dc level at some point on a signal, pro­ ceed as follows:

1. Set the POLARITY switch of the channel to which the signal is applied to the NORM. DC position.

2. Set the corresponding VOLTS/DIV. control such that the expected voltage (at the oscilloscope input connector) is not more than six times the setting of the control. Make sure the VARIABLE VOLTS/DIV. control is in the CALIBRA­

TED position.

3. Set the oscilloscope controls to produce a free-running trace.

4. Touch the oscilloscope probe tip to a ground point, and with the appropriate VERTICAL POSITION control po­ sition the trace so that it lies along one of the horizontal lines of the graticule. This line will be used as a ground reference line; its position in any given case will depend upon the polarity and amplitude of the input signal to be measured. Do not adjust the VERTICAL POSITION control after the reference line has been established.

5. Remove the probe tip from ground and connect it to the signal source. Adjust the triggering controls for a stable display.

6. Measure the distance, in graticule divisions, from the ground reference line established in step 4 to the point at which the dc voltage level is desired.

3-8

7. Multiply this distance by the setting of the appropriate

VOLTS/DIV. control and the attenuation factor, if any, of the probe. This is the dc level of the point measured.

Time and Frequency Measurements

To measure the time interval between two points on a waveform, proceed as follows:

1. Apply the signal to either of the Vertical Channels and set the triggering controls for a stable display. Make sure the VARIABLE TIME/DIV. control is in the CALIBRATED po­ sition.

2. Measure the horizontal distance, in graticule divisions, between the two points whose interval you wish to find.

3. Multiply the distance measured by the setting of the

TIME/DIV. control. (If the HORIZ. DISPLAY switch is in the

MAG. position, use the blue numbers). This is the time in­ terval between the two points measured.

To determine the frequency of a recurrent waveform, sim­ ply take the reciprocal of the time interval between cor­ responding points on two consecutive cycles of the waveform.

Phase-Shift Measurements

A phase comparison of two signals of the same frequency can be made by making use of the dual-trace feature of the

Type 516 Oscilloscope. To make this comparison, proceed as follows:

1. Apply the two signals to the two input connectors and set the MODE switch to the CHOPPED or ALTERNATE po­ sition. (In general, the CHOPPED position is more suitable for low-frequency signals and the ALTERNATE position is more suitable for high-frequency signals). Apply one of the signals as an external trigger and set the triggering controls for a stable presentation. Center both signals vertically on the graticule.

2. Set the TRIGGERING LEVEL and HORIZONTAL PO­

SITION controls so that the leading waveform starts exactly at the point where the horizontal centerline meets the verti­ cal line at the left-hand edge of the graticule.

3. Measure the distance, in graticule divisions, from the left-hand edge of the graticule to the point where the other waveform crosses the horizontal centerline. For the most ac­ curate measurement, use the fastest sweep/ rate possible.

Make sure that the VARIABLE TIME/DIV. control is in the

CALIBRATED position.

4. Multiply the distance measured in step 3 by the setting of the TIME/DIV. control and divide by the period of one cycle of the waveform. Multiply the result by 360°. This is the phase difference between the two signals.

Application of Free-Running Operation

Sometimes it is desired to display the output of a device which requires a triggering signal for each cycle of output, such as a monostable or bistable multivibrator. In this case, the Type 516 Oscilloscope can be used for triggering the device as well as displaying its output waveform. To set the oscilloscope up for this type of operation, proceed as follows:

1. Set the STABILITY control fully clockwise.

2. Connect a lead between either the + GATE OUT con­ nector or the SAWTOOTH OUT connector and the input to the device under observation. (The signal at the +GATE

OUT connector has an amplitude of about 25 volts and the signal at the SAWTOOTH OUT connector has an amplitude of about 150 volts,- therefore, it may be necessary to scale

O perating Instructions — Type 5 1 6 these down by means of a voltage divider, depending upon the equipment with which they are to be used.)

CAUTION

To avoid shorting out the + g a te or sawtooth voltage from the oscilloscope, make the connection to the device under observation before connecting the lead to the oscilloscope connector. Do not con­ nect a resistance o f less than about 2k between the

+ GATE OUT connector and ground, or less than about 10k between the SAWTOOTH OUT connec­ tor and ground; to do so might damage compo­ nents in the oscilloscope.

3. Connect the output of device under observation to the vertical input connector of the Type 516.

The output of the device will now be synchronized to the free-running sweep of the oscilloscope and will appear as a stable display on the screen.

3-9

Type 5 1 6

NOTES

C I R C U I T

D E S C R I P T I O N

A block diagram of the Type 516 Oscilloscope is shown in Fig. 4-1. In general, operation of the oscilloscope is as follows:

The signal or signals to be displayed are applied to the

Vertical Amplifier through the A and/or B input connectors.

The Vertical Amplifier amplifies the signals and applies them through the Delay Line to the vertical deflection plates of the cathode-ray tube. A sample of the signal is taken out at the Vertical Amplifier and applied to the Time-Base Trigger.

The Time-Base Trigger generates a trigger pulse which bears a selected fixed time relationship to the incoming signal. This trigger pulse triggers the Time-Base Generator which gen­ erates a linear sawtooth waveform. The sawtooth waveform is applied through the Horizontal Amplifier to deflect the crt beam horizontally at a selected fixed rate. Provisions are also made for generating trigger pulses which bear a selected fixed time relationship to some external signal or to the ac line waveform. If desired, the Time-Base Generator may be disabled and an external signal applied directly to the Hori­ zontal Amplifier. The Amplitude Calibrator provides an am­ plitude-calibrated square wave for use in calibrating the gain of the Vertical Amplifier and adjusting the compensa-

Fig. 4 -1 . Type 516 Oscilloscope block diagram .

4-1

Circuit Description — Type 516 tion of probes. The Power Supply supplies regulated voltages and currents as required throughout the oscilloscope.

The remainder of this section of the manual presents a more detailed description of the operation of each of the oscilloscope circuits. Throughout the discussion, you should refer to the circuit diagrams contained in the Diagrams sec­ tion of this manual.

VERTICAL AMPLIFIER

The Vertical Amplifier of the Type 516 Oscilloscope con­ tains two separate Input Amplifier Channels (A and B), a common Output Amplifier, and a Switching Circuit. Signals may be applied to both Input Amplifier Channels, and the

Switching Circuit makes it possible to display one signal as a single trace on the crt or to display both signals as two separate traces. It does this by turning the outputs of the two Input Amplifier Channels alternately off and on, either on alternate sweeps of the trace or at a 150-kHz switching rate.

The Type 516 can also be used as a conventional single­ channel oscilloscope with an input signal on one channel only.

A block diagram of the Vertical Amplifier is shown in

Fig. 4-2.

Input Amplifier Channels

Since the two Input Amplifier Channels are identical, ex­ cept for the CHANNEL A GAIN SET adjustment, the follow­ ing discussion refers to the A Channel only. Operation of the

B Channel is identical.

The signal to be displayed is applied through the PO­

LARITY switch and the VOLTS/DIV. control to one of the grids of the Input Cathode Follower, V423. When the PO­

LARITY switch is in either of the AC positions, the signal is coupled through C400 which prevents the dc component of the signal from being applied to the Input Cathode Follower grid. When the POLARITY switch is in one of the NORM, positions, the signal is applied to the grid of V423A and is displayed on the crt in the normal position, with the positive portions toward the top of the screen. When the POLARITY switch is in one of the INV. positions, the signal is applied to the grid of V423B and is displayed on the crt in the in­ verted position, with the positive portions toward the bottom of the screen.

A

INPUT

CONNECTOR

B

INPUT

CONNECTOR

Fig. 4 -2 . V ertical A m p lifie r block diagram .

4 - 2

The basic sensitivity of the Vertical Amplifier is 0.05 volt per divison. In other words, 0.05 volt of signal at the grids of the Input Cathode Followers will produce one division of deflection on the crt. Changes in sensitivity of the oscillo­ scope are accomplished by attenuation of the input signal before it reaches the Input Cathode Followers. A “ straight- through" position and eight different values of attenuation may be selected by the VOLTS/DIV. control to provide nine fixed calibrated sensitivities of 0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10, and 20 volts per division. The attenuators are resistance and capacitance dividers which provide constant attenua­ tion throughout the frequency range of the instrument while maintaining a constant input impedance of 1 megohm and

20 picofarads at the input connectors.

The Input Amplifier, V434, is a cathode-coupled paraphase amplifier which converts the single-ended input from the In­ put Cathode Follower to a push-pull output. The gain of this stage can be adjusted by means of the VARIABLE VOLTS/

DIV. control which varies the coupling resistance between the two cathodes. This control permits a continuous range of uncalibrated sensitivity values between the steps selected by the VOLTS/DIV. control and up to about 50 volts per division of deflection. Switch SW442, which switches the UNCALI­

BRATED lamp, B442, in and out of the circuit, is linked mechanically to the VARIABLE VOLTS/DIV. control. Thus', when the VARIABLE VOLTS/DIV. control is moved away from the CALIBRATED position (fully clockwise), the UNCALIBRA­

TED lamp is energized to indicate that the vertical sensitivity is not calibrated.

The CHANNEL A GAIN SET is used to set the gain of the A Channel equal to that of the B Channel. This provides equal deflection with equal signals through both channels, provided both VOLTS/DIV. controls are set to the same po­ sition and both VARIABLE controls are in the CALIBRATED position.

The DC BAL. control in the cathode circuit of V423B is adjusted to place both cathodes of the Input Amplifier at the same potential so that under no-signal conditions there is no current flowing through R440 and R441. This provides vertical stability of the trace as the value of R441 is changed with the VARIABLE VOLTS/DIV. control.

The POSITION control varies the average dc level about which the signal moves at the grids of the Switched Ampli­ fier, V454. Since the entire Vertical Amplifier is dc coupled, this varies the position of the trace on the screen. The PO­

SITION control also affects the average dc plate voltage of the Input Amplifier and, therefore, can disturb the dc balance of that circuit. For this reason, a small portion of the posi­ tioning voltage at each plate is fed back to the opposite cathode (through R443 and R444) to counteract this effect.

The turning off and on of the two channels is accomplished in the Switched Amplifiers by the operation of the Switching

Circuit, which will be discussed later in this section.

Output Amplifier

The push-pull output of the Switched Amplifier is applied to the Driver Cathode Followers, V463, which, in turn, drive the Output Amplifier, V464 and V474. The output of the

Output Amplifier is connected through the Delay Line to the vertical deflection plates of the crt. The Delay Line delays the application of the signal to the deflection plates until

Circuit Description — Type 5 1 6 the crt has been unblanked and the horizontal sweep started.

This delay allows the leading edge of fast-rising pulses to be displayed.

The overall gain of the Vertical Amplifier is adjusted by varying the degeneration between the two cathodes of the

Output Amplifier. This is done with the GAIN ADJ. potentio­ meter, R478.

The parallel network of D477, D478, and R477 lowers the effective resistance between the two cathodes as the dc po­ tential between them exceeds about 0.2 volt. The purpose of this network is to compensate the compression of the crt display which might otherwise occur when the POSITION control is near the end of its range.

Trigger Pickoff

The output from V464 is also applied through two cathode followers, V493A and V493B, to the TRIGGER SELECTOR switch, SW10A. Thus, when SW10A is in either of the INT. positions, a portion of the output of the Output Amplifier is applied to the Time-Base Trigger to start the horizontal sweep.

B493 and B494 protect V493 against cathode-to-grid break­ down when the instrument is first turned on by holding the cathodes within a safe operating level of the grids until the heater has warmed up enough to allow the tube to conduct.

After V493 starts conducting, B493 and B494 stop conducting and are therefore effectively removed from the circuit.

Switching Circuit

Selection of the input channel whose output is to be ap­ plied to the Driver Cathode Followers is accomplished by means of the Switching Circuit. A block diagram of the

Switching Circuit is shown in Fig. 4-3.

The Switching Circuit may be operated in any one of four modes, depending upon the setting of the MODE switch,

SW585. When the MODE switch is in the A ONLY position, the grid of V594A (one side of the Switching Amplifier) is at about ground potential and the grid of V594B is at about

—96 volts. Therefore, V594A is conducting heavily, and

V594B is cut off. The plate of V594A and the cathodes of the A Channel Switched Amplifier are at about +57 volts.

The plate of V594B and the cathodes of the B Channel

Switched Amplifier are at about + 63 volts (they are pre­ vented from going further positive by conduction through

D554). The average dc potential of the grids of both Switch­ ed Amplifiers is about + 56 volts. Therefore, with only about one volt of bias, the A Channel Switched Amplifier will con­ duct and amplify any signal applied to its grids. Meanwhile, with about 7 volts of bias, the B Channel Switched Amplifier will be cut off. So the signal in the A Channel is applied through the Driver Cathode Followers and the Output Am­ plifier to the crt deflection plates, and the signal in the B

Channel is blocked at the B Channel Switched Amplifier.

When the MODE switch is in the B ONLY position, just the opposite set of conditions exists; the B Channel Switched

Amplifier conducts and the A Channel Switched Amplifier is cut off. So the B Channel signal is displayed on the crt.

When the MODE switch is in the ALTERNATE position, the crt displays the signal in one channel for one sweep of

4-3

Circuit Description — Type 5 1 6

FROM

TIME-BASE

GENERATOR

TO

B CHANNEL

SWITCHED AMPLIFIER

Fig. 4 -3 . Switching Circuit block diagram .

the beam, and then the signal in the other channel for the next sweep of the beam. In this mode of operation, V585 becomes a bistable Switching Multivibrator which is switched from one state to the other at the end of each sweep. When the Switching Multivibrator is in one state— say, with V585A conducting and V585B cut off— the low plate voltage on

V585A is coupled to the grid of V594B. This cuts off V594B whose plate voltage then rises to about +63 volts, which cuts off the B Channel Switched Amplifiers. The high plate voltage of V585B is coupled to the grid of V594. This allows

V594A to conduct which lowers its plate voltage and the voltage at the cathodes of the A Channel Switched Ampli­ fiers to about +57 volts. Therefore, the A Channel Switched

Amplifiers conduct. When the Switching Multivibrator is in the other state— V585B conducting and V585A cut off— the opposite set of conditions exists; the B Channel Switched

Amplifiers conduct and the A Channel Switched Amplifiers are cut off.

The switching of the Switching Multivibrator in the AL­

TERNATE mode takes place as follows. At the end of each sweep, a positive spike is formed at the screen of V145A in the Time-Base Generator. This positive spike is applied to the grid of the Alternate Trace Sync Pulse Amplifier, V574B, and, since V574B is normally cut off, allows the tube to con­ duct. This allows current to flow also through the Sync Pulse

Coupling Diodes, V572, and applies a negative spike to both grids of the Switching Multivibrator. Since one side of the multivibrator is already cut off, the negative spike will have no effect on that side. However, the negative spike will cut off the side which is conducting and cause the multivibrator to switch states.

When the MODE switch is in the CHOPPED position, V585 becomes an astable multivibrator with a frequency of about

150 kc. The outputs from the two sides of the Switching

Multivibrator are applied to the two sides of the Switching

Amplifier which turns the Switched Amplifiers off and on alternately at a 150-kc rate. This causes the signals in the two channels to be displayed on the crt alternately for a little over three microseconds at a time.

Since the POSITION controls of the two channels are normally set at different levels, it is necessary, in the CHOP­

PED mode, to turn off the crt beam as the switching between channels is taking place. This action takes place in the Chop­ ped Blanking Amplifier, V574A. The negative-going pulses formed as the two sides of the Switching Multivibrator al­ ternately come into conduction are differentiated and ap­ plied as negative spikes to the grid of V574A. V574A am­ plifies and inverts the spikes and applies them to the crt cathode via SW848. These positive spikes on the crt cathode, then, cut off the beam as switching is taking place.

TIME-BASE TRIGGER

The Time-Base Trigger consists basically of the Trigger

Selector switches, SW10A and SW10B, the Trigger Input

Amplifier, V24, and the Trigger Multivibrator, V45. The

TRIGGER SELECTOR switches select the triggering source, the triggering slope, and the triggering mode. The Trigger In­ put Amplifier amplifies (and, when desired, inverts) the in­ coming triggering signal and applies it to the input of the

Trigger Multivibrator. The Trigger Multivibrator is a Schmitt circuit which is switched from one state to the other by the signal at its input. Its square-wave output is differentiated to form negative and positive spikes which are applied to the Time-Base Generator where the negative spikes are used to start the horizontal sweep. The positive spikes are not used.

A block diagram of the Time-Base Trigger is shown in

Fig. 4-4.

4-4

FROM

Circuit Description — Type 5 1 6

TO

TIME-BASE

GENERATOR

Trigger Input Amplifier

The input to the Trigger Input Amplifier, V24, may be se­ lected from any one of three sources by means of the black

TRIGGER SELECTOR control, SW10A. When SW10A is in one of the INT. positions, the signal is obtained from the

Trigger Pickoff circuit in the Vertical Amplifier. When SW10A is in one of the EXT. positions, the signal may be obtained from an external source through the TRIGGER INPUT con­ nector on the front panel. When SW10A is in one of the

LINE positions, the signal is obtained from one of the 6.3- volt secondary windings of the line transformer.

The + and — positions of SW10A provide a means of in­ verting or not inverting, as desired, the triggering signal in the Trigger Input Amplifier. This is done so that the negative spike at the output of the Time-Base Trigger can be made to occur during either a positive-going or a negative-going portion of the triggering signal. (The negative spike occurs only when there is a negative-going signal at the input to the Trigger Multivibrator.)

When SW10A is in any of the —positions, the incoming triggering signal is applied to the grid of V24A, and V24 is a cathode-coupled amplifier. With this configuration, the signal at the plate of V24B (output of the Trigger Input Am­ plifier) is in phase with the incoming triggering signal. When

SW10A is in any of the + positions, the incoming triggering signal is applied to the grid of V24B, and V24B is a plate- loaded amplifier. In this case, the signal at the plate of

V24B is 180° out of phase with the incoming triggering signal.

The TRIGGERING LEVEL control, R17, varies the average dc level at the plate of V24B from about + 60 volts to +100 volts. This is true whether SW10A is in a + position or a

— position. The minimum level of + 60 volts represents the point where V24B is taken into saturation by a sufficiently positive setting of R17 when SW10A is in a — position or by a sufficiently negative setting of R17 when SW10A is in a + position. The maximum level of +100 volts represents

Fig. 4 -4 . Time-Base Trigger block diagram .

the point where V24B is taken into cutoff by a sufficiently negative setting of R17 when SW10A is in a — position or by a sufficiently positive setting of R17 when SW10A is in a + position. As will be seen later, the voltage at the plate of V24B must pass through the approximate center of this range (about + 80 volts) in order to cause the Trigger Multi­ vibrator to change states.

For small triggering signals, R17 is set such that the aver­ age dc level at the plate of V24B is close to the center of its range so that the small signal, as amplified by V24, is sufficient to carry the plate voltage through the +80-volt point. When a large triggering signal is applied and it is desired to trigger on an extreme positive or negative point of it, R17 is set such that V24B is well into saturation, or cut­ off (depending upon whether triggering is desired at a more negative or more positive point on the signal and on a nega­ tive-going or positive-going slope). In this case, the trig­ gering signal must be sufficient to overcome the saturation or cutoff of V24B and produce an additional 20 volts of swing at the plate of V24B in order to cause the Trigger

Multivibrator to switch states.

It should be noted that the voltages given in the foregoing discussion are typical nominals only and will vary somewhat from instrument to instrument and with time.

Trigger Multivibrator

The Trigger Multivibrator is a two-state Schmitt circuit.

When the voltage at its input grid (grid of V45A) is above a certain critical level (neglecting hysteresis), the Trigger

Multivibrator is in one state, with V45A conducting and

V45B cut off. When the Trigger Multivibrator is in this state, the voltage as its output (plate of V45B) is at 300 volts.

When the voltage at the input grid is below the critical level

(still neglecting hysteresis), the Trigger Multivibrator is in the other state, with V45A cut off and V45B conducting. When the Trigger Multivibrator is in this second state, the voltage at its output is about +290 volts. The transition from one

4-5

Circuit Description — Type 5 1 6 state to the other occurs very rapidly regardless of how slowly the voltage at the input grid passes the critical level.

Thus the output of the Trigger Multivibrator is a 10-volt square wave. The negative-going transition occurs when the voltage at the input passes the critical level while moving in the negative direction, and the positive-going transition occurs when the voltage at the input passes the critical level while moving in the positive direction. As mentioned before, only the negative-going transistion is of significance time- wise, and, by means of the black TRIGGER SELECTOR control and the TRIGGERING LEVEL control, this point can be made to coincide with virtually any point on the incoming trig­ gering signal.

The TRIG. LEVEL CENTERING adjustment, R39, varies the level of the grid of V45B with respect to the plate of V45A.

Thus, it controls the input voltage at which the Trigger Multi­ vibrator changes states. This level is normally set at the voltage which the plate of V24B assumes when both grids of

V24 are at ground potential. In most instruments, this is within a volt or two of + 80 volts.

Actually, the input voltage level at which the Trigger

Multivibrator changes states on a negative-going signal is normally slightly lower than the input voltage level at which it changes states on a positive-going signal. The difference between the two input voltage levels at which the two changes in state occur is the hysteresis of the circuit. In order to obtain maximum triggering sensitivity, the hysteresis must be kept as small as possible. To reduce the hysteresis, resistance is introduced between the two cathodes by means of the TRIGGER SENSITIVITY adjustment, R47. Due to the drop across this resistance, the cathode voltage of the non­ conducting tube is moved closer to its grid voltage, so that the grid will not have to move as far to bring the tube into conduction and cause the multivibrator to change states. Too much resistance between the cathodes causes the multivibra­ tor to oscillate during transitions from one state to the other.

As will be seen in the discussion of the Time-Base Genera­ tor, not every negative trigger pulse from the Time-Base

Trigger initiates a sweep. Negative trigger pulses which ar­ rive at the Time-Base Generator during the time that a sweep is in progress will have no effect on the circuit. It is only after a sweep has been completed and all circuits have re­ turned to their quiescent state that the Time-Base Generator will be retriggered by a trigger pulse from the Time-Base

Trigger.

Triggering Mode

The red TRIGGER SELECTOR control, SW10B, selects the type, or mode, of triggering. In the DC position, the trigger­ ing signal is dc-coupled to the Trigger Input Amplifier, which in turn is dc-coupled to the input of the Trigger Multivibrator.

R30 isolates the plate of V24B from the capacitance of the switch; R32 isolates the grid of V45A from the switch. It should be noted that with SW10A in the INT. position, and

SW10B and the appropriate POLARITY switch in the DC po­ sition, complete dc-coupling exists from the input of the Verti­ cal Amplifier to the Trigger Multivibrator.

In the AC position of SW10B, capacitor CIO is connected into the input circuit. This prevents the dc component of the triggering signal from reaching the Trigger Input Amplifier.

The Trigger Input Amplifier, however, is still dc-coupled to the Trigger Multivibrator.

In the AUTO, position of SW10B, the Trigger Multivibrator is converted from a bistable configuration to an astable

(free-running) configuration by the addition of feedback from the grid of V45B to the grid of V45A through R40. In addi­ tion, the dc coupling between the Trigger Input Amplifier and the Trigger Multivibrator is removed when the switch is in the AUTO, position.

To understand the operation of the Trigger Multivibrator in the free-running mode of operation, first assume that V45B is cut off and V45A is just being driven into cutoff by the charge on C31. The voltage at the plate of V45A starts to rise, carrying with it the voltage at the grid of V45B. V45B then starts to conduct, causing a negative step at its plate.

Since the two grids are coupled through R40, the grid of

V45A will start moving positively at the same time as the grid of V45B. However, the time constant of C31 and the resistances in the grid circuit of V45A is such that it takes about 0.01 second for the voltage at the grid of V45A to rise exponentially from its starting point, below cutoff, to a point where the tube will start conducting.

When V45A does start conducting, its plate voltage will drop, carrying with it the grid of V45B. V45B will cut off causing a positive step at its plate. At the same time that the grid of V45B goes negative, the grid of V45A will also start negative. Once again, it will take about 0.01 second for C31 to charge up sufficiently to cut V45A off. When

V45A does cut off, the cycle starts over. Thus, the Trigger

Multivibrator free runs at about 50 Hz.

During the automatic mode of operation, the total voltage change at the grid of V45A is about 3 volts. Since the grid of V45A is never more than 3 volts from cutoff, a triggering signal from the Trigger Input Amplifier with a peak-to-peak amplitude of 3 volts or more can drive the grid to cutoff at any time and produce a trigger output. Smaller signals than

3 volts can drive the V45A grid into cutoff if they occur at a time when the exponentially changing grid voltage is ap­ proaching the cutoff level of the tube (relatively later in the time interval during which V45A is conducting).

Hence, in the absence of any triggering signal, the Trig­ ger Multivibrator free runs at about 50 Hz. However, since the triggering signals are still coupled to the Trigger Multi­ vibrator through C31, virtually any triggering signal over

50 Hz in frequency and of sufficient amplitude will produce synchronized operation of the Trigger Multivibrator. The

50-Hz free-running sweep produced in the absence of a triggering signal provides a base line from which to make voltage measurements and also indicates that the instrument is adjusted to display any signal that might be applied to the input.

The Trigger Multivibrator has a maximum switching fre­ quency of about 5 MHz. Therefore, when it is desired to display signals above that frequency, the Time-Base Trig­ ger is bypassed by placing SW10B in the HF SYNC posi­ tion and the incoming signal is applied directly to the Time-

Base Generator. The STABILITY control is advanced to pro­ duce a free-running sweep and the signal becomes a syn­ chronizing signal, rather than a triggering signal, which synchronizes the free-running sweep to a submultiple of its frequency.

4-6

®1

TIME-BASE GENERATOR

The Time-Base Generator, upon receipt of a negative trig­ ger pulse from the Time-Base Trigger, produces a linearly rising (sawtooth) voltage which is applied through the Hori­ zontal Amplifier to the crt horizontal deflection plates. This causes the spot to move from left to right on the crt screen and form the trace. The amplitude of the sawtooth voltage is about 150 volts. Its rate of rise is controlled by the values of the Timing Capacitor and Timing Resistor switched into the circuit by the TIME/DIV. control on the front panel.

The Time-Base Generator consists of three main circuits; the Sweep-Gating Multivibrator, the Miller Runup Circuit, and the Hold-Off Circuit. The Sweep-Gating Multivibrator con­ sists of V135A, V135B, and V145A. The essential components of the Miller Runup Circuit are: The Miller Runup Tube,

V I61 A; the Runup Cathode Follower, V161B; the Disconnect

Diodes, V152A and V152B; the Timing Capacitor, C160; and

Circuit Description — Type 5 1 6 the Timing Resistor, R160. The Hold-Off Circuit consists of the Hold-Off Cathode Followers, V183A and V183B; the

Hold-Off Capacitor, Cl 80; and the Hold-Off Resistors, R180A and R180B. Also considered a part of the Time-Base Genera­ tor are the Unblanking Cathode Follower, V145B, the +

Gate-Out Cathode Follower, V193A, and the Sawtooth Out

Cathode Follower, V193B.

A block diagram of the Time-Base Generator is shown in

Fig. 4-5.

Sweep Generation

In the quiescent state—that is, when no sweep is being generated— V135A is conducting and V145A is cut off. (The

STABILITY control, R110, or the PRESET STABILITY adjustment,

R ill, whichever'is in the circuit, is set so that the grid of

V135A is just above cutoff voltage.) The plate of V145A is

Fig. 4 -5 . Time-Base G enerator block diagram .

4-7

Circuit Description — Type 5 1 6 at about —2.5 volts with respect to ground. The Disconnect

Diodes are conducting and hold both sides of the Timing

Capacitor at about —2.5 volts. With its cathode grounded and its grid at —2.5 volts, the Miller Runup tube, V161A, is conducting heavily and its plate is at about + 30 volts.

A negative trigger pulse, arriving at the grid of V135A from the Time-Base Trigger, causes the Sweep-Gating Multi­ vibrator to switch rapidly to its other state. That is, V135A cuts off and V145A conducts. V135A is held in cut off after the trigger pulse passes by a rise in voltage at the common cathode connection. As V145A conducts, its plate voltage goes down, cutting off the Disconnect Diodes. When the

Disconnect Diodes cut off, the plates of the Timing Capaci­ tor are no longer held at —2.5 volts, and the Timing Ca­ pacitor starts to charge toward the instantaneous potential difference between the —150-volt supply and the potential at the cathode of V I61B. However, as the lower side of the

Timing Capacitor starts to move in a negative direction, it takes the grid of V I61A with it. This produces a positive swing at the plate of V I61A which is coupled, through B167 and V I61B, to the top of the Timing Capacitor. This increases the voltage to which the Timing Capacitor is trying to charge.

The effect is to “ straighten out” the charging curve by in­ creasing the charging voltage with each increment of charge on the capacitor. The positive swing at the top of the Timing

Capacitor also tends to prevent the lower side from swing­ ing negatively. Since the gain of V161A is about 150, the potential at the top of the Timing Capacitor moves about

150 volts with respect to ground while the potential at the lower side moves about one volt. The result is an extremely linear sawtooth at the cathode of V I61B, which is applied through the Horizontal Amplifier to the horizontal deflection plates of the crt. This sawtooth is also coupled through the cathode follower V193B to the SAWTOOTH OUT connector on the front panel.

Hold-Off Circuit

The Hold-Off Circuit prevents the Time-Base Generator from being triggered following the completion of a sweep until after the Miller Runup Circuit has stabilized in the quie­ scent condition. It does this by holding the grid of V135A positive enough to prevent it from being taken into cutoff by the negative trigger pulses from the Time-Base Trigger.

When no sweep is being generated, the arm of the SWP.

LENGTH potentiometer and, therefore, the grid of V183B are at about —90 volts. Normal operating bias on V183B is about 5 volts, so the Hold-Off Capacitor, C l80 and/or C l81, is charged to about 85 volts. During the sweep, the Hold-

O ff Capacitor discharges to about 45 volts through V183B as a result of the rise in voltage on the grid. At the end of the sweep, the voltage at the grid of V183B drops back to

—90 volts. The cathode tries to follow but is held up by the charge on the Hold-Off Capacitor. The Hold-Off Capacitor starts to charge again exponentially toward 85 volts, carry­ ing the grid of V183A negative. The cathode of V183A and the grid of V135A follow the grid of V183A. When the Hold-

O ff Capacitor charges to the point where V183A cuts off

(V183A is normally cut off between sweeps), it loses control over the grid of V135A, which then returns to the level es­ tablished by the setting of the STABILITY or PRESET STA­

BILITY control.

The amount of hold-off time, then, is determined by the value of capacitance and/or resistance switched into the

Hold-Off Circuit by the TIME/DIV. control. (See the Timing

Switch circuit diagram.) The amount of hold-off time requir­ ed is determined by the sweep rate. For this reason the

TIME/DIV. control changes the time constant of the Hold-

O ff Circuit as well as that of the Timing Circuit.

Sweep Length

The length of the sweep— that is, the distance the spot moves across the crt— is determined by the setting of the

SWP. LENGTH adjustment, R176. As the sweep voltage rises linearly at the cathode of V I61B, there will be a proportion­ ate rise in the voltage at the wiper arm of the SWP. LENGTH adjustment. This rise is coupled through the two Hold-Off

Cathode Followers, V183A and V183B, to the grid of V135A.

When the voltage rises to the point where V135A comes out of cutoff, the Sweep-Gating Multivibrator will rapidly revert to its original state with V135A conducting and V145A cut off. The voltage at the plate of V145A will then rise, carry­ ing with it the voltage at the plates of the Disconnect Diodes.

