1568-A Wave Analyzer, Manual

1568-A Wave Analyzer, Manual

INSTRUCTION MANUAL

Type 1568-A

Wave Analyzer

1°/o BANDWIDTH

c

GENERAL RADIO

GENERAL RADIO

WEST CONCORD, MASSACHUSETTS 01781

WARRANTY

We warrant that each new instrument manufactured and sold by us is free from defects in material and workmanship, and that, properly used, it will perform in full accordance with applicable specifications for a period of two years after original shipment. Any instrument or component that is found within the two-year period not to meet these standards after examination by our factory, District Office, or authorized repair agency personnel will be repaired or, at our option, replaced without charge, except for tubes or batteries that have given normal service.

Type 1568-A

Wave Analyzer

1°/o BANDWIDTH

c

Copyright 1967 by

GENERAL RADIO COMPANY

West Concord, Massachusetts U.S.A. 01781

Form 1568-01 00-C

Sept, 1968

10-1498

CONDENSED OPERATING INSTRUCTIONS

1.

Set the FUNCTION switch to CK BAT . If the meter indicator falls within the region marked BAT, proceed . If not, refer to paragraph 3 .

1.1 in this manual.

2 . Set the FREQUENCY dial and MULTIPLIER switch to indicate the frequency of the component to be measured (the reading of the FREQUEN -

CY dial is to be multiplied by the MULTIPLIER indication of the same color) .

3 . If a calibrated meter reading in volts is required, set the FUNCTION switch to CAL and adjust the MAX INPUT VOLTS switch and the METER RANGE switch so that the white dots on both dials are straight up (at 12 o'clock) .

Adjust theCAL control so that the meter indicator falls in the area marked CAL

4 . Set the MAX INPUT VOLTS switch (black knurled dial) so that the white arrow points to a voltage just higher than the rms level of the input signal.

5 . Set the METER RANGE switch (gray knob and clear plastic dial) so that the white area lies under the expected level of the input signal component to be measured .

6 . Set the FUNCTION switch to FAST, unless the signal to be analyzed con · tains a large amount of noise . In the latter case, set the FUNCTION switch to

SLOW .

7 . Apply the signal to be analyzed to the INPUT terminal of the Type 1568 via a telephone plug . The analyzer meter wi II indicate the level of the compo nent for which the FREQUENCY controls are set . Fine tune the FREQUENCY as necessary .

8 . If analyzer is connected to a source of ac power, and automatic frequency range changing (MULTIPLIER switch steps clockwise each time FREQUENCY dial sweeps through blank region) is desired, set the MULTIPLIER SWITCHING slide switch to AUTO; otherwise set this switch to MANUAL .

9 . Obtain the filtered component of the input signal from the analyzer OUTPUT jack via a telephone plug, if monitoring or recording of this signal is required ,

10 . If more detailed instructions on the operation of the analyzer are required, refer to Section 3 of this book. In paFticular, refer to paragraph 3 .

8 for instructipns on the operation of the analyzer with the Type 1521 Graphic

Level Recorder .

TABLE OF CONTENTS

Section 1 INTRODUCTION

1.1 Purpos e ---------------------------------

1.2 Description--------------------------

1.3 Controls and Connectors-------------------

1.4 Accessories Supplied - - - - - - - - - - - - - - -

1.5 Accessories Available ____________________ _

1

1

3

3

5

Section 2 INSTALLATION

2 .1 The Flip-Tilt Case -------------------------

2.2 Dimensions -------------------------------

2.3 Mounting the Type 1568 - - - - - - - - - - -

2.4 Power C o n n e c t i o n - - - - - - - - - - - - - -

2.5 Mounting th e Type 1568 with th e Type 1521 ___ __

6

6

6

7

7

S e ction 3 OPERATING PROCEDURE

3.1 Pow e r

3.2 Calibration

3.3 Connection to Input

3.4 Dynamic Range and Internal Noise

3.5 Distortion Measurements

3.6 Analysis of Signals Having Many Strong Components

3.7 Analysis of Random Signals

3.8 Using th e Type 1568 with th e Type 1521

10

11

12

12

9

9

10

10

S e ction 4 APPLICATIONS

4.1 G e n e ral

4.2 Analysis of Simple Periodic Signals

4.3 Analysis of Modulated Signals

4.4 Analysis of Discrete Components at Low

Frequencies

4.5 Analysis of Noise Spectra

4.6 Analysis of Sounds Produced by Machiner y

4.7 Mil-Standard -7 40B (SHIPS)

4.8 Frequency Measurement of a Component

S e ction 5 PRINCIPLES OF OPERATION

5.1 General

5.2 Input

5.3 Filter

5.4 Output

5.5 Calibrator

5.6 Power Supply

Section 6 SERVICE AND MAINTENANCE

6.1 Warranty

6.2 Service

6.3 Access to Compon e nts

6.4 Minimum Performance Specifications

6.5 Calibration Procedure

6.6 Trouble Analysis

19

19

20

21

21

21

23

23

23

23

27

30

17

17

17

18

18

18

18

18

PARTS LIST and SCHEMATICS

32

SPECIFICATIONS

FREQUENCY

Range: 20 Hz to 20 kHz In six half-decade bands.

Dial Calibrotion:Logarithmic.

Accuracy of Frequency Calibration: 1 %.

F i Iter Characteristics: Bandwidth between 3 -dB points on selectivity curve (see plot) is one percent of selected frequency.

0

:>:

-20

~ 40

\

1\

I L"\.

..

.0

~

· •

-

-IZ

/

I

\

j r---

1 \

\

-·~

{

'i~ ( PE~

CENT;Lo

\

·· ~

1!!

..

~-80

~

-100

/

~

/

v

~

.........

......... t---

-120

0.1 0.2 0 .

3 OA 0.:5 Q7

NORMALIZED

LO

FREQUENCY

2.0 3.0 4.0 s .

o

lO

10.0

Attenuation at 20 % above and at 20 % below selected frequency is greater than 50 dB referred to the level at the se leered frequency. Attenuation at twice and at onehalf the selected frequency is at least 75 dB referred to the level at the selected frequency. Ultimate attenuation is greater than 85 dB.

Uniformity of filter peak response with tuning is

± 1 dB from 20 Hz to 6.3 kHz and ±2 dB from 20 Hz to

20kHz.

INPUT

Impedance: 100 kil.

Voltage Range: 100 /-LV to 300 V full scale in 3-10 series steps . Power is supplied at input socket for the Type

156D-P40 Preamplifier, which extends the sensitivity to

10 11V full scale and increases the input impedance to more than 500 Mil.

Distortion: Input-circuit distortion is lower than -80 dB relative to input-signal level.

OUTPUT

Impedance: 6000 il. Any load can be connected.

Voltage: At least one volt open circuit when meter reads full scale.

Crest Foetor Capacity: Greater than 13 dB.

GENERAL

Analyzing Range: 80 dB. Components of an input signal that differ in amplitude by as much as 80 dB can be measured.

Automatic Recording: Automatic range swit .

ching is provided to allow convenient, continuous spectrum plotting when the Type 1521 Graphic Level Recorder is used. Medium-speed motor is recommended.

Amplitude Calibrator: A built-in feedback-type calibration system permits amplitude calibration at any frequency within the analyzer's range _

Power Supply: 100 to 125 or 200 to 250 V, 50 to 60 Hz,

2 W. A recharp;eable nickel-cadmium battery is also supplied. Battery provides about 20 h of operation when fully charged and requires 14 h for charging.

Accessories Supplied: Type CAP-22 Power Cord; Type

1568-2090 Detented Knob and Dial Assembly, used to facilitate measuring the components of an input signal as a percentage or in decibels with an arbitrary voltage reference.

Cabinet: Flip-Tilt. When cabinet is closed, dimensions are

13

X by 13 by 18

X inches (340, 330, 210 mm) over-all, inc! uding cabinet handle.

Net Weight: 21

~ lb (10.0 kg).

GR EXPERIMENTER, September, 1966.

SECTION

1

INTRODUCTION

1.1 PURPOSE.

The Type 1568 Wave Analyzer fills the need for an inexpensive, portable wave analyzer having high harmonic rejection. Unlike many narrow-band spectrum analyzers, the Type 1568 features a bandwidth proportional to the frequency to which it is tuned.

The analyzer is thus especially suited to applications in which the spectrum to be analyzed contains closely spaced discrete components or steep noise slopes at low audio frequencies. Such characteristics are common to the vibration spectra produced by various types of machines.

The combination of the Type 1568 with a Type

1521 Graphic Level Recorder forms an automatic spectrum plotter.

1.2 DESCRIPTION .

.

The Type 1568 is a general-purpose wave analyzer having a constant percentage bandwidth, measured between 3-dB points on the selectivity curve, of

1 % . The Type 1568 has a high attenuation rate - a unique feature among constant-percentage-band analyzers -which results in more than 75 dB attenuation an octave away from the selected frequency.

The analyzer consists of three basic sections: input amplifier, filter, and output amplifier. The input amplifier section includes two calibrated step attenua tors, one of which is adjusted by the MAX INPUT

VOLTS switch. The other forms part of the analyzing attenuator and is adjusted by the METER RANGE switch. This section also includes a continuously adjustable attenuator, the CAL control, which is used to set precisely the over-all gain of the instrument.

The filter section consists of a synchronous cascade of two resonant (second order) filters. The filter is continuously tunable from 20 Hz to 20 kHz in six ranges. Additional sections of the analyzing attenuator are included in the filter section. The output amplifier raises the signal level high enough to operate the meter circuit and supplies an output signal for use with a recorder, headphones, or other devices.

Power for the analyzer is supplied by a 115- or

230-volt line or by an internal, rechargeable nicklecadimum battery.

The Type 1568 is available in a portable version

(catalog number 1568-9701) and in a relay-rack adapted version (1568-9820).

INTRODUCTION

TABLE 1-1

Controls, Connectors, and Indicators of the Type 1568

Ref. No.

1

12

6

7

8

9

11

Lamp

Name

FUNCTION Switch

Charge Indicator

CAL Control

INPUT Jack

INPUT Socket

MAX INPUT VOLTS

Switch

Type

Function

6-position rotary switch

Turns analyzer on and off, selects meter speed (FAST or SLOW), selects auxiliary modes (CAL, CK BAT, CHARGE). FAST and SLOW speeds are those specified by the ASA for sound level meters. CAL mode allows analyzer to be amplitude-selfcalibrated at any given frequency. Battery condition is indicated by meter (9) when switch set to CK BAT.

If

meter indicates outside area marked BAT, connect the instrument to an ac power line and select

CHARGE mode. Sixteen hours are required to charge battery from fully discharged condition.

Glows when battery is being charged. 28-V lamp, Drake

Mfg. Co. No.

121-28-204

Continuous rotary control

2 -connector telephone jack, Switchcraft No. 2}-1503

3-receptacle microphone socket,

Cannon XLR Series

Adjusts gain for calibration. Use before applying input signal to set meter indication in CAL region, with FUNCTION switch (1) set to CAL and white dots on METER

RANGE (10) and MAX INPUT VOLTS (11) switches set up (at 12 o'clock).

For connection of input. Input impedance is

100 kn. Outer terminal connected to chassis ground.

For connection of input signal via Type 1560-P40

Preamplifier or any other source fitted with a

Type XLR connector. Terminals 1 and 3 parallel with telephone jack (7); terminal 2 supplies power for preamplifier (15 V). Accepts Cannon XLRseries connector, ELCO EL -series connectors

(Part No. 00-2216-003), and Amphenol microphone connectors (Part No. 91-853).