V152B starts conducting and discharges the Timing Ca­ pacitor. This brings the grid of V I61A quickly back up to its quiescent level. The rise in voltage at the grid causes the tube to conduct more, so the plate voltage drops, carrying with it the grid and cathode of V I61B. When the voltage at the cathode of V I61B returns to about —2.5 volts, V152A conducts, clamping the voltage at this point

The time during which the voltage at the plate of V I61A and the cathode of V I61B drops is the sweep trace in­ terval. The trace is blanked during this time and during the hold-off time following it.

4-8

Sweep Stability

The STABILITY control, R110, (or the PRESET STABILITY adjustment, R ill, depending upon the mode of operation) regulates the dc level at the grid of V135A. This control is adjusted so that the voltage at the grid of V135A is just high enough to hold V135A out of cutoff. When the circuit is adjusted in this manner, a sweep will be produced only when a negative trigger pulse from the Time-Base Trigger drives

V135A into cutoff. Turning the STABILITY control fully clock­ wise (when SW10B is in the DC, AC, or HF SYNC position) places a sufficiently negative voltage on the grid of V135A that V135A cuts off immediately upon decay of the hold-off voltage and initiates the next sweep without a trigger pulse.

The result is a free-running sweep whose period is the total of the sweep time plus the hold-off time at any given setting of the TIME/DIV. control.

Unblanking

The positive rectangular pulse appearing at the cathode of

V135B in the Sweep-Gafing Multivibrator is coupled through the Unblanking Cathode Follower, V145B, to the grid circuit of the crt to unblank the crt during sweep time. This unblanking pulse is also coupled through the cathode follower V193A to the +GATE OUT connector on the front panel.

@

FROM

TIME-BASE

GENERATOR

Circuit Description — Type 5 1 6

TO CRT

HORIZONTAL

DEFLECTION

PLATES

HORIZONTAL AMPLIFIER

The Horizontal Amplifier consists of the Input Cathode

Follower, the Driver Cathode Follower, the Output Amplifier, and the Output Cathode Follower stage. A block diagram of the Horizontal Amplifier is shown in Fig. 4-6.

The sweep waveform is coupled to the grid of the Input

Cathode Follower, V343A, via the frequency-compensated voltage divider, R330-R332. The HORIZONTAL POSITION control, R333A, supplies a manually adjustable dc voltage to the grid of V343A for horizontal positioning of the crt beam.

The C340-R340 network produces a small step at the start of the waveform at the faster sweep rates. This step is necessary to compensate for the bandpass-limiting effect of the stray capacitance in the amplifier. By its application the sweep will start linearly at the faster sweep rates. The Input Cath­ ode Follower provides the necessary low impedance to drive the switch capacitances and the Driver Cathode Follower,

V343B; the Driver Cathode Follower isolates the Output Am­ plifier from the HORIZONTAL DISPLAY switch.

In the MAG. position of the HORIZ. DISPLAY switch, the sweep waveform is coupled by the Driver Cathode Follower directly to the Output Amplifier, V364A-V384A. This stage is a cathode-coupled paraphase amplifier which converts the single-ended input to a push-pull output. The waveform is then coupled by the Output Cathode Follower stage, V364B-

V384B, to the horizontal deflection plates. The MAG. GAIN

ADJ., R259, varies the degeneration in the cathode circuit of the Output Amplifier and thus sets the gain of the stage.

C260 reduces the degeneration at higher frequencies and thus compensates the amplifier for faster sweep rates. Boot­ strap capacitors C364 and C384 also improve the response at the faster sweep rates by supplying current from the out­ put cathode followers to charge the stray capacitance at the plates of the Output Amplifier. Neon lamp B346 is connected in the circuit when the HORIZ. DISPLAY switch is in the

MAG. position to indicate that the magnifier circuits are in operation.

In the NORM, position of the HORIZ. DISPLAY switch, the gain of the amplifier is reduced by a factor of five by nega­

Fig. 4*6. H orizontal A m p lifie r block diagram .

tive feedback. The feedback, from the cathode of V364B, is developed across R225 and R347, which have been switch­ ed into the grid circuit of V343B. When the HORIZ. DISPLAY switch is in the NORM, position, both the MAG. GAIN ADJ.

R259, and the SWP. GAIN ADJ., R225, will vary the gain of the Horizontal Amplifier; for this reason, the MAG. GAIN

ADJ. is adjusted only when the HORIZ. DISPLAY switch is in the MAG. position.

The SWP./MAG. REGIS, adjustment, R358, sets the dc level at the grid of V343B so that the portion of the waveform at the horizontal center of .the graticule will not shift as the

HORIZ. DISPLAY switch is switched between the NORM, and

MAG. positions.

In the EXT. position of the HORIZ. DISPLAY switch, the grid of the Driver Cathode Follower is connected to the EXT.

HORIZ. INPUT connector on the front panel. With this ar­ rangement, the horizontal signal is obtained from an exter­ nal source rather than from the Time-Base Generator. The

HORIZ.-INPUT ATTEN. control, R349 (ganged with the STA­

BILITY control), provides adjustable attenuation of the ex­ ternally applied signal. Horizontal positioning is provided by R333B rather than R333A when the HORIZ. DISPLAY switch is in the EXT. position.

Placing the HORIZ. DISPLAY switch in the EXT. position also disables the Time-Base Generator by opening the cath­ ode circuit of the Sweep-Gating Multivibrator.

POWER SUPPLY

Plate and filament power for the tubes in the Type 516

Oscilloscope is furnished by a single transformer, T601. The primary has two equal tapped windings which are connected in parallel for 117-volt operation or in series for 234-volt operation. Two auxiliary windings are also provided to furnish aiding or bucking currents, as desired, for certain other primary source voltages (see Section 2).

The three main full-wave power supplies furnish regulated voltages of —150, +100, and +300 volts. The +300-volt supply also has an unregulated output of about 400 volts

4-9

Circuit Description — Type 5 1 6 for the high-voltage supply for the crt. It is unnecessary to regulate this supply as the high-voltage supply has its own regulating circuit.

Reference voltage for the —150-volt supply is established by a gas diode, VR tube V609. This tube, which has a con­ stant voltage drop, establishes a fixed potential of about

—84 volts at one grid of the Difference Amplifier, V634. The grid potential for the other half of the Difference Amplifier is obtained from a voltage divider consisting of R615, R616 and R617. The setting of the —150 ADJ., R616, determines the percentage of the total output voltage that appears at the grid of V634B and thus determines the total voltage across the divider. When this adjustment is properly set, the output voltage of the —150-volt supply will lie somewhere between

—147 volts and —153 volts.

Should the loading on the supply tend to change the out­ put voltage, the potential at the grid of V634B will change in proportion, and an error voltage will exist between the two grids of the Difference Amplifier. The error signal is amplified by V634A, whose plate is dc-coupled to the grid of the Series Tube, V627. The error voltage appearing at the grid of V627 will change the bias and, hence, the effec­ tive resistance of V627. This will allow more or less current, as required, to flow through the load to bring the output voltage back toward its original level. C617 improves the ac gain of the feedback loop, and thus increases the response of the circuit to sudden changes in output voltage.

The —150-volt supply serves as a reference for both the

+ 100-volt and +300-volt supplies. In the -f 100-volt supply, the voltage divider R650-R651 establishes a voltage of es­ sentially zero at the grid of the Amplifier, V654. (The actual voltage at this grid will be equal to the bias voltage required by the tube.) If the loading should tend to change the out­ put voltage, an error voltage will appear at the grid of the amplifier. The error voltage will be amplified and will ap­ pear at the grid of the Series Tube, V667A. The cathode of V667A will follow the grid, and thus the output voltage will be returned to its established value of +100 volts. C650 improves the response of the regulator circuit to sudden changes in output voltage.

A small sample of the unregulated-bus ripple will appear at the screen of V654 through R657. This ripple signal ap­ pearing at the screen (which acts as an injector grid) will produce a ripple component at the grid of V667A which is opposite in polarity to the ripple appearing at the plate of

V667A. This tends to cancel the ripple at the cathode of

V667A, and hence reduces the ripple on the +100-volt bus.

This same circuit also improves the regulation of the circuit in the presence of line voltage variation.

The +300-volt supply functions in the same manner as the +100-volt supply. Rectified voltage from terminals 8 and 9 of the power transformer is added to the voltage supplying the +100 volt regulator to supply power for the

+300-volt regulator. As mentioned previously, the +300-volt supply also provides an unregulated output of about 400 volts for the crt high-voltage supply.

CRT CIRCUIT

A 60-kHz Hartley oscillator circuit furnishes energy for the three power supplies that provide accelerating voltages for the crt. The main components of the oscillator are V800 and the primary of T801 tuned by C808.

The rectifier circuits are the half-wave type, with capaci­ tor-input filters. Separate supplies are required for the grid and cathode circuits in order to provide dc-coupled un­ blanking to the grid supply.

V822 supplies —1675 volts for the cathode of the crt.

V842 supplies +2325 volts for the post-anode acceleration.

This provides an accelerating voltage of 4000 volts for the crt beam. V832 supplies about —1750 volts for the grid of the crt (the actual voltage depends upon the setting of the

INTENSITY control, R826).

In order to maintain a constant deflection sensitivity in the crt, and thereby maintain the calibration of the oscilloscope, it is necessary that the accelerating potentials in the crt re­ main constant. This is accomplished by regulating the three supplies by comparing a "sample'' of the high voltage to the regulated —150-volt supply. The "sample" voltage, obtained from the arm of the HV ADJ., R841, is applied to the grid of

V814B; the cathode of this tube is connected to the regulated

-150-volt supply. The error signal is amplified by V814B and V814A; the output of V814A varies the screen voltage of the oscillator tube, thereby controlling the amplitude of its output.

Unblanking

As mentioned previously, dc-coupled unblanking is ac­ complished by employing separate high-voltage supplies for the grid and cathode. The cathode supply is tied to the

+ 100-volt supply via the decoupling network, R801-C801A.

The grid supply, on the other hand, is not tied to any other supply, and is therefore "floating". The unblanking pulses from the Time-Base Generator are transmitted to the grid of the crt via the floating grid supply.

The stray capacitance in the circuit makes it difficult to move the floating supply fast enough to unblank the crt in the required time. To overcome this, an isolation network composed of C827, R827, and R828 is employed. By this arrangement, the fast leading edge of the unblanking pulse is coupled directly to the grid of the crt via C827. For short- duration unblanking pulses (at the faster sweep rates), the power supply itself is not appreciably moved. For longer unblanking pulses (at the slower sweep rates), however, the stray capacitance of the circuit is charged through R827.

This holds the grid at the unblanked potential for the dura­ tion of the unblanking pulse.

AMPLITUDE CALIBRATOR

The Amplitude Calibrator is a square-wave generator whose output is available at the CAL. OUT connector on the front panel. It consists of an astable multivibrator, V885A and V875, connected so as to switch the Cal. Out Cathode

Follower, V885B, between two operating states, cutoff and conduction, at approximately 1 kHz.

During the negative portion of the multivibrator waveform, the grid of V885B is driven well below cutoff and the cath­ ode rests at ground potential. The CAL. ADJ. potentiometer,

R879, is adjusted so that the voltage at the cathode of V885B

(CAL. TEST PT.) rises to exactly +100 volts during the posi­ tive portion of the mutivibrator waveform. The tapped cath­ ode resistor provides eleven calibrated outputs, from 0.05 volt to 100 volts, which are used for calibrating the gain of the Vertical Amplifier attenuator probes.

a n d a d ju stin g the com pensation o f

M A I N T E N A N C E

Preliminary Instructions

PREVENTIVE MAINTENANCE

Visual Inspection

Every few months, the oscilloscope should be visually in­ spected for possible circuit defects. These defects may include such things as loose or broken connections, damaged binding posts, improperly seated tubes, scorched wires or resistors, missing tube shields, and broken terminal strips. For most visual troubles the remedy is apparent; however, particular care must be taken when heat-damaged components are detected. Overheating of parts is often the result of other, less apparent, defects in the circuit. It is essential to de­ termine the cause of overheating, before replacing heat- damaged parts, in order to prevent further damage.

Fan Motor

The bearings in the fan motor are sintered bronze oilite bearings and do not require oiling.

REMOVAL AND REPLACEMENT OF PARTS

General Information

Procedures required for replacement of most parts in the

Type 516 Oscilloscope are obvious. Detailed instructions for their removal are therefore not required. Other parts, how­ ever, can best be removed if a definite procedure is followed.

Instructions for the removal of some of these parts are con­ tained in the following paragraphs. Parts ordering informa­ tion is included in the Parts List Section.

Because of the nature of the instrument, replacement of certain parts will require recalibration of sections of the oscilloscope to insure proper operation.

Calibration

The Type 516 Oscilloscope is a stable instrument which should provide many hours of trouble-free operation. How­ ever, to insure the reliability of measurements we suggest that you calibrate the instrument after each 500 hours of operation (or every six months if used intermittently). A complete step-by-step procedure for calibrating the instru­ ment is presented in Section 6 of this manual.

Air Filter

The Type 516 Oscilloscope is cooled by forced, filtered air. This instrument is equipped with a washable air filter, constructed of aluminum wool coated with an adhesive. If the filter becomes dirty it may restrict the flow of air and cause the instrument to overheat. The filter should be in­ spected, and cleaned or replaced if necessary, every three to four months.

To remove the loose dirt, the filter may be rapped gently on a hard surface. It should then be rinsed briskly, from the dirty side, with hot water. Or, if preferred, it may be wash­ ed with hot, soapy water. After rinsing and drying, the filter should then be coated with “ Handi-Coater" or "Filter- coat", products of the Research Products Corporation. These products are generally available from air-conditioner sup­ pliers.

Removal of Side Panels

The side and bottom panels of the Type 516 Oscilloscope are held in place by small screwhead fasteners. To remove the panels, use a screwdriver to rotate the fasteners approx­ imately two turns counterclockwise and pull the panels away from the instrument (see Fig. 5-1). In replacing the side panels, be sure that they are fitted properly at the bottom before fitting the top portion into place. The two side panels are perforated differently to promote proper air flow within the instrument. They should not be interchanged. Fig. 2-2 shows the two side panels correctly mounted.

Replacement of the Cathode-Ray Tube

To remove the cathode-ray tube, first disconnect the tube socket and the five leads connected to the neck of the tube.

Remove the graticule cover, spacer washers, graticule, and graticule light shield. Loosen the tube clamp at the base of

5-1

Maintenance — Type 5 1 6

Fig. J.1 Removing the oscilloscope li d * panels.

the crt. Removo tho crt by pushing forward on the tube base and then pulling the tube straight out through the front panel (see Fig. 5-2).

When the new crt is in place, the leads con be properly connected to tho neck of the tube by following the color code information provided on the tube shield. After replace­ ment of the crt, it moy be necessary to calibrate certain portions of the oscilloscope. Special attention should be given to calibration of tho sweep timing and the Vertical

Amplifier gain.

Replacement of Switches

Methods for removal of defective switches ore, for the most part, obvious and only a normal amount of core is re­ quired. Single wafers are normally not replaced on the switches used in the instrument, If one wofer is defective, the entire switch should be replaced. Switches can be order­ ed from Tektronix either wired or unwired, os desired

Tube Replacement

Care should be taken both in preventive and corrective maintenance that tubes are not replaced unless they ore ac­ tually causing trouble. Often during routine maintenance it will be necessary to remove tubes from their sockets. It is important that these tubes be returned to their original sock­ ets unless they are actually defective Unnecessary replace­ ment or switching of tubes will often necessitate calibration of the instrument. If tubes do require replacement, it is rec­ ommended that they be replaced by previously checked, high-quality tubes

Soldering Precautions

In the production of Tektronix instruments, a special silver­ bearing solder is used to establish o bond to the ceramic

Fig 3 -2 . (( m o v in g th * co lh o d e -ro y Ivb# terminal strips This bond con be broken by repeated use of ordinary tin-lead solder, or by the application of too much heat. However, occasional use of ordinary solder will not break the bond if too much heat is not applied.

It is advisable to have a stock of solder containing about

3% silver if you frequently perform work on Tektronix instruments. This type of solder is used frequently in printed circuitry and should be readily available. It may also be purchased directly from Tektronix in one-pound rolls (order by Tektronix Part Number 251-05M-00).

Because of the shape of the terminals on the ceramic terminal strips, it is advisable to use a wedge-shaped tip on your soldering iron when installing or removing parts from the strips. A wedge-shaped lip allows you to apply heat directly to the solder in the terminals and reduces tho amount of heat required. It is important to use as little heat as pos­ sible.

Ceramic Terminal Strips

Damaged ceramic terminal strips are most easily removed by unsoldering all connections, thon using a plastic or hard

Chassis

Ceramic Strip

Spacer Yoke Pin

Fig. 5 -3 . In s ta lla t io n o f c o ra m k te rm in a l s trip *.

Yoke

5 - 2

rubber mallet to knock the yokes out of the chassis. This can be done by pounding on the ends of the yoke protrud­ ing through the chassis. This removes both the strip and the yoke assembly.

When the damaged strip and yoke assembly have been removed, place the spacers for the new strip into the holes in the chassis. Snap the ceramic strip into the yokes and

Maintenance — Type 5 1 6 place the tip of the yoke pins into the spacers. Using a plastic or hard rubber mallet, tap the ceramic strip lightly above the yokes to drive the yoke pins down through the spacers. Be certain that the yoke pins are driven completely through. Using a pair of diagonal cutters, cut off the ex­ cess length of the yoke pins protruding beyond the spacers.

Fig. 5-3 illustrates the way that the parts fit together.

T roubleshooting

The Troubleshooting section is divided into two parts, Cir­ cuit Isolation and Circuit Troubleshooting. When a trouble occurs in the instrument, refer first to the Circuit Isolation section for instructions on how to isolate the trouble to a given circuit. After determining which circuit is at fault, re­ fer to the Circuit Troubleshooting section, where procedures for troubleshooting each circuit are given. Before attempting to troubleshoot the Type 516 Oscilloscope, however, make sure that any apparent trouble is actually due to a malfunc­ tion within the instrument and not due to improper control settings. Operating instructions are contained in Section 3 of this manual.

Apparent trouble may be due to improper calibration of one or more circuits. One of the first steps in any trouble­ shooting procedure should be to check the calibration of the suspected circuit.

Power-supply output voltages should be checked whenever any type of trouble occurs in the instrument. Due to the cir­ cuit configurations employed in the Type 516, it is possible for an incorrect power-supply voltage to affect one circuit more than others. When all but one circuit in the oscillo­ scope is functioning properly, there is a tendency to overlook the Power Supply as a source of the trouble and to concen­ trate on the circuit where the trouble apparently exists. In cases of this type, valuable time may be saved by checking the power supplies first. If the output and ripple voltages of the regulated power supplies are correct, the power sup­ plies can be assumed to be operating correctly.

When the trouble has been isolated to a definite circuit, perform a complete visual check on that circuit. Many trou­ bles can be found easily by visual means. If the visual check fails to reveal the cause of the trouble, check the tubes by substitution. Do not depend on tube testers to adequately indicate the suitability of a tube for use in the instrument.

The criterion for usability of a tube is whether or not it works satisfactorily in the instrument. Be sure to return good tubes to the same sockets from which they were removed.

Separate circuit diagrams for each circuit are contained in the Diagrams section of this manual. In addition, a block diagram provides an overall picture of instrument operation.

The reference designation of each electronic component of the instrument is shown on the circuit diagrams. The follow­ ing chart lists the reference designation numbers associated with each circuit.

All numbers less than 100

All 100 numbers

All 200 and 300 numbers

All 400 and 500 numbers

All 600 numbers

All 800 numbers

Time-Base Trigger

Time-Base Generator

Horizontal Amplifier

Vertical Amplifier

Power Supply

Crt Circuit and

Calibrator

Switch wafers shown in the circuit diagrams are coded to indicate the position of the wafer on the switch. The number portion of the code refers to the wafer number on the switch assembly. Wafers are numbered from the front of the switch to the rear. The letters F and R indicate whether the front or the rear of the wafer is used to perform the particular switching function.

CIRCUIT ISOLATION

This portion of the Troubleshooting procedure lists some of the troubles that can be caused by a circuit failure in the

Type 516 Oscilloscope. It also describes checks that can be made to isolate the faulty circuit or circuits. In some cases simple front panel checks con determine which circuit is de­ fective, but in other cases internal checks and/or measure­ ments are required.

The crt display can often be used to isolate the trouble to one particular circuit. If there is no vertical deflection, for example, when the intensity and horizontal deflection ap­ pear to be normal, an open condition probably exists in the Vertical Amplifier and this circuit should be investigated first.

5-3

Maintenance — Type 5 1 6

Although the Type 516 Oscilloscope is a complex instru­ ment, it can be thought of as consisting of six main circuits in addition to the Calibrator Circuit. These are:

1. Power Supply

2. Crt Circuit

3. Time-Base Generator

4. Time-Base Trigger

5. Vertical Amplifier

6. Horizontal Amplifier

Whenever any trouble occurs in the instrument, first check the voltages at the points shown in Fig. 6-4, at the —1675- and -(-2325-volt checkpoints at the top rear of the instru­ ment, and at the center arm of the INTENSITY potentiometer,

R826. If all of these voltages are approximately as indicated

(the voltage at the center arm of the INTENSITY potentio­ meter should be about —1700 volts when the INTENSITY control is set fully clockwise), proceed to the troubleshooting procedures described under the appropriate symptom. If the low voltages (—150, +100, and +300) are not as in­ dicated, refer to the paragraphs on Troubleshooting the

Power Supply. If the low voltages are as indicated but the high voltages (—1675, +2325, and INTENSITY potentio­ meter voltage) are not, refer to the paragraphs on Trouble­ shooting the Crt Circuit.

WARNING

Be careful o f the power-supply voltages. The low- voltage Power Supply can cause more harm than the high-voltage supply (in the CRT Circuit) due to the higher current capabilities o f the circuit. When you reach into the instrument to measure the v o lt­ age, do not touch the metal frame. If possible, stand on an insulated surface and use insulated tools and measuring probes.

The following troubleshooting information is divided ac­ cording to the symtoms presented to the operator. Upon detecting an apparent trouble, use the symptoms to deter­ mine which circuit is at fault. Then refer to the Circuit

Troubleshooting information, where the procedure for trou­ bleshooting within the circuit is given.

procedure given in the Calibration section of this manual.

If a trace is not obtained, or if it is not possible to set the control as described, turn to the instructions for trouble­ shooting the Vertical Amplifier later in this section of the manual.

If only two spots are present when the controls are set as described in the previous paragraph, and the spots can be moved with the HORIZONTAL POSITION control, then the trouble is in the Time-Base Generator. If the spots can­ not be moved with the HORIZONTAL POSITION control, then the trouble is in the Horizontal Amplifier.

If no spot or trace at all is present on the face of the crt, the trouble may be in the Power Supply, the Vertical

Amplifier, the Horizontal Amplifier, the Time-Base Genera­ tor, or the Crt Circuit. To determine which circuit is at fault in this case, set all POSITION controls to midrange, the

HORIZ. DISPLAY switch to the EXT. position, and turn the

INTENSITY control clockwise. If a spot now appears on the screen, either the Time-Base Generator or the first stage of the Horizontal Amplifier is at fault.

If a spot does not appear, short the vertical deflection plates together at the neck pins of the crt.

CAUTION

Be careful not to short the deflection plates to the metal shield around the crt, or to the GEOM. neck pin. Also be ready to turn the INTENSITY control down quickly when a spot does appear so as not to burn the crt screen.

If a spot now appears on the screen, either the Vertical

Amplifier or the Delay Line is at fault. If no spot appears, remove the shorting strap from the vertical deflection plate pins and short the horizontal deflection plates together. If a spot now appears, the trouble is in the Horizontal Am­ plifier.

If no spot or trace appears during any of the previous checks, a defect in the Crt Circuit, possibly in the crt itself, is indicated.

Insufficient or No Vertical Deflection, or W ave­ form Distortion

These troubles are all caused by a defective Vertical

Amplifier and/or Delay Line. Refer to the instructions for troubleshooting these circuits. If there is reduced deflection sensitivity both vertically and horizontally, the trouble is probably in the Crt Circuit.

No Trace on the Crt Screen

Normally, you should obtain two traces on the crt screen when the STABILITY control is set for a free-running sweep

(fully clockwise), the MODE switch is set to the ALTERNATE position, the HORIZ. DISPLAY switch is set to NORM., and the POSITION controls are set to about midrange. If one of the two traces is missing under these conditions, there is an unbalance in the vertical input channel for which there is no trace. (The channel which controls the displayed trace can be determined by noting which VERTICAL POSITION control moves the trace up and down.) In this case, adjust the DC BAL. control of the faulty channel. If the trace is obtained, try to set the DC BAL. control according to the

5-4

Insufficient Horizontal Deflection

This condition can be produced by the Time-Base Genera­ tor or the Horizontal Amplifier.

The operation of the Time-Base Generator can be checked from the front panel. Set the HORIZ. DISPLAY switch to the

NORM, position, the TIME/DIV. switch to .5 SEC, and adjust the STABILITY control for a free-running sweep (fully clock-

wise). Connect a voltmeter between the SAWTOOTH OUT connector and ground. If the voltage varies between zero and +150 volts ± 1 5 % , as the Miller circuit runs up and back, the Time-Base Generator is operating correctly. This means that the trouble is in the Horizontal Amplifier. No voltage variation at this point, or a variation of significantly less than 150 volts, indicates trouble in the Time-Base Gen­ erator circuit.

Nonlinear Horizontal Sweep

The linearity of the horizontal deflection circuit can be checked by connecting a marker generator or the Calibra­ tor output to the Vertical input of the oscilloscope. Set the

MODE switch to correspond to the Vertical Channel being used, and adjust the Time-Base controls for a stable display.

If the displayed markers, or the square waves produced by the Calibrator, are not symmetrically spaced across the crt, a nonlinear sweep is indicated. This condition can be caused by nonlinear amplification in the Horizontal Amplifier, or by the generation of a nonlinear sawtooth in the Time-Base

Generator.

To determine which circuit is at fault, connect a jumper wire from one of the Vertical input connectors to the SAW­

TOOTH OUT connector.

CAUTION

To avoid shorting the 150-volt sawtooth to the chassis, connect the jumper wire to the input con­ nector before connecting it to the SAWTOOTH

OUT connector.

Set the appropriate VOLTS/DIV. switch to 20, and adjust the STABILITY control for a free running sweep (fully clock­ wise). If the TIME/DIV. control is set to a rate of 1 mSEC or faster, a steady diagonal trace will be seen on the crt. This trace is the sweep portion of the sawtooth voltage produced by the Time-Base Generator. If the slope of the trace is constant, the nonlinearity is being produced in the Time-Base

Generator. If the slope of the trace is not constant, the non­ linearity is being produced in the Horizontal Amplifier. Re­ fer to the instructions for troubleshooting the Horizontal Am­ plifier.

Maintenance — Type 5 1 6

Improper Triggering

The most probable cause of poor triggering (as compared with no triggering at all) is lack of calibration of the Time-

Base Trigger. The first thing to check in the event of poor or erratic triggering, then, is the calibration of the Time-

Base Trigger. Procedures for calibration are given in Sec­ tion 6.

If the oscilloscope will not trigger at all, and yet a free- running trace can be produced by turning the STABILITY control fully clockwise, trouble exists in the Trigger Pickoff circuit of the Vertical Amplifier or in the Time-Base Trigger itself. If only the internal triggering is absent, the trouble is in the Trigger-Pickoff circuit or in SW10A in the Time-

Base Trigger. If all triggering (internal, external, and line) is absent, then the trouble is in the Time-Base Trigger.

If stable triggering cannot be obtained and the free-running trace cannot be turned off with the STABILITY control, the trouble lies in the Sweep-Gating Multivibrator of the Time-

Base Generator.

CIRCUIT TROUBLESHOOTING

This portion of the Troubleshooting procedure contains information for locating a defective stage within a given circuit. Once the stage at fault is known, the component or components causing the trouble can be located by tube and component substitution or by voltage and resistance meas­ urements.

Tube failure is the most prevalent cause of circuit failure.

For this reason, the first step in troubleshooting any circuit is to check for defective tubes, preferably by direct substitution.

If replacement of a defective tube does not correct the trouble, then check to see whether components, through which the tube draws current, have been damaged. Shorted tubes will often overload plate-load and cathode resistors.

These components can often be located by a visual inspection of the circuit. If damaged components are not apparent, it will be necessary to make measurements or other checks within the circuit to locate the trouble.

Improper Sweep Timing

If the sweep timing is off in some, but not all, positions of the TIME/DIV. control, one of the timing resistors or timing capacitors has changed in value. By comparing the switch positions in which the timing is incorrect with the Timing

Switch diagram, you will be able to tell which components are common to these positions.

If the timing is off in all positions of the TIME/DIV. con­ trol, the Horizontal Amplifier is probably the circuit at fault.

However, it is important that the Power Supply voltages be checked first. Check to see if the timing circuits can be cali­ brated in accordance with the instructions presented in the

Calibration section of this manual. If the circuits cannot be adjusted for correct timing, then refer to the instructions for troubleshooting the Horizontal Amplifier.

Troubleshooting the Power Supply

Proper operation of every circuit in the Type 516 Oscil­ loscope depends upon proper voltages from the Power Sup­ ply. The voltages must remain within their specified toler­ ances for the instrument to maintain its calibration.

The regulated supply voltage busses are identified by color-coded wires, following the standard color code. The

— 150-volt bus is coded brown-green-brown; the +100-volt bus is coded brown-black-brown; and the +300-volt bus orange-black-brown. The widest stripe always identifies the first color in the code.

No Output V oltage. If there are no output voltages from the Power Supply, note whether the graticule lamps are lighted. If they are, then the trouble is in the Power Supply.

5-5

Maintenance — Type 5 1 6

If the graticule lamps are not lighted and the fan is not going, check the power cord connections, the fuse, and the source of power. If your instrument is wired for 220-, 234-, or 248-volt operation, also check the Thermal Cut-Out Switch by checking the continuity through it with an ohmmeter. If your instrument is wired for 110-, 117-, or 125-volt operation and the fan is running but the graticule lamps are not lighted, check the Thermal Cut-Out Switch. If none of the above checks reveals the trouble, then the primary of T601 is prob­ ably open.

Failure to Regulate a t the Correct Voltage. If any of the supplies fail to regulate, the first thing to check is the line voltage. The supplies are designed to regulate at line voltages between 105 and 125 volts at a nominal line volt­ age of 117 volts and within proportionate limits at the other nominal line voltage for which the instrument can be wired.

Improper line voltages may cause the supply voltages to be off.

If the line voltage is the correct value, the next step is to turn the instrument off and measure the resistance be­ tween the Power Supply test points, shown in Fig. 6-4, and ground. The —150-volt test point should measure approxi­ mately 4500 ohms to ground, the + 100-volt test point should measure approximately 4000 ohms to ground, and the

+300-volt test point should measure approximately 12,000 ohms to ground.

If these values check out, the next step is to check the tubes. Then check the rms voltage across each secondary winding of the transformer. The voltage between terminals

8 and 9 should be about 195 volts ac; between terminals 15 and 16, about 125 volts ac; and between terminals 5 and 6, about 180 volts, ac. If these voltages are correct, check the rectified voltage at the input to each regulator. The voltage at the plate of V667 should be about +410 volts; at the plate of V667A, about +175 volts; and at the plate of V627, about +72 volts. If these voltages are all correct, check for open or leaky capacitors and improper resistance values, especially in the dividers. If it becomes necessary to adjust the —150 ADJ. potentiometer, it will be necessary to recali­ brate the instrument.

The material that follows may be used as a quick index to troubleshooting the low voltage Power Supply.

If the output voltage is high with excessive ripple, check:

1. For high line voltage.

2. The amplifier tubes (V634, V654, V674).

3. For insufficient loading.

(Proper loading of the supplies can be checked by mea­ suring the voltage drop across the 10-ohm resistors, R640,

R642, and R644, in each supply. With the AMPLITUDE CALI­

BRATOR control set to OFF and the STABILITY control set so that no sweep is being produced (counterclockwise but not to PRESET), the drop across the resistors should be as follows: R640, 1.65 volts ±0.1 volt; R642, 1.4 volts ±0.1 volt; R 644,1.75 volts ± 0 .1 volt.)

If the output voltage is high with normal ripple, check for proper resistance values in the dividers (R615, R616, and

R617; R650 and R651; R670 and R671).

5-6

If the output voltage is low with excessive ripple, check:

1. For low line voltage.

2. The series tubes (V667, V627).

3. For excessive loading.

4. Open or leaky filter capacitors.

5. Bad diode rectifiers.

If the output voltage is low with normal ripple, check:

1. The resistance values in the dividers.

2. The capacitors across the dividers.

Troubleshooting the CRT Circuit

If the trouble has been isolated to the Crt Circuit, first check the voltages at the —1675-volt test point and the

+2325-volt test point at the top rear of the oscilloscope. If there is no voltage at either of these points, remove the high-voltage shield containing the two test point openings.

WARNING

Always turn the instrument o ff before removing or replacing either high-voltage shield.

Check for heater glow in the three high-voltage rectifier tubes, V822, V832, and V842. If there is no heater glow in any of these tubes, the high-voltage oscillator circuit is not oscillating. If there is heater glow in any or all of the three rectifier tubes, measure the voltage at the grid of the Oscil­ lator tube, V800. If this voltage is about —55 volts, the oscil­ lator is operating properly. If it is significantly less than —55 volts, the oscillator is not operating properly.

If the oscillator is not operating properly, and replacement of V814 and V800 does not correct the trouble, check the other components associated with the circuit, including the primary and secondary of T801.

If there is no voltage at either of the high-voltage test points, but the high-voltage Oscillator is found to be oper­ ating properly, then the trouble lies in the secondary of T801 or in one of the high voltage rectifiers. If this is the case, measure the voltage at the plate of V832. (This is the high- voltage rectifier tube nearest the centerline of the instrument; the plate is the connection at the forward end of the tube.)

The voltage at this point should be in the vicinity of —1775 volts. If it is not, then trouble exists in some part of the cir­ cuit common to all three high-voltage supplies. If the volt­ age at the plate of V832 is in the vicinity of —1775 volts, then trouble exists in some part of the circuit peculiar to the

—1675- and +2325-volt supplies.

If there are voltages present at the —1675-volt test point and the +2325-volt test point, but they are not of the proper value and cannot be brought to the proper value by ad­ justment of the HV ADJ. (R841), the regulator circuit (V814) is probably faulty, or the supply is being loaded down by a short somewhere in the circuit.

If the high-voltage supplies are normal but no spot is visible on the crt, check the continuity of the cathode circuit.

Also, check the ASTIGMATISM control, R864, for proper re-

sistance and voltage. It a badly distorted spot or trace is visible on the crt, check the GEOMETRY ADJ. adjustment,

R861, and its connection to the neck pin on the crt.

If the Crt Circuit checks out satisfactorily, but trouble still exists, replace the crt.

Troubleshooting the Vertical Amplifier

No Spot or Trace. If a trace or spot is visible when the vertical deflection plates are externally shorted together, but disappears when the short is removed, the vertical de­ flection system is in a state of dc unbalance. This could be caused by an open inductor in one side of the Delay Line, by an open peaking coil in the Vertical Amplifier, or by a faulty tube. To check for this condition, short the plates of the Output Amplifier together (V464 pin 6 and V474 pin 6).

If the trace does not appear, one side of the circuit, between the Output Amplifier and the crt, is open. A continuity check with an ohmmeter is perhaps the best way to deter­ mine which side is open.

If the trace does appear, however, when the plates of the

Output Amplifier stage are shorted together, the circuit is all right between this point and the crt. This means that the trouble lies somewhere ahead of the plate circuit of the Out­ put Amplifier. Short the grids of the Driver Cathode Follow­ er stage together (pins 2 and 7 of V463). If a trace does not appear, the trouble is in the Driver Cathode Follower stage or in the grid circuit of the Output Amplifier. Check tubes, peaking coils, resistors, and capacitors in the circuit.

If a trace does appear when the grids of the Cathode

Follower are shorted together, check L455, L555, R455, and

R555 in the grid circuit of the Driver Cathode Follower.

If a spot or trace appears on one vertical channel and not on the other, a dc unbalance condition exists in the de­ fective channel. In this case, set the MODE switch to cor­ respond to the defective vertical channel and use a shorting strap as follows to locate the defective stage. Short between corresponding points on opposite sides of the circuit, starting at the plates of the Switched Amplifier, V454 or V554, and working back toward the input connector. When a point is reached where the trace no longer appears as opposite sides of the circuit are shorted together, the stage immediately following this point is the stage in which the unbalance is being produced. (When the grids of the Input Amplifier or the cathodes of the Input Cathode Follower are shorted to­

Maintenance — Type 5 1 6 gether, the VERTICAL POSITION control may have to be adjusted to bring the trace into view.) The trouble may be a defective tube, a shorted capacitor, a defective resistor, or a broken lead.

Insufficient or No Vertical Deflection. Insufficient verti­ cal deflection indicates a change in the gain of the Vertical

Amplifier. If the change is slight, the Vertical Amplifier can usually be recalibrated to allow for it. Refer to Section 6 of this manual for this procedure.

If the change in gain is more pronounced, or if there is no vertical deflection at all, check the tubes first. Then check components which can affect the gain but not the dc balance of the circuit; for example, the VARIABLE controls, the GAIN ADJ. potentiometer, plate-dropping resistors R422,

R522, R432, R457, and R489, and the screen resistor, R468.

If gain trouble exists in only one vertical channel, then one of the first two stages (Input Cathode Follower or Input

Amplifier) is probably at fault. If the gain trouble exists in both vertical channels then a Driver Cathode Follower and/or the Output Amplifier is probably at fault.

W aveform Distortion. Waveform distortion can be di­ vided into two categories— low frequency and high frequen­ cy. High-frequency distortion normally appears as "over­ shoot" or “ undershoot’.' at the leading edge of a high- frequency square wave, while low-frequency distortion is normally characterized by a "tilt" to the top and bottom of a low-frequency square wave.

The first thing to check, if waveform distortion is detected, is the adjustment of the probe. The procedure for adjusting a probe is described in Section 3 (see Fig. 3-2).

Faulty tubes are the most common cause of low-frequency distortion. Even though the vertical deflection system is de­ coupled from the attenuators to the crt, if certain tubes (de­ pending on their grid circuits) start drawing grid current, a time-constant network can be established which will affect the low-frequency response of the circuit. If low-frequency distortion is observed, change the tubes in the suspected circuits.

Three types of high-frequency distortion are illustrated in

Fig. 5-4. Insufficient high frequency peaking, which limits the risetime and consequently the bandwidth, will produce the “ undershoot” type of distortion shown in Fig. 5-4 (a).

This condition can be caused by tubes, particularly when

Fig. 5 -4 . Three types o f high-frequency disto rtion. A 450-kH z square wave w ith a risetime o f less tha n 0 .0 2 0 microsecond was used fo r these pictures.

5-7

Maintenance — Type 5 1 6 used as cathode followers working into peaking circuits.

Shorted, or partially shorted, peaking coils are another com­ mon source; hot solder spilled on a peaking coil can cause this condition.

An "overshoot" such as shown acccentuated in Fig. 5-4 (b), is the result of excessive high-frequency peaking. This can be caused by a type of tube distortion known as cathode interface. The first thing to check, therefore, for this type of distortion is the tubes. If tube replacement does not correct the trouble, the variable peaking coils in the Vertical Am­ plifier may need adjusting. Refer to the Calibration section of this manual for the adjustment procedure.

The "wrinkle" condition, illustrated in Fig. 5-4 (c), is pro­ duced by an improperly adjusted Delay Line. Refer to the

Delay Line Adjustment procedure in the Calibration section.

Improper Triggering. If the Time-Base Generator trig­ gers normally in the EXT. and LINE position (+ or —), but does not trigger properly in the INT. position, a defect in the Trigger Pick-Off Circuit is indicated. In this case, the trouble would be either a defective Trigger Cathode Follow­ er, V493, or a defective resistor in the circuit.

Troubleshooting the Time-Base Trigger

If the sweep cannot be triggered, and if the Trigger-

Pickoff circuit in the Vertical Amplifier has been eliminated as the source of trouble, the Time-Base Trigger is at fault.

(This assumes that the trace can be turned on and off with the STABILITY control.) The first thing to do is to replace both tubes in the Time-Base Trigger and try to recalibrate the circuit according to the procedure given in the Calibra­ tion section of this manual. If this does not correct the trouble, then trouble in the circuitry is indicated.

To check the quiescent state of the circuit, set the red

TRIGGER SELECTOR control to AC, the black TRIGGER SE­

LECTOR control to —INT., and the TRIGGERING LEVEL con­ trol to 0. Next, connect a jumper wire between the junction of R19, R20, and R21 and ground (see Fig. 6-6). This fixes the voltage at the grid of V24B at ground potential. Then measure the voltage at the plate of V24B (pin 1); it should be about + 80 volts. If this voltage does not measure close to + 80 volts, replace tube V24 again. Then, if necessary, check for such things as off-value resistors, broken leads, and poor switch contacts.

The next step is to measure the voltage difference be­ tween the two grids of V45 (pins 2 and 7). Since connecting a voltmeter at the grid of V45A (pin 2) may produce an adverse loading effect, it is recommended that this measure­ ment be made between the plate (pin 1) of V24B and the grid (pin 7) of V45B. With the TRIG. LEVEL CENTERING adjustment, you should be able to bring the voltage at the grid of V45B to within 4 or 5 volts of the voltage at the plate of V24B. This indicates that the hysteresis of the Trig­ ger Multivibrator can be set at the proper level with respect to the grid of V45A.

If the voltage at the grid of V45B cannot be brought to within 4 or 5 volts of the voltage at the plate of V24B with the TRIG. LEVEL CENTERING adjustment, trouble in the Trig­ ger Multivibrator is indicated. In this case, replace V45 again; then, if necessary, check the rest of the circuit for off-value resistors or other troubles.

Remove the jumper wire between the junction of R19, R20, and R21 and ground.

Troubleshooting the Time-Base Generator

No Horizontal Sweep. If the Time-Base Generator is not producing a sawtooth waveform when the STABILITY control is set fully clockwise, some defect in the circuit is causing the output to remain at some fixed voltage. A clue to the cause of this trouble can be obtained by measuring the plate voltage of the Miller tube, V I61A pin 6.

NOTE

A ll voltages in this section should be measured with a 20,000-ohm s-per-volt voltmeter or a vacuum-tube voltmeter.

The voltage reading obtained at the plate of V I61A will probably be approximately +260 volts, or approximately

+30 volts. A reading of +260 volts indicates that the Miller

Runup Circuit has run up and has not been reset, while a reading of +30 volts indicates that the Miller Runup Circuit is not being allowed to run up. The condition that exists will depend on the type of trouble. The two conditions of plate voltage will be handled separately in the following paragraphs.

High voltage at the plate of the Miller tube, V161A, in­ dicates that the tube is cut off. If this is the case, momen­ tarily ground the grid of the tube while monitoring the plate voltage. If the tube is good, the plate voltage will drop to about + 10 volts. Remove the ground as soon as the reading is taken. If the Miller tube is found to be good, measure the voltage at its grid. If this voltage is more than 20 volts negative, V152B is probably not conducting. In this case, check V I52, R147, and R148.

If the voltage at the grid of V I61A is not more negative than —20 volts (it should be about —5 volts), measure the voltage at the cathode of V I61B. If this voltage is approxi­ mately +200 volts, the Runup Cathode Follower stage may be assumed to be operating correctly. If this voltage is significantly lower than +200 volts, the stage is defective, and its grid and cathode circuits should be checked.

If the Runup Cathode Follower is found to be operating properly, measure the voltage at the cathode of V183A. If this voltage is more positive than —45 volts, the trouble is in the Sweep-Gating Multivibrator. Check the tubes and resistors in this circuit. The voltage divider network in the cathode circuit of V135B is particularly critical.

If the voltage at the cathode of V183A is more negative than —55 volts, check the tube in the Hold-Off Circuit, the

Hold-Off capacitors, and the resistors in the cathode circuits of the tube.

Low voltage at the plate of the Miller tube indicates that the tube is conducting quite heavily and is not being allowed to perform its normal run-up operation. If this trouble exists on only a few ranges of the TIME/DIV. control, the trouble is probably an open timing resistor. If the trouble exists on all ranges of the TIME/DIV. control, the trouble is probably due to a defective Sweep-Gating Multivibrator.

5-8

Check the voltage at the grid (pin 2) of V135A. If the voltage at this point is in the vicinity of —65 volts or lower

(more negative), the Sweep-Gating Multivibrator is faulty.

In this case, replace V I35 and V I45. If this does not remedy the trouble, check the rest of the circuit by voltage and resistance measurements.

If the voltage at the grid of V135A is more positive than

—60 volts, measure the voltage at the grid (pin 2) of V183B.

If the voltage at this point is —70 volts or lower (more negative), the Hold-Off Circuit is faulty. In this case, replace

V I83, and if this does not remedy the trouble, check the rest of the circuit by voltage and resistance measurements. (The cathode of V183B and the grid of V183A should be about

5 to 7 volts more positive than the grid of V183B. However, there should be a considerably greater voltage differential between the grid and cathode of V183A.) If the voltage at the grid of V183B is more positive than about —70 volts, the Runup Cathode Follower circuit is faulty. If this case, replace V I61, and if this does not remedy the trouble, check the rest of the circuit by voltage and resistance measurements.

Nonlinear Sweep. A nonlinear sweep will be generated if the current charging the Timing Capacitor does not remain constant. If the nonlinearity occurs at all sweep rates, a defective Miller Tube is probably the cause. If the non­ linearity occurs only at certain sweep rates, a leaky timing

Capacitor is probably the cause. A defective C l65 can also cause the sweep to be nonlinear at the faster sweep rates.

Constant Free-Running Trace. If the free-running trace cannot be turned off with the STABILITY control, the Sweep-

Gating Multivibrator is at fault. The most probable cause is a change in resistance in either of the grid circuits or in the cathode circuit.

Insufficient Horizontal Deflection. If the horizontal trace starts at the left-hand side of the screen, but does not extend to the right-hand side, the Hold-Off Circuit is resetting the

Sweep-Gating Multivibrator before the sweep is complete.

If the sweep cannot be adjusted to normal length with the

SWP. LENGTH adjustment, R176, the resistances in the cath­ ode circuit of V I61B should be checked.

Maintenance — Type 5 1 6

Troubleshooting the Horizontal Amplifier

No Spot or Trace. If a spot is visible when the horizontal deflection plates are externally shorted together, but disap­ pears when the short is removed, the horizontal deflection system is in a state of unbalance. The procedure for locating the defective stage in the Horizontal Amplifier is somewhat the same as that described for the Vertical Amplifier. That is, the shorting strap should be removed from the deflection plates, and connected between the grids of the Output Cath­ ode Follower, V364B and V384B. If no spot then appears, the

Output Cathode Follower stage is at fault.

If the spot does appear, however, the shorting strap should then be moved back to the grids of the Output Amplifier,

V364A and V384A. No spot on the crt when these points are shorted together indicates trouble in the Output Amplifier stage. Check for open resistors in the cathode and plate circuits.

If the spot appears when the grids of the Output Am­ plifier are shorted together, the trouble lies ahead of the

Output Amplifier.

Insufficient or no Horizontal Deflection. If the gain of the Horizontal Amplifier decreases, the timing will no longer correspond to the calibrated values indicated by the TIME/

DIV. control.

If the change in gain is only slight, as indicated by im­ proper timing and a slightly decreased horizontal sweep, the amplifier can usually be recalibrated. However, since the gain of the Horizontal Amplifier regulates the timing of the sweep, care must be taken to insure that the gain ad­ justments are accurately made. Refer to the Calibration sec­ tion if it is necessary to adjust the gain of the Horizontal

Amplifier.

If the decrease in gain of the Horizontal Amplifier is more pronounced, or if there is no horizontal deflection at all, check for defective components that can affect the gain but not the dc balance of the circuits. Such components, in ad­ dition to the tubes, would be the R225, (SWP. GAIN ADJ.),

R347, R377, and R259 (MAG. GAIN ADJ.).

5-9

Type 5 1 6

NOTES

ON

&

C A L I B R A T I O N

We recommend that the Type 516 Oscilloscope be cali­ brated after each 500 hours of operation or every six months, whichever comes sooner. It should not require more frequent calibration. However, whenever tubes or other circuit com­ ponents are replaced, the calibration of the circuit involved should be checked and, if necessary, readjusted.

Also, apparent troubles in the instrument can be caused by improper calibration of one or more circuits. Consequently, this section of the manual should be used in conjunction with the Maintenance section during troubleshooting work. If a trouble occurs in the instrument, you should be sure that it is not due to improper calibration before proceeding with more detailed troubleshooting.

In the instructions that follow, the steps are arranged in the proper sequence for a complete calibration of the instru­ ment. However, any single step may be performed individu­ ally or out of order as long as the entire step is performed, including references to other steps or adjustments, with certain exceptions. Due to interaction between adjustments in the

Horizontal and Vertical Amplifiers and the sweep timing cir­ cuits of the Time-Base Generator, single adjustments in these circuits cannot be made. When amplifier adjustments are re­ required, the entire amplifier should be recalibrated. In ad­ dition, if the —150-volt Power Supply is adjusted, the entire instrument should be recalibrated. Front-panel controls not mentioned in a given step are assumed to be set at the po­ sitions they were in at the end of the previous step.

Figs. 6-1, 6-2, and 6-3 show the location of the internal adjustments referred to in the Calibration procedures.

10/isec, 100 /isec, 1 msec, 5 msec, 10 msec, 100 msec, 1 sec, and a sine-wave output of 20 megahertz; accuracy of at least 1%.

5. Square-Wave Generator, Tektronix Type 106 or equiv­ alent. Required specifications are: (1) Output frequencies of

1 kHz and 450 kHz, (2) risetime of 15 nanoseconds or less, and (3) output amplitude variable from approximately 40 millivolts to 100 volts.

6. Constant-Amplitude Sigal Generator, Tektronix Type

191 or equivalent. Required specifications are: (1) output amplitude 200 millivolts and equal at all frequency settings, and (2) output frequency variable from 1 MHz to over

15 MHz.

7. 52-ohm termination resistor, Tektronix Type B52-R or equivalent.

8. 52-ohm 10-1 "L" pad, Tektronix Type B52-L10 or equiv­ alent.

9. Coaxial cable suitable for applying the outputs of the square-wave generator and the time-mark generator to the inputs of the Type 516, Tektronix Type P52 Coaxial Cable or equivalent.

10. 20 pF Input Capacitance Normalizer, Tektronix Cali­ bration Fixture 067-0538-00.

11. Low-capacitance calibration tools: Tektror'x Part Nu n- bers 003-0000-00, 003-0301-00 and 003-0007-00 or equiv­ alent.

EQUIPMENT REQUIRED

The following equipment is necessary for a complete cali­ bration of the Type 516 Oscilloscope:

1. DC voltmeter (sensitivity of at least 5000Q/volt calibrat­ ed for an accuracy of 1% or better at 100 volts, 150 volts, and 300 volts, and for an accuracy of 3% or better at 1675 volts.

2. Accurate rms-reading ac voltmeter, having a range of at least 0-125 volts (0-250 volts for 234-volt instruments).

3. Variable autotransformer having a rating of at least

3 amperes at 125 volts (or 1.5 amperes at 250 volts for 234- volt instruments).

4. Time-Mark Generator, Tektronix Type 184 or equivalent.

Time-Mark Generator used must have markers at 1 /xsec.

® l

CALIBRATION PROCEDURE

Preliminary

Remove the side covers from the Type 516 Oscilloscope.

Set the front panel controls as follows (controls not listed may be left in any position):

TIME BASE

TRIGGER SELECTOR

(black)

+INT.

TRIGGER SELECTOR

(red)

AC

STABILITY fully counterclockwise but not PRESET

TRIGGERING LEVEL 0

HORIZ DISPLAY NORM.

6-1

Calibration — Type 5 1 6

O A IN AOJ

M 7 1

Fig. 6 -1 . le f t tid » o f Type 5 1 6 O scilloscope, show ing lo ca tio n o f In te rn a l a d ju s t­ ments

6-2

Fig. 6*2 Bottom o f Typo 5 1 6 O scilloscope, show ing locatio n o f in to rn a l a d ju st­ ments.

«

Calibration — Type 5 1 6

IN T . TRIO.

D C LEVEL ,

R3

TRIG. SENS. TRIO . LEVEL

R 47 CENTERING

S W R ./M A G

REGIS.

C 160E

C 16 0 C

Cl60A 1

CAL.TEST H CAL. ADJ

RS79

TIME/DIV.

VARIABLE TIME/DIV.

INTENSITY

POWER

A VERTICAL

VOLTS/DIV.

VARIABLE VOLTS/DIV.

POLARITY

POSITION

B VERTICAL

VOLTS/DIV.

VARIABLE VOLTS/DIV.

POLARITY

POSITION tig . 6 -3 . Right tld a a t Typa S I6 O ttlllo K o p * . th a w in g la ta tlo n o f In ta rn a l a d |w il- m a n lt.

1 mSEC

CALIBRATED counterclockwise

PWR. OFF

MODE

HORIZONTAL POSITION

AMPLITUDE CALIBRATOR

A ONLY centered

OFF

Connect the Type 516 Oscilloscopo to Iho aulolransformor, and turn on all equipment. Set the output of the autotrons- formor to the nominal voltage for which your instrument is wired. Allow the instrument to worm up for a* leost 5 minutes before proceeding.

1

CALIBRATED

NORM. AC centered

1

CALIBRATED

NORM. AC centered

Power Supply

Proper operation of every circuit in the Type 516 Oscil­ loscope is dependent on correct power supply voltages. Since the regulated — 150-voll supply serves os the reference for the other regulated supplies it is very important that this supply be properly adjusted.

1. — 150 ADJ. (R 6 1 6 ). Measure the output voltage of the

-15 0-volt, the +100-voll and the -t-300-volt supplies at the

6-3

Calibration — Type 5 1 6

Pig. 6 -4 . Location o f Power Supply lo tt po in t* points indicated in Fig. 6-4. Set the —150 ADJ. control so that the 150-volt supply is within 2% ond the other sup­ plies within 3% of their rated values. Do not adiust the — 150

ADJ. control unless one or more of the supplies is actually out of tolorance or unless you are planning to porform a completo recalibration of tho instrument. The calibration of most of the circuits of the instrument w ill change if this con­ trol is adjusted.

2. Regulation. To check tho operation of the regulator cir­ cuits, vary the output voltage from tho autotransformer be­ tween tho limits specified in Section 2 of this manual, at the same time observing the required voltages. All of the volt­ ages should remain essentially constant and within specified tolerances over this range of line voltage.

Amplitude Calibrator

CRT Circuit

4. HV ADJ. R841. The adjustment that sets the high volt­ age determines the total accelerating voltage on the crt and

6-4

V

V.

3. CAL. ADJ. R879. When the CAL. ADJ. control is prop­ erly set, the calibrator output will be within 3% of the voltages indicated on tho front panel. To make this adjust­ ment, connect a voltmeter between the CAL. TEST PT. jack and ground, turn the AMPLITUDE CALIBRATOR control to

OFF, and adjust the CAL. ADJ. control for a meter reading of exactly 100 volts. To assure suitable symmetry of the cali­ brator waveform, the voltage at this point should fall to be­ tween 45 and 55 volts when the calibrator is turned on (to any of the output voltage settings). Readings outside of this range ore generally caused by unbalanced multivibrator tubes V875 or V885.

thus affects the deflection sensitivity. Do not adjust the high voltage unless it is actually of tolerance or unless you arc planning to perform a complete recalibration of the instrument.

Measure the voltage at the —1675 ADJ. TEST PT. at the top rear of the instrument. Set the HV ADJ. adjustment for a reading of — 1675 volts. This voltage should not vary more than 10 volts between the following limits: line voltage set a* its lower limit (see Section 2) and the INTENSITY con­ trol set fully clockwise; line voltage set at its upper limit and the INTENSITY control set fully counterclockwise.

5. Crt Alignment. Check to see that the face of the ert rests snugly against the graticule. If it docs not, loosen the crt clamp and move the tube forward by pushing on the crt tube socket. Then tighten the crt clamp.

Set the STABILITY control clockwise to free run the sweep.

Turn up the INTENSITY control until a trace is visible (it may be necessary to adjust the VERTICAL POSITION control) and adjust the FOCUS and ASTIGMATISM controls for the nar­ rowest trace width. W ith the VERTICAL POSITION control, position the trace directly behind the center horizontal grati­ cule lino. If the trace is tipped relative to the graticule line, rotate the crt alignment knob until the trace coincides with the graticule line.

6. Graticule Alignm ent. To check the alignment of the graticule, obtain a free-running trace on the oscilloscope, as explained in the provious step. Next move the trace, with the VERTICAL POSITION control, to the top of the graticule until the trace disappears. Then move the trace to the bot­ tom of the graticule until the trace disappears. If the grati­ cule lines are not centered in the usable viewing area, the graticule is improperly aligned in the vertical plane. The graticule may be repositioned by means of a nylon adjusting cam, located in the lower left corner of the graticule.

To make this adjustment, remove the graticule cover and loosen the set screw that holds tho positioning cam. By insorting a pointed tool |such as a scriber or center punch)

Into the small holo, the cam may bo rotatod until tho groticule lines are contered in tho usable viewing area. Then tighten the set screw that holds the nylon cam, and reploce the graticule cover.

7. Crt GEOMETRY ADJ. R 861. The geometry of the crt display is adjustable over a limited range by means of the

GEOMETRY ADJ. potontiomoter. To achieve optimum line­ arity, vertical lines are displayed on the crt and the GE­

OMETRY potentiometer is adjusted for minimum curvoture in the lines. Nonlinearity is most noticeable at the edges of the graticule.

Connect a time-mark generator to the A VERTICAL input connector ond adjust the TIME/DIV. control and the A VERTI­

CAL VOLTS/DIV. control to obtain vertical lines as illustrated in Fig. 6-5. Adjust the oscilloscope controls to obtain a sta­ ble display. Adjust the GEOMETRY ADJ. potentiometer for straight vertical lines running parallel to the left and right edges of the graticule.

The calibrator output waveform can be used in ploce of the time-mark generator to moke this adjustment, but due to the dimness of the trace, the adjustment is more difficult.

Calibration — Typo 5 1 6

Fig. A-S. Checking tho geom etry o f tho erf. W h rn the GEOMETRY ADJ. It p ro p o rly to f, vertical Iln o t w ill bo p o ra llo l w ith tho g ra ticu le Knot, a t th o w n in l a ) . If

OEOMETRY A D J I t not p ro p o rly to t, lin o t w ill a p p e a r a t th o w n In I b l o r l e t .

Triggering Circuits

Set the front panel control* as follow*:

TIME BASE

TRIGGER SELECTOR

(black]

TRIGGER SELECTOR

(red)

STABILITY

TRIGGERING LEVEL

HORIZ. DISPLAY

+ INT.

AC

Fully clockwise

0

NORM

.5 mSEC TIME/DIV.

A VERTICAL

VOLTS/DIV.

VARIABLE VOLTS/DIV.

POLARITY

MODE

AMPLITUDE CALIBRATOR

1

CALIBRATED

NORM. DC

A ONLY

.2

Conned o test lead from fhe CAL. OUT connector to the

A input connector; this should result in a free-running trace having an amplitude of one minor graticule division (one- fifth of major division). Center the traco vertically on the screen and adjust the INTENSITY, FOCUS and ASTIGMATIM controls for best definition. Then ground the junction of R19,

R20, and R2I with a short clip lead. This junction is located on tho Trigger switch (see Fig. 6-6).

8. TRIG. LEVEL CENTERING R39. Set the TRIG. SENS, con­ trol fully counterclockwise and the TRIG. LEVEL CENTERING control fully clockwise. Turn the STABILITY control counter­ clockwise until the trace just disappears from the ert screen, then two or three degrees further counterclockwise.

Rotate the TRIG. LEVEL CENTERING control slowly coun­ terclockwise until the trace appears (it may just flicker), then back off the control approximately 2 degrees clockwise from that point.

Whenever you adjust the TRIG. LEVEL CENTERING ad­ justment you should also adjust the TRIG. SENS, as described in the following step.

9. TRIG. SENS. R47- (Always perform step 8 before this step). Leave the jumper wire and calibrator signal connected as in fhe previous step. Rotate the TRIG. SENS, control slowly clockwise until the sweep triggers. Rotate the TRIG. LEVEL

CENTERING control until stable triggering is obtained with the black TRIGGER SELECTOR control in both the -f-INT, and —INT. position. Rotate the TRIG. SENS, control clock­ wise until unstable triggering occurs, then back off a few degrees into a stable region. Check that the sweep is trig­ gered on the - f slope of the calibrator woveform when the black TRIGGER SELECTOR control is set at + INT., and on the — slope when the switch is set at —INT. If the slopes ore reversed, reset the TRIG. SENS, and TRIG. LEVEL CEN­

TERING controls slightly until the slopes are correct and stable triggering is obtainod. Perform the next step im­ mediately.

10. INT. TRIG. DC LEVEL R3. Set the A VERTICAL VOLTS/

DIV. control to the .5 position, center the display vertically,

Fig. 6-A. G ro u n d in g tho function o f R1 9, RIO, and R JI to sim p lify tho o d ju u m .n l o f tho TRIG. LEVEL CENTERING and TRIG. SENS adjustm ents.

6-5

C alibration — Type 516 and turn the red TRIGGER SELECTOR control to the DC po­ sition. Then, while switching the black TRIGGER SELECTOR control back ond forth between + INT and —INT., adjust the INT. TRIG. DC LEVEL adjustment for stable triggering in both positions. It may be necessary to adjust the A VER­

TICAL POSITION control slightly to obtain stable triggering.

Disconnect the jumper wire and the calibrator signal.

11. PRESET STABILITY R i l l . * Set the red TRIGGER SE­

LECTOR control to the AUTO, position. Set the PRESET STA­

BILITY control (screwdriver adjustment, front panel) to its fully counterclockwise position and connect a voltmeter be­ tween the center orm of the PRESET STABILITY potentiometer and ground (see Fig. 6-7). Next, advance the PRESET STA­

BILITY control clockwise until a trace first appears on the crt.

Note the voltmeter reading for this setting of the control.

Then, advance the PRESET STABILITY control further clock­ wise until the trace brightens and note the voltmeter reading for this setting. Finally, back off the control until the volt­ meter indicates a reading midway between the two previous readings. Disconnect the voltmeter.

* A llh o u g h th i* c o n tro l I t sh o w n o n th « T im * Bass G e n e ra to r d r* c u lt d ia g ra m , It i i m orn c lo s o ly a t to c io in d w ith th o tr ig g e r in g d r * ew ifry o n d i t i a d ju s tm e n t is th e re fo re in c lu d e d In th is se ction .

Time-Base Generator and H orizontal A m p lifie r

The time-base circuits of the Type 516 should not require frequent readjustment. As o general rule, if the need for adjustment is indicated, you should first check all of the time-base ranges before making any adjustments. Often, only one control is misodjusted and can be recalibrated according to the following procedures.

Any nonlinearity present in the time base will generally be confined to the firs* major division of horizontal deflec­ tion. In these instructions, therefore, we recommend calibra­ ting the time-base circuits on the basis of time markers ap ­ pearing between the second and tenth vertical graticule lines

(one division in from the left- ond right-hand edges of the graticule).

In the instructions that follow, some of the adjustments interact to a degree. For this reason, it is important that you make the adjustments in the proper sequence.

Some of the Horizontal Amplifier adjustments affect the horizontal position of the crt display. As a result, it will be necessary to reposition the display with the HORIZONTAL

POSITION control to keep the time markers properly po­ sitioned with respect to the graticule lines.