Panel meter

Scales: 0 - 3 V,

0 - 10

v,

-15 -

+2

DBM

8-position rotary switch (black, knurled dial)

Indicates amplitude of selected frequency components in accordance with setting of

MAX INPUT VOLTS and METER RANGE controls (10 and 11). Also indicates battery voltage (FUNCTION set to CK BAT) and registers circuit oscillations produced by proper adjustment of CAL control when

FUNCTION switch set to CAL.

Sets degree of attenuation of input signal.

Correct setting prevents distortion due to overload of input circuits. Maximum voltage that should be applied to input circuit is indicated by white arrowhead.

NOTE

This control must not be adjusted during analysis of a signal.

2 TYPE 1568 WAVE ANALYZER.

Ref. No.

10

Name

METER RANGE

Switch

5 FREQUENCY

MULTIPLIER

13 FREQUENCY

Dial

4 MULTIPLIER

SWITCHING

2 OUTPUT Jack

3 POWER Connector

9

TABLE 1-1

(cont)

Type

Function

7-position rotary switch (clear dial with grey knob)

6-position rotary switch (continuous, i.e., no stops)

Continuous rotary control

2-position slide switch

2-connector telephone jack, Switchcraft No. 2} -1503

3 -connector power plug

Selects meter range, which is indicated over white area on MAX INPUT VOLTS dial. Black scale indicates full-scale voltage; red scale indicates power in decibels referred to 1 mV in 600 n (1.6 nW). Red scale can also be used to indicate dB with an arbitrary voltage reference.

Selects frequency range of analyzer. Multiply

FREQUENCY dial (13) reading by indicated number to obtain selected frequency. When

MULTIPLIER SWITCH (4) is set to AUTO

(used during ac-line operation only), this control is advanced one clockwise position by an internal motor each time the FRE-

QUENCY dial is swept through its blank region.

Selects, in conjunction with FREQUENCY

MULTIPLIER, center frequency of !%-bandwidth filter. Read white scale when FREQUENCY

MULTIPLIER points to a white dot; read red scale when it points to a red dot. May be driven automatically from Type 1521 Graphic

Level Recorder when Type 1521-Pl5 Link

Unit with 16-toothed sprocket is used.

Connects (AUTO) or disconnects (MANUAL) motor that drives FREQUENCY MULTIPLIER when analyzer is line operated. Motor is automatically disconnected when analyzer is battery operated.

Supplies filtered signal at a level of at least

1 V open circuit corresponding to full-scale meter indication. Output impedance is 6 kn.

For application of 115-V or 230-V ac power to charge battery or to operate the instrument.

Ac power must be supplied when automatic multiplier switching is to be used. Battery and analyzer circuits are in parallel, so analyzer will not operate properly from line if battery is fully discharged. Removal of the external power source does not turn off the instrument.

Figure 1·1. Controls and connectors of the Type 1568 Wave Analyzer.

1.3 CONTROLS AND CONNECTORS.

The controls, indicators, and connectors of the

Type 1568 are indicated in Figure 1-1 and listed in

Table 1-1.

1.4 ACCESSORIES SUPPLIED.

The accessories supplied with the Type 1568

Wave Analyzer are listed in Table 1-2 and shown in

Figure 1-2.

INTRODUCTION 3

Figure l·i

Ref.

No.

1

2

3

4

5

TABLE 1-2

Accessories Supplied with the Type 1568 Wave Analyzer

Item

Description Part Number

Type CAP-22 3 -Wire Power Cord

Type 1560-P95 Cable Assembly

Handbook of Noise Measurement

Nut

Type 1568-2090 Knob and Dial

Assembly

7 -foot, 3 -connector plug to 3 -connector socket

3 -foot shielded cable, phone plug to double plug. (Connects the Type 1568 with a Type 1521 Graphic Level

Recorder or other device.

4200-9622

1560-9695

Replaces CAL knob to convert to a . screwdriver control in case this feature is desired.

Replaces METER RANGE knob for applications in which an arbitrary level reference is desired. Has two scales: 0.1% to 100% and 0 to -60 dB.

The dial of this assembly can be turned with respect to the knob.

5301-8100

5840-0200

1568-2090

TO BE REMOVED FOR

INSTALLATION OF

LINK UNIT

4 TYPE 1568 WAVE ANALYZER

4

-

/~

Figure 1-2. The Type 1568 Wove Analyzer. Below ore shown the accessories in eluded with the instrument.

TABLE 1-3

Other Accessories Available for the Type 1568 and/or Type 1521

Item

Purpose Part Number

Type 1521-P15 Link Unit

Type 1521-6082 16-Tooth Gear

Type 1521-P10B Drive Unit

Type 1521-9475 Chart Paper

Type 1521 Graphic Level

Recorder

For attachment to FREQUENCY control of the Type 1568 for chain drive with the

Type 1521.

Used with Link Unit to provide correct scale factor for Type 1568.

Provides coupling to Link Unit on the

Type 1568. Combination of Link Unit,

16-Tooth Gear, and Drive Unit synchronizes Type 1568 FREQUENCY to special recording paper listed below.

Calibrated 2 Hz to 20Hz (nonnalized), logarithmic, 10 inches per frequency decade.

To record the output of the analyzer and automatically plot spectra.

1521-9615

1521-6082

1521-9647

1521-9475

1521-9802

(60-Hz, bench)

1521-9812

(60-Hz, rack)

1521-9506

(50 -Hz, bench)

1521-9507

(50-Hz, rack)

Type 1560-P52 } . .

Type 1560-P53 V.ibratwn

Type 1560-P54 Pickup

Type 0481-9756 Rack Adaptor

Set

Used, with the Type 1560-P40 Preamplifier, to measure acceleration spectra.

For rack-mounting the portable model of the Type 1568.

1560-9652

1560-9653

1560-9654

0481-9756

1.5 ACCESSORIES AVAILABLE.

1.5.1 THE TYPE 1560-P40 PREAMPLIFIER.

The Type 1560-P40, shown in Figure 1-3, is a high-input-impedance, low-noise preamplifier particularly suited for amplifying the outputs of piezoelectric transducers and for driving long connecting cables without loss of signal voltage. A switch on the preamplifier selects a voltage gain of either 1:1 or 10:1.

Complete specifications are given in the Appendix.

The preamplifier is housed in a small cylindrical case. The Type 1560-P5 Microphone cartridge

Figure 1-3. The Type 1560-P40 Preamplifier. Below are shown accessories avai I able for the preamp! ifier (left to right): The

Type 1560-P5, the Type 1560-P96, and the Type 1560-P98.

plugs directly on to the input end of the case. Adaptors are available for connecting the preamplifier to the cartridge of the Type 1560-P3 Microphone, to GR874

Coaxial Connectors (Type 1560 -P98), and to 3 -terminal microphone connectors (Type 1560-P96). Output from the preamplifier is through a 3 -terminal shielded connector. The required de supply can be obtained directly from the Type 1568 Analyzer.

The preamplifier and accessories are available in various combinations (refer to the Appendix).

The Type 1560-P40H Preamplifier and Power

Supply Set is self-powered and independent of any external supply.

The Type 1560 -P40J* Preamplifier and Adaptor

Set, dependent for its power on the instrument to which it is connected, can be used with the Type 1568

Analyzer.

The Type 1560-P40K Preamplifier and Microphone Set can be used with the Type 1568 Analyzer when an acoustical measurement is needed at low levels and the microphone must be mounted at the end of a long cable.

1.5.2 OTHER AVAILABLE ACCESSORIES.

Table 1-3 lists other accessories available for the Type 1568 Wave Analyzer.

*General Radio Experimenter,

Vol 39, No. 6, June 1965.

INTRODUCTION 5

SECTION

2

INSTALLATION

2.1 THE FLIP-TILT CASE.

Directions for opening the Type 1568 Wave

Analyzer are given on the handle of the Flip-Tilt case.

Once open, the instrument can be tilted to any convenient angle, as shown in

Figure 1-1. The instrument should be placed to give the most convenient access to the knobs and the best view of both the panel control settings and the meter indication.

The case can be locked fully open by means of the same slide pins that are used to lock it when it is closed. It can be carried in the open position, with the cover firmly in place.

DIMENSIONS ARE IN INCHES r

17.""::::=====

13

={-=APPRox

_(@

2.3 MOUNTING THE TYPE 1568.

The Type 1568 Wave Analyzer is supplied in two models: portable and rack-converted. The portable model may be converted to the rack model by means of an adaptor set, catalog number 0481-9756.

To rack mount the Type 1568 Wave Analyzer using this adaptor set, proceed as follows (see Figure 2-3): a. Remove and retain the four 10-32 screws (A) holding the instrument to the case. Lift the instrument out of the case.

1568-23

Figure 2-1. Dimensions of the Type 1568 portable model.

2.2 DIMENSIONS.

The dimensions of the Type 1568 are illustrated in Figure 2-1 (portable model) and Figure 2-2 (rack model).

19

I

124 r

!g

0

Q @

L

0

DIMENSIONS ARE IN INCHES

Figure 2-2. Dimensions of the Type 1568 rack-converted model.

6 TYPE 1568 WAVE ANALYZER

(@"""~

"'I

b. Remove the two 1/4-28, 318-in screws from the pivot stud (B) which holds the cabinet to the handle and cover assembly. Remove the ca)Jinet and replace those screws with the two 114-28, 314-in screws (C) included in the adaptor set. Add a lockwasher and nut to each and tighten. Add a flat washer to each screw. c. Attach brackets (D) and plates (E) to the rack adapter panel as shown. Tighten the nuts on the bracket studs securely, but leave the others only hand tight. d. Place the empty cabinet in the panel and attach it to the brackets securely with the lock washers, flat washers, and nuts provided. Slide the plates over so they rest firmly against the sides of the cabinet and tighten them down. e. Flip the panel and cabinet over and place the instrument in the cabinet. Replace the four screws

(A) removed in step a. f. The instrument can now be mounted in a standard 19-in relay rack with four 10-32, 1j2-in screws with black nylon cupwashers.

2.4 POWER CONNECTION.

The Type 1568 has an internal battery and can therefore be operated remote from any external power source, When an ac power source is available, however, the analyzer should be operated from it. The power consumption of the Type 1568 is 2 W for normal operation and 3.5 W for battery charging. A threeterminal source of either 100 to 125 V, 50 to 60 Hz, for which the instrument is normally supplied, or a source of 195 to 250 V, 50 to 60Hz, can be connected to the Type 1568 via the power cord supplied, The third wire of this cord grounds the chassis of the instrument.

To convert a 100- to 125-V instrument for 195to 250-V operation, remove the instrument from its case (per directions in paragraph 6.3), disconnect terminals 1 and 2 and terminals 3 and 4 on the power supply etched board (Figure 6 -9), and connect terminal 2 to terminal 3. Then, solder a short wire across terminals AT508andAT517 (also on the power-supply etched board). When this conversion is made, a new power -input plate should replace the old one (order from General Radio by part number 5590 -0500 for

100- to 125-V, 5590-1669for 195-to250-V operation).

For information concerning battery operation, charging, discharging, etc, refer to paragraph 3.1.

2.5 MOUNTING THE TYPE 1568 WITH THE TYPE 1521.

Figure 2-4 shows the portable Type 1568 Wave

Analyzer in its Flip-Tilt case mounted above the Type

1521 Graphic Level Recorder. The relay-rackadapted analyzer (Type 1568 -9820) can also be mounted with the recorder. To couple the two instruments, proceed as follows: a, Remove the FREQUENCY control knob-andplate assembly that is fastened to the dial cover with a screw on each side of the knob,

...

FLAT WASHER

±

:<"

-28 SCREWS

PLATE ( E ) +

FLAT

/WASHER

/

FLAT WASHER

LOCK WASHER

/ /NUT

~

Figure

2-3.