Set up the Type 516 front panel controls as follows:

TIME BASE

AC TRIGGER SELECTOR

(red)

TRIGGER SELECTOR

(black)

STABILITY

TRIGGERING LEVEL

HORIZ. DISPLAY

TIME/DIV.

+ INT.

PRESET

0

NORM.

VARIABLE TIME/DIV.*

MODE

1 mSEC.

CALIBRATED

A ONLY

* M o k u iu r « lh « VAR IABLE T IM E /D IV . c o n tro l t t a y i In th o C A L I­

BRATED p o iit lo n d u rin g o il tim in g a d ju tt m o n ti.

12. M A G . G A IN ADJ. R259. Connect the output of the time-mark generator to the A VERTICAL input connector and set tho time-mark generator controls for a 100-micro- second morkor output. Adjust the Typo 516 A VERTICAL

VOLTS/DIV. control for a vertical doflection of about 3 major divisions. Center the display on the graticule with the PO­

SITION controls.

To calibrate the magnifier circuit, turn the HORIZ. DIS­

PLAY switch to the MAG. position and adjust the MAG.

GAIN ADJ. so that there are two time markers per major division.

13. SWP. G A IN ADJ. R225. Turn the HORIZ. DISPLAY switch to the NORM, position, remove the 100-microsecond markers and apply 1000-microsecond (1-millisecond) markers to the A VERTICAL input connector of the oscilloscope. Ad­ just the SWP. GAIN ADJ. for one marker per major division.

Fig. 6 -7 . A d ju s tm e n t o f th e PRESET STABILITY c o n tro l.

6-6

14. SWP. LENGTH R176. With 1-millisecond markers ap­ plied to the Vertical Amplifier, adjust the SWP. LENGTH ad­ justment for a sweep length of 10.5 divisions.

15. S W P ./M A G . REGIS. R358. Set the HORIZ. DISPLAY switch to the MAG. position and adjust the HORIZONTAL

POSITION control to align the first marker with the vertical centerline of the graticule. Then set the HORIZ. DISPLAY switch to the NORM, position and adjust the SWP./MAG.

REGIS, adjustment to again align the first marker with the center of the graticule. Repeat this step until the marker remains horizontally centered as the HORIZ. DISPLAY switch is changed from MAG. to NORM. Set the HORIZ. DISPLAY switch to the NORM, position.

16. Check Sweep Timing— 2 seconds/div. to .1 millisecond/div. This step checks the accuracy of the sweep timing components for sweep rates between 2 seconds per division and .1 millisecond per division. There are no ad­ justments to be made. Table 6-1 lists the time markers to be applied for the indicated settings of the TIME/DIV. switch and the number of markers per division to be observed for each setting. When checking sweep rates between .1 SEC and 2 SEC, it will be necessary to adjust the STABILITY con­ trol for a stable display.

TIME/DIV.

.1 mSEC

1 mSEC

2 mSEC

5 mSEC

10 mSEC

.1 SEC

1 SEC

2 SEC

TABLE 6-1

TIME MARKERS

100 /isec

1 msec

1 msec

5 msec

10 msec

100 msec

1 sec

1 sec

OBSERVE

1 marker/div.

1 marker/div.

2 marker/div.

1 marker/div.

1 marker/div.

1 marker/div.

1 marker/div.

2 marker/div.

17. 1-, 2 -, and 5-^.sec/div. Sweep Rates. Capacitor

C160C determines the sweep rate for the 1-, 2-, and 5-^.sec positions of the TIME/DIV. control.

Set the oscilloscope controls as outlined at the beginning of the Time-Base Generator and Horizontal Amplifier section with the exception of the TIME/DIV. control and the HORIZ.

DISPLAY switch. Set these controls to 5/xSEC and MAG., respectively. The STABILITY control may have to be adjusted to obtain a stable display in the following timing adjustments.

Connect the time-mark generator to the A VERTICAL input connector and display 1-microsecond markers. With the

HORIZONTAL POSITION control, position the display to the left so that the last ten timing markers are visible. Adjust

C160C so that each time marker is directly coincident with a vertical graticule line. It will be necessary to adjust the

HORIZONTAL POSITION control, as C160C is adjusted, to align the time markers with the graticule lines.

18. 1-, 2 -, and 5-ju.sec/div. Linearity. Capacitor C330 com­ pensates a voltage divider network at the input circuit of the

Horizontal Amplifier, and affects the sweep rate of the early part of the display at the faster sweep rates.

Calibration — Type 516

With the controls unchanged from Step 17, position the display to the right until the first ten timing markers are visible. Adjust C330 to align each time marker with a verti­ cal graticule line. Again, it will be necessary to adjust the

HORIZONTAL POSITION control, as C330 is adjusted, to align the time markers with the graticule lines.

There is some interaction between C160C and C330. It may be necessary to go back and forth two or three times between steps 17 and 18 to obtain satisfactory calibration.

19. 10-, 2 0 -, and 50-^.sec/div. Sweep Rates. Capacitor

C160E determines the sweep rate for the 10-, 20-, and 50-

/isec positions of the TIME/DIV. switch. To make this ad­ justment, set the HORIZ. DISPLAY switch to NORM, and the

TIME/DIV. switch to 10 ^.SEC. Display 10-microsecond mar­ kers from the time-mark generator.

Adjust C160E to obtain one time marker for each graticule line.

2 0 . 2-^ sec/d iv. Linearity. Capacitor C224 is one of three adjustments that determine the high-frequency response of the horizontal amplifier, and thereby the linearity of the crt display at the faster sweep rates. (The other two adjustments are C260 and C384). The time constants of these circuits are such as to permit adjustments at different sweep rates. C224 affects the response when the HORIZ. DISPLAY switch is in the NORM, position only, and is initially adjusted to provide the best linearity in the 2-/usec/div. range.

To make this adjustment, turn the TIME/DIV. control to 2

,u.SEC and display 1-microsecond markers from the time-mark generator. Adjust C224 so that two markers per division are displayed on the left half of the screen. You may ignore the linearity on the right half at this point.

21. .2 - and .5-^.sec/div. Sweep Rate. Capacitor C160A determines the sweep rate for the .2 and .5 ^.SEC positions of the TIME/DIV. control.

Continue displaying 1-microsecond markers, and turn the

TIME/DIV. control to .5 ^SEC. Make sure the VARIABLE

TIME/DIV. control remains in the CALIBRATED position. Ad­ just C160A so that a time marker is aligned with every other graticule line.

22. .2-^.sec/div. Linearity. At the ,2-^.sec/div. sweep rate the linearity of the crt display can be altered slightly by adjusting C260. In addition, the linearity adjustments for lower sweep rates become timing adjustments at the higher sweep rates. This is particularly true of C224 (step 20), which has a pronounced effect on the ,2-/isec/div. sweep rate. To adjust C260 (which may require a readjustment of C224), set the oscilloscope controls as follows:

HF SYNC TRIGGER SELECTOR

(red)

TRIGGER SELECTOR

(black)

HORIZ. DISPLAY

+ INT.

NORM.

TIME/DIV.

.2 juSEC

VARIABLE TIME/DIV.

CALIBRATED

Set the time-mark generator for a 50 nanosecond sinewave output, and adjust the STABILITY and A VERTICAL VOLTS/

6-7

Calibration — Type 5 1 6

DIV. controls for a stable display of about five divisions of vertical deflection. Now, adjust C260 for the most linear dis­ play. If the initial adjustment of C224 was correct, there will be four cycles per division in the display. If this is not the case, readjust C224 to obtain two cycles per division.

If you find it necessary to adjust C224 in this step, repeat steps 21 and 22.

2 3 . .04-yusec/div. Sweep Rate and Linearity. Capacitor

C384 affects the sweep rate and linearity of the display when the TIME/DIV. control is set to .2 /iSEC and the HORIZ.

DISPLAY control is in the MAG. position (this increases the sweep rate five times from .2 ^sec/div. to .04 fn sec/div.).

Set the oscilloscope controls as outlined in step 22 with the exception of the HORIZ. DISPLAY control; set this control to the MAG. position. Display a 50 nanosecond sine wave from the time-mark generator and adjust C384 to obtain eight cycles within the entire 10 divisions of horizontal deflection.

Disconnect the time-mark generator.

Vertical Amplifier

This section contains instructions for adjusting the Vertical

Amplifier in the Type 516 Oscilloscope. There is interaction between some of the vertical amplifier adjustments; for this reason, the adjustments should be made in the sequence that follows:

24. DC Balance. This adjustment is performed by the operator of the oscilloscope in the course of normal opera­ tion (it should be done every day). However, the mainte­ nance technician must check the adjustment at this point before proceeding with the calibration of the vertical am­ plifier.

Misadjustment of the control is indicated if a free-running trace (no signal) shifts vertically as the VARIABLE VOLTS/

DIV. controls are rotated. To perform this adjustment, it is necessary to obtain a reference trace on the crt. Set the

STABILITY control to the clockwise (free run) position and the TIME/DIV. control to ImSEC. Set the MODE switch to the ALTERNATE position. Two traces should be displayed on the crt, one controlled by the A VERTICAL POSITION control and one controlled by the B VERTICAL POSITION control. Adjust the A VERTICAL DC BAL. control (front panel) until there is no longer any vertical shift in the A Channel trace as the A VERTICAL VARIABLE control is rotated. Ad­ just the B VERTICAL DC BAL. control until there is no longer any vertical shift in the B Channel trace as the B VERTICAL

VARIABLE control is rotated.

2 5 . Amplifier G ain. Two adjustments, GAIN ADJ. and

CHANNEL A GAIN SET, determine the gain of the vertical amplifiers and therefore the calibration of the VOLTS/DIV. controls.

To adjust the GAIN ADJ. adjustment (R478) set the oscil­ loscope controls as follows:

TIME BASE

TRIGGER SELECTOR

(red)

AUTO.

TRIGGER SELECTOR

(black)

STABILITY

TRIGGERING LEVEL

HORIZ. DISPLAY

TIME/DIV.

VARIABLE TIME/DIV.

MODE

B VERTICAL

VOLTS/DIV.

VARIABLE TIME/DIV.

POLARITY

AMPLITUDE CALIBRATOR

|

+ INT.

not used in j AUTO. mode.

NORM.

1 mSEC

CALIBRATED

B ONLY

.05

CALIBRATED

NORM. AC

.2

Connect a jumper wire from the B VERTICAL input connec­ tor to the CAL. OUT connector, and adjust the INTENSITY,

FOCUS, ASTIGMATISM and POSITION controls for a suit­ able display. Make sure the B VERTICAL VARIABLE control is in the CALIBRATED position, and adjust the GAIN ADJ. adjustment for a deflection of exactly four major divisions.

To adjust the CHANNEL A GAIN SET adjustment (R440), set the oscilloscope controls as follows. Controls not men­ tioned are left in the position they were in at the beginning of step 25.

MODE

A VERTICAL

VOLTS/DIV.

VARIABLE

POLARITY

POSITION

A ONLY

.05

CALIBRATED

NORM. AC midrange

Connect the jumper wire from the A VERTICAL input connector to the CAL. OUT connector. Make sure the A VERTI-

CAL VARIABLE control is in the CALIBRATED position, and adjust the CHANNEL A GAIN SET adjustment for a deflection of exactly four major divisions. Remove the jumper wire.

2 5 . Attenuator High Frequency Compensation. To adjust the high-frequency compensation of the attenuators, set the front-panel controls as follows:

TIME BASE

TRIGGER SELECTOR

(black)

TRIGGER SELECTOR

(red)

HORIZ. DISPLAY

TIME/DIV.

VARIABLE TIME/DIV.

MODE

A and B VERTICAL AMPLIFIERS

VOLTS/DIV.

VARIABLE TIME/DIV.

POLARITY

POSITION

+INT.

AUTO.

NORM.

.5 mSEC

CALIBRATED

A ONLY

.05

CALIBRATED

NORM. AC m idrange

6-8

® f

TYPE 516

NORMALIZER

Fig. 6-8. Tektronix Type 106 Square-W ave G enerator connected fo r attenua tor high frequency compensation.

Connect the output of the square-wave generator through the 20-pF capacitance normalizer to the A VERTICAL input connector of the Type 516. Adjust the square-wave generator for an output frequency of 1 kHz. Fig. 6-8 shows the Tektronix

Type 106 Square-Wave Generator connected for high-fre­ quency compensation of the A Channel attenuator.

Set the A VERTICAL VOLTS/DIV. control to the .05 po­

Calibration — Type 5 1 6 sition and adjust the output amplitude of the square-wave generator to produce about 4 divisions of deflection on the crt screen. With the A VOLTS/DIV. switch set to the .05 position adjust the Output Amplitude control of the Type

106 to obtain 4 divisions of vertical deflection on the crt of the Type 516. If the signal can't be reduced to 4 divisions you may insert the 10XT/B52L10 attenuator. The attenuator should be placed between the Type 106 and the 20 pF capacitance normalizer.

Observing the top of the square wave adjust C403 for

SN range 101-569, and C420 for SN 570 and up, for the best square wave response. For instruments with SN 570 or higher change the POLARITY switch to the INV. AC posi­ tion. Observing the bottom of the square wave this time adjust C421 for the best square wave response. Then set the

A VERTICAL VOLTS/DIV. control to each of its other settings, and at each setting adjust the two capacitors exposed in the SHUNT-SERIES opening below the A VERTICAL VOLTS/

DIV. control for best square-wave response. In each case the SERIES capacitor (the adjustment on the right) affects the attenuator high-frequency compensation (see Fig. 6-9), and the SHUNT capacitor (the adjustment on the left) affects the attenuator input capacitance (see Fig. 6-10). Maintain about four divisions of vertical deflection on the crt screen by ad­ justing the output amplitude of the square-wave generator as you switch the VOLTS/DIV. control from one setting to the next. (With the Tektronix Type 106 Square-Wave Gener­ ator, the maximum vertical deflection will be less than four divisions when the VOLTS/DIV. control is in the 20 VOLTS/

DIV. position. The square wave presentation should be checked in the NORM and INV. positions of the POLARITY switch. They should look the same in either position of the switch.

Fig. 6 -9 . Compensating the atte n u a to r high-frequency response; (a ) proper compen­ sation, (b ) undercom pensation, and (c) overcompensation.

(a ) (b )

Fig. 6 -1 0 . A d ju stin g the in p u t capacitance; (a ) proper adjustm ent, (b ) and

(c) im prope r adjustm ent.

(c)

6-9

Calibration — Type 5 1 6

Adjustment of B channel is done in the same manner as outlined above. C503 is adjusted for instruments below

SN 570 while C520 and C521 are adjusted for instruments above this serial number.

2 7 . Switched Amplifier Interelectrode Capacitance Com­ pensation. When a signal with fast-rising portions is ap­ plied to one of the input channels, and that input channel is

“ turned off" by the action of the Switching Circuit, the grid- to-plate capacitance of the Switched Amplifier in that chan­ nel tends to couple a part of the signal through to the

Output Amplifier. When this happens, the coupled-through portions of the signal in the turned-off input channel appears as spikes on the signal in the other channel. To counteract this tendency, C450, C451, C550, and C551 must be adjusted to compensate for the grid-to-plate capacitance of their re­ spective Switched Amplifier tubes.

To adjust C450 and C451, apply a 1-kHz square wave from the Type 106 Square-Wave Generator to the A VERTICAL input connector. Set the black TRIGGER SELECTOR control to EXT. and apply an external triggering signal from the square-wave generator to the TRIGGER INPUT connector.

Set both VOLTS/DIV. controls to .05. Set the MODE switch to A ONLY and the TRIGGERING LEVEL and STABILITY controls for a stable display and several cycles of the square- wave signal. Set the amplitude control of the square-wave generator so that the peak-to-peak amplitude of the dis­ played square waves is slightly greater than the diameter of the face of the crt. Set the MODE switch to B ONLY. In­ spect the trace very carefully for small negative and positive spikes along its length. Adjust C450 and C451 as necessary to reduce the amplitude of these spikes, if any, as much as possible. Try to adjust both capacitors approximately the same amount in order to maintain the balance of the chan­ nel. When the adjustment is completed, both adjusting screws should extend about the same distance above the capacitor bodies.

TYPE 516

5 0 TERMINATION

Fig. 6 -1 1 . Connecting the Tektronix Type 106 Square-W ave Gener­ a to r to the Type 5 1 6 Oscilloscope fo r adjustm ent o f the D elay Line.

To adjust C550 and C551, apply the output of the square- wave generator to the B VERTICAL input connector, and set the MODE switch to A ONLY. Then adjust C550 and C551 in the manner described for C450 and C451 in the previous paragraph.

These adjustments interact with the adjustment of the Delay

Line described in the following paragraphs. Therefore, when­ ever you have changed the setting of any of these capaci­ tors, you should check the adjustment of the Delay Line.

Delay Line and Vertical Amplifier High Fre­ quency Compensation

O f all the adjustments you may be called upon to perform on the Type 516 Oscilloscope, the adjustment of the Delay

Line and the high-frequency compensation of the Vertical

Amplifier will be the most critical. This is due largely to the interaction between the adjustments. There are 42 variable capacitors and 2 variable inductors associated with the De­ lay Line, and 2 variable inductors and 4 variable capacitors in the Vertical Amplifier, and all of the adjustments interact to some degree.

Before making any of the adjustments decribed in this section, read the instructions carefully so that you will be sure of what is to be done. Study the photographs and il­ lustrations carefully in order to obtain a clear understanding of the result of each adjustment. Attempts to adjust the

Delay Line without adequate preparation frequently lead to a misadjustment more severe than the initial condition.

Displaying the Test Signal. To determine whether the

Delay Line is in need of adjustment, and to make the neces­ sary adjustments, you will need to apply a square wave to the oscilloscope and observe the waveform displayed on the crt. The risetime of the square wave applied will affect the accuracy of the tuning of the Delay Line; the shorter the rise­ time of the applied square wave, the greater will be the ability to tune accurately. For this reason, the risetime of the square wave applied should be kept as short as possible;

15 nanoseconds or less may be considered satisfactory for most uses of the oscilloscope. Also, the waveform should be free of overshoot and irregularities.

The Type 106 Square-Wave Generator which has a rise­ time of 1 nanosecond or less when connected as shown in

Fig. 6-11 is suitable for use in tuning the delay line of the

Type 516 oscilloscope. All tuning should be done on the positive half-cycle of the waveform.

A square-wave frequency of about 450 kHz is optimum for tuning the Type 516 Oscilloscope. This frequency per­ mits the broadest oscilloscope display while preventing the appearance of reflected aberrations from the preceding rise or fall of the waveform (these reflected aberrations can appear at frequencies over 500 kHz).

To check the response of the Vertical Amplifier and De­ lay Line, apply the 450-kHz square wave to the A VERTI­

CAL input connector and set the front-panel controls of the

Type 516 as follows:

TIME BASE

TRIGGER SELECTOR

(red)

AC

6-10

Calibration — Type 5 1 6

TRIGGER SELECTOR

(black)

STABILITY

HORIZ. DISPLAY

TIME/DIV.

VARIABLE TIME/DIV.

MODE

VERTICAL

VOLTS/DIV.*

VARIABLE TIME/DIV.

POLARITY

+ INT.

PRESET

NORM.

2 ^SEC

CALIBRATED

A ONLY

.05

CALIBRATED

NORM. DC

Determining the Amount of W rinkle in the Display.

There are two general types of “ wrinkle conditions" that may appear in a display as a result of an improperly adjusted

Delay Line. One type is that shown in Fig. 6-14 (a). This type of irregularity, which is most easily observed at a sweep rate of .2 ,usec/div., is generally caused by the misadjust- ment of a group of capacitors. However, if there appears to be a certain rhythmic waviness or symmetry to the distortion, the condition may be caused by faulty adjustment in either the termination network or in the high-frequency compensa­ tion of the Vertical Amplifier.

* l t is v e ry im p o rta n t to b yp a ss the e ffe c t o f th e a tte n u a to rs in the p ro ce d u re th a t fo llo w s . M a k e sure th o t th e V O L T S /D IV . c o n tro l is set to th e .0 5 p o s itio n a n d th a t the VARIABLE c o n tro l re m ain s in the CALIBRATED p o s itio n .

Adjust the TRIGGERING LEVEL control for a stable display and adjust the output amplitude control of the square-wave generator for approximately four divisions of vertical de­ flection. Position the display so that it is similar to Fig. 6-12.

It may be necessary to adjust the frequency control of the square-wave generator slightly to obtain the desired number of cycles on the crt screen.

After obtaining the desired display you can begin your examination for waveform distortion. There are three gen­ eral characteristics to appraise in determining the response of the Vertical Amplifier and the Delay Line. The first is the

“ level'' of the display, the second is the amount of “ wrinkle” in the flat portion of the display, and the third is the "square­ ness" of the leading edge and corner of the display.

Determining the Level of the Display. To determine the level of the display, position the waveform so that the flat top of the positive portion coincides with a horizontal grati­ cule line. If the top of the waveform is coincident with the graticule line for the entire positive half-cycle, the display is level. If there is either an upward or a downward slope to the top of the waveform, the display is not level. When the Delay Line is properly adjusted the display will be level.

Any departure from a level display is the result of a collec­ tive misadjustment of several Delay-Line capacitors. While it is possible to observe the level at a sweep rate of

.2 fi.sec/div., the level is most easily obeserved at the 2 or

5 juSEC position of the TIME/DIV. control. A waveform that is level, and two waveforms that are not level, are shown in Fig. 6-13.

Fig. 6 -1 2 . 45 0-kH z square wave displa yed on the Type 5 1 6 Oscillo­ scope a t a sweep rate o f 0 .2 /rse c/dlv. The term inatio n bump has been accentuated fo r this photograph.

The second type of wrinkle to look for is shown in Fig.

6-14 (b). This condition, a single aberration in the waveform, is also most easily observed at a sweep rate of .2 ^.sec/div., and is caused by the misadjustment of a single Delay-Line capacitor.

Determining the Squareness o f the Corner and Lead­ ing Edge. The risetime of the leading edge of the displayed square wave, and the squareness or sharpness of the corner at the top of the leading edge, are determined by the high- frequency response of the Delay-Line adjustments adjacent to the Vertical Amplifier. This condition is most easily ob­ served at a sweep rate of .2 jusec/div. The corner at the leading edge of the waveform should be as sharp or square as possible, but. must be free of overshoot and wrinkles. The

mm

—

•mm Wm n

:

mmrn e

(a ) (b )

Fig. 6 -1 3 . D eterm ining the level o f the displa y. The frequency o f the square wave is 450-kH z; the sweep rate is 2 /z s e c /d iv . (a ) shows a level w aveform , (b ) shows an up w a rd slope to the w aveform , and (c) shows a do w n w ard slope to the w ave­ form.

(c) s

® I

6-11

Calibration — Type 5 1 6

T T T T T T T T T T T T i i i I i | i r " i 1 1 1

(b ) i i i i i l l *

1 1 V 1

1 1

1 1 I t

Fig. 6 -1 4 . Determ ining the am ount of w rin kle in the displa y. The ab errations in (a ) are caused by a m isadjustment o f a group of capacitors; the single bump in (b ) is caused by the misadjustment of a single capacitor.

correct type of waveform is shown in Fig. 6-15 (a). The rounded-corner type of waveform, shown in Fig. 6-15 (b) is the result of insufficient high-frequency compensation, and the overshoot condition shown in Fig. 6-15 (c) is the result of overcompensation.

Delay Line Adjustment Procedure

There are four major steps in adjusting the Delay Line and the Vertical Amplifier in the Type 516 Oscilloscope.

These are:

1. Presetting the adjustments

2. Establishing a level display

3. Removing the wrinkles

4. Compensating the amplifier

It may be necessary, in some instances, to perform all of the steps listed in these instructions. In other cases, and particularly where the degree of misadjustment is minor, the first step can usually be omitted.

Presetting the Adjustments. If the displayed square-wave on the crt indicates that the Vertical Amplifier and the Delay

Line are considerably out of adjustment, presetting the con­ trols before starting the adjustment procedure will generally render the best results.

The variable inductors, L455 and L555, in the Vertical

Amplifier, should be preset so that the slugs are positioned deeper into the coil form than the windings of the coil ex­ tend. When the slugs are positioned below the coil windings, light can be observed between the top of the slugs and the bottom of the windings. Presetting the inductors in this man­ ner reduces their effect in the circuit, and the adjustment of the Delay Line is simplified.

The variable capacitors in the Delay Line should be preset so that the top of the adjusting screw extends about one- quarter of an inch above the top of the contact springs. The important characteristic is that the tops of all the adjusting screws should be at about the same height, both after the preset procedure and after the final adjustment.

The inductors and the capacitors in the termination net­ work (L485, L486, C485, C486) are the first to be adjusted in the adjustment procedure; for this reason it is not necessary to preset these controls. However, it is important to check the inductors for balance. The slugs in each inductor should be set to the same depth within the coil form.

Establishing a Level Display. The reference level for the displayed waveform is established by that portion of the

(a )

1V

_

(b )

L

Fig. 6 -1 5 . Determ ining the squareness o f the corner a n d le a d in g edge, (a ) shows the idea l w aveform ; the rounded corner in (b ) is the result o f in sufficie nt h ig h -fre ­ quency compensation in the a m p lifie r; an d the overshoot in (c) is the result o f excessive high-frequency compensation.

(O

6-12

square wave following the termination network. Make sure that the VOLTS/DIV. control is set to .05 and the VARIABLE control is set to the CALIBRATED position. Set the TIME/

DIV. control to .2 juSEC. Observe the waveform closely in the region near the center of the positive portion, and ad­ just the two inductors and the two capacitors in the termin­ ation network for the minimum termination bump. Be sure to check the inductors for balance as described in the prev­ ious paragraph.

The level of that portion of the square wave preceding the termination bump is determined by the collective effect of all the Delay-Line capacitors. Set the TIME/DIV. control to

2 ;U,SEC; this will produce narrow pulses on the crt screen and make it easy to ascertain any departure from a level display. Each capacitor must now be adjusted a small amount in a direction that will make the top of the square wave level. Start at the terminated end of the Delay Line and adjust each capacitor a small amount, carefully ob­ serving the top of the waveform for the result. Make sure that you retain a level top to the waveform as you progress toward the amplifier end of the line.

After you have been over the line once, and have estab­ lished an average level for the waveform, advance the sweep rate to 1 ^.sec/div. and repeat the procedure. This time, try to adjust the capacitors for a smooth transition from bump to bump, at the same time maintaining the level. Do not try to obtain a wrinkle-free line at this time. Just try to reduce the amplitude of all the bumps the same amount. The im­ portant consideration is to maintain the level of the wave­ form.

Removing the Bumps and Wrinkles. After you have established a level display, and reduced the amplitude of the bumps a bit, you can start removing the wrinkles and bumps to a greater degree. Again, start at the terminated end of the line and work toward the amplifier end.

Set the TIME/DIV. control to .5 jnSEC and adjust the ter­ mination network again to reduce the wrinkles in the vicinity of the termination bump. Do not try to achieve a perfectly straight line across the top of the waveform at this time. Just reduce the amplitude of the bumps by about one-half. Then advance to the first group (about 4 or 5) of the capacitors in the line and adjust them for a reasonably smooth line over that portion of the display they affect. Keep in mind that each capacitor will only require a slight adjustment, and that it is combined effect of a group of capacitors with which you must be concerned. As you advance along the line, from each group of capacitors to the next, turn the VARI­

ABLE TIME/DIV. control full left from time to time; this will decrease the sweep rate and narrow the pulse width so that you may more easily check the level of the waveform. It is just as important to maintain the level of the waveform as it is to achieve a wrinkle-free display.

After you have traversed the entire length of the Delay

Line, advance the sweep rate to .2 /xsec/div. and repeat the process. (Adjust the VARIABLE TIME/DIV. control to obtain the entire positive half-cycle on the crt.) Be extremely care­ ful in your adjustments at this time. Any capacitors that re­ quire adjusting will only need a slight "touch". Any over­ adjustment might nullify all of your efforts up to this point.

From time to time switch back to a sweep rate of 2 yusec/dfv. to check the level.

Upon completing this portion of the adjustment procedure, the display on the oscilloscope should appear similar to Fig.

6-15 (b). That is, the display should be level and free from bumps and wrinkles, with a pronounced rolloff at the leading corner. The final step in the adjustment procedure, therefore, is to square up the corner.

Squaring up the Corner.

Calibration — Type 5 1 6

With the TIME/DIV. control set to .2 jx SEC, position the display so that you have a good view of the leading edge and corner. Then, adjust L455 and

L555 in the Vertical Amplifier, being careful to adjust each inductor the same amount. Continue adjusting each inductor, maintaining balance, until the leading edge comes up to a sharp, square corner. This process will introduce some new wrinkles in the display, but these can be easily removed by adjusting the first few capacitors in the Delay Line. When the Vertical Amplifier and the Delay Line are in proper ad­ justment, the display should appear similar to Fig. 6-15 (a).

A slight readjustment of C450 and C451 may also improve the shape of the corner without seriously degrading the re­ sponse for which they were adjusted in step 27 of the pre­ ceding procedure. If you find it necessary to adjust them more than a slight amount, you should go back and check the adjustment as described in step 27. The final setting will be a compromise between the squareness of the corner and the amount of feedthrough allowable; the most emphasis should be put upon the squareness of the corner, since feed­ through from one channel to the other will not be a problem in most applications of the oscilloscope.

Apply the 450-kHz output of the square-wave generator to the B VERTICAL input connector and set the MODE switch to B ONLY. Note the shape of the leading corner. You may wish to adjust C550 and C551 and/or the first few capacitors of the Delay Line to improve the response of the B Channel.

The final setting will be a compromise between the response obtained through the A Channel and the response obtained through the B Channel. Usually, it is best to set.up one of the channels for optimum square-wave response, even if it means degrading the response on the other channel slightly.

Then all critical high-frequency observations can be made on the optimum channel.

Check Bandwidth o f Vertical Amplifier. Connect the output cable from the constant-amplitude signal generator to the A VERTICAL input connector of the Type 516. Set up the front panel controls as follows;

TIME BASE

TRIGGER SELECTOR

(red)

TRIGGER SELECTOR

(black)

STABILITY

HORIZ. DISPLAY

TIME/DIV.

VARIABLE TIME/DIV.

Fully clockwise (free run)

NORM.

1 mSEC

CALIBRATED

AC

+INT.

® I

6-13

Calibration — Type 516

MODE

A VERTICAL

VOLTS/DIV.

VARIABLE VOLTS/DIV.

POLARITY

A ONLY

.05

CALIBRATED

NORM. DC

Set the frequency control on the signal generator for an output frequency of 1 megahertz, and adjust the amplitude control on the signal generator for a vertical deflection of exactly 4 major divisions. Center the display vertically on the crt with the A VERTICAL POSITION control.

Then increase the output frequency of the signal genera­ tor to 15 megahertz. The deflection should be at least 2.8 major divisions. This corresponds to an attenuation of 3dB or less at 15 MHz as specified (see Section 1).

6-14

SECTION 7

MECHANICAL PARTS LIST

Type 5 1 6

7-1

Mechanical Parts List— Type 5 1 6

FRONT

7-2

Mechanical Parts List— Type 516

Fig. &

Index Tektronix

No.

1

2 ‘

Part No.

333-0603-00 101

333-0644-00 270

387-0224-00

354- 0057-00

355- 0043-00

212-0507-00

210

-

0010-00

.......................