Rack mounting the Type 1568 portable model.

INSTALLATION 7

Figure 2·4. The Type 1568 with the

Type 1521 Graphic Level Recorder. b. Place the Type 1521-P 15 Link Unit (1 in

Figure 2 -4) over the FREQUENCY dial cover, orienting the Link Unit as shown in Figure 2-4. c. Loosen the locking screw (2) and rotate the black sprocket plate so that the access hole (3) is over one set of elongated holes in the gray-crackle Link-

Unit plate. Place one of the screws removed in step a in the inner elongated hole and tighten to fasten the

Link-Unit plate to the FREQUENCY dial cover. d. Rotate the black sprocket plate to obtain access to the other set of elongated holes. Insert the other screw into the inner hole and tighten.

The Link Unit should be adjusted so that there is a slight amount of backlash when the knob in the

Link Unit is turned. To make this adjustment, loosen the screws in the gray-crackle plate, slide the plate up or down as necessary, then retighten the screws. e. Replace the 24-tooth gear (supplied) with the

16 -tooth gear : with a 3/3 2 -in Allen wrench, loosen the setscrews holding the gray knob to the Link Unit, remove the knob and the 22 -tooth gear, place the 16-

Tooth Gear on the shaft, and replace the knob. f. Install the chain (4) as shown in the figure.

Two chains are supplied with the Link Unit. Use the short .

chain with the analyzer in its Flip-Tilt case; the long chain must be used with the relay -rack model.

To tighten the chain, loosen the locking screw (2), rotate the black sprocket plate to take up most of the slack, and retighten the screw.

NOTE

This assembly is available as a rocked system (Type 1913

Recording Wave Analyzer, 1% Bandwidth) with a common power control and accessory drawer .

8 TYPE

1568

WAVE ANALYZER

SECTION

3

OPERATING

PROCEDUR

,

E

3.1 POWER.

3.1.1 CHARGING THE BATTERY.

An internal nickel-cadimum battery, which floats across the output of the line -filtering circuit, supplies power to the Type 1568 when the ac line is disc onnected, providing about 20 hours of operation. To see whether this battery needs charging, set the FUNCTION switch to CK BAT: if the meter indicator falls outside the BAT region, the BATTERY needs charging. To recharge the battery, connect the analyzer to an ac power source as described in paragraph 2.4, and set the FUNCTION switch to CHARGE. The CHARGE lamp on the panel should light. The meter will indicate the relative battery voltage, as it does with the

FUNCTION switch set to CK BAT.

About 16 hours will be required to recharge a battery whose voltage reads just outside the lower edge of the BAT region, that is, one which is fully discharged. If the battery has not been fully discharged, it should not be charged the full 16 hour ' s, Charging for a period about equal to the discharge time is best.

Do not overcharge the battery repeatedly or leave the battery on CHARGE continuously, as these practices will adversely affect the life of the battery.

3.1.2 LINE OPERATION.

When the analyzer is connected to an external ac line and the FUNCTION switch is set to FAST or

SLOW, the instrument is operating on power from the line. The Type 1568 should normally be operated from the power line when it is available. The FUNC-

TION switch must be used to turn off the instrument.

NOTE

If the ac power is disconnected and the FUNC-

TION switch left in a position other than OFF, the analyzer will continue to operate on its internal battery. If the battery is more than fully discharged, it may have to be charged for an hour or more before even normal acline operation can be resumed.

3.2 CALIBRATION.

If if is desired that the meter of the Type 1568 read directly in volts, use the instrument's internal gain reference for calibration, To do this: a. Select the frequency at which calibration is desired with the FREQUENCY MULTIPLIER and

FREQUENCY dial. It is best to make the calibration at the center of the frequency range over which operation is intended. b. Set the white dots on the METER RANGE switch and the MAX INPUT VOLTS switches straight up (at 12 o'clock). c. Thrn the FUNCTION switch to CAL. d. Adjust the CAL control for a meter indication in the area marked CAL. It is not necessary to center the indicator in this area exactly.

OPERATING PROCEDURE

9

SECTION

3

OPERATING

PROCEDUR

,

E

3.1 POWER.

3.1.1 CHARGING THE BATTERY.

An internal nickel-cadimum battery, which floats across the output of the line -filtering circuit, supplies power to the Type 1568 when the ac line is disc onnected, providing about 20 hours of operation. To see whether this battery needs charging, set the FUNCTION switch to CK BAT: if the meter indicator falls outside the BAT region, the BATTERY needs charging. To recharge the battery, connect the analyzer to an ac power source as described in paragraph 2.4, and set the FUNCTION switch to CHARGE. The CHARGE lamp on the panel should light. The meter will indicate the relative battery voltage, as it does with the

FUNCTION switch set to CK BAT.

About 16 hours will be required to recharge a battery whose voltage reads just outside the lower edge of the BAT region, that is, one which is fully discharged. If the battery has not been fully discharged, it should not be charged the full 16 hour ' s, Charging for a period about equal to the discharge time is best.

Do not overcharge the battery repeatedly or leave the battery on CHARGE continuously, as these practices will adversely affect the life of the battery.

3.1.2 LINE OPERATION.

When the analyzer is connected to an external ac line and the FUNCTION switch is set to FAST or

SLOW, the instrument is operating on power from the line. The Type 1568 should normally be operated from the power line when it is available. The FUNC-

TION switch must be used to turn off the instrument.

NOTE

If the ac power is disconnected and the FUNC-

TION switch left in a position other than OFF, the analyzer will continue to operate on its internal battery. If the battery is more than fully discharged, it may have to be charged for an hour or more before even normal acline operation can be resumed.

3.2 CALIBRATION.

If if is desired that the meter of the Type 1568 read directly in volts, use the instrument's internal gain reference for calibration, To do this: a. Select the frequency at which calibration is desired with the FREQUENCY MULTIPLIER and

FREQUENCY dial. It is best to make the calibration at the center of the frequency range over which operation is intended. b. Set the white dots on the METER RANGE switch and the MAX INPUT VOLTS switches straight up (at 12 o'clock). c. Thrn the FUNCTION switch to CAL. d. Adjust the CAL control for a meter indication in the area marked CAL. It is not necessary to center the indicator in this area exactly.

OPERATING PROCEDURE

9

For greatest accuracy, calibrate the instrument at each frequency at which it is used. This procedure, however, is not generally necessary.

NOTE

The calibration system in the Type 1568 is such that, with the FUNCTION switch set at

CAL, thegainvariationindicatedby the meter is 10 times the actual gain variation. Therefore, if the analyzer is tuned while in the CAL mode, and the meter indicates, say, a gain variation of 10 dB, the real gain variation is only 1 dB.

3.3 CONNECTION TO INPUT.

3.3.1 GENERAL.

For the sake of convenience, two inrut connectors wired in parallel are supplied on the front panel: an open -circuit telephone jack and a three -terminal

Cannon type XLR audio connector. Input impedance is 100 kn. The analyzer input is ac coupled, and its coupling capacitor will withstand up to 300 V de. A series resistance protects the input circuit from short periods of signal overload. Long periods of signal input greater than 100 V, however, may damage the input circuits when the MAX INPUT VOLTS switch is set to 0.1 V.

Since the gain of the analyzer is high, input leads and plugs should be shielded, particularly if the input signal level is low or the impedance of the signal source is high.

3.3.2 THE TYPE 1560-P40 PREAMPLIFIER.

Terminal #2 of the three-terminal audio INPUT connector is wired to supply power for the Type

1560-P40. Use of this preamplifier is recommended when higher input impedance or higher sensitivity than that of the Type 1568 alone is required. It also allows operation of the wave analyzer remote from the signal source.

The harmonic distortion produced by the preamplifier is extremely low, although when the preamp is used near its maximum signal level, its distortion can be detected by the Type 1568. Since the preamplifier is usually necessary only at low signal levels

(less than 0.1 V), its distortion is normally not a problem.

3.4 DYNAMIC RANGE AND INTERNAL NOISE.

The Type 1568 has the wide dynamic range necessary for a wide analyzing range in automatic recording of frequency spectra. The dynamic range of an analyzer is the range between overload and noise level at any one setting of the attenuator controls.

Curves showing typical noise levels measured at the

OUTI'UT of the analyzer for each setting of the attenuator controls are shown in Figure 3-1. These curves are :•seful in determining analyzing range when the analyzer is used with a recorder. Levels are given in dB referred to the output voltage corresponding to a full scale meter deflection. Full scale meter deflection occurs at a level 10 dB below overload, so 10 dB must be added to the curves to find actual dynamic range.

3.5 DISTORTION MEASUREMENTS.

3.5.1 GENERAL.

Harmonic- or intermodulation -distortion products are usually measuredas a percentage of the fundamental signal level. Alternatively, distortion can w 50

_J

<1: u

<J)

_J

_J

:;)

LL.

3::

0

_J w al

60

70

30

40

80

9020

50

--

-

:.---,-

.....--

-

1-iVR~

r--:-c

I

300-fL~G-=---

r-

---

~

---

-

.----

I-"""'

-

-

-~

~

---

---

-

----

-

.---

10-mV

I

100 200 500 1000 2000

FREQUENCY IN HERTZ

5000 10,000 20,000

11.568-91

Figure

J.l.

Noise level vs frequency at OUTPUT jock for various analyzer attenuator settings.

10 TYPE 1568 WAVE ANALYZER

be measured in decibels referred to the level of the fundamental, or it can be determined by measuring the absolute voltage of each frequency component. An accessory, the Type 1568-2090 De tented Knob and Dial

Assembly, is supplied to facilitate relative percent or dB measurements.

3.5.2 USING THE DETENTED KNOB AND DIAL

ASSEMBLY.

Set up. a. Remove the METER RANGE grey knob and clear plastic dial assembly after loosening the two set screws that secure it to its shaft. b. Secure the Detented Knob and Dial Assembly to the shaft by tightening the one loose set screw on the assembly with a 3/32-in Allen wrench. The other set screw, which is already tight, holds the knob to the dial and should not be loosened. Phase the assembly so that any number, e.g., 100%,appears over the white area on the MAX INPUT VOLTS dial.

Measurement. a. Set the METER RANGE switch (which now has a new knob and dial) fully clockwise. Set the MAX

INPUT VOLTS switch fully counterclockwise. b. Connect the signal to be analyzed to either

INPUT connector, and set the FUNCTION switch to

FAST. c. Tune the analyzer to the frequency of the fundamental or reference component using the FRE-

QUENCY MULTIPLIER and FREQUENCY controls. d. Adjust the MAX INPUT VOLTS switch (black knurled dial) and CAL control for a meter indication of 10.

It will probably be necessary to tune the FRE-

QUENCY control more precisely once an on -scale meter indication has been obtained, If the level of the reference signal is less than 0.1 volt, it will be necessary to use the METER RANGE switch to obtain the full-scale meter indication. If this is the case, leave the MAX INPUT VOLTS switch in the fully clockwise position. e. Hold the grey METER RANGE knob to prevent it from turning, and adjust the clear plastic dial so that 100% is over the white area, f. Select the various distortion frequencies using the FREQUENCY MULTIPLIER and FREQUENCY dial and adjust only the METER RANGE switch for meter indications, fine-tuning the FREQUENCY control as required to obtain peak levels. The full-scale meter range in percent will be indicated on the METER

RANGE dial by the white area of the MAX INPUT

VOLTS dial.

CAUTION

Improper use of the MAX INPUT VOLTS and METER RANGE switches can over· load the analyzer preamplifier and intro· duce errors. The over-all input signal level should never exceed the level set by the MAX INPUT VOLTS switch (the block toothed dial). Once this switch is set to indicate a full-scale reading at the fundamental, never use the MAX INPUT VOLTS switch to increase gain; use only the

METER RANGE switch (the grey knob and clear plastic dial) for this purpose. The procedure out I ined above ensures that the analyzer is not overloaded, and it allows the entire potential analyzing range of the instrument to be realized.

NOTE

At low frequencies (below 100 Hz) the band-· width of the Type 1568 is extremely narrow, and, as a result, the transient response at these frequencies is very slow. Tuning in this range must therefore be done slowly and with great care if the true level of a frequency component is to be found.

3.6 ANALYSIS OF SIGNALS HAVING MANY STRONG COM-

PONENTS.

3.6.1 GENERAL.

When the signal to be analyzed has many strong components, the use of a level recorder is recommended. Manual analysis can be tedious and time consuming and subject to operator error. The following measurement procedure applies to both manual and automatic analysis. For specific recorder-analysis operating instructions refer to paragraph 3 .8. If the actual voltage of each frequency component is required, calibrate the analyzer according to paragraph

3.2. If only relative voltage levels are of interest, use the Detented Knob and Dial Assembly according to paragraph 3.5.2.

3.6.2 SETTING THE MAX INPUT VOLTS SWITCH.

The first step in the analysis is to set the MAX

INPUT VOLTS switch. The proper setting of this switch is central to an accurate analysis, since, if the analyzer circuits are overloaded because of improper setting, components may be produced that were not originally present in the input signal. The analyzer circuits can tolerate a peak amplitude slightly more than 13 dB above the level indicated by the MAX INPUT

VOLTS switch. Adjust the MAX INPUT VOLTS (the black knurled dial) switch as follows:

Signal Level Known. If the input signal does not have a crest factor (crest factor

= peak voltage level) in rms voltage level excess of 10 dB, set the MAX INPUT VOLTS switch to the rms level of the signal. If the crest factor is greater than 10 dB, set the switch to a value that just exceeds half the peak signal voltage. (For small signals, the MAX INPUT VOLTS switch will be set to 0.1

V, that is, fully clockwise.)

Signal Level Unknown. If the rms level is not known, set the MAX INPUT VOLTS switch to a voltage one step higher than the estimated level.

If little is known about the character of the input signal, it should be observed with an oscilloscope to find the peak voltage levels.

OPERATING PROCEDURE 11

CAUTION

Do not apply a signal whose rms voltage level exceeds 300 V to either analyzer INPUT jack.

3,6,3 DETERMINING FREQUENCY COMPONENT

LEVELS.

If they are known, select the various frequencies of the input signal, using the FREQUENCY and FRE-

QUENCY MULTIPLIER controls. Adjust only the

METER RANGE switch(the grey knob and clear plastic dial) for an on -scale meter reading, then fine -tune the FREQUENCY control for a peak reading. The meter indicates the rms voltage of the selected frequency component.

When the frequencies of the components are not known, search through the entire frequency range using both FREQUENCY controls and the METER

RANGE switch.

3.6.4 HARMONICALLY RELATED COMPONENTS.

The bandwidth of the Type 1568 is always 1 % of the selected frequency; therefore, it can not distinguish individual harmonics beyond the one hundredth. (The separation between harmonic number 100 and number

101 is about 1 % of either frequency.) Actually, since the analyzer filter does not have an infinitely high attenuation rate near its band edges and since adjacent harmonics may differ significantly in level, the analyzer will usually separate about 50 harmonics. The analyzer is useful, none -the -less, in measuring harmonic components above the fiftieth when its lim itations are understood.

It might be expected that the levels of components within the pass band of the filter would add in rms fashion. That is, a level L indicated by the meter would be composed of levels L1, L2, etc such that

L =

This would be the case if the meter detected the rms level of the signal. The actual meter circuit, however, employs an average detector which tends to indicate not the RMS sum of the components in the band, but rather the RMS value of a single component. Measuring the level of a harmonic even when other harmonies are included in the pass band, is thus simply a matter of tuning to that particular frequency and reading the meter.

The indication of the Type 1521 Graphic Level

Recorder is more nearly the rms sum of the passed components. Details of interpreting this indication are discussed in paragraph 3.8.6.

3.6.5 MONITORING THE TYPE 1568.

Some types of input signal - short pulses, for example -will overload the analyzer output amplifier when a group of higher harmonics are tuned, even though the meter reads well below full scale. An oscilloscope connected to the OUTPUT jack of the analyzer can easily indicate the presence of such a condition.

3.7 ANALYSIS OF RANDOM SIGNALS.

3.7.1 GENERAL.

Many practical signals contain a certain amount of noise in addition to discrete frequency components.

Indeed, some signals are composed of nothing but noise. Automatic analysis of this type of signal using a Type 1521 with the Type 1568 is essential if an extended range of frequencies is of interest,

3.7.2 PROCEDURE. a. Calibrate the analyzer according to the directions in paragraph 3.2. b. Use an average-responding or an rms voltmeter to determine the approximate over -all level of the input signal. Set the MAX INPUT VOLTS switch to a level just higher than the measured signal level, except when it is suspected that the signal has a high crest factor. In this case, use an oscilloscope to observe the signal, and follow the instructions of paragraph3.6.2 to set the MAX INPUT VOLTS switch. c. Connect the signal to the INPUT of the analyzer and adjust only the METER RANGE switch (the grey knob and clear plastic dial) to obtain an on -scale meter indication. d. Set the FUNCTION switch to SLOW to minimize variations in the meter indication. This is especially necessary at low frequencies where the analyzer's narrow bandwidth produces fluctuations requiring long meter-averaging time. Below 200 Hz take several readings at intervals of at least 5 seconds and average these to find an accurate time average of the noise. e. When the level of a band of noise has been measured, correct the reading of the analyzer's average -responding meter to obtain the rms noise level by adding 1 dB (about 12 % ) to the reading.

3.7.3 SPECTRUM LEVEL.

The spectrum level of a noise signal is the level that would be measured at any frequency by a filter having an effective bandwidth for noise of 1 Hz. A noise spectrum is often specified in terms of its spectrum level so that data taken by different types of analyzers can be readily compared.

The effective bandwidth for noise of the filter in the Type 1568 Wave Analyzer is 1.3

% . Because the bandwidth of the analyzer varies directly with frequency, the correction to spectrum level is also proportional to frequency. The curve of Figure 3 -2 shows the number of decibels that must be added to or subtracted from the measured rms level to find the spectrum level. This conversion to a 1-Hz bandwidth is meaningful only if the spectrum is essentially uniform within the measured band and if the noise does not contain prominent pure-tone components.

3.8 USING THE TYPE 1568 WITH THE TYPE 1521.

3.8.1 GENERAL.

Instructions for the interconnection of the Type

1568 with the Type 1521 are in paragraph 2.4. These

12 TYPE 1568 WAVE ANALYZER

instructions assume a general familiarity on the part of the user with the operation of the analyzer and the recorder as individual instruments.

3.8.2 CHOICE OF ACCESSORIES.

Motor. The Type 1521 should be ordered with a Type

1521-P23 Medium Speed Motor for 60-Hz power-line operation installed (or a Type 1521-P24 for 50-Hz power line). The recorder-speed range possible with the medium speed motor is ideal for use with the analyzer. The high -speed motor normally supplied with the recorder does not permit it to run slowly enough to be used with the lowest two ranges on the analyzer.

Chart paper. Type 1521-9475 Chart Paper should be ordered with the recorder. This paper has a frequency scale length of 10 inches/decade. The full amplitude scale is 4 inches for 20, 40, or 80 dB, depending on the recorder -potentiometer used.

Potentiometer. The Type 1521-P2 40

-dB

Potentiometer is best for most analyzer -recorder operation. When more than 40 dB of the spectrum is of interest, use the 80-c!B Potentiometer (Type 1521-P3).

3.8.3 CALIDRATION OF THE COMBINATION.

If the Type 1521-P2 40 -dB Potentiometer is used, it will probably be convenient to adjust the gain of the recorder so that it gives a full scale indication when the analyzer meter reads full scale, This is done as follows: a. Set the recorder DAMPING control so that recorder overshoot is about one chart division, referring to the instructions in paragraph 3 .2 of the

Type 1521 instruction manual. This setting is not critical for recorder-analyzer applications. b. Set the analyzer FUNCTION switch to CAL, and adjust the MAX INPUT VOLTS switch and the

METER RANGE switch so that the white dots on these controls are both at 12 o'clock. c. Set the analyzer frequency to 1 kHz (the recorder must be in NEUTRAL) and adjust the analyzer CAL control for a meter indication of 10. d. Adjust the recorder A TTENUA TOR and CAL control for a full-scale pen setting (recorder A TTE N-

UA TOR setting will be 10 or 20 dB). e. Readjust the analyzer CAL control for a meter indication in the CAL area. f. When the 80 -dB potentiometer is used, set the pen to indicate 20 db below full scale when the analyzer reads full scale.

NOTE

The analyzer cannot drive the recorder full scale when the 80 -dB potentiometer is used: the analyzer will overload about 10 dB below full scale on the recorder (corresponding to

10 dB above full scale on the analyzer) when the OUTPUT signal is sinusoidal.

3.8.4 CHOICE OF SWEEP SPEED AND WRITING

SPEED.

The narrow filter in the Type 1568 cannot respond instantaneously to a signal, nor can the recorder pen, which is in effect a narrow filter also. These two factors determine the choice of sweep speed and writing speed for the recorder-analyzer combination.

NOTE

When the controls of the Type 1521 and of the

Type 1568 are set as described in paragraph

3.8.5, the chart paper and the FREQUENCY dial are synchronized. Since the chart paper is calibrated with 10 in per frequency decade, the rate at which the analyzer frequency is swept will always be related to the chart speed as follows:

Sweep Rate (decade/min)

=

0.1 x Chart

Drive Speed (IN/MIN). Since the analyzer sweep speed is the factor that is limited, while the chart-drive speed is the factor that is actually set by the controls on the Type

1521, the convention of discussing sweep speed in in/min will be adopted in this section.

~

10

0::

0 w

0::

-Vl-o

~ w

0~

1-

0

~

10

20

............. f.-"""~'"""

--

40

---

-

100

.... f.-"

1-~

---

v

f.-"

-

....

~

200 400 IK

FREQUENCY IN HERTZ

2K

4K

Figure 3·2. Correction vs frequency for rms noise spectrum measured by the

Type 1568 to give the spectrum level of a signal.

....

.... .... r-

~ lOt<

20K

~ -

OPERATING PROCEDURE

13

TABLE 3-1

Maximum Sweep Speed and Maximum

Writing Speed for each Frequency Range

FREQUENCY RANGE

(hertz)

MAXIMUM SWEEP SPEED

(use medium-speed motor)

(inches / minute)

MAXIMUM WRITING SPEED

(inches / second)

20 - 63

63 - 200

200 - 630

630 - 2000

2000 - 6300

6300 - 20000

0.5

1.5

5

15

15

15

10

10

20

20

20

20

If the analyzer is swept too rapidly through a spectrum line, the line will appear to have the wrong frequency and amplitude, and the filter bandwidth will seem widened and distorted. Figure 3 -3 shows this effect. Each curve was plotted with a writing speed of 10 in/s. The curve with the higher peak shows the correct amplitude and frequency of its component. It was recorded with a sweep speed of 0.5 in/min. The other curve was plotted with a sweep speed of 5 in/ min, ten times faster than the maximum speed allowabl e for the frequency range covered in this plot.

Ill

0

..

..

~

"'

~

FREQUENCY MULTIPLIER Q!C 10 0 100

~5 o•

;! i:8

""'~

~~

..

5~

~~

~0

.. u•

.

0 1000

[1.568-tO[

40 dB

Figure 3-3. Effects of too ropid sweep speed.