210-0471-00

210-0223-00

210-0046-00

FRONT (c o n t)

Q

Serial/Model No. t

Eff_______Disc______ y

1 2 3 4 5

269

Description

1 PANEL, front

1 PANEL, front

1 PLATE, front subpanel

- plate includes:

1 RING, ornamental

4 STUD, graticule (replacement)

-

1 each stud includes:

SCREW, 10-32 x 3/8 inch, PHS

1 LOCKWASHER, internal, #10

1 RESISTOR, variable mounting hardware for each: (not included w/resistor)

1 NUT, hex., 1/4-32 x 19/32 inch

1 LUG, solder, 1/4 ID x 7/16 inch OD, SE

1 LOCKWASHER, internal, 0.261 ID x 0.400 inch OD

3

4

131-0081-00 101

131-0126-00 2030

366-0031-00

213-0004-00

366-0029-00 101

366-0142-00 3210

213-0004-00

262-0333-00 101

262-0402-00 270

262-0564-00 1959

260-0332-00 101

260-0377-00 270

210-0013-00

210-0413-00

2029

3209

269

1958

269

1

1

1

4

4

1

1

1

1

1

1

1

1

1

CONNECTOR, coaxial, 1 contact, UHF

CONNECTOR, coaxial, 1 contact, BNC

KNOB, small red--TRIGGER SELECTOR knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

KNOB, large black--TRIGGER SELECTOR

KNOB, large charcoal--TRIGGER SELECTOR knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

SWITCH, wired— TRIGGER SELECTOR

SWITCH, wired--TRIGGER SELECTOR

SWITCH, wired--TRIGGER SELECTOR switch includes:

SWITCH, unwired

SWITCH, unwired mounting hardware: (not included w/switch)

LOCKWASHER, internal, 3/8 ID x 11/16 inch OD

NUT, hex., 3/8-32 x 1/2 inch

5

6

129-0020-00

355-0503-00

200-0072-00

210

-

0010-00

210-0445-00

366-0032-00

213-0004-00

366-0030-00 101

366-0146-00 3210

213-0004-00

210-0013-00

210-0413-00

3209

1 ASSEMBLY, binding post assembly includes:

1 STEM

1 CAP mounting hardware: (not included w/assembly)

1 LOCKWASHER, internal, #10

1 NUT, hex., 10-32 x 3/8 inch

1 KNOB, small red--STABILITY knob includes:

1 LOCKWASHER, internal, #4

1 KNOB, large black— TRIGGERING LEVEL

1 KNOB, large charcoal--TRIGGERING LEVEL knob includes:

1 SCREW, set, 6-32 x 3/16 inch, HSS

1 RESISTOR, variable

- mounting hardware: (not included w/resistor)

1 LOCKWASHER, internal, 3/8 ID x 11/16 inch OD

1 NUT, hex., 3/8-32 x 1/2 inch

7-3

Mechanical Parts List— Type 516

Fig. &

Index

No.

7

Tektronix

Part No.

Serial/Model No.

E ff Disc

Q t y

FRONT (cont)

1 2 3 4 5

366-0033-00 101

366-0148-00 3210

213-0004-00

358-0029-00

210-0840-00

210-0413-00

3209

Description i i i i i i

KNOB, small black--HORIZ DISPLAY

KNOB, small charcoal--HORIZ DISPLAY knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

BUSHING, hex., 3/8-32 x 13/32 inch mounting hardware: (not included w/bushing)

WASHER, flat, 0.390 ID x 9/16 inch OD

NUT, hex., 3/8-32 x 1/2 inch

8

8

9

10

11

366-0038-00

213-0004-00

366-0040-00 101

366-0160-00 3210

213-0004-00

366-0038-00

213-0004-00

366-0040-00

366-0160-00

213-0004-00

101

3210

136-0031-00 101

136-0031-01 4360

210-0021-00

210-0414-00

129-0036-00 101

129-0063-00 3210

358-0036-00 101

358-0169-00 3210

210-0445-00 101

220-0410-00 2160

210-0010-00 101

210-0206-00 101

366-0033-00 101

366-0148-00 3210

213-0004-00

210-0013-00

210-0840-00

210-0413-00

3209

3209

4359

3209

3209

2159

2159X

2159X

3209 i i i i i i i i i i i i i i

3

3

1

1

2

1

1

1

KNOB, small red--VARIABLE knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

KNOB, large black--TIME/DIV

KNOB, large charcoal--TIME/DIV knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

SEE RIGHT SIDE PAGE FOR SWITCH PARTS

KNOB, small red— VARIABLE knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

KNOB, large black--TIME/DIV

KNOB, large charcoal--TIME/DIV knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

SEE RIGHT SIDE PAGE FOR SWITCH PARTS

SOCKET, light, red

SOCKET, light, green socket includes:

LOCKWASHER, internal, 0.480 inch ID

NUT, hex., 15/32-32 x 9/16 inch

POST, binding

POST, binding mounting hardware for each: (not included w/post)

BUSHING, binding post, black

BUSHING, binding post, charcoal

NUT, hex., 10-32 x 3/8 inch

NUT, keps, 10-32 x 3/8 inch

LOCKWASHER, internal, #10

LUG, solder, SE #10

1

1

1

1

1

1

1

KNOB, small black--POWER & SCALE ILLUM

KNOB, small charcoal--POWER & SCALE ILLUM knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

RESISTOR, variable mounting hardware: (not included w/resistor)

LOCKWASHER, interna, 3/8 ID x 11/16 inch OD

WASHER, flat, 0.390 ID x 9/16 inch OD

NUT, hex., 3/8-32 x 1/2 inch

7 -4

Mechanical Parts List— Type 516

Fig. &

Index

No.

12

Tektronix

Part No.

210-0013-00

210-0413-00

FRONT (cont)

Serial/Model No.

E f f

Disc

Q t y 1 2 3 4 5

366-0028-00 101

366-0145-00 3210

213-0004-00

3209

Description i i i i i i

KNOB, large b1ack--HORIZONTAL POSITION

KNOB, large charcoal--HORIZONTAL POSITION knob Includes:

SCREW, set, 6-32 x 3/16 inch, HSS

RESISTOR, variable mounting hardware: (not included w/resistor)

LOCKWASHER, internal, 3/8 ID x 11/16 inch OD

NUT, hex., 3/8-32 x 1/2 inch

13

14

15

366-0038-00

213-0004-00

366-0040-00 101

366-0160-00 3210

213-0004-00

129-0035-00

355-0507-00

200-0103-00

210-0455-00

210-0046-00

366-0028-00 101

366-0145-00 3210

213-0004-00

262-0332-00

260-0098-00

210-0013-00

210-0413-00

3209

3209

1

1 i i i i i

3

1

1

1

1

1

1

1

1

1

KNOB, small red--VARIABLE knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

KNOB, large black— VOLTS/DIV

KNOB, large charcoal--VOLTS/DIV knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

SEE TURRET ATTENUATOR PAGE FOR SWITCH PARTS

ASSEMBLY, binding post each assembly includes:

STEM

CAP

NUT, hex., 1/4-28 x 3/8 inch

LOCKWASHER, internal, 0.261 ID x 0.400 inch OD

KNOB, large black--AMPLITUDE CALIBRATOR

KNOB, large charcoal--AMPLITUDE CALIBRATOR knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

SWITCH, wired--AMPLITUDE CALIBRATOR switch includes:

SWITCH, unwired mounting hardware: (not included w/switch)

LOCKWASHER, internal 3/8 ID x 11/16 inch OD

NUT, hex., 3/8-32 x 1/2 inch

16 366-0031-00

213-0004-00

366-0029-00 101

366-0142-00 3210

213-0004-00

262-0337-00 101

262-0433-00 570

260-0326-00

384-0213-00

376-0014-00

210-0012-00

210-0413-00

210-0013-00

210-0413-00

3209

569

1

1

1

1

1

1

1

1

1

1

1

1

1

2

KNOB, small red--POSITION knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

KNOB, large black--POLARITY

KNOB, large charcoal— POLARITY knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

SWITCH, wired--B VERTICAL POLARITY

SWITCH, wired— B VERTICAL POLARITY switch includes:

SWITCH, unwired

ROD, extension

COUPLING

LOCKWASHER, internal 3/8 ID x 1/2 inch OD

NUT, hex., 3/8-32 x 1/2 inch mounting hardware: (not included w/switch)

LOCKWASHER, internal, 3/8 ID x 11/16 inch OD

NUT, hex., 3/8-32 x 1/2 inch

7 -5

Mechanical Parts List— Type 516

Fig. &

Index Tektronix

No. Part No.

17 401-0004-00

211-0025-00

FRONT (c o n t)

Q

Serial/Model No. t

Eff_______Disc______ y

1 2 3 4 5

Description

1

1

CAM, plastic (under cover) mounting hardware: (not included w/cam)

SCREW, 4-40 x 3/8 inch, FHS

18

19

20

331-0037-00

358-0054-00

366-0031-00

213-0004-00

366-0029-00 101

366-0142-00 3210

213-0004-00

262-0344-00 101

262-0432-00 570

260-0331-00

384-0213-00

376-0014-00

210-0413-00

210-0013-00

210-0413-00

3209

569

1

1

1

1

1

1

3

1

1

1

1

1

1

1

2

GRATICULE, 5 inch, 6 cm vert. X10 cm horiz.

BUSHING, banana jack

KNOB, small red--P0SITI0N knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

KNOB, large black*-POLARITY

KNOB, large charcoal--POLARITY knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

SWITCH, wired--A VERTICAL POLARITY

SWITCH, wired--A VERTICAL POLARITY switch includes:

SWITCH, unwired

ROD, extension

COUPLING

NUT, hex., 3/8-32 x 1/2 inch mounting hardware: (not included w/switch)

LOCKWASHER, internal, 3/8 ID x 11/16 inch OD

NUT, hex., 3/8-32 x 1/2 inch

21

22

23

366-0033-00 101

366-0148-00 3210

213-0004-00

260-0325-00

210-0012-00

210-0840-00

210-0413-00

366-0038-00

213-0004-00

366-0040-00 101

366-0160-00 3210

213-0004-00

366-0033-00 101

366-0148-00 3210

213-0004-00

210-0013-00

210-0840-00

210-0413-00

3209

3209

3209

1

1

1

1

1

1

1

KNOB, small black--MODE

KNOB, small charcoal--MODE knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

SWITCH, unwired--MODE mounting hardware: (not included w/switch)

LOCKWASHER, internal, 3/8 ID x 1/2 inch OD

WASHER, flat, 0.390 ID x 9/16 inch OD

NUT, hex., 3/8-32 x 1/2 inch

1

1

1

1

1

1

1

1

1

1

1

1

KNOB, small red— VARIABLE knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

KNOB, large black--VOLTS/DIV

KNOB, large charcoal— VOLTS/DIV knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

SEE TURRET ATTENUATOR PAGE FOR SWITCH PARTS

KNOB, small black--INTENSITY

KNOB, small charcoal--INTENSITY knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

RESISTOR, variable mounting hardware: (not included w/resistor)

LOCKWASHER, internal, 3/8 ID x 11/16 inch OD

WASHER, flat, 0.390 ID x 9/16 inch OD

NUT, hex., 3/8-32 x 1/2 inch

7 -6

Mechanical Parts List— Type 516

Fig. &

Index

No.

24

Tektronix

Part No.

210-0013-00

210-0840-00

210-0413-00

FRONT (cont)

Serial/Model No.

Eff Disc

Q t y 1 2 3 4 5

366-0033-00 101

366-0148-00 3210

213-0004-00

3209

Description i i i i i i i

KNOB, small black--FOCUS

KNOB, small charcoal--FOCUS knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

RESISTOR, variable mounting hardware: (not included w/resistor)

LOCKWASHER, internal, 3/8 ID x 11/16 inch OD

WASHER, flat, 0.390 ID x 9/16 inch OD

NUT, hex., 3/8-32 x 1/2 inch

25 366-0033-00 101

366-0148-00 3210

213-0004-00

210-0013-00

210-0840-00

210-0413-00

3209 i i i i i i i

KNOB, small black--ASTIGMATISM

KNOB, small charcoal--ASTIGMATISM knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

RESISTOR, variable mounting hardware: (not included w/resistor)

LOCKWASHER, internal, 3/8 ID x 11/16 inch OD

WASHER, flat, 0.390 ID x 9/16 inch OD

NUT, hex., 3/8-32 x 1/2 inch

26 200-0382-00

354-0116-00

210-0816-00

210-0424-00 i i

4

4

COVER, graticule cover includes:

RING, ornamental mounting hardware: (not included w/cover)

WASHER, rubber

NUT, knurled, 3/8-24 x 9/16 inch

27

28

337-0187-00

124-0068-00

1

1

SHIELD, graticule light (under cover)

STRIP, felt (under cover)

7-7

Mechanical Parts List— Type 5 1 6 REAR

7 - 8

Mechanical Parts List— Type 516

Fig. &

Index

No.

Tektronix

Part No.

1

2

387-0220-00

213-0104-00

387-0221-00

354-0057-00

260-0209-00

210-0414-00

354-0055-00

210-0902-00

210-0473-00

REAR (cont)

Serial/Model No.

E f f Disc

Q t y 1 2 3 4 5

Description i PLATE, rear overlay

mounting hardware: (not Included w/plate)

4 SCREW, thread forming, #6 x 3/8 inch, THS

1 PLATE, rear sub-panel

-

1 plate includes:

RING, ornamental

1 SWITCH, toggle -- CRT CATHODE SELECTOR

mounting hardware: (not included w/switch)

1 NUT, hex., 15/32-32 x 9/16 inch

1 RING, locking

1 WASHER, flat, 0.470 ID x 21/32 inch OD

1 NUT, 12 sided, 15/32-32 x 0.634 inch

3 129-0036-00 101

129-0063-00 3210

358-0036-00 101

358-0169-00 3210

210-0445-00 101

220-0410-00 2160

210-0010-00 101

210-0206-00 101

3209

3209

2159

2159X

2159X

1 POST, binding, black

1 POST, binding, charcoal

mounting hardware: (not included w/post)

1 BUSHING, binding post, black

1 BUSHING, binding post, charcoal

2 NUT, hex., 10-32 x 3/8 inch

1 NUT, keps, 10-32 x 3/8 inch

1 LOCKWASHER, internal, #10

1 LUG, solder, SE #10

6

7

378-0010-00

380-0017-00

212-0031-00

210-0458-00

210-0402-00

8 334-0649-00

213-0088-00

9 131-0102-00 101

131-0102-01 3920

131-0102-02 4420

129-0041-00 101

129-0041-01 3920

200-0185-00 101

200-0185-01 3920

204-0335-00 4420

210-0003-00 101

210-0551-00 101

211-0132-00 X3920

211-0534-00 4420

3919

4419

3919

4419

3919

4419

3919X

3919X

4419

1 FILTER, air

1 HOUSING, air filter

mounting hardware: (not included w/housing)

2 SCREW, 8-32 x 1 1/4 inches, RHS

2 NUT, keps, 8-32 x 11/32 inch

2 NUT, hex., 8-32 x 5/16 inch

1 TAG, voltage rating

mounting hardware: (not included w/tag)

2 SCREW, thread forming, 4-40 x 1/4 inch, PHS

2

2

1

-

1

1

1

1

1

1 CONNECTOR, motor base, 3 wire

1 CONNECTOR, motor base, 3 wire

1 CONNECTOR, motor base, 3 wire connector includes:

POST, ground

COVER, plastic

COVER, plastic

BODY, contact assembly

LOCKWASHER, external, #4

1

NUT, hex., 4-40 x 1/4 inch

SCREW, sems, 4-40 x 1/2 inch, PHS

SCREW, sems, 6-32 x 5/16 inch, PHS

7-9

M e c h a n ic a l Parts List— Typ e 5 1 6

Fig. &

Index Tektronix

No. Part No.

Serial/Model No.

Eff Disc

REAR (c o n t)

Q t y

1 2 3 4 5

211-0015-00 101

213-0088-00 3920

213-0146-00 4420

214-0078-00

377-0041-00

377-0051-00

101

3920

214-1016-00 4420

386-0933-00 101

386-1356-01 4420

211-0537-00

210-0457-00

3919

4419

3919

4419

4419

Description

1

1

SCREW, 4-40 x 1/2 inch, PHS

SCREW, thread forming, 4-40 x 1/4 inch, PHS

1

2

1

1

1

SCREW, thread forming, #6 x 0.312 inch, PHS

PIN, connecting

INSERT, plastic

INSERT, plastic

INSULATOR, connector

1

1 PLATE, mounting

mounting hardware: (not included w/connector)

2 SCREW, 6-32 x 3/8 inch, THS

2 NUT, keps, 6-32 x 5/16 inch

10 352-0002-00

352-0010-00

200-0582-00

210-0873-00

-

1 ASSEMBLY, fuse holder assembly includes:

1

1

HOLDER, fuse

CAP, fuse, black

1

1

WASHER, rubber, 1/2 ID x 11/16 inch OD

NUT

RIGHT SIDE

M e c h a n ic a l P a rtf L ift— Typ e 5 1 6

6

5

1

2

3

REF.

N O .

P A R T N O .

3 7 6 - 0 0 1 1 - 0 0

S IR IA L /M O O E L N O .

EFF.

D IS C .

o

T

T.

2 1 3 - 0 0 6 8 - 0 0

2 6 2 - 0 1 2 5 - 0 0

2 6 2 - 0 6 3 0 - 0 0

2 6 0 - 0 1 8 6 - 0 0

2 1 0 - 0 6 1 3 - 0 0

2 1 0 - 0 8 6 0 - 0 0

2 1 0 - 0 0 1 2 - 0 0

101

5 7 0

5 6 9

D E S C R IP T IO N

1

-

2

1 i

-

C O U P L I N G , p l a s t i c , i n s u l a t i n g c o u p l i n g i n c l u d e s :

S C R E W , se t , 6 - 6 0 x 1 / 8 i n c h , HS S

S W I T C H , w l r e d - - H O R I Z . D I S P L A Y

S W I T C H , w i r e d - - H O R I Z . D I S P L A Y s w i t c h i n c l u d e s :

1 S W I T C H , u n w i r e d

m o u n t i n g h a r d w a r e : (not I n c l u d e d w / s w l t c h )

1

1

1

N U T , h e x . , 3 / 8 - 3 2 x 1/2 in c h

W A S H E R , f l a t , 0 . 3 9 0 ID x 9 / 1 6 in c h O D

LOCKWASHP.R, I n t e r n a l , 3 / 8 I D x 1/2 i n c h O D

3 3 7 - 0 0 0 8 - 0 0

2 1 0 - 0 2 0 6 - 0 0

2 1 1 - 0 0 3 8 - 0 0

2 1 0 - 0 6 0 6 - 0 0

1

-

3 S H I E L D , t u b e

L U G , s o l d e r , D E # 6 m o u n t i n g h a r d w a r e : (not I n c l u d e d w / l u g )

1 S C R E W , 6 - 6 0 x 5 / 1 6 inch, 100° c s k , F H S

I N U T , h e x . , 6 - 6 0 x 3 / 1 6 inch

7 - n

Mechanical Parts List— Type 516

Fig. &

Index Tektronix

No. Part No.

6 386-0533-00

211-0504-00

7 386-0254-00

211-0534-00

210-0006-00

210-0407-00

RIGHT SIDE (c e n t)

Q

Serial/Model No. t

Eff_______Disc______ y

1 2 3 4 5

X140

Xl40

X140

X140

Description

1

2

1

1

2

2

2

PLATE, white plastic mounting hardware: (not included w/plate)

SCREW, 6-32 x 1/4 inch, PHS

CAPACITOR mounting hardware: (not included w/capacitor)

PLATE, fiber

SCREW, sems, 6-32 x 5/16 inch, PHS

LOCKWASHER, internal, #6

NUT, hex., 6-32 x 1/4 inch

8 166-0096-00

343-0015-00

343-0084-00

211-0504-00

210-0803-00

101

1316

1315

1

2

2

2

2

TUBE, conduit mounting hardware: (not included w/tube)

CLAMP

CLAMP, strap

SCREW, 6-32 x 1/4 inch, PHS

WASHER, flat, 0.150 ID x 3/8 inch OD

9 387-0219-00

211-0507-00

1

4

PLATE, vertical bulkhead mounting hardware: (not included w/plate)

SCREW, 6-32 x 5/16 inch, PHS

10

11

179-0435-00

179-0132-00

124-0092-00

355-0046-00

361-0009-00

361-0008-00

101

710

101

710

709

709

1

1

1

1

1

1

CABLE HARNESS, focus & intensity

CABLE HARNESS, focus & intensity

STRIP, ceramic, 3/4 h, w/3 notches strip includes:

STUD, plastic mounting hardware: (not included w/strip)

SPACER, plastic, 0.406 inch long

SPACER, plastic, 0.281 inch long

12

13

348-0005-00

406-0657-00

212-0040-00

210-0458-00

X201

X201

X201

4

4

1

1

GROMMET, rubber, 1/2 inch diameter

BRACKET, chassis support mounting hardware: (not included w/bracket)

SCREW, 8-32 x 3/8 inch, 100° csk, FHS

NUT, keps, 8-32 x 11/32 inch

14

15

211-0503-00

210-0006-00

210-0407-00

352-0008-00

352-0067-00

101

3620

3619

1

2

2

2

SWITCH, thermal cutout mounting hardware: (not included w/switch)

SCREW, 6-32 x 3/16 inch, PHS

LOCKWASHER, internal, #6

NUT, hex., 6-32 x 1/4 inch

4

4

HOLDER, neon bulb, single, black

HOLDER, neon bulb, single, gray

7-12

Mechanical Parts List— Type 516

Fig. &

Index

No.

Tektronix

Part No.

378-0541-00

211-0031-00

211-0109-00

210-0406-00

Serial/Model No.

Eff Disc

Q t y

RIGHT SIDE (cont)

1 2 3 4 5

X3620

101

3620

3619

Description

4 FILTER, lens, neon

mounting hardware for each: (not Included w/holder)

1 SCREW, 4-40 x 1 inch, 100° csk, FHS

1 SCREW, 4-40 x 7/8 inch, 100° csk, FHS

2 NUT, hex., 4-40 x 3/16 inch

16

17

18

19

262-0334-00

262-0334-01

262-0334-02

260-0329-00

384-0147-00

376-0014-00

210-0413-00

210-0840-00

210-0012-00

406-0582-00

348-0002-00

348-0003-00

348-0004-00

211-0029-00

210-0202-00

210-0803-00

211-0507-00

210-0013-00

210-0413-00

101

3930

4770

384-0133-00

3929

4769

1 SWITCH, wired--TIME/DIV

1 SWITCH, wired--TIME/DIV

1 SWITCH, wired--TIME/DIV

-

1

1

1 switch includes:

SWITCH, unwired--TIME/DIV

ROD, extension

COUPLING

2 NUT, hex., 3/8-32 x 1/2 inch

1

1

WASHER, flat, 0.390 ID x 9/16 inch OD

LOCKWASHER, internal, 3/8 ID x 1/2 inch OD

1

3

2

BRACKET

GROMMET, rubber, 1/4 inch

GROMMET, rubber, 5/16 inch

1 GROMMET, rubber, 3/8 inch

2 SCREW, 5-40 x 3/16 inch, PHS

1 LUG, solder, SE #6

mounting hardware: (not included w/switch)

4 WASHER, flat, 0.150 ID x 3/8 inch OD

4 SCREW, 6-32 x 5/16 inch, PHS

1 LOCKWASHER, internal, 3/8 ID x 11/16 inch 0D

1 NUT, hex., 3/8-32 x 1/2 inch

1 ROD, extension

(? ) 7-13

Mechanical Part* List— Type 5 1 6

LEFTSIDE

7-14

M e c h a n ic a l Parts List— Typ e 5 1 6

Fig. &

Index

No.

1

Tektronix

Part No.

Serial/Model No.

Eff Disc

LEFT SIDE (c o n t)

Q

t

y

1 2 3 4 5

432-0022-00 101

432-0022-02 5090

211-0561-00

210-0503-00

5089

Description i BASE, CRT rotator i BASE, CRT rotator

mounting hardware: (not included w/base)

2 SCREW, 6-32 x 3/8 inch, FH cap

1 NUT, rotator securing

2

3

4

5

6

7

8

386-1485-00 X5090

211-0022-00

354-0078-00

354-0178-00

101

1320

211-0507-00

210-0006-00

210-0407-00

..........

211-0510-00

210-0802-00

210-0803-00

210-0202-00

210-0407-00

210-0465-00

210-0011-00

337-0088-00

211-0559-00

210-0457-00

211-0514-00

210-0006-00

385-0127-00

210-0803-00

210-0811-00

210-0457-00

136-0001-00

211-0534-00

210-0803-00

210-0457-00

1319

1 PLATE, retaining (not shown)

mounting hardware: (not included w/plate)

1 SCREW, 2-56 x 3/16 inch

1 RING, CRT rotator

1 RING, CRT rotator

1 CAPACITOR

mounting hardware: (not included w/capacitor)

2 SCREW, 6-32 x 5/16 inch, PHS

2 LOCKWASHER, internal, #6

2 NUT, hex., 6-32 x 1/4 inch

1 CAPACITOR, variable

mounting hardware: (not included w/capacitor)

2 SCREW, 6-32 x 3/8 inch, PHS

2 WASHER, flat, 0.150 ID x 5/16 inch OD

2 WASHER, flat, 0.150 ID x 3/8 inch OD

2 LUG, solder, SE #6

2 NUT, hex., 6-32 x 1/4 inch

1 RESISTOR, variable

mounting hardware: (not included w/resistor)

1 NUT, hex., 1/4-32 x 3/8 inch

1 LOCKWASHER, internal, 1/4 ID x 15/32 inch OD

1 SHIELD, CRT

mounting hardware: (not included w/shield)

5 SCREW, 6-32 x 3/8 inch, 100° csk, FHS

2 BRACKET

5 NUT, keps, 6-32 x 5/16 inch

1 SCREW, 6-32 x 3/4 inch, PHS

1 LOCKWASHER, internal, #6

1 ROD, hex., 9/32 inch

2 WASHER, flat, 0.150 ID x 3/8 inch OD

2 WASHER, fiber, #6

1 NUT, keps, 6-32 x 5/16 inch

2 SOCKET, graticule light

mounting hardware for each: (not included w/socket)

1 SCREW, sems, 6-32 x 5/16 inch, PHS

1 WASHER, flat, 0.150 ID x 3/8 inch OD

1 NUT, keps, 6-32 x 5/16 inch

7-15

Mechanical Parts List— Type 516

Fig. &

Index

No.

9

10

11

12

Tektronix

Part No.

211-0017-00

210-0004-00

166-0169-00

Serial/Model No.

E f f

Disc

Q t y

LEFT SIDE (cont)

1 2 3 4 5

179-0435-00 101

179-0132-00 710

131-0086-00

131-0073-00

200-0110-00

134-0031-00

200-0112-00

200-0111-00

386-0647-00

337-0371-00

709

Description

2

2

2 i i i

2 i i i i i i i

CABLE HARNESS,

CABLE HARNESS, focus & intensity cable harness includes:

CONNECTOR, cable, anode connector includes:

CONNECTOR, CRT brush

CAP, CRT anode

PLUG, CRT contact (not shown)

COVER, CRT anode & plate cover includes:

COVER

PLATE

SHIELD, variable resistor

RESISTOR, variable mounting hardware for each: (not included w/resistor)

SCREW, 4-40 x 3/4 inch, RHS

LOCKWASHER, internal, #4

TUBE, spacer, 9/16 inch

13

14

15

16

17

18

19

20

200-0293-00 X140

635-0427-00

369-0015-00

147-0022-00

212-0022-00

166-0006-00

210-0008-00

210-0409-00

426-0046-00

348-0008-00

210-0008-00

210-0409-00

354-0051-00

213-0104-00

366-0032-00

213-0004-00

355-0049-00

406-0368-00 101

406-0729-00 810

211-0507-00

210-0803-00

809

2

2

2

2

1

1

1

1

SEE DELAY LINE PAGE

COVER, capacitor

ASSEMBLY, fan motor assembly includes:

FAN, 5 1/2 inches, clockwise

MOTOR, 115 V mounting hardware: (not included w/motor)

SCREW, 8-32 x 1 1/2 inches, RHS

TUBE, spacer, 7/16 inch

LOCKWASHER, internal, #8

NUT, hex., 8-32 x 5/16 inch

1

3

6

6

MOUNT, fan motor mounting hardware: (not included w/mount)

SHOCKMOUNT

LOCKWASHER, internal, #8

NUT, hex., 8-32 x 5/16 inch

1

6

RING, fan mounting hardware: (not included w/assembly)

SCREW, thread forming, #6 x 3/8 inch, THS

2

2

1

1

1

1

1

KNOB, small red knob includes:

SCREW, set, 6-32 x 3/16 inch, HSS

STUD, CRT rotator

BRACKET,

BRACKET, CRT support mounting hardware: (not included w/bracket)

SCREW, 6-32 x 5/16 inch, PHS

WASHER, flat, 0.150 ID x 3/8 inch OD

7-16

Mechanical Parts List— Type 516

Fig. &

Index

21

No.

22

23

Tektronix

Part No.

Q

Serial/Model No.

t

E f f Disc y

LEFT SIDE (cont)

1 2 3 4 5

354-0103-00

210-0502-00

211-0560-00

210-0407-00

136-0046-00

387-0344-00

101

101

211-0038-00 101

136-0046-00 529

136-0117-00

131-0178-00

387-0393-00

213-0087-00

528

528

528

Description i

1

7

1

2 i i i i i

2

1

RING, plastic, clamping ring includes:

NUT, 10-32 x 3/8 inch

SCREW, 6-32 x 1 inch, RHS

NUT, hex., 6-32 x 1/4 inch

SOCKET, CRT

PLATE, socket back

SCREW, 4-40 x 5/16 inch, 100° csk, FHS

ASSEMBLY, CRT socket assembly includes:

SOCKET, CRT

CONNECTOR, cable end

PLATE, back

SCREW, thread cutting, 2-32 x 1/2 inch, RHS

7-17

Mechanical Paris Lit!— Type 516

BOTTOM

1

R IF .

N O .

P A R T N O .

S E R IA L /M O D E l N O .

EFF.

D IS C .

0

I r.

3 3 7 - 0 3 7 3 - 0 0

2 1 1 - 0 5 0 7 - 0 0

D E S C R IP T IO N i S H I E L D , c a l i b r a t o r

m o u n t i n g h a r d w a r e : (not I n c l u d e d w / s h l c l d )

2 S C R E W , 6 - 3 2 x 5 / 1 6 I n c h , P HS

2

3

2 1 2 - 0 5 4 5 - 0 0

2 1 0 - 0 8 1 2 - 0 0

2 1 0 - 0 0 1 0 - 0 0

2 1 0 - 0 5 6 4 - 0 0

4 0 6 - 0 5 7 8 - 0 0

4 0 6 - 0 5 7 9 - 0 0

4 0 6 - 0 6 5 6 - 0 0

2 1 1 - 0 5 0 7 - 0 0

2 1 1 - 0 5 2 2 - 0 0

2 1 0 - 0 2 0 3 - 0 0

2 1 0 - 0 4 5 7 - 0 0

101

101

2 01

2 0 0

2 0 0

1

-

T R A N S F O R M E R t r a n s f o r m e r I n c l u d e s :

S C R E W , 1 0 - 3 2 x 4 I n c h , H H S 4

4

-

W A S H E R , f i b e r , # 1 0 m o u n t i n g h a r d w a r e : (not I n c l u d e d w / t r a n s f o r m e r )

4 L O C K W A S H E R , I n t e r n a l , # 1 0

4 N U T , h e x . , 1 0 - 3 2 x 3 / 8 I n c h

1 B R A C K E T , t r a n s f o r m e r s u p p o r t , left

1 B R A C K E T , t r a n s f o r m e r s u p p o r t , r i g h t

1 B R A C K E T , t r a n s f o r m e r s u p p o r t

m o u n t i n g h a r d w a r e : (not I n c l u d e d w / b r a c k e t )

2 S C R E W , 6 - 3 2 x 5 / 1 6 Inch, P H S

2 S C R E W , 6 - 3 2 x 5 / 1 6 Inch, 100° c s k , F HS

1 L U G , s o l d e r , S E # 6 l o n g

2 N U T , k e p s , 6 - 3 2 x 5 / 1 6 I n c h

7-18

Mechanical Parts List— Type 516

Fig. &

Index Tektronix

No. Part No.