Figure 3 -4 shows the effect of using a writing speed that is not high enough for the sweep speed used. Here each curve was plotted using a sweep speed of 15 in/min, a speed slow enough for the top two frequency ranges of the analyzer. The curve with the higher level was recorded with a writing speed of

20 in/ s, while the other curve, which shows incorrect frequency and level, was recorded with a writing speed of 3 in/s.

Table 3 -1 shows the maximum sweep speed and the maximum writing speed for each analyzer frequency range. Table 3-2 shows the minimum writing speed for each sweep speed.

Always use the slowest possible writing speed when recording with the Type 1521. When plotting a spectrum over the entire 20-Hz to 20-kHz frequency

TABLE 3-2

Minimum Writing Speed for each Sweep Speed

SWEEP SPEED

(inches / minute)

MINIMUM WRITING SPEED

(inches / second)

0.5

1.5

5

15

1

3

10

10 range with the recorder unattended, use a sweep speed of 0.5 in/min and a writing speed of 1 in/s. Total analysis time will be 70 minutes.

If an unattended recording is started at 63 Hz, a sweep speed of 1.5 in/min can be employed, and total time will be reduced to 23 minutes. This faster sweep speed and writing speed are permissible only if the spectrum is composed mostly of discrete frequency components •

The bandwidth of the analyzer at low frequencies is much narrower than necessary for practical randomsignal applications. Bandwidth requirements are determined by the fineness of detail expected in a spectrum, and "spikes" as narrow as a few tenths of a cycle in a random noise spectrum are very unlikely.

Moreover, the slowest recorder writing speed is not .

Ill

0

..

~

..

"'

~

FREQUENCY MULTIPLIER D to

0 100 B 1000 \t56'B-II[

Figure 3-4. Effects of too slow recorder writing speed.

14 TYPE 1568 WAVE ANALYZER

slow enough for a good plot of a noise band narrower than about 2 Hz (the bandwidth of the analyzer at 200

Hz). For this reason, use of the Type 1521 and Type

1568 to analyze noise at frequencies below 200 Hz is not recommended.

Above 200 Hz a good time average of noise levels will require the slowest possible sweep speed (0.5 in/min) and writing speed (1 in/s) except possibly in the top two frequency ranges, where a 1.5-in/min sweep speed and a 3 -in/s writing speed may yield an acceptable plot. Figure 3 -5 shows a spectrum -plot of pink noise recorded over the entire frequency range with a sweep speed of 0.5 in/min and a writing speed of 1 in/s. Note the large excursions in the lower two ranges.

To save time while plotting line -component spectra the user can increase writing and sweep speeds by one position manually each time the analyzer frequency range increases. The change can be conveniently accomplished when the analyzer is between ranges.

3.8.5 OPERATION. a. Set the external-motor switch on the Type

1521-P10B Drive Unit toward the rear of the instrument. b. Set the clutch level on the drive unit to IDLE. c. Set the right-hand chart speed lever to N

(neutral). (To release the levers for adjustments, pull them out.) d. Turn the MANUAL SET control to set the pen over the "2" line on the chart paper (FREQUENCY of 20Hz, 200Hz, etc), or over the "6.4" line for the red analyzer frequency ranges. e. Set the FREQUENCY dial to 2 (or 6.4 as required) and then the Drive Unit clutch level to NON

SLIP. The chart paper and analyzer are now synchronized. f. Set the analyzer FREQUENCY MULTIPLIER to the desired range and MULTIPLIER SWITCHING to

AUTO. g. Adjust the MAX INPUT VOLTS switch in accordance with the over -all input signal level (refer to paragraphs 3.6.2 and 3.7.2, step b, for details of this procedure). h. If the approximate level of the largest component(s) of the input signal is known, set the METER

RANGE switch to indicate a meter range just higher than this level.

If the component levels are not known, set the METER RANGE switch fully clockwise, and select the writing and sweep speeds in accordance with paragraph 3.8.4. The chart-drive speed indicated by the left-hand lever multiplied by the number indicated by the right-hand clutch lever is the actual speed. {Thrn the CHART DRIVE switch to FWD before moving the right-hand lever to X1 or X10). Make a dry (with the pen lifted from the paper) run to determine the maximum levels in the spectrum.

If the peaks in the spectrum are not high enough to register on the recorder, turn the METER RANGE switch four positions counterclockwise and repeat the run. i.

Adjust the METER RANGE switch so the maximum level will indicate near full scale and plot the spectrum.

3.8.6 INTERPRETING THE RECORDER INDICATION.

The rms detector in the Type 1521 Graphic

Level Recorder will correctly sum the level of sev-

( 4 r ii

~~

P"lltii:QUII:NCT MULTl . . ltl:lt • 10 0 toO

0 1000 u c

:;~

P"M:QUI:NCY MULT11"UIUII 0 10 • toO Q 1000

MULTlPUIEit 0 to 0 100 • 1000

Figure 3-5. Spectrum plot of signal generated by a pink noise generator, recorded by the Type 1568 • Type 1521 combination.

OPERATING PROCEDURE

15

eral closely spaced line components. Such a phenomenon is likely, for example, in the spectrum of a pulse or a tone burst. Togetanaccurate indication of these, the recorder WRITING SPEED switch must be set so that the LOW FREQUENCY CUTOFF indicaticm of this control is less than the separation in frequency between adjacent components.

For example, when plotting the spectrum of a short pulse having a 20-Hz repetition rate, set the writing speed to 3 in/s and the sweep speed to 1.5 in/min. Above 1000 Hz, the envelope, rather than the components, of the pulse spectrum will be plotted.

To determine the level of an individual component at a given frequency when there are several components in the same band use the expression

L = 10 LT

N,

L = level of individual component

LT =level indicated by the recorder f = repetition rate (frequency separation be-

0 tween components) f =frequency of component having level L.

In the case of a pulse or burst, and in that of many other signals, several factors limit the number of harmonics that can be measured with the recording wave analyzer to about 300.

16 TYPE 1568 WAVE ANALYZER

SECTION

4

APPLICATIONS

4.1 GENERAL.

To be classed as a wave analyzer, an instrument must have a very narrow bandwidth in order to allow the separation of closely spaced discrete frequency components. The filter must also have a high initial cut-off rate and high attenuation so that it can discriminate small frequency components in the presence of larger ones. It should be capable of "seeing" at least 70 dB into a spectrum. Further, the self-generated distortion of the filter should be so low that the analyzer, under normal conditions, cannot detect it.

The constant-percentage -bandwidth Type 1568

Wave Analyzer, and most constant-bandwidth analyzers qualify. The relative advantages of the Type

1568 and constant-bandwidth analyzers are pointed out in this section.

4.2 ANALYSIS OF SIMPLE PERIODIC SIGNALS.

Harmonic distortion is readily measured with either type of analyzer. The second harmonic, being closest to the fundamental, is the most difficult to discriminate. When the analyzer is tuned to the second harmonic, attenuation of the fundamental must be sufficient to reduce its level to less than that of the harmonic. Half-frequency attenuation in the Type

1568 is at least 75 dB independent of the frequency to which it is tuned.

The Type 1568, which will separate about 50 harmonics, is adequate for most purposes, though the number of harmonics separated depends somewhat on spectrum shape and accuracy requirements.

When many components of a simple periodic signal are to be resolved, there is an advantage in using a constant-bandwidth analyzer and a linear frequency scale for recording. The separate harmonics are equally spaced in frequency; so, if a constantbandwidth analyzer has sufficient attenuation to resolve the first few harmonics (it may not at low frequencies), it will resolve all harmonics within its amplitude and frequency limits. Since the bandwidth of the Type 1568 increases with frequency, eventually it will not be able to separate individual components at higher frequencies and will instead display the envelope of the spectrum. Figure 4-1 illustrates this effect. The envelope may be the only information required, since the frequency of each component would be known.

4.3 ANALYSIS OF MODULATED SIGNALS.

A periodic signal modulated with a simple periodic signal also has equally spaced components, the spacing being determined by the fundamental frequency of the modulating signal. Whether the

Type

1568 can resolve a carrier and side bands depends on the ratio of the carrier frequency to the lowest frequency component of the modulating signal. As a rule of thumb, the ratio must be less than 50:1.

Figure

4-1.

Frequency spectrum analysis of a 1.0-ms pulse at 70-Hz repetition rate.

APPLICATIONS 17

Figure 4-2. Chart records of vi brat ion acceleration spectrum of a motor and gear train assembly (see sketch). (a) A 1%-bandwidth analysis, taken with the

Type 1568. (b) A 1/3-octave analysis.

4.4 ANALYSIS OF DISCRETE COMPONENTS AT LOW

FREQUENCIES.

The bandwidth of the Type 1568 is reduced to

0.2 Hz at its low-frequency limit - much narrower than even the narrowest constant-bandwidth analyzers.

Thus at low frequencies it can separate components spaced only a fraction of a hertz apart. Further, in this range it does not have the annoying frequency drift usually associated with heterodyne instruments, and its frequency accuracy and dial resolution are far superior to that type of analyzer.

4.5 ANALYSIS OF NOISE SPECTRA.

Though the detail required in the analysis of noise spectra that contain no important discrete components does not warrant the use of a bandwidth as narrow as that of the Type 1568, the instrument can be used for this purpose. An automatically recorded analysis is usually desirable, but not mandatory. A slow meter speed is incorporated in the Type 1568 to facilitate manual analysis.

4.6 ANALYSIS OF SOUNDS PRODUCED BY MACHINERY

.

.

The Type 1568 Analyzer is well-suited for the production of fine spectrum analyses of the sound and/ or vibration produced by machinery. Such an analysis will shown various discrete frequencies and resonances which can then be related to motibn within the machine. Once the source of noise within a machine has been identified, the noise can be eliminated or reduced. This is often desirable for a variety of reasonsl (effect on man, mechanicalfailure, excessive wear, etc).

]Arnold Peterson,

Vibration : Problems, Measurements and Control ,

General Radio Preprint B 22 .

Figure 4-2 shows the vibration acceleration spectrum measured by the Type 1568 - Type 1521 combination on the housing of a machine employing a high-speed universal motor and gear train. For comparison, a one -third -octave spectrum is also shown.

The various sources of vibration which are identified include frequencies caused by motor armature, unbalance, and gear teeth meshing. The large component at 3270 Hz is critical from the standpoint of its effect on man, since it is in the frequency range where hearing is most acute. Reducing the level of the component by improving the gear design would markedly reduce the loudness and speech interference level of the sound. Various other components may be found critical when other aspects of the noise problem are considered. For example, bearing wear could be reduced by improving armature balance.

4.7 MIL-STANDARD-7408 (SHIPS)..

Mil-Standard-7408 (SHIPS) (Airborne and Structure -borne Noise Measurements and Acceptance Criteria of Shipboard Equipment) allows a narrow-band vibration analysis in the frequency range below 500

Hz when requirements cannot be met by a one-thirdoctave analysis. The acceptance limits are the same in either case. A narrow band is defined as " ••• a band whose width is not less than one percent nor more than 8 % of the band center frequency." This specification makes the Type 1568 an important tool for acceptance testing in accordance with the standard.

4.8 FREQUENCY MEASUREMENT OF A COMPONENT.

The analyzer can be used to select a signal component whose frequency is to be measured more accurately than the accuracy of the FREQUENCY dial will allow. The signal at the OUTPUT jack is used to drive a Type 1142 Frequency Meter and Discriminator or a counter (such as the Type 1150 Digital Frequency

Meter or the Type 1151 Digital Time and Frequency

Meter ).

18 TYPE 1568 WAVE ANALYZER

SECTION

5

PRINCIPLES

OF OPERATION

5.1 GENERAL.

The general principles of operation are discussed in paragraph 1.2.

In this section the various component parts of the analyzer will be described

(see the block diagram, Figure 5-1), The principles involved will be discussed to the extent that they may help the operator to use the instrument more effectively and to maintain proper operation.

5.2 INPUT.

The INPUT drives three cascaded attenuators, thefirsttwo ofwhich are operated by coaxial switches

(SlOl and S102) and act together to set the meter range of the analyzer. The first attenuator also determines the maximum voltage that can be applied to the analyzer and is adjusted by the black knurled dial labeled

MAX INPUT VOLTS. The second forms part of the

HIGH 0 FILTER SECrtON

R's VARIED WITH F!fEOUENCY CONTROL R/26

C'S VARIED W/711 FREQUENCY MULriPLIER CONTROL

S/0~

IOC

ly-e-

RNCTION SWITOH

, . - - - - - - - - ,

NORMAL ATTENUATOR

X NPt/T 0/AL

~

-=

Sl()f

/O dB STEPS

CAL./BRAT'EI

'101 TO 70d8

FROM CALIBRATIQN

NETWORK

LOW 0 FILTER SECTION

R'S VARIED WITH FREOUENCY CONTROL

C's VARIED WITH FREOUENCY MfJLrtPLICR CONTROL

AT7TNUATOR

METER RANGE KNOB

IO dB STePS

S/02 TO .JOdB

TO FUNCTION SWITQf S/04

METER AMPLIFIER

()201 AVERAGE

DETECTOR

AND DAMPfNG

C/RCtJIT

M

Figure 5-1. Block diagram of the Type 1568.

OUTPUT

r-

PRINCIPLES OF OPERATION 19

analyzing attenuator and is adjusted by the METER

RANGE clear plastic dial and grey knob. The last attenuator is the continuously adjustable CAL control which is used for amplitude calibration. The attenuators are arranged to present a nearly constant impedance of 100 kn to the INPUT connectors.

5.3 FILTER.

The filter consists of an isolated cascade of two active, synchronously tuned, RC -resonant sections, the "High Q" section and the "Low Q" section. Maximum sensitivity to tuning potentiometer tracking error between sections would occur if the Q 's of the filter sections were equal (Q

=

1/filter-section dissipation factor), hence the difference between sections. The audio range (20 Hz to 20 kHz) is covered in six bands, each spanning half a decade (range of 3.16 to 1). Close tolerance capacitors (C105 - CllO, Cll3 - Cll8, C124

- C129, and C132 - C137) are switched by S103 to change ranges. Within any one range, the instrument is tuned by means of a four -gang potentiometer, R128, whose resistance -versus -angle characteristic produces a logarithmic frequency scale on the FRE-

QUENCY dial.

INPUT

REFERENCE

VOLTAGE

-.--H

Figure S.3. Filter amplifier with constant current source or emitter load. lSU.ll

Figure S.2. Basic filter amplifier simplified schematic diagram.

In the design of filter sections such as those in the Type 1568, a trade-off between sensitivity to component-value changes (and to tuning-potentiometer tracking errors) and sensitivity to amplifier gain is possible. The Type 1568 filter sections are designed for low sensitivity to tracking errors in tuning pot entiometer (and also to drift in all passive components).

The result is a high sensitivity factor to change in the gain of the amplifier. But the unity- or near unitygain series -voltage -feedback amplifiers in the filter sections have extremely high gain stability. This stability, as well as a very high ratio of input to output impedance is attained through the use of one NPN and two PNP transistors in the configuration shown in

Figure 5-2. This basic amplifier circuit is used for the two driver amplifiers as well as for the four filter amplifiers. A constant-current source (Q110, Q121) is added in place of the emitter resistor (see Figure

5-3) in two of the amplifiers. The constant-current source maintains the stray loading impedance on the network connected to the amplifier input to be a constant fraction of the network's impedance as the filter is tuned within each range. This further reduces variation in filter Q with tuning.

Constant gain around the filter fee<iback loop for each frequency range is arranged for by the inelusion of a trimming resistor for each frequency range (R178 - R183 and R134 - R139) in the emitter circuit of one of the amplifiers in each filter section.

These resistors are switched along with the rangedetermining capacitors by the FREQUENCY MULTI-

PLIER switch, S103.

,-------------~------------~--·+~EG

TO $104, 203R

(CALl

TO METER

AMPLIFIER

(Q201)

C205

Figure S.4. The filter output amplifier.

20 TYPE 1568 WAVE ANALYZER

+17.6V

R202

CLOSED FOR

FUNCTION: SLOW

·---------.

5104

FROM R204

Q203o-~Nr--~~~

COLL

R205

R224

5104 ,,

..

,.

Figure 5-5. The Type 1568 meter circuit.

Each filter section has its own two -transistor series-type voltage regulator (Q111, Q112 and Q113,

Q114), since the sections require low-impedance power supplies. This arrangement also prevents one section from interacting with the other through a common power-supply connection.

As indicated by the block diagram, sections of the analyzing attenuator (controlled by the METER

RANGE switch S102) are included between the two filter sections and after the last section. Separation of the analyzing attenuator into three sections maintains dynamic range over a wide range of input levels.

5.4 OUTPUT.

A final amplifier consisting of Q202 and Q203 amplifies the filtered signal for application to the meter circuit and output buffer (see Figure 5-4). The buffer amplifier isolates the OUTPUT terminal so that performance of the Type 1568 is not affected by the loading of this terminal.

The filtered signal reaches the filter -output amplifier via SlOS, whichgrounds the input of the output section each time the FREQUENCY dial (filtertuning potentiometer) is swept through its blank region.

This switching facilitates use of the Type 1568 with the Type 1521 when the automatic FREQUENCY-

MULTIPLIER -switching feature is used, as it prevents range-changing transients from appearing at the

FROM

OUTPUT 5104

AMPLIFIER CLOSED FOR

(Q203 FUNCTION•CAL

R220

OUTPUT jack. The meter amplifier Q20l, shown in

Figure 5-5 drives a diode -bridge meter rectifier.

This bridge instead of being connected between the amplifier and ground, is returned to the amplifier input via current divider R205 and R224. This negative feedback compensates for the effects of the amplitude non-linearity of the average-detector diode circuit.

5.5 CALIBRATOR.

The feedback-type amplitude calibrator (see

Figure 5-6) operates as follows: When the FUNCTION switch is set to CAL, a signal from the filter-output amplifier is fed to the input of the filter through a limiter and reference attenuator (R222 and R223).

When the gain of the analyzer is adjusted, by means of the CAL control, to equal the loss in the feedback path, the system oscillates, signifying that the instrument is calibrated. The frequency of oscillation is determined by the center frequency of the filter, and this calibration can be made at any selected frequency.

5.6

POWER SUPPLY.

A simplified diagram of the power supply is shown in Figure S-7. The battery supplied is a rechargeable nickel-cadmium unit which also serves as a ripple filter for line operation. As shown, the builtin charger operates from the ac line.

TO CAL POTENTIOMETER

VIA INPUT TERMINAL

5104

OPENFO~

FUNCTION'

-=

R223 CAL,CK BAT, CHARGE

R221

,

......

Figure 5-6. The Type 1568 calibration network.

PRINCIPLES OF OPERATION 21

S504

(COAXIAL

WITH SI04) f

TRANSFORMER,

RECTIFIER ,

....------POWER SUPPLY

Sl04 • ., OUTPUT

(CLOSED FOR

ALL FUNCTIONS

BUT "CHARGE")

5104 (CLOSED FOR ' CK BAT,'

'CHARGE")

1

AND

FILTERS

MULTIPLIER

SWITCHING

TURNS

SI03

Figure

S-7.

Simplified schematic diagram of the power-supply circuits.

22

TYPE

1568

WAVE ANALYZER

SECTION

6

SERVICE AND MAINTENANCE

6.1 WARRANTY.

We warrant that each new instrument manufactured and sold by us is free from defects in material and workmanship, and that, properly used, it will perform in full accordance with applicable specifications for a period of two years after original shipment.

Any instrument or component that is found within the two year period not to meet these standards after examination by our factory, District Office, or authorized repair agency personnel, will be repaired, or at our option, replaced without charge, except for tubes or batteries that have given normal serv~ce.

6.2

SERVICE.

The two-year warranty stated above attests the quality of materials and workmanship in our products.

When difficulties do occur, our service engineers will assist in any way possible. If the difficulty cannot be eliminated by use of the following service instructions, please write or phone our Service Department (see rear cover), giving full information of the trouble and of steps taken to remedy it. Be sure to mention the serial, type, and ID numbers of the instrument.

Before returning an instrument to General Radio for service, please write to our Service Department or nearest District Office requesting a "Returned

Material Tag". Use of this tag will ensure proper handling and identification. For instruments not covered by the warranty, a purchase order should be forwarded to avoid unnecessary delay.

6.3 ACCESS Tp COMPONENTS.

To obtain access to the components of the wave analyzer, remove the four 10-32 screws holding the instrument to its case, then lift the panel and instrument out of the case and place it front down on the bench. The power supply etched -board circuit assembly is mounted on hinges so that it can be swung upwards to reveal the wiring and components below.

This requires only the removal of the two screws at the top of the board.

The output amplifier circuit assembly is mounted on a plug-in etched-board, which can be easily pulled out with the removal of the two screws at the top of the board.

The High-Q and Low-Q etched -board circuit assemblies, which are also mounted on plug -in boards, and the control boards, which contain potentiometers

R134 through R139 and Rl78 through R183, are located behind the plate in the center of the instrument. To obtain access to these, remove the four screws on the top of the plate and the one small screw holding the plate to the side of the instrument, and lift off the plate. S103 and the capacitor boards are also located beneath this plate. Figure 6-1 will aid in the location of the various switches in the Type 1568.

6.4

MINIMUM PERFORMANCE SPECIFICATIONS.

The following procedures are recommended for incoming inspection or periodic checks. The test described will reveal whether the instrument meets catalog specifications. Instructions for calibration of the Type 1568 are contained in paragraph 6.5.

6.4.1 EQUIPMENT REQUIRED.

Sine -wave Oscillator.

Range: 20 Hz to 20 kHz

Output: 1.5 V into 600-n load (10 mW)

The Type 1309 Oscillator is recommended.

Frequency~.

C...()V t'f

T ER

Range:

20

Hz to 20kHz

Accuracy: greater than 0.2% \

lq1.

~OUN

The Type 1191 Counter or the Type

.U.

4~ -¥'P?'¥1AP£y

~ietcr

and DiserihtinateP is recommended.

AC Voltmeter.

Range: 0 to 10 V

Accuracy: ±2%

The Type 1806 Electronic Voltmeter is recommended.

Attenuator.

Impedance: 600 n

Attenuation: 100 dB in 0.1-dB steps

The Type 1450 -TB Decade Attenuator is recommended.

S.

QUt\ 0

L.E"EL

M~ Eft

\ 5'

5 \

SERVICE AND MAINTENANCE 23

FUNCTION

(5104) l08R 105R

!

105A

CAL

CI<,8AT

CHARGE

ff __

F~E~U:_N:_v ~~~~E~ (r~

__

;1

,----l...-., 5102,

SECTION 2

OdB(I,Z) 10d8(3),

ZOdB(4), 30 d8(5,6,7)

I

I

I

1

1

I

r-~-------

----:--

RI28,A,B MULTIPLIER

--f{--/-:

I RI28,C,D

I

_,I

SWITCHING (5502) 1 '-.. _

AUTO 5105

I

LJI~ ..§~~

I

_M~~L-

J

TO AC LINE

15612 2

FUNCTION (5104)

POWER(5504)

~

,/coAXIAL

,..Y

WITH 5104

Figure 6-1. Switch locations in the

Type 1568. Numbers in parentheses in filter sections indicate switch position from fully clockwise ( 1) to fully counterclockwise (7).