4

Serial/Model No.

Eff

122-0085-00 101

122-0092-00 201

212-0039-00

210-0458-00

Disc

200

Q

BOTTOM Icont)

1 2 3 4 5

Description

1 ANGLE, frame, bottom rail, right

1 ANGLE, frame, bottom rail, right

- mounting hardware: (not included w/angle)

4 SCREW, 8-32 x 3/8 inch, THS

4 NUT, keps, 8-32 x 11/32 inch

5

6

179-0428-00

381-0133-00

212-0043-00

1 CABLE HARNESS, 110 V

1 BAR, support mounting hardware: (not included w/bar)

2 SCREW, 8-32 x 1/2 inch, 100° csk, FHS

7

8

122-0086-00

212-0039-00

210-0458-00

384-0565-00

384-0194-00

1 ANGLE, frame, bottom rail, left

- mounting hardware: (not included w/angle)

4 SCREW, 8-32 x 3/8 inch, THS

4 NUT, keps, 8-32 x 11/32 inch

2 ROD, spacing, resistor mounting

2 ROD, extension (not shown)

7-19

Mechanical Parts List— Type 5 1 6

TOP

7-20

Mechanical Parts List— Type 516

Fig. &

Index Tektronix

No.

Part No.

1

2

348-0002-00

210-0202-00

211-0504-00

210-0407-00

Serial/Model No.

Eff Disc

TOP (cont)

Q t y

1 2 3 4 5

Description

1

1

1

1

GROMMET, rubber, 1/4 inch diameter

LUG, solder, SE #6 mounting hardware: (not included w/lug)

SCREW, 6-32 x 1/4 inch, PHS

NUT, hex., 6-32 x 1/4 inch

3 709

4

124-0093-00 101

355-0046-00

361-0009-00

124-0095-00 710

355-0046-00

361-0008-00

709

2 STRIP, ceramic, 3/4 inch h, w/5 notches

- each strip includes:

2 STUD, plastic

- mounting hardware for each: (not included w/strip)

2 SPACER, plastic, 0.406 inch long

2 STRIP, ceramic, 3/4 inch h, w/9 notches each strip includes:

2 STUD, plastic

- mounting hardware for each: (not included w/strip)

2 SPACER, plastic, 0.281 inch long

1

3

3

1

1

CHASSIS, focus & intensity

CHASSIS, focus & intensity mounting hardware: (not included w/chassis)

SCREW, 6-32 x 3/8 inch, 100° csk, FHS

SCREW, 6-32 x 5/16 inch, PHS

WASHER, flat, 0.150 ID x 3/8 inch OD

5

6

7

8

9

441-0318-00 101

441-0272-00 710

211-0559-00

211-0507-00

210-0803-00

124-0095-00

355-0046-00

361-0009-00

361-0008-00

131-0049-00

122-0060-00

211-0559-00

210-0457-00

381-0176-00 101

381-0199-00 1316

212-0039-00

381-0073-00

337-0318-00

211-0559-00

211-0507-00

210-0803-00

710

1315

2 STRIP, ceramic, 3/4 inch h, w/9 notches each strip includes:

2 STUD, plastic

- mounting hardware for each: (not included w/strip)

2 SPACER, plastic, 0.406 inch long

2 SPACER, plastic, 0.281 inch long

4

4

5

1

CONNECTOR, cable end

ANGLE, frame, top left mounting hardware: (not included w/angle)

SCREW, 6-32 x 3/8 inch, 100° csk, FHS

NUT, keps, 6-32 x 5/16 inch

1

1

4

2

BAR, top support w/handle

BAR, top support w/handle mounting hardware: (not included w/bar)

SCREW, 8-32 x 3/8 inch, THS

BAR, retaining

1

2

1

1

SHIELD, focus & intensity (not shown) mounting hardware: (not included w/shield)

SCREW, 6-32 x 3/8 inch, 100° csk, FHS

SCREW, 6-32 x 5/16 inch, PHS

WASHER, flat, 0.150 ID x 3/8 inch OD

(? )

7-21

M e c h a n ic a l P a r ti List— T yp e 5 1 6

SWEEP CHASSIS

REF.

N O .

P A R T N O .

S E R I A l/ M O D I L N O .

EFF.

D IS C .

a f

Y.

1 4 0 6 - 0 5 8 1 - 0 0

2 1 1 - 0 5 0 7 - 0 0

2 1 0 - 0 8 0 3 - 0 0

D E S C R IP T IO N l B R A C K E T , v a r i a b l e r e s i s t o r

m o u n t i n g h a r d w a r e : (not I n c l u d e d w / b r a c k e t )

2 S C R E W , 6 - 3 2 x 5 / 1 6 Inch, PHS

2 W A S H E R , f l a t , 0 . 1 5 0 I D x 3 / 8 I n c h 0 D

2

3

4

5

2 1 0 - 0 0 1 1 - 0 0

2 1 0 - 0 4 6 5 - 0 0

2 1 0 - 0 2 0 7 - 0 0

2 1 0 - 0 8 4 0 - 0 0

2 1 0 - 0 4 1 3 - 0 0

1 7 9 - 0 4 5 5 - 0 0

3 4 8 - 0 0 0 2 - 0 0

1 R E S I S T O R , v a r i a b l e

m o u n t i n g h a r d w a r e : (not I n c l u d e d w / r e s l s t o r )

1 L O C K W A S H E R , I n t e r n a l , 1 /4 ID x 1 5 / 3 2 I n c h O D

1 N U T , h e x . , 1 / 4 - 3 2 x 3 / 8 I n c h

-

6 R E S I S T O R , v a r i a b l e m o u n t i n g h a r d w a r e f or e a c h : (not I n c l u d e d w / r e s i s t o r )

1 L U G , s o l d e r , 3 / 8 I D x 5 / 8 i n c h O D , S E

1 W A S H E R , f l a t , 0 . 3 9 0 I D x 9 / 1 6 in c h 0 D

1 N U T , h e x . , 3 / 8 - 3 2 x 1/2 In c h

1 C A B L E H A R N E S S

6 G R O M M E T , r u b b e r , 1 /4 in c h d i a m e t e r

7-22

M e c h a n ic a l P arts List— Typ e 5 1 6

Fig. &

Index Tektronix

No. Part No.

6 136-0015-00

213-0044-00

Serial/Model No.

Eff Disc

SWEEP CHASSIS (c o n t)

Q t y 1 2 3 4 5

Description

8 SOCKET, tube, 9 pin, w/ground lugs

- mounting hardware for each: (not Included w/socket)

2 SCREW, thread forming, 5-32 x 3/16 inch, PHS

7 124-0088-00

355-0046-00

361-0009-00

1 STRIP, ceramic, 3/4 inch h, w/4 notches strip includes:

2 STUD, plastic

- mounting hardware: (not included w/strip)

2 SPACER, plastic, 0.406 inch long

8 .......................

386-0253-00

211-0534-00

210-0006-00

210-0407-00

9 124-0091-00

355-0046-00

361-0009-00

10 136-0008-00

213-0044-00

11 385-0060-00

211-0507-00

1

1

2

2

2

CAPACITOR mounting hardware: (not included w/capacitor)

PLATE, metal

SCREW, sems, 6-32 x 5/16 inch, PHS

LOCKWASHER, internal, #6

NUT, hex., 6-32 x 1/4 inch

2 STRIP, ceramic, 3/4 inch h, w/11 notches each strip includes:

2 SPACER, plastic

- mounting hardware for each: (not included w/strip)

2 SPACER, plastic, 0.406 inch long

2 SOCKET, tube, 7 pin, w/ground lugs

- mounting hardware for each: (not included w/socket)

2 SCREW, thread forming, 5-32 x 3/16 inch, PHS

2 ROD, plastic

- mounting hardware for each: (not included w/rod)

1 SCREW, 6-32 x 5/16 inch, PHS

337-0370-00

211-0503-00

210-0803-00

214-0210-00 X399

214-0209-00

361-0007-00

12 ...................

346-0001-00

210-0004-00

210-0406-00

1 SHIELD, high voltage (not shown)

- mounting hardware: (not included w/shield)

3 SCREW, 6-32 x 3/16 inch, PHS

3 WASHER, flat, 0.150 ID x 3/8 inch OD

1

1

1

ASSEMBLY, solder spool assembly includes:

SPOOL, w/o solder mounting hardware: (not included w/assembly)

SPACER, plastic, 0.188 inch long

1

1

2

2

TRANSFORMER mounting hardware: (not included w/transformer)

STRAP, mounting

LOCKWASHER, ft

NUT, hex., 4-40 x 3/16 inch

7-23

Mechanical Paris List— Type 516

Fig. &

Index

No.

Tektronix

Part No.

Serial/Model No.

E f f

Disc

SWEEP CHASSIS (coni)

Q t y 1 2 3 4 5

13 385-0076-00

385-0138-00

211-0507-00

213-0041-00

101

340

101

340

339

339

Description i ROD, plastic i ROD, plastic

mounting hardware: (not included w/rod) i SCREW, 6-32 x 5/16 inch, PHS i SCREW, thread cutting, 6-32 x 3/8 inch, THS

14 124-0090-00

355-0046-00

361-0009-00

14 STRIP, ceramic, 3/4 inch h. w/9 notches

each strip includes:

2 STUD, plastic

mounting hardware for each: (not included w/strip)

2 SPACER, plastic, 0.406 inch long

15 441-0319-00

441-0319-01

212-0040-00

210-0458-00

101

4050

4049 1 CHASSIS, sweep

1 CHASSIS,

mounting hardware: (not included w/chassis)

3 SCREW, 8-32 x 3/8 inch, 100° csk, FHS

1 NUT, keps, 8-32 x 11/32 inch

16

17

18

19

179-0427-00

179-0569-00

348-0012-00

348-0003-00

136-0015-00

211-0033-00

210-0004-00

210-0406-00

337-0005-00

101

630

629 1 CABLE HARNESS, sweep

1 CABLE HARNESS, sweep

1 GROMMET, rubber, 5/8 inch diameter

6 GROMMET, rubber, 5/16 inch diameter

3 SOCKET, tube, 9 pin, w/ground lugs

mounting hardware for each: (not included w/socket)

2 SCREW, sems, 4-40 x 5/16 inch, PHS

2 L0CKWASHER, internal, #4

2 NUT, hex., 4-40 x 3/16 inch

1 SHIELD, socket

20 406-0218-00

211-0507-00

210-0006-00

210-0407-00

21 385-0096-00

385-0136-00

211-0507-00

213-0041-00

101

340

101

340

22 348-0005-00

339

339

1 BRACKET, horizontal display switch

mounting hardware: (not included w/bracket)

2 SCREW, 6-32 x 5/16 inch, PHS

2 L0CKWASHER, internal, #6

2 NUT, hex., 6-32 x 1/4 inch

4 ROD, plastic

4 ROD, plastic

mounting hardware for each: (not included w/rod)

1 SCREW, 6-32 x 5/16 inch, PHS

1 SCREW, thread cutting, 6-32 x 3/8 inch, THS

2 GROMMET, rubber, 1/2 inch diameter

7-24

POWER & VERTICAL AMPLIFIER CHASSIS

Mechanical Parts List— Type 5 1 6

7-25

Mechanical Parts List— Type 516

Fig. &

Index

No.

1

Tektronix

Part No.

136-0037-00

210-0840-00

210-0413-00

Eff

POWER & VERTICAL AMPLIFIER CHASSIS (cont)

Serial/Model No.

Disc

Q

t

y

1 2 3 4 5

Description i i i

SOCKET, tip jack mounting hardware: (not included w/socket)

WASHER, flat, 0.390 ID x 9/16 inch OD

NUT, hex., 3/8-32 x 1/2 inch

2

210-0407-00

210-0006-00

210-0803-00

2

2

2 i CAPACITOR mounting hardware: (not included w/capacitor)

NUT, hex., 6-32 x 1/4 inch

LOCKWASHER, internal, #6

WASHER, flat, 0.150 ID x 3/8 inch OD

3 124-0089-00

355-0046-00

361-0009-00

10

2

2

STRIP, ceramic, 3/4 inch h, w/7 notches each strip includes:

STUD, plastic mounting hardware for each: (not included w/strip)

SPACER, plastic, 0.406 inch long

4 210-0201-00

213-0044-00

5 124-0088-00

355-0046-00

361-0009-00

6 385-0107-00

211-0014-00

210-0201-00

211-0011-00

7 124-0091-00

355-0046-00

361-0009-00

8

211-0544-00

210- 0478-00

211- 0507-00

1

1

LUG, solder, SE #4 mounting hardware: (not included w/lug)

SCREW, thread forming, 5-32 x 3/16 inch, PHS

4

2

2

STRIP, ceramic, 3/4 inch h, w/4 notches each strip includes:

STUD, plastic mounting hardware for each: (not included w/strip)

SPACER, plastic, 0.406 inch long

2

1

ROD, plastic, 3/4 inch (not shown) mounting hardware for each: (not included w/rod)

SCREW, 4-40 x 1/2 inch, PHS

2

1

LUG, solder, SE #4 mounting hardware for each: (not included w/lug)

SCREW, 4-40 x 5/16 inch, PHS

8

2

2

STRIP, ceramic, 3/4 inch h, w/11 notches each strip includes:

STUD, plastic mounting hardware for each: (not included w/strip)

SPACER, plastic, 0.406 inch long

3

1

1

1

RESISTOR mounting hardware for each: (not included w/resistor)

SCREW, 6-32 x 3/4 inch, THS

NUT, hex., 5/16 x.21/32 inch long

isfiii n 15/io mi,

m>

Mechanical Parts List— Type 516

Fig. &

Index Tektronix

No. Part No.

POWER & VERTICAL AMPLIFIER CHASSIS (c o n t)

Q

Serial/Model No. t Description

Eff_______Disc______ y

1 2 3 4 5

_____________________

9 ..........

386-0254-00

432-0044-00 XI6

211-0543-00

211-0514-00

101

1600

211-0543-00 3450

210-0006-00

210-0407-00

3449X

1599

3449

1 CAPACITOR

mounting hardware: (not included w/capacitor)

1 PLATE, fiber, large

1 BASE

2 SCREW, 6-32 x 5/16 inch, RHS

2 SCREW, 6-32 x 3/4 inch, PHS

2 SCREW, 6-32 x 5/16 inch, RHS

2 LOCKWASHER, internal, #6

2 NUT, hex., 6-32 x 1/4 inch

10 ..........

386-0255-00

211-0534-00

210-0006-00

210-0407-00

1 CAPACITOR

mounting hardware: (not included w/capacitor)

1 PLATE, metal

2 SCREW, sems, 6-32 x 5/16 inch, PHS

2 LOCKWASHER, internal, #6

2 NUT, hex., 6-32 x 1/4 inch

11 ..........

386-0252-00

211-0534-00

210-0006-00

210-0407-00

12 ..........

386-0253-00

211-0534-00

210-0006-00

210-0407-00

13 ..........

386-0254-00

211-0543-00

210-0006-00

210-0407-00

14

15

179-0426-00

441-0320-00 101

441-0320-01 4330

212-0040-00

210-0458-00

16 385-0107-00

211-0014-00

4329

1 CAPACITOR

mounting hardware: (not included w/capacitor)

1 PLATE, fiber

2 SCREW, sems, 6-32 x 5/16 inch, PHS

2 LOCKWASHER, internal, #6

2 NUT, hex., 6-32 x 1/4 inch

1 CAPACITOR

mounting hardware: (not included w/capacitor)

1 PLATE, metal

2 SCREW, sems, 6-32 x 5/16 inch, PHS

2 LOCKWASHER, internal, #6

2 NUT, hex., 6-32 x 1/4 inch

1 CAPACITOR

mounting hardware: (not included w/capacitor)

1 PLATE, fiber

2 SCREW, 6-32 x 5/16 inch, RHS

2 LOCKWASHER, internal, #6

2 NUT, hex., 6-32 x 1/4 inch

1 CABLE HARNESS, power

1 CHASSIS, power & vertical amplifier

1 CHASSIS, power & vertical amplifier

mounting hardware: (not included w/chassis)

8 SCREW, 8-32 x 3/8 inch, 100° csk, FHS

8 NUT, keps, 8-32 x 11/32 inch

1 ROD, plastic, 3/4 inch (not shown)

- mounting hardware: (not included w/rod)

1 SCREW, 4-40 x 1/2 inch, PHS

M e c h a n ic a l Parts List— Typ e 5 1 6

Fig. &

Index Tektronix

No.

Part No.

Eff

POWER & VERTICAL AMPLIFIER CHASSIS (c o n tl

Seriul/Model No.

Disc

Q t y

1 2 3 4 5

Description

210-0204-00

211-0011-00 i i mounting hardware: (not included w/lug)

SCREW, 4-40 x 5/16 inch, PHS

17

18

276-0506-00

384-0542-00

211-0507-00

2

4

1

CORE, iron, threaded, 10-32 x 5/16 inch

ROD, plastic, capacitor mounting mounting hardware for each: (not included w/rod)

SCREW, 6-32 x 5/16 inch, PHS

19 124-0087-00

355-0046-00

361-0009-00

1

1

1

STRIP, ceramic, 3/4 inch h, w/3 notches strip includes:

STUD, plastic mounting hardware: (not included w/strip)

SPACER, plastic, 0.406 inch

20 406-0577-00

211-0507-00

1

2 mounting hardware: (not included w/bracket)

SCREW, 6-32 x 5/16 inch, PHS

21

22

348-0005-00

337-0372-00

211-0008-00

210-0004-00

210-0406-00

2

2

2

2

1

GROMMET, rubber, 1/2 inch

SHIELD, polarity mounting hardware: (not included w/shield)

SCREW, 4-40 x 1/4 inch, PHS

L0CKWASHER, internal, #4

NUT, hex., 4-40 x 3/16 inch

23 210-0202-00

211-0504-00

210-0407-00

24

210-0011-00

210-0465-00

25 406-0576-00

211-0008-00

210-0004-00

210-0406-00

26 136-0015-00 101

136-0145-00 1700

213-0044-00

1699

2

1

1

LUG, solder, SE #6 mounting hardware for each: (not included w/lug)

SCREW, 6-32 x 1/4 inch, PHS

NUT, hex., 6-32 x 1/4 inch

1

1

1

RESISTOR, variable mounting hardware: (not included w/resistor)

L0CKWASHER, internal, 1/4 ID x 15/32 inch OD

NUT, hex., 1/4-32 x 3/8 inch

2

2

2

1 BRACKET, variable resistor mounting hardware: (not included w/bracket)

SCREW, 4-40 x 1/4 inch, PHS

L0CKWASHER, internal, #4

NUT, hex., 4-40 x 3/16 inch

2

2

2

SOCKET, tube, 9 pin, w/ground lugs

SOCKET, tube, 9 pin, w/ground lugs mounting hardware for each: (not included w/socket)

SCREW, thread forming, 5-32 x 3/16 inch, PHS

7 -2 8

Mechanical Parts List— Type 516

POW ER & VERTICAL AMPLIFIER CHASSIS ( c o n tl i i • m

Index Tektronix

No.

27

28

Part No.

348-0044-00

136-0015-00

213-0044-00

Serial/Model No. t

Eff_______ Disc_______ y

1 2 3 4 5

Description

GROMMET, rubber, 3/8 inch diameter

SOCKET, tube, 9 pin, w/ground lugs mounting hardware for each: (not included w/socket)

SCREW, thread forming, 5-32 x 3/16 inch, PHS

29

213-0035-00

2

1

COIL mounting hardware for each: (not included w/coil)

SCREW, thread cutting, 4-40 x 1/4 inch, PHS

30

31

348-0003-00

.......................

210-0840-00

210-0444-00

4

1

1

1

GROMMET, rubber, 5/16 inch diameter

RESISTOR, variable mounting hardware: (not included w/resistor)

WASHER, flat, 0.390 ID x 9/16 inch OD

NUT, hex., 3/8-32 x 1/2 inch

32 406-0024-00

211-0507-00

210-0006-00

210-0407-00

1

2

2

2

BRACKET, variable resistor mounting hardware: (not included w/bracket)

SCREW, 6-32 x 5/16 inch, PHS

LOCKWASHER, internal, #6

NUT, hex., 6-32 x 1/4 inch

33 136-0011-00

211-0538-00

210-0006-00

210-0407-00

34 136-0008-00

213-0044-00

35 ...................

211-0553-00

210-0601-00

210- 0478-00

211- 0507-00

36

........................................-

212-0037-00

210-0809-00 101

210-0808-00 5170

210-0008-00

210-0462-00

212-0004-00

5169

2

2

2

2

SOCKET, tube, 8 pin mounting hardware for each: (not included w/socket)

SCREW, 6-32 x 5/16 inch, 100° csk, FHS

LOCKWASHER, internal, #6

NUT, hex., 6-32 x 1/4 inch

5

2

SOCKET, tube, 7 pin, w/ground lugs mounting hardware for each: (not included w/socket)

SCREW, thread forming, 5-32 x 3/16 inch, PHS

2

1

1

1

1

RESISTOR mounting hardware for each: (not included w/resistor)

SCREW, 6-32 x 1 1/2 inches, RHS

EYELET

NUT, hex., 5/16 x 21/32 inch long

SCREW, 6-32 x 5/16 inch, PHS

1

1

1

1

1

1

2 RESISTOR mounting hardware for each: (not included w/resistor)

SCREW, 8-32 x 1 3/4 inches, FIL HS

WASHER, centering

WASHER, centering

LOCKWASHER, internal, #8

NUT, hex., 8-32 x 1/2 x 23/64 inch

SCREW, 8-32 x 5/16 inch, PHS

7-29

Mechanical Parts List— Type 516

Fig. &

Index Tektronix

No.

Part No.

POWER & VERTICAL AMPLIFIER CHASSIS (cont)

Q

Serial/Model No. t

Eff Disc y

1 2 3 4 5

Description

37

38

39

40

41

200-0258-00

200-0257-00

200-0261-00 101

200-0259-00 1600

200-0293-00 3200

200-0258-00 3450

348-0006-00 101

348-0050-00 5070

385-0092-00 101

385-0137-00 340

211-0507-00

213-0041-00

101

340

1599

3199

3449

5069

339

339 i i i i i i i i i i i i

COVER, capacitor

COVER, capacitor

COVER, capacitor, 4 1/16 inches

COVER, capacitor, 3 9/16 inches

COVER, capacitor, 2 9/16 inches

COVER, capacitor, 3 1/32 inches

GROMMET, rubber, 3/4 inch diameter

GROMMET, plastic, 3/4 inch diameter

ROD, plastic

ROD, plastic mounting hardware: (not included w/rod)

SCREW, 6-32 x 5/16 inch, PHS

SCREW, thread cutting, 6-32 x 3/8 inch, THS

42

43

210-0840-00

210-0413-00

407-0277-00 X3930

124-0187-00 X3930

355-0046-00

124-0187-01 X3930

355-0046-00

361-0007-00 X3930

1

1

1

RESISTOR, variable mounting hardware: (not included w/resistor)

WASHER, flat, 0.390 ID x 9/16 inch OD

NUT, hex., 3/8-32 x 1/2 inch

1

1

1

2

1

2

4

CAPACITOR capacitor includes:

BRACKET, capacitor

STRIP, ceramic, 7/16 inch h, w/5 notches strip includes:

STUD, plastic

STRIP, ceramic, 7/16 inch h, w/5 notches & silver band strip includes:

STUD, plastic

SPACER, plastic, 0.188 inch long

7-30 f a

DELAY LINE

M e c h a n ic a l P a rt* List— T yp e 5 1 6

1

R IF .

N O .

P A R T N O .

S E R I A l/ M O D E l N O .

IF F .

D IS C .

0

» y

3 8 6 - 0 4 8 8 - 0 0

2 1 1 - 0 5 1 0 - 0 0

2 1 0 - 0 8 0 3 - 0 0

D E S C R IP T IO N i P L A T E , w h i t e p l a s t i c

m o u n t i n g h a r d w a r e : (not I n c l u d e d w / p l a t e )

2 S C R E W , 6 - 3 2 x 3 / 8 i nch, P HS

2 W A S H E R , f l a t , 0 . 1 5 0 ID x 3 / 8 i n c h 0 D

2 4 4 1 - 0 1 3 1 - 0 0

2 1 1 - 0 5 0 4 - 0 0

I C H A S S I S

m o u n t i n g h a r d w a r e : (not I n c l u d e d w / c h a s s l s )

4 S C R E W , 6 - 3 2 x 1 /4 i nch, P H S

3

4

3 5 2 - 0 0 1 6 - 0 0

3 5 2 - 0 0 1 7 - 0 0

3 3 7 - 0 3 6 8 - 0 0

2 1 1 - 0 5 0 7 - 0 0

8

8

1

-

2

H O L D E R , c o l l f o r m , w / o p i n

H O L D E R , c o i l f o r m , w / p l n

S H I E L D m o u n t i n g h a r d w a r e : (not I n c l u d e d w / s h l e l d )

S C R E W , 6 - 3 2 x 5 / 1 6 i n c h , P H S

5 4 4 1 - 0 1 2 9 - 0 0

2 1 1 - 0 5 0 7 - 0 0

6 3 8 6 - 0 4 8 7 - 0 0

2 1 1 - 0 0 1 1 - 0 0

7 3 8 4 - 0 5 3 1 - 0 0

2 1 1 - 0 0 1 1 - 0 0

1

-

3

C H A S S I S m o u n t i n g h a r d w a r e : (not I n c l u d e d w / c h a s s i s )

S C R E W , 6 - 3 2 x 5 / 1 6 i n c h , P H S

1 P L A T E , p l a s t i c

m o u n t i n g h a r d w a r e : (not I n c l u d e d w / p l a t e )

3 S C R E W , 4 - 4 0 x 5 / 1 6 , P HS

8 R O D , s p a c i n g , p l a s t i c

m o u n t i n g h a r d w a r e f o r e a c h : (n o t I n c l u d e d w / r o d )

1 S C R E W , 4 - 4 0 x 5 / 1 6 i n c h , P H S

7-31

Mechanical Paris List— Type 516

Fig. &

Index

No.

Tektronix

Part No.

DELAY LINE

Q

Serial/Model No. t

Eff Disc y

1 2 3 4 5

8 386-0486-00

211-0011-00

Description

1

2

PLATE, plastic mounting hardware: (not included w/plate)

SCREW, 4-40 x 5/16, PHS

9

10

348-0002-00

386-0485-00

211-0011-00

1

1

3

GROMMET, rubber, 1/4 inch diameter (not shown)

PLATE, plastic mounting hardware: (not included w/plate)

SCREW, 4-40 x 5/16 inch, PHS

11 124-0086-00

355-0046-00

361-0009-00

X140

X140

1

1

1

STRIP, ceramic, 3/4 inch h, w/2 notches strip includes:

STUD, plastic mounting hardware: (not included w/strip)

SPACER, plastic, 0.406 inch long

12 406-0220-00

211-0504-00

210-0803-00

1

1

1 mounting hardware: (not included w/bracket)

SCREW, 6-32 x 1/4 inch, PHS

WASHER, flat, 0.150 ID x 3/8 inch OD

7-32

(?)

«/n 101 - 2240

TURRET ATTENUATOR-B

M e c h a n ic a l P arts List— T yp e 5 1 6

s/n 2241 - up

2

3

REF.

N O .

1

P A R T N O .

2 6 3 - 0 0 0 3 - 0 0

3 8 7 - 0 4 2 1 - 0 0

3 8 7 - 0 6 9 2 - 0 0

2 1 1 - 0 0 0 7 - 0 0

2 1 0 - 0 0 0 3 - 0 0

S E R IA L M O D E L N O .

EFF.

D IS C .

0

I

Y.

101

2 0 6 0

2 0 5 9

D E S C R IP T IO N l l l

2

2

S W I T C H , w i r e d - - V O L T S / D I V C H A N N E L " B " s w i t c h i n c l u d e s :

P L A T E , t u r r e t c o n t a c t

P L A T E , t u r r e t c o n t a c t m o u n t i n g h a r d w a r e : (not i n c l u d e d w / p i a t e )

S C R E W , 4 - 4 0 x 3 / 1 6 inch, Ills

L O C K W A S H E R , e x t e r n a l , # 4

4

2 1 4 - 0 1 3 4 - 0 0

4 2 6 - 0 0 7 6 - 0 0

4 2 6 - 0 1 8 9 - 0 0

4 2 6 - 0 1 9 5 - 0 0

101

101

2 0 6 0

2 2 4 1

X 2 2 4 1

X 2 2 4 1

X 2 2 4 1

5

6

7

8

9

10

11

12

2 1 4 - 0 3 2 4 - 0 0

2 1 1 - 0 0 9 7 - 0 0

2 1 0 - 0 5 8 9 - 0 0

3 8 4 - 0 2 3 5 - 0 0

2 1 4 - 0 0 8 8 - 0 0

2 1 4 - 0 1 8 9 - 0 0

2 1 1 - 0 5 6 3 - 0 0

4 0 1 - 0 0 1 7 - 0 0

4 0 1 - 0 0 2 5 - 0 0

2 1 3 - 0 0 2 2 - 0 0

2 0 4 - 0 0 6 8 - 0 0

2 0 4 - 0 1 2 9 - 0 0

2 0 0 - 0 1 9 1 - 0 0

2 0 4 - 0 0 2 4 - 0 0

2 0 4 - 0 1 2 7 - 0 0

3 5 4 - 0 2 0 6 - 0 0

2 1 Q - Q 4 1 9 - Q Q

101

101

101

2 2 4 1

101

2 0 6 0

101

2 0 6 0

X 2 2 4 1

2 2 4 0 X

2 0 5 9

2 2 4 0

2 2 4 0 X

2 2 4 0 X

2 0 5 9

2 0 5 9

2 0 5 9

I

I

1

1

1

1

1

I

I

1

1

S P R I N G , t h r u s t

F R A M E , t u r r e t

F R A M E , t u r r e t

F R A M E , t u r r e t f r a m e I n c l u d e s :

S P R I N G , d e t e n t

S C R E W , 4 - 4 0 x 5 / 1 6 inch, PH S

N U T , l o c k i n g , 4 - 4 0 x 1 /4 inch

R O D , s h a f t

S P R I N G , e x t e n s i o n

C A R R I E R , d e t e n t m o u n t i n g h a r d w a r e : (n o t i n c l u d e d w / c a r r l e r )

S C R E W , 6 - 3 2 x 9 / 3 2 i n c h , C R S s h o u l d e r

2

18

18

1

1

1

1

1

1

_ 1

W H E E L , d e t e n t

W H E E L , d e t e n t

S C R E W , se t , 4 - 4 0 x 3 / 1 6 inch, H S S

B O D Y , w i r e d t u r r e t a s s e m b l y

B O D Y , w i r e d t u r r e t a s s e m b l y b o d y I n c l u d e s :

C A P , e nd

B O D Y , c a p a c i t o r b a r r e l

B O D Y

R I N G , s t o p , d e t e n t m o u n t i n g h a r d w a r e : (not i n c l u d e d w / s w i t c h )

N U T , h e x . . 3 / 8 - 3 2 x 1/2 inch______________________

7 -3 3

Mechanical Parts List— Type 516

s/n 1C1 - 2240

TURRET ATTENUATOR-A s/n 2241 - up

R IF .

N O .

P A R T N O .

S E R I A l/ M O D E l N O .

IF F .

D IS C .

0

I y

D E S C R IP T IO N

1

2

3

4

5

6

7

8

9

10

11

12

2 6 3 - 0 0 0 1 - 0 0

2 0 4 - 0 0 6 8 - 0 0

2 0 4 - 0 1 2 9 - 0 0

2 0 0 - 0 1 9 1 - 0 0

2 0 4 - 0 0 2 4 - 0 0

2 0 4 - 0 1 2 7 - 0 0

4 0 1 - 0 0 1 7 - 0 0

4 0 1 - 0 0 2 5 - 0 0

2 1 3 - 0 0 2 2 - 0 0

2 1 4 - 0 1 8 9 - 0 0

2 1 1 - 0 5 6 3 - 0 0

2 1 4 - 0 0 8 8 - 0 0

3 8 4 - 0 2 3 5 - 0 0

4 2 6 - 0 0 7 6 - 0 0

4 2 6 - 0 1 8 9 - 0 0

4 2 6 - 0 1 9 5 - 0 0

2 1 4 - 0 3 2 4 - 0 0

2 1 1 - 0 0 9 7 - 0 0

2 1 0 - 0 5 8 9 - 0 0

2 1 4 - 0 1 3 4 - 0 0

3 8 7 - 0 4 2 0 - 0 0

3 8 7 - 0 6 9 1 - 0 0

2 1 1 - 0 0 0 7 - 0 0

2 1 0 - 0 0 0 3 - 0 0

3 5 4 - 0 2 0 6 - 0 0

2 1 0 - 0 4 1 9 - 0 0

101

2 0 6 0

101

2 0 6 0

101

2 2 4 1

101

101

101

2 0 6 0

2 2 4 1

X 2 2 4 1

X 2 2 4 1

X 2 2 4 1

101

101

2 0 6 0

X 2 2 4 1

2 0 5 9

2 0 5 9

2 2 4 0

2 2 4 0 X 1

-

1

1

1

2

18

18

1 i S W I T C H , w i r e d -- V O L T S / D 1 V , C H A N N E L " A "

s w i t c h i n c l u d e s : i i

-

B O D Y , w i r e d t u r r e t a s s e m b l y

B O D Y , w i r e d t u r r e t a s s e m b l y b o d y I n c l u d e s :

C A P , e n d

B O D Y , c a p a c i t o r b a r r e l

B O D Y , c a p a c i t o r b a r r e l

W H E E L , d e t o n t

W H E E L , d e t e n t

S C R E W , set, 4 - 4 0 x 3 / 1 6 i nch, H S S

C A R R I E R , d e t e n t a s s e m b l y m o u n t i n g h a r d w a r e : (not I n c l u d e d w / c a r r l e r )

S C R E W , 6 - 3 2 x 9 / 3 2 i n c h , C R S s h o u l d e r

2 2 4 0 X

2 0 5 9

2 2 4 0

2 2 4 0 X

2 0 5 9

-

1

1

1

1

1

1

2

2

I

1

I

1

1

-

S P R I N C , e x t e n s i o n

R O D , s h a f t

F R A M E , t u r r e t

F R A M E , t u r r e t

F R A M E , t u r r e t f r a m e I n c l u d e s :

S P R I N G , d e t e n t

S C R E W , 4 - 4 0 x 5 / 1 6 i n c h , P H S

N U T , l o c k i n g , 4 - 4 0 x 1 / 4 inch

S P R I N C , t h r u s t

P L A T E , t u r r e t c o n t a c t

P L A T E , t u r r e t c o n t a c t m o u n t i n g h a r d w a r e : (not I n c l u d e d w / p l a t e )

S C R E W , 4 - 4 0 x 3 / 1 6 i n c h , P H S

L O C K W A S H E R , e x t e r n a l , # 4

I R I N G , s t o p , d e t e n t

m o u n t i n g h a r d w a r e : (not I n c l u d e d w / s w i t c h )

1 N U T , h e x . , 3 / 8 - 3 2 x 1 /2 in c h

7 - 3 4

CABINET

M e c h a n ic a l P arts List— T yp e 5 1 6

REF.

N O .

P A R T N O .

S E R IA L /M O D E L N O .

EFF.

D IS C .

Q

T

Y.

1 387-0222-00

214-0057-00

105-0007-00

210-0480-00

210-0847-00

213-0033-00

2 387-0067-00

214-0057-00

105-0007-00

210-0480-00

210-0847-00

213-0033-00

3 387-0223-00

214-0057-00

105-0007-00

210-0480-00

210-0847-00

213-0033-00

D E S C R IP T IO N l PLATE, cabinet side, left

plate includes:

2

-

FASTENER, cabinet latch assembly fastener includes:

1

1

1

1

1 PLATE, cabinet bottom

plate includes:

4

-

STOP

NUT, latch

WASHER, plastic, 0.164 ID x 0.500 inch OD

SCREW, 8-32 x 1/2 inch

FASTENER, cabinet latch assembly fastener includes:

1

1

1

1

1

STOP

NUT, latch

1

-

WASHER, plastic, 0.164 ID x 0.500 inch OD

1 SCREW, 8-32 x 1/2 inch

1 PLATE, cabinet side, right plate includes:

2

-

1

FASTENER, cabinet latch assembly fastener includes:

STOP

NUT, latch

WASHER, plastic, 0.164 ID x 0.500 inch OD

SCREW, 8-32 x 1/2 inch

7-35

Mechanical Parts List— Type 516

STANDARD ACCESSORIES

1

2

3

4

5

6

7

8

9

Fig. &

Index

No.

Tektronix

Part No.

Serial/Model No.

Eff Disc

Q t y

1 2 3 4 5

161-0010-00 101

161-0010-03

103-0013-00

4130

012-0091-00 X3050

012-0031-00 X2270

012-0087-00

013-0004-00 101

103-0033-00 2030

012-0092-00 X3050

010-0127-00

378-0514-00 101

378-0567-00 3520

070-0225-01

4129

3049

2029

3049X

3519

Description

i i i i

CORD, power, 16 guage, 8 foot, 3 wire

CORD, power, 16 guage, 8 foot, 3 wire

ADAPTER, power cord, 3 to 2 wire

CORD, patch, BNC to banana, red, 18 inches long i i

CORD, patch-banana, 18 inches, red

CORD, patch, BNC to BNC, red, 18 inches long

2 ADAPTER, binding post

2 ADAPTER, BNC to binding post

1 JACK, BNC

2 PROBE, P6006, 10 MEG, 10X, 42 inches, BNC

1 FILTER, light, plastic, 5 inches, green, w/cam hole

1 FILTER, light, smoke gray

2 MANUAL, instruction (not shown)

7-36

BHB

BHS cap.

cer comp

HHS

HSB

HSS

ID incd

FHS

Fil HB

Fil HS h hex.

HHB conn

CRT csk

DE dia div elect.

EMC

EMT ext

F & 1

FHB binding head brass binding head steel capacitor ceramic composition connector cathode-ray tube countersunk double end diameter division electrolytic electrolytic, metal cased electrolytic, metal tubular external focus and intensity flat head brass flat head steel fillister head brass fillister head steel height or high hexagonal hex head brass hex head steel hex socket brass hex socket steel inside diameter incandescent

PARTS LIST ABBREVIATIONS int ig met.

mtg hdw

OD

OHB

OHS

PHB

PHS piste

PMC poly

SW

TC

THB thk

THS tub.

var w

W W prec

PT

PTM

RHB

RHS

SE

SN or S/N internal length or long metal mounting hardware outside diameter oval head brass oval head steel pan head brass pan head steel plastic paper, metal cased polystyrene precision paper, tubular paper or plastic, tubular, round head brass round head steel single end serial number switch temperature compensated truss head brass thick truss head steel tubular variable wide or width wire-wound

PARTS ORDERING INFORMATION

Replacement parts are available from or through your local Tektronix, Inc. Field

Office or representative.

Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available, and to give you the benefit of the latest circuit improvements developed in our engineering department. It is therefore important, when ordering parts, to include the following information in your order: Part number, instrument type or number, serial or model number, and modification number if applicable.

If a part you have ordered has been replaced with a new or improved part, your local Tektronix, Inc. Field Office or representative will contact you concerning any change in part number.

xooo

00 X

*

000

-

0000-00

Use 000-0000-00

O

SPECIAL NOTES AND SYMBOLS

Part first added at this serial number

Part removed after this serial number

Asterisk preceding Tektronix Part Number indicates manufactured by or for Tektronix, Inc., or reworked or checked components.

Part number indicated is direct replacement.

Screwdriver adjustment.

Control, adjustment or connector.

Type 5 1 6

SECTION 8

ELECTRICAL PARTS LIST

B542

B542

B590

B594

B601

B602

B603

Ckt. No.

B160W

B160W

B167

B171

B346

B346

B364

B384

B442

B442

B493

B494

Values fixed unless marked variable.

S/N Range

101-3619

3620-up

101-3619

3620-up

101-3619

3620-up

101-3619

3620-up

X3150-3340X

X3150-3340X

NE23

NE-2V

NE23

NE23

NE23

NE-2V

NE23

NE23

NE23

NE-2V

NE23

NE23

NE23

NE-2V

NE23

NE23

Graticule Light

Graticule Light

Pilot Light Assembly

Bulbs

Descripition

Tolerance ± 2 0 % unless otherwise indicated.

Cl

C2

CIO

C ll

C15

C21

XI 959-up

X270-up

4.7 pf

.1 /if

.01 /if lOOpf

.001 /if

.01 /if

C24

C25

C31

C37

C 44

C47

Cl 34

C138

C141

Cl 49

Cl 50

C160A

C160B

C160C

C160D

C160E lOOpf

.001 /if

.01 /if

18 pf

27 pf

.005/if

8 pf

.01 /if

5.6 pf

.005 /if

56 pf

3-12 pf

82 pf

4.5-25 pf

82 pf

4.5-25 pf

Capacitors

Cer.

Cer.

MT

Cer.

Discap

MT

Cer.

Discap

Hi-Kap

Cer.

Cer.

Discap

Cer.

Discap

Cer.

Discap

Cer.

Cer.

Mica

Cer.

Mica

Cer.

Var

Var.

Var.

500 v

500 v

400 v

350 v

500 v

500 v

350 v

500 v

150 v

500 v

500 v

500 v

500 v

500 v

500 v

500 v

500 v

500 v

500 v

± 1 pf

10%

± 5 .4 pf

± 0 .5 pf

± 1 0 %

± 5 .6 pf

5%

5%

Tektronix

Part Number

Use 150-027

150-0030-00

Use 150-027

Use 150-027

Use 150-027

150-0030-00

Use 150-027

Use 150-027

Use 150-027

150-0030-00

Use 150-027

Use 150-027

Use 150-027

150-0030-00

150-0027-00

150-0027-00

150-001

150-001

136-031

281-501

283-008

285-510

281-523

283-000

283-002

281-523

283-000

283-003

281-542

281-513

283-001

281-503

283-002

281-544

283-001

281-521

281-007

283-534

281-010

283-534

281-010

8-1

a ®

C491

C500

C503 cm

8-2

Ckt. No.

C160F

C160G

)

C160H \

C160J

)

C160F \

C160G (

C160H

(

C160J

/

Cl 65

Cl 67

C180A

C180B

C180C

C180D

C180E

C181

Cl 81

Cl 90

Cl 96

C224

C260

C330

C340

C355

C364

C381

C384

C400

C403

C404

C420

C421

C422

C430

C431

C450

C451

C454

C457

C462

C472

C480A-C484L

C485

C486

C488A,B

S/N Range

101-3929

101-3929

3930-up

101-4769

4770-up

101-569X

X570-up

X570-up

XI 24-up

XI 24-up

XI 40-up

101-569X

Electrical Parts List— Type 5 1 6

.1 f i f

39 pf

22 pf

12 pf

.001 f i f

3-12 pf

9-180 pf

4.5-25 pf

15 pf

1.5 pf

6.8 pf

.01

/ i f

3-12 pf

.1 i i f

.7-3 pf

.005

/ i f

.7-3 pf

.7-3 pf

.1

/ i f

1.8 pf

1.8 pf

.7-3 pf

.7-3 pf

.005

/ i f

.01

/ i f

.001 i i f

.001 f x i

.01 f i f

.1

/ i f

1 M f

0.001 /if

\

0.01

I X f (

0.1

1 f l f

I l f

1

(

470 pf

.001 f i f

180 i x f

.0022

/ i f

.022 f i f

.1 i i f

)

[

1

.001 i i f

.7-3 pf

.7-3 pf

3-12 pf

2 x 40 n f

.DU

.01 f i f

.1 i i f

.7-3 pf

.00V

Capacitors

( c o n t j

Description

Mylar

Mylar Timing Series

Timing Capacitor Assembly

Tub.

Tub.

PTM

Cer.

Cer.

Tub.

Tub.

Discap

Discap

Discap

Cer.

Discap

Mica

MT

MT

MT

MT

Cer.

Cer.

Cer.

Discap

Cer.

Mica

Cer.

Cer.

Cer.

Cer.

Discap

Cer.

MT

Tub.

Discap

Discap

Tub.

Tub.

Cer.

EMC

Var.

Var.

Var.

Var.

Var.

Var.

Var.

Var.

Var.

Var.

Var.

Var.

500 v

500 v

500 v

500 v

600 v

500 v

500 v

500 v

500 v

400 v

400 v

400 v

400 v

500 v

500 v

500 v

500 v

200 v

500 v

500 v

500 v

500 v

500 v

500 v

350 v

Discap

MT

Tub.

Discap

Var.

£lv

500 v

600 v

± ’/ 2%

± y 2 %

Tektronix

Part Number

*291-008

*291-007

± 9 4 pf

10%

5%

± 3 .9 pf

10%

± 1 .2 pf

± 1 .5 pf

± 0 .5 pf

10%

*295-0095-00

281-525

283-000

283-509

285-543

285-515

285-526

285-526

281-516

281-0511-00

281-506

283-000

281-009

281-023

281-010

281-509

281-526

281-541

283-002

281-009

285-587

281-027

283-001

281-027

281-027

285-572

281-557

281-557

281-027

281-027

283-001

283-002

283-000

283-000

(40) 281-037

281-037

281-031

Use 290-027

1 . 1

283-002

285-587

281-037

283-001

Ckt. No.

C520

C521

C522

C530

C531

C550

C551

C571

C580

C581

C584

C585

C586

C588

C594

C597

C601

C610

C617

C627

C640

C642

C644

C650

C666A,B

C670

C680

C681

C684

C801 A,B

C803

C807

C808

C821

C821

C827A,B

C827A,B

C831

C831

C832

C832

C841

C842

C842

C844

C844

C846

C848 c m

S/N Range

X570-up

X570-up

XI 24-up

XI 24-up

101-709

710-up

101-709

710-up

101-709

710-up

101-169

170-up

101-709

710-up

101-269

270-up

X710-up

101-709

710-up

.7-3 pf

.7-3 pt

.1 pf

1.8 pf

1.8 pf

.7-3 pf

.7-3 pf

.01 pf

10 pf

47 pf

.005 pf

10 pf

47 pf

.005 pf

12 pf

.01 pf

2 pf

.01 pf

.01 pf

2 x 20 pf

125 pf

2 x 125 pf

2 x 125 pf

.01 pf

.015 pf

.01 pf

.015 pf

.01 pf

.0068 pf

.0068 pf

.005 pf

.047 pf

.015 pf

.0068 pf

2 x 2 0 pf

.01 pf

.02 pf

.02 pf

.01 pf

2 x 20 pf

.001 pf

.001 pf

.001 pf

.015 pf

.01 pf

.001 pf

.0068 pf

.015 pf

.015 pi

Capacitors

( c o n t j

Cer.

Discap

Cer.

Cer.

Discap

Cer.

Discap

PMC

PTM

PTM

EMC

EMC

EMC

EMC

PTM

Discap

Discap

Discap

Discap

Discap

PTM

Cer.

MT

Discap

Discap

EMC

PTM

Discap

Discap

Discap

EMC

MT

MT

MT

Discap

Discap

Discap

Discap

Discap

Discap

Descripition

Tub.

Tub.

PTM

Cer.

Cer.

Var.

Var.

Tub.

Tub.

Discap

Cer.

Var.

Var.

200 v

500 v

500 v

500 v

500 v

500 v

500 v

500 v

500 v

500 v

500 v

500 v

236 v

400 v

400 v

450 v

350 v

350 v

350 v

400 v

450 v

400 v

600 v

600 v

500 v

450 v

600 v

1,000 v

1,000 v

2,500 v

3,000 v

2,000 v

3,000 v

2,000 v

3,000 v

3,000 v

4,000 v

400 v

2,500 v

3,000 v

2,000 v

3,000 v

3,000 v

2500 v

3,000 v

Electrical Parts List— Type 5 1 6

± 1 pf

± 4 .7 pf

± 4 .7 pf

± 1 .2 pf

Tektronix

Part Number

281-027

281-027

285-572

281-557

281-557

281-027

281-027

283-002

281-504

281-519

283-001

281-504

281-519

283-001

281-506

283-002

285-588

285-510

285-510

Use 290-010

Use 290-016

Use 290-130

Use 290-130

285-510

Use 290-010

285-510

283-006

283-006

283-002

Use 290-010

285-501

285-502

285-502

283-030

283-042

283-011

283-042

283-011

283-043

Use 283-034

283-034

285-519

283-030

283-043

Use 283-044

283-044

283-043

283-030

283-042

8-3

Electrical Parts List— Type 5 1 6

Ckt. No.

C863

C864

C871

C874

C885

F601

S/N Range

.01 nf

.01 /if

330 pf

330 pf

27 pf

Capacitors

( c o n t j

Descripition

Discap

Discap

Mica

Mica

Cer.

3.2 Amp

1.6 Amp

Fuses

3 AG Slo-Blo 117V Operation

3 AG Slo-Blo 234 V Operation

500 v

500 v

500 v

500 v

500 v

LR149

LR149

L455

L460

L460

L464

L470

L470

1474

L480A,B

L481 A,B

L482A,B

L484A,B

L485

L486

L555

101-4709

4710-up

101-123

124-up

101-123

124-up

850 Mh

1.2 mh

6.8-14.6 /th

1.4 fih

.5 /ih

7 ij .

h

1.4 /xh

.5 Mh

7fih

15 Section Delay Line

2.2 nh

14 Section Delay Line

11 Section Delay Line

7.3-16 /th

7.3-16/th

6.8-14.6 p.h

Inductors

R19

R20

R21

R22

R23

Resistors

Resistors are fixed Composition, ± 1 0 % unless otherwise indicated.

R1

R2

R3

R4

R5 XI 959-up

1 meg

560 k

50 k

100 k

10 meg

% w

V2w y 2 w

’A w

Var.

R13

R14

R15

R16

R171

X270-up

1 meg

100 k

470 k

100 k

100 k y 2 w y 2 w y 2 w y 2 w

Var.

1 meg

3.9 meg

820 k

100 fi

100 fi y 2 w

Vi w

'A w y 2 w

’A w

1R17 concentric with R110, R349 & SW110, furnished as a unit.

8-4

Fixed

Var.

Var.

Var.

Fixed

Fixed

Var.

Fixed

Fixed

Fixed

Fixed

Fixed

Fixed

10%

10%

Comp.

5%

Comp.

5%

Comp. DC Level Adj.

Comp.

Comp.

10%

10%

Comp.

Comp.

10%

10%

Comp.

Comp.

10%

10%

Comp. Trig. Level

Comp.

Comp.

Comp.

Comp.

Comp.

10%

10%

10%

10%

10%

Tektronix

Part Number

283-002

283-002

283-518

283-518

281-513

159-026

159-003

*108-058

*108-0164-00 core 276-506 *114-080

108-095

*108-170

*108-137

108-095

*108-170

*108-138

*108-108

*108-147

*108-107

*108-106 core 276-506 *114-054 core 276-506 *114-054 core 276-506 *114-080

©4

301-105

301-564

311-023

302-104

302-106

302-105

302-104

302-474

302-104

311-099

302-105

302-395

302-824

302-101

302-101

Resistors

(conf)

Ckt. No.

R24

R25

R26

R28

R29

R30

R31

R32

R34

R35

R41

R43

R44

R46

R47

R35

R37

R38

R39

R40

S/N Range

101-399

400-up

3.9 k

27 a

3.9 k

39 k

39 k

100k

1 0 0

a

220 k

1 k

2.2 k

2.2 k

150 k

120 k

100 k

2.2 meg

1 0 0

a

8 2 0

a

1 meg

22 k

500 a

Descripition

'A w

V i w

'A w

2 w

2 w

'A w

’/jW

V i W

'A w

'A w

'A w y 2 w y 2 w

V i w

'A w y

2

w y 2 w

1 w

.2 w

Var.

Var.

R48

R1102

R ill

R114

R131

R132

R133

R134

R135

R138

22 k

500 k

100 k

100 k

4.7 k

1 w y 2 w y 2 w

1 0 0

a

3.6 k

3.6 k i o o a

1 0 0 a

'A w

1 w

1 w y . w y . w

R140

R141

R143

R144

R146

R147

R148

R150

R152

R160A

X3870-up

47 a

43 k

33 k

10k

47 a

1 k

150 k

680 a

6.8 meg

100 k y 2 w

1 w

1 w

5 w

V i w y 2 w

1 w

V j W y 2 w

'A w

R160B

R160C

R160D

R160E

R160F

200 k

500 k

1 meg

2 meg

5 meg

'A w

'A w

V i w

'A w

'A w

2R110 concentric with R17, R349 & SW110, furnished as a unit.

Var.

Var.

© I

Electrical Parts List— Type 516

Comp.

Comp.

Comp.

Comp.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

W W

Comp.

Comp.

Comp. Stability

10%

Comp. Preset Stability

Comp.

Comp.

10%

10%

10%

5 %

5 %

10%

10%

10%

5 %

5 %

5 %

10%

10%

10%

10%

10%

1%

1%

1%

1%

1%

1 %

Comp.

Comp.

Comp.

Comp.

Comp.

10%

10%

10%

10%

10%

Tektronix

Part Number

302-392

302-270

302-392

306-393

306-393

Comp.

Comp.

Comp.

Comp.

Comp.

10%

10%

10%

10%

10%

Comp.

Comp.

5%

10%

Comp.

10%

Comp. Trig. Level Centering

Comp.

10%

Comp.

Comp.

10%

10%

Comp.

Comp.

10%

10%

Comp. Trig. Sensitivity

302-104

302-101

302-224

302-102

Use 301-222

301-222

302-154

302-124

311-026

302-225

302-101

302-821

302-105

304-223

311-066

304-223

311-099

311-173

302-104

302-472

302-101

303-362

303-362

302-101

302-101

302-470

303-433

303-333

308-054

302-470

302-102

304-154

302-681

302-0685-00

309-045

309-051

309-003

309-014

309-023

309-087

8-5

Electrical Parts List— Type 5 1 6

Resistors

( c o n l j

Ckt. No.

R160G

R160H

R160J

R160W

R160X

S/N Range

10 meg

10 meg

10 meg

100 k

8.2 k

Description

% w

Vi w

'/ iw y 2 w

V i w

R184

R185

R190

R191

R192

R194

R196

R197

Rl 98

R199

R225

R259

R330

R332

R333A,B

R160Y

R161

R165

R166

R167

R168

R171

R173

R174

R176

R178

R180A

R180B

R181

R183

R340

R341

R345

R346

R347

R3493

R351

R353

R355

R356

560 n

47 0

47 k

100k

120 k

100k

100 0

68 k

400 k

250 k y2 w y 2 w

2 w y 2 w

Vs w

% w

2w y 2 w

V j W

T O coitcontric with I I J , 1110 i E W I 10 , U J » cJ as a unik

8 -6

20 k lo o a

47 k

47 k

1.5 meg

470 k

100 fi

10k

2.2 k

2 k

6k

470 k

4.7 meg

4.7 meg

100 n

39 k

27 k

12k

22 k

47 £2

10k

100 k

47 £2

47 n

100 k

50 k

2.5 k

1.84 meg

1.5 meg

2 x 20 k y 2 w

1 w

1 w

Vi W

Vi w y 2 w

5 w

1 w

5 w

Vi w y 2 w y2 W y 2 w y 2 w

Vi w

1 k

2 w y 2 w y 2 w y 2 w y2 w y 2 w y 2 w

.1 w

.5 w y 2 w

V j w

Var.

Var.

Var.

Var.

Var.

Var.

Prec.

Prec.

Prec.

Comp.

Comp.

1%

1%

1%

10%

10%

W W Time/Div.

Comp.

10%

Comp.

Comp.

Comp.

10%

10%

10%

Comp.

10%

Comp.

W W

Comp.

10%

5%

10%

Comp. Sweep Length

W W

Comp.

Comp.

Comp.

Comp.

5%

10%

10%

10%

10%

Comp.

Comp.

Comp.

Comp.

Comp.

5%

5%

10%

10%

10%

Comp.

Comp.

Comp.

Comp.

Comp.

10%

10%

10%

10%

10%

Comp. Sweep Gain Adjust

Comp. Mag. Gain Adjust

Prec.

1%

Prec.

1%

Comp. Horiz. Position

Comp.

Comp.

Comp.

Comp.

Prec.

10%

10%

10%

10%

1%

Comp. Horiz. Input Atten.

Comp.

Comp.

Prec.

10%

10%

1%

Prec.

1%

Tektronix

Part Number

309-095

309-095

309-095

302-104

302-822

301-393

301-273

304-123

306-223

302-470

302-103

302-104

302-470

302-470

302-104

311-078

311-086

309-021

309-017

311-090

311-108

302-101

304-473

304-473

302-155

302-474

302-101

308-054

304-222

311-008

308-052

302-474

302-475

302-475

302-101

302-561

302-470

306-473

302-104

309-091

311-099

302-101 m m

309-126

309-109

®

5.6 k

5.6 k

100 k

100 k

47 Q

7— 35 k

47 ci

270 k

1 meg

100 k

50k

47 n

6— 30 k

47 ci

41.5 k

15k

15 k

10 k

22 k

24 k

47 Cl

47 n

220 n ioo a

39 k

39 k

200 n

47 Cl

1 k

600 f i

8.2 k

8.2 k

600 f i

3.5 k i oo n

550 ci lo o k is o k is o k

27 k

2 x 5 0 k

27 k

47 n

47 ci

47 ci

R420

R421

R422

R423

R424

R426

R427

R430

R432

R433

R434

R437

R438

R439

R440

R441

R442

R443

R444

R446

R447

R448

R450

R451

R454

Ckt.

No.

R358

R361

R364

R366

R368

R373

R376

R377

R380

R380

S/N Range

101-5289

5290-up

R381

R381

R382

R382

R383

101-5289

5290-up

101-5289

5290-up

R384

R386

R388

R403

R404

Electrical Parts List— Type 5 1 6

Resistors (cont)

>/2 w y2 w y2 w y2 w

1 w

2 w

2 w

2 w

5 w y 2w

1 w y2 w

5 w

2 w

% w y2 w y2 w y2 w y2 w

7 w y2 w

1 w

’/ 2 w y2w y2 w

7 w y2 w

8 w

1 w

1 w

I w

5 w

1 w

Description y2 w y2 w y2 w y2 w

'/2 w y2 w y2 w y2 w

Var.

Var.

Var.

Var.

Var.

Tektronix

Part Number

Comp. Sweep Mag. Regis.

Comp.

10%

Mica

Comp.

W W

1%

10%

%%

311-023

302-470

*310-507

302-470

Use *310-614

Comp.

Comp.

W W

Comp.

Comp.

10%

10%

5%

10%

5%

304-153

304-153

308-054

304-223

303-0243-00

Comp.

Comp.

Comp.

Comp.

Comp.

Mica

Comp.

Comp.

Prec.

Comp.

10%

5%

10%

5%

10%

1%

10%

10%

1%

10%

302-562

301-0562-00

302-104

301-0104-00

302-470

*310-524

302-470

304-274

309-014

302-104

Comp.

Comp.

Comp.

Comp.

Comp.

10%

10%

10%

10%

10%

Comp.

Comp.

Comp.

Comp.

Comp.

Position

10%

10%

10%

10%

302-470

302-470

302-221

302-101

304-393

Comp.

10%

Comp. D.C. Balance

Comp.

W W

Mica Plate

10%

5%

1%

Comp.

Comp.

5%

5%

Mica Plate 1%

W W 5%

Comp. Gain Set, Channel A

W W

Comp.

Comp.

Comp.

Comp.

Volts/Div

10%

10%

10%

10%

Use *311-287

302-104

302-184

302-184

302-273

304-393

311-158

302-470

308-106

*310-567

305-822

305-822

*310-567

308-080

311-169

311-111

302-273

302-470

302-470

302-470

8 -7

Electrical Parts List— Type 5 1 6

R472

R473

R477

R478

R485

R486

R487

R488A,B

R489

R490

R530

R533

R534

R537

R538

R539

R540

R540

R541

R542

8-8

R491

R494

R496

R497

R498

R498

R503

R504

R520

R521

R522

R523

R524

R526

R527

Ckt. No.

R455

R456

R457

R458

R460

R462

R463

R468

R468

R470

S/N Range

101-106

107-up

X I40 up

101-2169

2170-up

101-4851

4852-up

670 n

47 0

4.7 k

12k

47 0

100k

3 k

3.3 k

2.2 k

4 7 0

100 k

3 k

27 0

100 0

1 k

1 k

470 0

33 k

750 0

680 0

47 0

600 0

8.2 k

8.2 k

600 0

3.5 k

27 0

47 0

550 0

100 k

100 0

39 k

1 k

100 0

39 k

15k

1 meg

100 k

47 0

47 0

220 0

100 0

39 k

39 k

200 0

Resistors (conf)

'A w

2 w

2 w

2 w

2 w

5 w

'A w

'A w

'A w

'A w

5 w

'A w

'A w

7 w

7 w

'A w

'A w

10 w

'A w

'A w

2 w

'A w

'A w

2 w

5 w

'A w

'A w

'A w

'A w

'A w

'A w

1 k

1 k

Descripition

V j w

V2 w

2 w

2 w

’/ 2 w

'A w

5 w

2 w

1 w

'A w

Prec.

Comp.

Comp.

Comp.

Comp.

Comp.

W W

Comp.

Comp.

Ccmp.

Var.

Mica Plate

Comp.

W W

10%

5%

Comp.

10%

Comp. Gain Adjust

1%

Mica Plate

Comp.

Comp.

W W

Comp.

1%

10%

10%

5%

10%

Var.

Var.

Comp.

Comp.

Comp.

Comp.

Comp.

W W

Prec.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

10%

10%

10%

10%

D.C. Bal

10%

10%

10%

10%

10%

5%

1%

10%

10%

10%

Comp.

Mica Plate

Comp.

Comp.

Mica Plate

10%

1%

5%

5%

1%

W W

Comp.

Comp.

W W

Comp.

5%

10%

5%

Volts/Div.

10%

1%

10%

10%

10%

10%

10%

5%

10%

5%

10%

Tektronix

Part Number

309-082

302-470

306-472

306-123

302-470

302-104

308-062

Use 303-222

303-222

302-470

302-104

308-062

302-270

311-169

*310-523

*310-523

302-471

(2) 302-333

308-016

302-681

302-101

306-393

302-102

302-101

306-393

308-108

309-014

302-104

302-470

302-470

302-221

302-101

304-393

304-393

311-158

302-470

*310-567

305-822

305-822

*310-567

308-080

302-270

301-0470-00

Use *311-287

302-104

R578

R580

R581

R583

R584

R585

R586

R588

R589

R590

R615

R616

R617

R618

R623

R627

R633

R635

R638

R639

R591

R593

R594

R594

R595

R596

R597

R601

R603

R609

R550

R551

R555

R556

R558

R571

R572

R573

R576

R577

Ckt. No.