~O \'lH t::L\

~ROu

S"tf{~P

"tO

L\)~

9

1

ER.tf\

\

t\Aa..

Oscilloscope.

Input Impedance: 1 MQ

Vertical sensitivity: calibrated

The Tektronix Model 503 Oscilloscope is r e commended.

600-Q Resistor.

The Type 500 -G Resistor is recommended.

10 -kQ Resistor.

Patch Cords.

3 Double Plug to Double Plug (Type 274-NPM is recommended.)

2 Double Plug to Telephone Plug (Type 1560-P95 is recommended.)

1 Cannon 3 -connector Plug to Telephone Plug.

(Type 1560-P99).

NOTE

The sine-waveoutputof the Type 1309 Oscillator is to be used throughout the following tests. All OUTPUT settings are given in volts, rms.

6.4.2 PRELIMINARY TESTS.

Meter Accuracy. Assemble the test equipment as shown in Figure 6-2. c:

Type 1309: FREQUENCY -1 kHz,OUTPUT- IV"

Type 1450-TB: Attenuation - 22 dB.

Type 1568: FUNCTION -FAST, FREQUENCY

1kHz, MAX INPUT VOLTS - 0.1, METER RANGE -

100 mV/-20.

Adjust the Type 1568 FREQUENCY control for a peak, then adjust the CAL control for a reading of 0 on the

TABLE 6-1

Meter Check

Seuing of Type 1450·TB

Attenuator (dB)

20

30

37

Meter Indication of Type 1568

+2

-8

-15

600.0.

TYPE 1309

OSCILLATOR

TYPE 1450 : TB ot--.-----.--to

DECADE

ATTENUATOR ot-+--<>---+-~1--o

~--------------~

TYPE

Figure 6-2. Set up of equipment for testing minimum performance specifications.

1568

TYPE 1191

COUNTER

TYPE

1806

TYPE 1551

SOUND-LEVEL

METER o t - - - - ' i

TO

OUTPUT

0

CRO

24 TYPE 1568 WAVE ANALYZER

Setting of Type 1450-TB

Attenuator (dB)

10

0

60

50

40

30

80

90

70

60

50

40

30

20

TABLE 6-2

Attenuation Check

Max Input Volts

0.1

0.3

1

3

10

30

100

300

0.1

0.1

0.1

0.1

0.1

0.1

Meter Range

1 mV/-60

3 mV/-50

10mV/-40

30 mV/-30

100 mV/-20

300 mV/-~10

1 V/0

3V / +10

3 mV/-50

10 mV/-40

30 mV /-30

100 mV/-20

300 tJV/-70

100 tJV /-80

INPUT VOLTS switch and METER RANGE switch against the attenuation set by the Type 1450-TB according to Table 6-2. At each position, the meter r~ading of the Typ e 1568 should be 0 ±0.3 dB. Repeat the abov e

· test at 20 Hz. The meter should indicate 0 ±0.3 dB at all positions. Repeat the test at 20kHz. The meter should read 0 ±0.4 dB at all positions.

6.4.3 GAIN CHECK.

Use the set -up of Figure 6-2.

Set: Type 1309: FREQUENCY -1kHz, OUTPUT- 2.5 V

Type 1450-TB: Attenuation 22 dB

Type 1568: MAX INPUT VOLTS - 0.1, METER

RANGE -100 mV/-20 (both controls fully cw), FRE-

QUENCY MULTIPLIER 100 (red).

Tune for a peak at 1 kHz (Range 4). Adjust the CAL • control for a full-scale reading.O~ e.E""(~M~ ~_,'-'- )(,~ \.1:.

6.4.4 FREQUENCY CALIBRATION AND PEAK RE-

SPONSE UNIFORMITY.

~

@scale. Test whether the Type 1568 meter corresponds to the settings of the attenuator (Table 6

-1).

The meter readings should be within ±0.2 dB of those specified in Table

6-1.

Repeatthetestwith the FUNC-

TION switch set to SLOW. The results should be the same, except that the meter will be highly damped.

Assemble the test equipment as shown in Figure

~ '

?

Set: Type 1309: FREQUENCY - 1kHz, OUTPUT-

1

V

Type 1450-TB: Attenuation 20 dB

Type 1568: FUNCTION FAST: MAX INPUT

VOLTS- 0.1, METER RANGE -100 mV/-20, FRE-

QUENCY - 1 kHz.

Adjust the Type 1309 Oscillator for a peak meter

Attenuation. Use the set -up of Figure 6-2 . reading on the Type 1568, then adjust the CAL control for a reading of [email protected]:g)

The peak frequency as read on the .fi

eeJ:t1eiJe) metet

must be between 990 and 1010

Set: Type 1309: FREQUENCY -1 kHz, OUTPUT- 2.5 V.

Type 1450-TB: Attenuation 70 dB

Type 1568: FUNCTION -

F~ST,

MAX INPUT

VOLTS - 0.1, METER RANGE · 1 mV/-60.

Adjust the Type 1568 FREQUENCY dial for a peak indication. Adjust the CAL control for a reading of 0 on the~ z. eck both FREQUENCY dial accuracy and uniformity of peak amplitude at the frequencies listed in

Table 6-3. Record the amplitude at each frequency.

The difference between the highest and lowest amplitude readings between 20 Hz and 6.3 kHz must not

TABLE

6-3 C..O\J

" \

€:(

Frequency and Peak Response Test

Frequency

Multiplier

Frequency

Control Setting

Limits

Record

Peak Amplitude

10 (red)

100~

il-.4\

t.t(

100 (red)

1000 (red)

2.0 (20Hz)

3.5 (35 Hz)

6.3 (63 Hz)

6.4 (64Hz)

10.0 (100 Hz)

20.0 (200 Hz)

2.00 (200 Hz)

3.50 (350 Hz)

6.30 (630 Hz)

Period: 0.05050 to 0.04950 seconds

Period: 0.02886 to 0.2828 seconds

Period: 0.01598 to 0.01567 seconds

Period: 0.01578 to 0.01547 seconds

Period: 0.01010 to 0.00990\ seconds

Period: 0.005050 to 0.004950 seconds

Period: 0.005050 to 0.004950 seconds

Period: 0.002886 to 0.002828 seconds

Period: 0.001598 to 0.001567 seconds

6.40 (640 Hz)

10.0 (1000 Hz)

20.0

(2

kHz)

Period: 0.001578 to 0.001547 seconds

Frequency: 990.0 to 1010 Hz

Frequency: 1980 to 2020 Hz

2.0~5

3.5

~kHz)

Frequency: 3465 to 3535 Hz

6.3 ( . z Frequency: 6237 to 6363 Hz

6.4 (6.4 kHz)

10.0 (10 kHz)

15.0 (15kHz)

20.0 (20 kHz)

Frequency: 6336 to 6464 Hz

Frequency: 9900 to 10,100 Hz

Frequency: 14, 850 to 15,150 Hz

Frequency: 19,800 to 20,200 Hz

Set reference level

SERVICE AND MAINTENANCE 25

soon

!TYPE 1450-TBJ

7.5 Kn 7.5Kn

.0471'-F .0471'-F

-TYPE 1568 INPUT

Figure 6-3. Filter network to attenuate test·osci llator distortion. exceed 2 dB. The difference from 20 Hz to 20 kHz must not exceed 4 dB. The frequency must be within

±1% over the entire range.

Adjust the Type 1568 FREQUENCY dial for a peak, then adjust the CAL control for a meter reading of 0

@9

Set: FREQUENCY dial - 2 (2 kHz)

METER RANGE- 1 mV/-60

6.4.7 DISTORTION.

NOTE

The power line must be connected for all noise and distortion checks.

Use the set-up of Figure6-2.

6.4.5 FILTER ATTENUATION.

Use the same set up used for frequency and amplitude response tests (paragraph 6.4.4).

Set: Type 1309: FREQUENCY -1 kHz, OUTPUT - 1 V

1

Type 1450-TB: Attenuation - 0 dB

Type 1568: FUNCTION- FAST, FREQUENCY -

1 kHz, MAX INPUT VOLTS - 1, METER RANGE -

V/0.

The meter should read greater than 75 dB down from peak amplitude (less than

-15~on this range).

Set: FREQUENCY dial -3 (3 kHz)

The Type 1568 meter should read below the 0.5-V line on the upper scale (85 dB below peak).

Set: Type 1309: FREQUENCY -1 kHz, OUTPUT - 1 V

Type 1450-TB: Attenuation - 0 dB

Type 1568: FUNCTION - FAST, MAX INPUT

VOLTS- 1, METER RANGE- 1 V/0.

1\me the Type 1568 FREQUENCY for a peak meter reading at 1 k~~ for an indication of +2 B •

SettheTypel568: QUENCY -2kHz, METER

RANGE -1 mV/-60.

~

The analyzer meter must indicate less than -13 BM

(equivalent to75dBbelowpeak). VarytheFREQUE Y slightly around 2 kHz to see that there is no peaking.

See note in paragraph 6.4.5.

6.4.8 NOISE.

Use the set-up of Figure 6-2. Connect a Type

1551 Sound Level Meter to the OUTPUT jack of the

Type 1568.

NOTE

The 1568 must be in its cabinet for this check.

Output Noise. This procedure checks the noise level in all sections after the first filter (High Q) section.

The first-filter noise is attenuated by 30 dB in the attenuator. caused by distortion produced by the test oscillator. A filter network (Figure 6-3) will attenuate the output of the oscillator at these frequencies.

NOTE

If there is peaking at 2 or 3 kHz, it may be

6.4.6 OUTPUT AND CREST FACTOR.

Use the set-up described in paragraph 6.4.3.

Set: Type 1309: FREQUENCY -20kHz,OUTPUT-l V

Type 1450-TB: Attenuation - 21 dB

Type 1568: FUNCTION - FAST, MAX INPUT

VOLTS- 0.1, METER RANGE- 100 mV/-20.

Peak the analyzer FREQUENCY at 20kHz, then adjust the CAL control for a full scale (10) reading on the meter. Connect a 10 -kn resistor across the OUTPUT jack of the Type 1568 and measure, using the oscilloscope, the voltage across it, which should be between

0.6 and 0.9 V.

~

Apply the voltage across the 10-kn resistor to the vertical input of an oscillosco e. Reduce the attenuation of the Type 14500 ere should be no clipping of the output signal. Repeat the above test at a frequency of 20 Hz.

Set: Type 1309: FREQUENCY -10kHz, OUTPUT -1 V

Type 1450 -TB: Attenuation - 40 dB

Type 1568: MAX INPUT VOLTS - 0.1, METER

- 10 mV/-40, FREQUENCY MULTIPLIER-

\ ()QO~r ed).

Type 155lt Attenuator - 120 dB, METER-FAST

WEIGHTING - 20 kc.

Adjust the Type 1568 FREQUENCY dial for a peak at

10 kHz and the CAL control for a full-scale meter reading. Adjust the Type 1551 CAL control for a full scale reading on its meter. emove e pe 1309 short the input of the Type 1 68. The 1551 must now indicate less than 65 dB (equivalent to 65 dB below full scale).

Repeat at a frequency of 100 Hz. The Type 1551 must now indicate less than 55 dB (equivalent to 75 dB below full scale).

Front End Noise. This test checks the noise level of all stages, but the noise is predominantly from the first filter (High Q) section. Set the Type 1568 METER

RANGE knob to 100 IJV/-80 (fully ccw). Check for noise as before using the Type 1309 (for a 100-IJV signal into the analyzer) and the Type 1551. At 10

26

TYPE 1568 WAVE ANALYZER

TYPE 1309

OSCILLATOR

TYPE 1450-TB

DECADE

ATTENUATOR

600.0.