R543

R544

R546

R547

R548

S/N Range

101-299

300-up

X630-up

180 k

180 k

27k

2 x 50 k

27 k

47 0

47Q

670 a

47 a

12k

47 a

1.2 k

220 k

56 k

1.5 meg

10k

18k

180 k

360 k

120 k

18k

180 k

120 k

360 k io o a

220 k

220 k

10k

8k

1.5 k

27 k io o a

50 a

33 a

33 k

68k

10k

50 k

1 meg

1 k

750 a

470 k

18k

120 k

10k

V i w

'/2 w y2 w y2 w

2 w

V i w

1 w y2w y2w

V i w

V i w

2 w y2w y2w y2w

2 w

V i w

V i w y2w

’/ 2 w y2w

V i w y2 w y2w

25 w y2 w

1 w y2 w y2 w

Vi w y2w

5 w

5 w y2 w y2 w y2 w

1 w y2 w

Resistors

( c o n t j

Descripition y2 w y 2 w

Va w y2 w

Var.

Var.

Var.

Electrical Parts List— Type 5 1 6

302-224

302-224

Use 308-007

308-007

302-152

302-273

302-101

311-057

304-330

302-333

309-042

311-015

309-090

302-105

302-102

308-147

302-474

304-183

302-124

302-103

8 - 9

Tektronix

Part Number

302-184

302-184

302-273

311-111

302-273

302-470

302-470

309-082

302-470

306-123

302-470

304-122

302-224

302-563

302-155

302-103

306-183

301-184

301-364

302-124

306-183

301-184

302-124

301-364

302-101

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

10%

10%

10%

Position

10%

Comp.

Comp.

Prec.

Comp.

Comp.

10%

10%

1%

10%

10%

10%

10%

10%

10%

10%

10%

10%

5%

5%

10%

10%

5%

10%

5%

10%

Comp.

Comp.

W W

W W

Comp.

10%

10%

5%

5%

10%

Comp.

Comp.

10%

10%

W W Scale Ilium.

Comp.

10%

Comp.

10%

Prec.

1%

W W —150 Adjust

Prec.

Comp.

1%

10%

Comp.

10%

W W

Comp.

Comp.

Comp.

Comp.

5%

10%

10%

10%

10%

Electrical Parts List— Type 5 1 6

Ckt. No.

R640

R642

R644

R650

R651

S/N Range

R802

R803

R806

R807

R814

R815

R824

R824

R825

R825

R673

R677

R678

R678

R679

R679

R680

R684

R685

R801

R653

R657

R658

R659

R663

R664

R666

R667

R670

R671

R826

R826

R827

R828

R828

R840

R841

R842

R842

R844

8-10

X4852-up

101-4851

4852-up

101-4851

4852-up

101-709

710-up

101-709

710-up

101-4449

4450-up

101-709

710-up

101-709

710-up

101-4449 i o n i o n i o n

333 k

490 k

1 meg

330 k

47 k

33 k

1 k

1 k

1 k

1.25 k

610 k

300 k

1 meg

560 k

270 k

560 k

47k

56 k

100 k

180 k

47 k

1 k

1 meg

1 meg

33 k

1 meg

1 meg

2.2 meg

2 meg

3.3 meg

3.3 meg

2 meg

390 n

68 k

47k

1.5 k

470 k

4 7 n

6.8 meg

6.8 meg

6.8 meg

6.8 meg

'A w y, w y2 w

'A w

1 w

2 w

Resistors

(c o n t j

Description

2 w

2 w

2 w

'A w y2w

'A w y2w

V i W

Vi w

V i w

%W

10 w

25 w

V i w

V i w

Vi w y 2w

1 w

V i W y2w y2w

'A w

V i w y2 w y2w

1 w

2 w y2 w y 2w y2w y2w

1 w

2 w

1 w

2 w

Var.

Var.

Var.

Var.

Tektronix

Part Number

306-100

306-100

306-100

309-053

309-002

302-105

301-0564-00

Use 304-274

301-0564-00

302-473

301-0563-00

302-104

302-184

302-473

302-102

302-105

302-334

302-473

302-333

302-102

302-102

308-089

308-102

309-006

309-125

304-391

306-683

302-473

302-152

302-474

302-470

304-685

306-685

304-685

306-685

311-041

311-0041-02

302-333

316-105

302-105

302-225

311-042

304-335

306-335

311-043

© j

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

W W

W W

Prec.

Prec.

Comp.

Comp.

Comp.

Prec.

Prec.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Comp.

Intensity

Intensity

10%

10%

10%

Comp.

Comp.

Comp.

Comp.

Comp.

10%

HV Adjust

Focus

10%

10%

10%

10%

10%

10%

10%

10%

10%

10%

10%

10%

10%

5%

5%

1%

1%

10%

5%

10%

5%

10%

5%

10%

10%

10%

10%

10%

10%

10%

1%

1%

10%

10%

10%

10%

10%

R875

R876

R878

R879

R880

R880

R883

R885

R886

R887

R888

R889

R890

R891

R892

R893

R894

R895

R848

R861

R862

R863

R864

R870

R871

R872

R874

R874

Ckt. No.

R844

R845

R846

R846

R847

S/N Range

4450-up

101-709

710-up

101-339

340-up

101-339

340-up

SW10A,B,

SW10A,B

SW10A,B

SW110

SW160

SW160

SW160

SW348

SW348

SW400 m

101-269

270-1958

1959-up

101-3929

3930-4769

4770-up

101-569

570-up

101-569

2 meg

1 meq

10k

10k

27 k

1 meg

100 k

100 k

120 k

100k

68 k l o o n

10 k

6k

2 k

1 k

600 n

200 n lo o a

60 n

20 n i o n i o n

150 k

2.7 meg

1 k

3.3 meg

3.9 meg

68 k

1 k

33 k

10k

100 k

Switches

Trigger Selector

Trigger Selector

Trigger Selector

Preset W/R17, R110 & R349

Time/Division

Time/Division

Time/Division

Horizontal Display

Horizontal Display

Polarity "A " y2 w y2 w y2 w

Vi W y 2 w

V 2 W y2 w

V1 w y2 w y2 w y2 w y2 w y2 w y 2 w y2 w y2 w y2 w y2 w y 2 w y 2 w y2 w y2 w

Resistors fconfj

Descripition

Var.

y2 w

V 4 W y 2 w y2 w y2 w y2 w y2 w

Var.

Var.

Var.

Electrical Parts List— Type 5 1 6

Comp.

Comp.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Comp.

Comp.

Comp.

Comp.

Comp.

Focus

10%

10%

10%

10%

Comp.

10%

Comp. Geom. Adjust

Comp.

Comp.

10%

10%

Comp. Astigmatism

Comp.

Comp.

Comp.

Comp.

Comp.

10%

10%

10%

10%

10%

Comp.

Comp.

10%

10%

Comp.

10%

Comp. Cal. Adjust

Comp.

10%

10%

10%

1%

1%

1%

1%

1%

1%

1%

1%

1%

1%

1%

Tektronix

Part Number

311-0043-02

302-105

316-103

302-103

302-273

302-105

311-026

302-104

302-124

311-026

302-154

302-275

302-102

302-335

302-395

302-683

302-102

302-333

311-076

302-104

302-683

302-101

309-100

309-099

309-098

309-115

309-097

309-073

309-112

309-067

309-064

309-096

309-096

Wired Unwired

*262-333 *260-332

Use *050-107 *260-377

*262-564 *260-377

311-099

*262-334 *260-329

*262-0334-01 260-0329-00

*262-0334-02 260-0329-00

*050-027 *260-186

*262-430 *260-186

*050-046 *260-331

8

-

1

1

V24

V45

V I35

V I45

V I45

V I52

V I52

V I61

V I83

V I93 m

V364

V384

V423

V434

8-12

Ckt. No.

SW400

SW410

SW500

SW500

SW510

SW585

SW601

TK601

SW848

SW870

Electrical Parts List— Type 5 1 6

S/N Range

570-up

101-569

570-up

Switches fcontj

Descripifion

Polarity "A "

Volts/Division "A " turret atten complete

Polarity "B"

Polarity "B"

Volts/Division "B" turret atten complete

Mode

Power W/R601

Thermo Cutout 137°

CRT Cathode Selector

Square Wave Calibrator

D131

D152

D454

D477

D478

D554

D594

D640A,B,C,D

D640A,B,C,D

D642A,B,C-D

D642A,B,C,D

D644A,B,C,D

D644A,B,C,D

T601

T801

X3800-up

X4330-up

101-3799

3800-up

101-3799

3800-up

101-3799

3800-up

Diodes

Germanium, T12G

Silicon, Low Leakage

Germanium, T12G

Germanium, Tek Spec

Germanium, Tek Spec

Germanium, T12G

Silicon Replaceable by 1N4152

1N2862

Silicon, 1N3194

IN 2862

Silicon, 1N3194

1N2862

Silicon, 1N3194

0.25 w

Power (All Voltages)

CRT Supply

Transformers

101-4049

4050-up

101-3799

3800-up

6DJ8

6DJ8

6DJ8

6AN8

EFC-80/6BL8

6AL5 Selected

6AL5

6AN8

12AT7

6DJ8 m

6DJ8

6DJ8

6DJ8

6DJ8

Electron Tubes

40 V

Tektronix

Part Number

*262-432 *260-331

*263-003

Use *050-047 *260-326

*262-433 *260-326

*263-001

*260-325

311-057

260-120

*260-209

*262-332 *260-098

152-008

152-0246-00

152-008

Use *152-0075-00

Use *152-0075-00

152-008

*152-0185-00

Use 152-047

152-0066-00

Use 152-047

152-0066-00

Use 152-047

152-0066-00

*120-142

*120-079

154-187

154-187

154-187

154-078

154-0278-00

Use *157-0104-01

154-0016-00

154-078

154-039

154-187

154-187

154-187

154-187

154-187

154-187

©

V634

V654

V667

V674

V800

V814

V822

V832

V842

V859

V523

V534

V554

V572

V574

V585

V594

V594

V609

V627

Ckt. No.

V454

V463

V464

V474

V493

V87 5

V885

V885

S/N Range

101-4329

4330-up

101-339

340-up

Electron Tubes (cont)

Description

6GM8 (ECC86)

6DJ8

6197

6197

6DJ8

6DJ8

6DJ8

6GM8 (ECC86)

6AL5

6DJ8

12AT7

6DJ8

7119

5651

6AU5

6AN8

6AU6

6080

6AU6

6AQ5

12AU7

5642

5642

5642

T0550-31 CRT Standard Phosphor

6AU6

12AT7

12AU7

Electrical Parts List— Type 5 1 6

Tektronix

Part Number

Use *157-068

154-187

154-146

154-146

154-187

154-187

154-187

Use *157-068

154-016

154-187

154-039

154-187

154-0340-00

154-052

154-021

154-078

154-022

154-056

154-022

154-017

154-041

154-051

154-051

154-051

Use *154-344

154-022

154-039

154-041

Type 5 1 6 T u rret A tte n u a to r

Values fixed unless marked variable.

Capacitors

Tolerance ± 2 0 % unless otherwise indicated.

C407C

C408B

C408C

C408D

C409B

82 pf

5.6 pf

Cer.

Cer.

500 v

500 v

!0%

Adjusting Slug

Adjusting Slug

10%

Adjusting Slug

C409C

C410B

C410C

C410E

C411B

22 pf Cer.

500 v

Adjusting Slug

Adjusting Slug

Adjusting Slug

10%

Adjusting Slug

281-528 use 214-142 use 214-142

281-544 use 214-142 use 214-142 use 214-142 use 214-142

281-511 use 214-142

8-13

Ckt. No.

C411C

C411E

C412A

C412B

C412C

C412E

C413A

C413B

C413C

C413E4

C414A

C414B

C414C

C414E4

C415A

C415E4

C415B

C415C

Electrical Parts List— Type 5 1 6

S/N Range

X3300-up

X3300-up

X3300-up

47 pf

Selected

100 pf

Selected

250 pf

Selected

500 pf

Selected

625 pf

Turret Attenuator (cont)

Capacitors (confj

Description

Cer.

Nominal value 2.2 pf

500 v

Adjusting Slug

10%

Adjusting Slug

Adjusting Slug

Tektronix

Part Number use 214-142

281-519

281-0500-00 use 214-142 use 214-142

Cer.

Mica

Nominal value 2.2 pf

500 v

500 v

10%

Adjusting Slug

Adjusting Slug

10%

Mica

Mica

Nominal value 2.2 pf

Adjusting Slug

Adjusting Slug

10% 500 v

Nominal Value 2.2 pf

500 v 10%

Adjusting Slug

Adjusting Slug

281-530

281-0500-00 use 214-142 use 214-142

283-0539-00

281-0500 00 use 214-142 use 214-142

283-0541-00

281-500

283-0547-00 use 214-142 use 214-142

Resistors

Resistors are fixed, composition. ± 1 0 % unless otherwise indicated.

R407C

R407E

R408C

R408C

R408E

101-5235

5236-up

101-5235

82 0

47 0

500 k

500 k

1 meg

% w

% W

V i

W

Vi w

Vs

W

R408E

R409C

R409C

R409E

R409E

R410C

R410C

R410E

R410E

R411C

5236-up

101-5235

5236-up

101-5235

5236-up

101-5235

5236-up

101-5235

5236-up

101-5235

1 meg

750 k

750 k

333 k

333 k

900 k

900 k

111 k

111 k

950 k

% w

V i

W y 2 w

% W y. w

Vi

W

Vi

W

%

W

Vs w

V i w

R411C

R411E

R411E

M1ZC

R412C

5236-up

101-5235

5236-up

1010135

5236-up

950 k

52.6 k

52.6 k

975 k

Vi w

V b w

V b w

'/! »

V i

W

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Fnc.

Prec.

1%

V 2%

1%

V1%

1%

V1%

1%

V i%

1%

V1%

1%

V1%

1%

Vi %

1%

V2%

11

V1%

H rapacitors arc innolM or f t factory Dr o m an m am if rcp lo m t ir ncccnary, ordtr o trirod turrit tody.

part number

*204-0129-00 [S/N

MO-up).

Below S/N 20^0 order *2^3-0001-00 or *2^3-0003-00 for wired furref body.

316-820

316-470

309-140

322-0610-01

318-004

322-0481-01

309-141

323-0655-00

318-005

321-0628-01

309-142

323-0611-01

318-006

321-1389-01

309-143

323-0612-01

318-007

321-0616-01

3OM0I

323-0757-01

Ckt. No.

R412E

R412E

R413C

R413C

R413E

R413E

R414C

R414C

R414E

R414E

R415C

R415C

R415E

R415E

S/N Range

101-5235

5236-up

101-5235

5236-up

101-5235

5236-up

101-5235

5236-up

101-5235

5236-up

101-5235

5236-up

101-5235

5236-up

25.6 k

25.6 k

990 k

990 k

10.1 k

10.1 k

995 k

995 k

5.03 k

5.03 k

997.5 k

997.5 k

2.51 k

2.51 k

Turret Attenuator (cont)

Resistors (confj

Description

% w

Vs w

Vi w

Vi w

Vs W

Vs w

V 2 w

Vi w

Vi w

Vi w

Vi W

Vi W y .w

Vs w

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Prec.

Electrical Parts List— Type 5 1 6

1%

Vi%

1%

Vi%

1%

Vi %

1%

Vi°/o

1% y*% i%

Vi°/o i% y2%

Tektronix

Part Number

318-008

321-0627-01

309-145

323-0614-01

318-009

321-1289-01

309-146

323-0615-01

318-010

321-0613-01

309-147

323-0616-01

318-011

321-0626-01

8-15

IN P U T A

INPUT ft

TRIGGER

IN P U T

C A L . O U T

T Y P E S I 6 O S C IL L O S C O P E A ,

+ C A T E

O U T C F

V 1 9 3 A

- * - o

+

C A T E

O U T

S A W T O O T H

O U T C F

V I 9 3 &

♦ O

S W E E P G A T IN G

M U L T I V I B R A T O R

V I 3 S V I 4 B A

D I S C O N N E C T

D I O D E S

V 1 E>2

M I L L E R .

R U N U P

C I R C U I T

Vlfcl

H O R I Z O N T A L

DISPLAV

N O R M ,

O t - O -

H 0 R 1 Z 0 N T A L

A M P L I F I E R

V 3 4 3

V 3 A 4 -

V 3 6 4 -

EXT. HORIZ.

INPUT o - 1

H O L D - O F F

C l R C U I T v i e s

A,

10

1 4 ' 4 2

B L O C K D I A G R A M

r ~

3 R

T R I G G E R - I N P U T A M p L I F lE P -

A N D C O M P A R A T O R

“ T ■

3>F r__________ 1 S W I6 M

TRlGjCq ER SELECTOR |' 1 “

I

3F

I MpOpTANT:

A L L C I R C U I T V O L T A G E S W t R t O B T A IN E D W IT H A

R O ,O O O .n ./V V O M . A L L H E A D IN G S A R E I N V O L T S .

V O L T A G E £- W A V E F O P .M A M P L IT U D E M E A S U R E M E N T S

A R E N O T A B S O L U T E . T H E Y M A Y V A R Y B E T W E E N

I N S T R U M E N T S A S W E L L A S W I T H I N T H E I N S T R U M E N T

I T S E L F D U E T O N O R M A L M A N U F A C T U R IN G T O L E R A N C E S

A N D T R A N S IS T O R A N D V A C U U M T U B E C H A R A C T E R IS T IC S .

A C T U A L P H O T O G R A P H S O F W A V E F O R M S A R E S H O W N .

CALIBRATOR ................................................................................. OFF

HORIZ. DISPLAY............................................................................ NORM.

TIME/DIV ....................................................................................... 1 mSEC

VARIABLE (TIME D I V ) ................................................................... CW (CALIBRATED)

TRIGGER SELECTOR (RED K N O B )................................................. AC

TRIGGER SELECTOR (BLACK KNOB) ........................................ +LINE

TRIGGERING LEVEL ...................................................................... CENTERED

.STABILITY....................................................................................... PRESET

2 0 V / D I V

IN T . TP .IG ,. S I Q .

F R O M C A T H . ,

P IN 8 , V 4 9 3 B

(V E R .T . A M P . D IA G ,.)

WAVEFORMS AND VOLTAGE READINGS

WERE OBTAINED WITH CONTROLS SET AS FOLLOWS,

TRIGGERING LEVEL

FOR W AVEFORM S................................................................... CENTERED

FOR UPPER VOLTAGE READINGS........................................... CCW

FOR LOWER VOLTAGE READINGS......................................... CW

SEE ALSO

IMPORTANT

NOTE O N THIS DIAGRAM.

R I 4

IOO /L L , IOO

—v w 4 — — 4 ^ w \ —

-fc.3

( 2 2 8 <

3 9K>

;ii2 9

> 39K

O V

OV

CI 5

.O O l

-A — '\A A ,— A—

RI5

-9 -7 0 K

< -4 U -O A C LF REJEC TS R 1 3

• < I M

■O A U T O 1

"

O H F S Y N C .

-I 50V

n

+

1

P20^

3 . 9 M >

"» R2l<

©20 |C 5

T

1

R-19

—

I M

WV---- »

C2 I

Ol

—

^ o

IN T. T R IG .

D C L E V E L

A D J .

5 in 5 6 C / D I V

T Y P E B I G O S C I L L O S C O P E iswroAi

- | t r ig g e r . s e l e c t o r TI-

2F 2R

I

, J

2R

i

1

P-Ub

O O K

SEE PARTS LIS T FOR E^

VALUES AND S ER IA L N t

RANGES O F PARTS MAR

WITH B LU E O U TLIN E .

C

IER

T R .I G G E P . M U L .T IV 1 B P .A T O R .

1

+

SEE PARTS LIST FOR EARLIER

VALUES AND S ER IA L NUMBER

RANGES OF PARTS MARKED

W IT H BLUE O U TLIN E .

C I R C U I T N U M B E R S

1 T H R U 4 9

T I M E - B A S E T R I G G E R .

«

3

,^ss. e»

&£>4

+ jY P ^ O S C IL L O S C O P E .

F

■IBLANK-JNG

CF

+ 3 0 0 V

1 *

\

D I S C O N N E C T

D I O D E S

U N B L A N K I H C i P U L S E

' T O C R T G ,R .iD

( C R T C I R C U I T . )

\

+

________S A W T O O T H T O R 3 3 0

- 2 . 9 ( H O f c I Z . A M p . D I A G R A M )

6 .F F “ . M A 7 7 0 - U P

SEE PARTS LIST FOR EARLIER

VALUES AND SERIAL NUMBER

RANGES OF PARTS MARKED

WITH BLUE OUTLINE.

WAVEFORMS a n d

VOLTAGE READINGS

WERE OBTAINED WITH CONTROLS SET AS FOLLOWS:

STABILITY

FOR WAVEFORMS............................................................

FOR UPPER VOLTAGE READINGS (SWEEP IS DISABLED) ..

FOR LOWER VOLTAGE READINGS (SWEEP FREERUNS) ..

PRESET

CCW, BUT NOT

SWITCHED TO PRESET cw

SEE ALSO

IMPORTANT

NOTE ON SWEEP TRIGGER DIAGRAM.

T I M E - & A S E G E N E R A T O R

C IR C U IT N U M & fcR S

1 0 0 T H R U > 9 9

r

IF£R

S W I6 0

■I t im e / div , V o o o o o

R IQ O B

4.7M

|^ — H O L D -O F F ----p \

+

TYPE 516 OSC ILLO SC O PE

|UMCALIBR>VfFD| m o u n t e d o h r ig o y

SWITCH IS IW t h i s

P O S ITIO N ONLY WHEN

RICO Y IS IN C A L IB R A T E D

PO S ITIO N (C W RO TA TIO N )

SEE PARTS LIST FOR EARLIER

VALUES AND SERIAL NUMBER

RANGES OF PARTS MARKED

WITH BLUE OUTLINE.

-I50V e>

T ---------------------------------------------------------------------------------------- 1 ----------------------------1 + e> T I M I N G .

I 69

SWITCH

1SW34A1

H O R lZ .

DISPLAY

IP 2P

( 5 ) B34&

T

O -lo < R346

> IOOR

I O O V / D I V

-IS O V

SAWTOOTH

FROM C A TH .,

PIN 3 , V I 6 I B

(T IM E -B A S E \

\G.EN.

DIACL.y ^ 3 0 > l.a 4 M £ r

R 3 3 3 A

2 0 R

R 332

I.5 M

U C 3 3 0

7 p 4 . 5 - 2 6

C340

15

P340

5fcO

1

+ 3 0 0 V

J ^ fe D J S

' °

R 34I

4 7

- T O

+ 9

R 34S

4 7 R

-I5 0 V

C 2 2 4

3 - 1 2

- f t —

NORM. i

------ -o —W-c

R 3 4 7 R 2 2 5

I2 0 R SOR

MAG.. O-----------7 ^—--------

EXT. °

SWP. (LAIN

ADJ.

-I60V

2 F IF 2 F

: 12355

4 0 0 K

;R3S&

2S O R

~

1

-------------►<'1 2 3 5 8

©

5 0 R

-IS O V

+ IOOV

V 3 4 3 B

W&DJ8

MAC

WAVEFORMS AND VOLTAGE READINGS

WERE OBTAINED W ITH CONTROLS SET AS FOLLOWS:

EXT, HORlZ. IN P U T .............................................................................. N O N E

HORlZ. DISPLAY

FOR W A V E F O R M S ......................................................................... NORM .

FOR VOLTAGE R E A D IN G S .......................................................... EXT.

HORIZONTAL POSITION

FOR UPPER VOLTAGE R E A D IN G S .............................................. CCW

FOR LOWER V6LTAG E R E A D IN G S ............................................ CW

SEE ALSO

IMPORTANT

NOTE O N TIME-BASE TRIGGER DIAGRAM.

EXT- H O R lZ .

INPUT

5 m S E C / D I V

E 349 f

IO O R

| H O R lZ .-IN P U T ATTEN

HOOV

R 333B

2 0 R 4 ' R 3 S 0

Cw\f24jC

Rsei

S.6K

T

R 3 8 2 < C 3 S I.

IOOR? .O l '

-ISOV h o r i z o n t a l

POSITION

SEE FARTS LIST FOR EARLIER

VALUES AND SERIAL NUMBER

RANGES O F PARTS MARKED

WITH BLUE OUTLINE.

ty p e 51 G OSCILLOSCOPE

B

C I R C U I T M U M & t p . S

2 . 2 . 5 T H R U 3 8 9

H O R I Z O N T A L A M P L I F I E R

+

TO GRID, PIN 2., V463A

THRU R456

( V E R T IC A L O U T P U T S T A G E )

SEE PARTS LIST FOR EARLIER

VALUES AND SERIAL NUMBER

RANGES OF PARTS MARKED

WITH BLUE OUTLINE.

t o g r id , pin 7 , V46BB

T H R U R 5 5 G

( V E R T I C A L O U T P U T S T A G E )

L 5 5 5

6.8-l4.G^A

VOLTAGE READINGS w e re o b ta in e d

WITH CONTROLS SET AS FOLLOWS:

INPUT SIGNAL........................................................

TRIGGER SELECTOR (RED KNO B)...........................

VERTICAL POSITION ..............................................

SEE ALSO

IMPORTANT

NOTE ON TIME-BASE TRIGGER DIAGRAM.

V E R T I C A L A M P L I F I E R

C 1P -C U JT K J U M B tp .5

4 0 0 THPLU 5 9 9

I NT- TRIG. S1<

TO SWIOA ,

VERT.

FROM

(VERT.

DIAG.)

VERT.

FROM

(VERT.

D IAG .

SEE PARTS LIST FOR EARLIER

VALUES AND SERIAL NUMBER

RANGES OF PARTS MARKED

WITH BLUE OUTLINE.

VOLTAGE READINGS w e re o b ta in e d

WITH CONTROLS SET AS FOLLOWS.

INPUT SIGNAL........................................................

TRIGGER SELECTOR (RED KNO B)...........................

SEE ALSO

IMPORTANT

NOTE ON TIME-BASE TRIGGER DIAGRAM.

T Y P E SIC. OSCILLOSCOPE

r

_ i C 4 8 4 A - t

C 4 S -4 B _ ^ C 4 6 4 C _ t

C 4 S 4 D _ t

C 4 S 4 E

^ 0 0 ; ......" \ 0 6 o r v. OOP ./

1 iQ Q Q j iQ Q Q ;

■97

O

I V4 9 3 B

' '/Z 6 D J S

+

VERTICAL OUTPUT STAGE

C I R C U I T N U M & t R S

• * 5 0 T H R U 4 - 9 9

- r p e DELAY LINE

V 4 9 3

V S 7 4 V G 5 4 V & 7 4 v s a s

+ IO O V

P R IM A R Y £ FAN CONN

FOR 2 3 4 V O p E R A T lO l

I--------------------

T H E R M A L

C U T O U T '

P

C60I.

M l

S W C O l

I p o w e r ]

—

2 3 4 V A C

5 0 - & 0

+ 3 0 0 V

T O P IL O T

G R A T IC U L E

L IG H T S

------ POWER C H A S S IS -------

4

V 4 S

Xs

4 , 5

V l

8 3

9

V Z 4

_A 0_4

V I 3 S

_ 4 f } _ S

V I 4 S

L i T ^

V G |

S

1.4

V I S 2

-----SWEEP CHASSIS

&

V i 4 3

>

4 v a o o

X

3 4

,

v a i4

5

[X

9

V I 9 3

_i/Xs

t

\ T IE P O IN T

X O N C E R A M IC

S T R IP

-------0 13

/ _ ] _

( “

G ROUNDED

AT V 3 C 4

FAN

SW&OI

, 1 P O W E R 1

)

F fc O I

3 . 2 A

RANGED

C O N T R O LS

117 VAC

50

FRO^ n.

T E R M . 13 ^

P

45

HEATER. W IRING DIAGRAM

TYPE 5 1 6 O SC ILLO S C O P E

+

P R IM A R Y & FAN C O N N E C T E D

F O R 2 3 4 V O P E R A T IO N

+

P O W E R S U P P L Y

I C o?

T S O I

R S 2 7

33 K

T Y P E 5 1 6 OSC ILLO SC O PE

SEE FARTS L IS T FOR E ARLIER

VALUES AND S ER IA L NUMBER

RANGES OF PARTS MARKED

W IT H BLU E O U TLIN E .

33 K UNBLANKING PULSE

C I R C U I T N U M & t P - S

6 0 0 T H g .U 8 6 9

C R T C I R C U I T

TP-

<o<oA

i o o v / d i v .

C A L IB R A T O R . M U L T I V I B R A T O R

+ IO O V

+

T Y P E B I G O S C I L L O S C O P E

SE!

VA

RA wr

C A L .

'A D J .

C A L . O U T

C F

+ 3 0 0 V

+

SEE PA R TS L IS T FOR E A R L IE R

V A L U E S A N D S E R IA L N U M B E R

RAN GES O F P A R TS M A R K E D

W IT H B L U E O U T L IN E .

C1R.CUIT NUM&tp-S

QIO THR-U 899

C A L I B R A T O R .

G <bA

2 X 4 X

I X

C 4 0 7 C

82

R 4 0 7 C R 4 0 7 E

8 2 4 7

I O X

+

C 4 IIB ;

20 X

R4t lcl

9 5 0 R< - I

:C 4l ic

C4I2A.

d ig -

p.41 I t *

52.6 R<

- C 4 I I E

" 4 7

4 0 X

R4I2cl

,975K S

~R412E*

*

2 5 .6 R*

1C4I2C

^ 4 . 2 5

,OU

C4I3A.

m s ■

I O O X

R413CI

^990|c< - £ C413C

- R 4i3& ,

»

10. !R-

.C 4 I3 E

• 2 5 0

2 0 0 X 4 0 0 X

C4I4A__

mg t

R4I4CI k 9 9 5 ^

/T c 4I4B

7 '

C 4I4C

R 4I4E’

5.03R<

__C414 5

‘ 5 0 0

C4I5A.

1531'

R4I5CI i ^ 9 9 7 .5 < < A

7 '

C415C

J

"C41BB

R415E<

2.51 R<

. C 4 I5 E

' 6 2 5

SEE PARTS LIST FOR EARLIER

VALUES AND SERIAL NUMBER

RANGES OF PARTS MARKED

WITH BLUE OUTLINE.

C A PA C IT O R S M A R K E D W IT H *

A R E S IL V E R E D M IC A B U T T O N S

ALL VARIABLE CAPACITORS

ARE APPROX. 0 . 3 - 8 pf

TYPE 5 1 6

TUR.R.ET ATTENUATOR.

S 6 5

M ANUAL CHANGE INFORMATION

At Tektronix, we continually strive to keep up with latest electronic developments by adding circuit and component improvements to our instruments as soon as they are devel­ oped and tested.

Sometimes, due to printing and shipping requirements, we can’t get these changes immediately into printed manuals.

Hence, your manual may contain new change information on following pages.

A single change may affect several sections. Sections of the manual are often printed at different times, so some of the information on the change pages may already be in your manual. Since the change information sheets are carried in the manual until ALL changes are permanently entered, some duplication may occur. If no such change pages appear in this section, your manual is correct as printed.

TYPE 516

TEXT CORRECTION

Section 6

Page 6-8

Calibration

Step 22, top of left column

CHANGE: "two cycles" to read "four cycles" in line five.

C3/269

(Rev. #1)

TYPE 516

CHANGE TO:

Cl8l

SWI60

TENT SN U77O

ELECTRICAL PARTS L IS T CORRECTION

281-0311-00

262-033^-02

SCHEMATIC CORRECTION

2 2 pF C e r

T lm e /D lv ls lo n

5 0 0 V

SWIfcO

TI M E=/P 1V.

I

1 p / i r s w i e o

I-------------

•F /U

k

F R O M C A T H .

PINS, V I 6 3 B __ h o l o o f f c f p a r t i a l

T I M I N G - S W I T C H

I

C i s i

M 15.173A 68

TYPE 516

ELECTRICAL PARTS LIST CORRECTION

CHANGE TO:

L460

L470

108-0170-01

108-0170-01

0.5 HH

0.5 HH

S16,063/270

TYPE 516

ELECTRICAL PARTS LIST AND SCHEMATIC CORRECTION

CHANGE TO:

R478 311-0097-00 200 ft, Var

f

M16,675/870