~

L....:.._j

TYPE

1568

SI02, 207R

/(RED CABLE)

I

TYPE

314

VTVM

I

TYPE

1191

COUNTER i=-

TYPE

1806

Figure 6-4. Set-up of equipment for alignment of the Type 1568 filter. kHz the Type 1551 must read l ess than 100 dB (equivalent to 30 dB below full scale). At 100 Hz the pe

1551 must read les~ [email protected] (equiva~ent to dB below full scale). A geaph of typical noise levels vs frequency for various t enuation settings is presented inSection3. qQ

'tO

6.5

CALIBRATION PROCEDURE. p

~

S

PSC.

S

E-PT-

lQ

TZ.

6.5.1 GENERAL.

Each step in the calibration of the Type 1568 should be p erformed in sequence since one step serves as a foundation for the next. The Type 1568 incorporates the high reliability one expects of conservatively designed semiconductor circuits and routine calibrations are unnecessary. Calibration will be necessary only if components in the filter section have been replaced.

CAUTION

Always run the instrument through the mm1mum performance tests of paragraph 6.4 to deterrr ine if calibration is required before proceeding. Calibration of the Type

1568 is a rather involved procedure and could lead to difficulty unless carefully performed with the use of proper equipment and testing procedures.

The various components referred to in the calibration proc ed ur e are pointed out in Figure 6-5.

NOTE

The meter of the analyzer must indicate at least in the middle of the BAT region when the FUNCTION switch is set to CK BAT. If it does not, charge the battery for several hours before proceeding with the calibration.

6.5.2 EQUIPMENT REQUIRED.

The equipment required to calibrate the Wave

Analyzer is the same as that required to test the minimum performance specifications (refer to paragraph

6.4), with three exceptions:

1. An oscilloscope is not required.

2. A sound level meter is not required.

3 . For calibration, a VTVM having an input impedance of at least 10 MQ and sensitivity of 1 mV is required. The Ballantine Model 314 is recommended.

6.5.3 FILTER ALIGNMENT, HIGH Q SECTION.

Assemble the test equipment as shown in Figure

6-4. The Model 314 Voltmeter is connected between terminal 207R of S102 and ground (see Figure 6-5 and paragraph 6.3.

Set: Type 1309: FREQUENCY -640

Hz, OUTPUT-1 V.

Type 1450-TB: Attenuation 40 dB.

Type 1568: FREQUENCY MULTIPLIER - 100

(red), MAX INPUT VOLTS 0.1, METER RANGE - 10 mV/-40, CAL control-centered, FUNCTION- FAST. a. Tune the analyzer FREQUENCY control for a peak reading on the Model314 meter.

If necessary, loosen the setscrews on the FREQUENCY dial, adjust it to read 640 Hz, then retighten the screws. b. Adjust the Type 1450 -TB Attenuator so that the Model 314 indicat es a convenient value when the

FREQUENCY dial is set for the peak. Record this value for future reference. c. Set:

Type 1309: FREQUENCY -2kHz, OUTPUT - 1 V

Type 1568: FREQUENCY MULTIPLIER - 100

(red), FREQUENCY control - 20.0.

Adjust the oscillator frequency to obtain a peak reading on the Model 314. Adjust R126 and R140 to obtain a peak frequency at 2 kHz and at the same time a peak voltmeter reading of the same amplitude as in b.

(Rl40 changes both amplitude and frequency in the same direction; R126 changes them in opposite directions.) d. Repeat steps a, b, and c if necessary. e . Set:

Type 1568: FREQUENCY MULTIPLIER - 100

(red), FREQUENCY control 11.0 (1.1 kHz)

Type 1309: FREQUENCY -110 Hz, OUTPUT -1 V

Adjust the Type 1450-TB Attenuator for a reading of

0.003 Von the Model 314. Set the FREQUENCY of the

Type 1309 to 1.1 kHz, adjusting slightly to obtain a peak reading on the Model 314. Adjust R137 for a reading of 0.24 Von the Model 314.

SERVICE AND MAINTENANCE 27

f. Adju!;!t all other ranges, tuning for a peak at the frequency indicated in Table 6 -4 and adjusting the respective potentiometer for a reading of 0.24 V

011 the Model 314. On the last range (red 1000), adjust trimme~

C119 first to get a peak reading at 6.4 kHz, then adjust Rl39 to obtain a reading of 0.24 Vat 11kHz.

Frequency

Multiplier

TABLE 6-4

Filter Alignment, High

Q

Section

Frequency

Control Adiust

1000 (red)

1000 (red)

10 (red)

10 (white) '

100 (white)

1 000 (white)

11.0 (6.4 kHz)

11.0 (11 kHz)

11.0 (110Hz)

3.5 (35Hz)

3.5 (350Hz)

3.5 (3.5 kHz)

C119

Rl39

Rl35

Rl34

Rl36

Rl38 h. Adjust all other ranges, tuning for a peak at the frequency indicated in Table 6 -5 and adjusting the respective potentiometer for a reading of 8 mV on the

Type 1568 meter. On the last range (red 1000), first adjust Cl30 to get a peak reading at6.4 kHz, then adjust Rl83 to get a reading at 11 kHz.

Frequency

Multiplier

TABLE 6-5

Filter Alignment, Low

Q

Section

Frequency

Control Adiust

10 (white)

1000 (white

1000 (red)

1000 (red)

100 (red)

10 (red)

3.5 (35Hz

3.5 (3.5 kHz)

11.0 (6.4 kHz)

11.0 (11 kHz)

11.0 (1.1 kHz)

11.0 (110Hz)

R178

R182

Rl30

Rl83

R181

R179 i.

Resolder the red cable to Sl02, 207R.

6.5.4 FILTER ALIGNMENT, LOW Q SECTION.

Use the setup of Figure 6-4 except disconnect the Model 314 and unsolder the red cable from Sl02,

207R. Remove the input (supplied by the Type 1309) from the front panel jack and connect it to Sl02, 207R.

Set: Type 1309: FREQUENCY 200 Hz, OUTPUT-

1 v.

Type 1450-TB: Attenuation - 10 dB.

Type 1568: FREQUENCY MULTIPLIER - 100

(white) a. Adjust the Type i568 FREQUENCY control for a peak reading on the Type 1568 meter (around 2 on the dial). b. Adjust the Type 1450 -TB so that the analyzer meter indicates a convenient value when the FRE-

QUENCY control is set for the peak. Record this value for future reference. c. Set the Type 1568 FREQUENCY control to

6.~,

FREQUENCY MULTIPLIER to 100 (white), and adjust the Type 1309 FREQUENCY for a peak reading on the meter of the Type 1568. d. Adjust Rl63 and Rl72 to obtain a peak frequency at 630 Hz and a peak meter reading of the same amplitude as that recorded in b. (Rl63 changes both amplitude and frequency in the same direction; Rl72 changes them in opposite directions.) e. Repeat steps a, b, c, and d if necessary. f. Set:

Type 1309: FREQUENCY 3.5 Hz, OUTPUT-

IV

Type 1568: FREQUENCY control 3.5, FRE-

QUENCY MULTIPLIER 100 (white), MAX INPUT

VOLTS - 0.1, METER RANGE -300 llV/-70.

Adjust the Type 1450 -TB for a reading of 200 flV on the analyzer meter. g. Set:

Type 1568: METER RANGE- 10 mV/-40.

Type 1309: FREQUENCY -350Hz.

Adjust Rl80 for an analyzer meter reading of 8 mV.

6.5.5 SWITCH PHASING.

Blanking Switch. Adjust the blanking switch wiper part number 1568-1221 (see Figure 6-5), so that it blanks the output signal starting at a point about 1/8 in past the "20" point on the FREQUENCY dial. Note that the signal remains shorted throughout the entire blank area of the FREQUENCY dial, and that it opens again at least 1/8 in before it gets to the "6.3" point on the dial.

NOTE

The wiper arms should have adequate pressure on the track, and they should be bent so that they are parallel to the track surface.

Multiplier Switching. Adjust the hub assembly, part number 1568-1120, on the rear of the right-hand potentiometer (see Figure 6-5) so that the microswitch is activated about a third of the way through the blank area of the FREQUENCY dial (in the direction of increasing frequency).

Connect the Type 1568 to the power line and set the MULTIPLIER SWITCHING switch to AUTO. Note that the FREQUENCY MULTIPLIER switch changes range each time the FREQUENCY dial is swept through the blank region.

It should take less than 5 s for the capacitor

C501 to recharge so that it will switch the motor a second time. A longer recharge time may indicate a faulty rectifier circuit or capacitor.

Set the MULTIPLIER SWITCHING switch to

MANUAL. The FREQUENCY MULTIPLIER switch should not change ranges when the FREQUENCY dial is swept through the blank area.

6.5.6 PEAK RESPONSE ADJUSTMENT.

Perform the frequency and response uniformity testofparagraph6.4.3, ifyouhave not done so already.

28 TYPE 1568 WAVE ANALYZER

Q201

Q202

Q203

Q204

HIGH

Q

SECTION

Measurement to ground from:

Q101

Q102

Q103

Q104

Q105

Q106

Q107

Q108

Q109

QllO

Q111

Q112

E c

E c

E c

E c

E c

E c

E c

E c

E c

E c

E c

E c

OUTPUT AMPLIFIER

E c

E c

E c

E c

1.85

11.9

1.30

4.50

3.90

9.3

2.80

12.0

TABLE

6-6

De Voltages

de volts

LOW

Q

SECTION

Measurement to ground from:

9.5

13.7

14.2

9.5

14.3

9.4

15.0

9.4

1.00

9.4

14.4

15.5

15.0

21.0

15.0

9.5

9.0

13.7

14.3

9.8

15.0

9.8

9.4

13.7

Q113

Qll4

Qll5

Q116

Qll7

Q118

Qll9

Q120

Q121

Q122

Q123

Q124

E c

E c

E c

E c

E c

E c

E c

E c

E c

E c

E c

E c

POWER SUPPLY SECTION

AT508

C502+

AT512

Note: Letter E refers to transistor emitter; C refers to collector.

60.0

48.0

21.0

de volts

1.10

8.8

8.6

14.2

14.9

9.3

15.5

9.3

15.5

9.8

8.8

14.2

14.9

8.8

15.5

8.8

15.0

16.0

15.5

21.0

9.8

14.2

14.9

9.8

SERVICE AND MAINTENANCE

The difference between the highest and lowest amplitudes in the 20-Hz to 20-kHz range must not exceed 4 dB. Furthermore, the highest and lowest points must both occur in the highest frequency range (FRE-

QUENCY MULTIPLIER set to red 1000). If this is not the cas e , adjust Rl83 to center this range on the other ranges, that is, make the maximum amplitude of the highest range greater than the maximum of any other range, and the minimum lower than any other minimum amplitude.

6.5. 7 CAL CIRCUIT ADJUSTMENT.

Set: Type 1309: FREQUENCY - 1kHz, OUTPUT - 1

V _ (exactly).

Type 1450 -TB: Attenuation -40 dB.

Type 1568: FUNCTION FAST: MAX INPUT

VOLTS- 0.1, METER RANGE- 10 V/-40(both white dots on attenuator controls at 12 o'clock).

Adjust the FREQUENCY controls of th e Type 1568 for a peak at 1 kHz (range - red 100). Adjust the CAL control for a full-scale (10) reading . Set the FUNC-

TION switch to CAL, and adjust R222 (on the power supply board) until the meter reads in the middle of the CAL area.

Set: Type 1568: FUNCTION - CAL, FREQUENCY

MULTIPLIER - 100 (red), FREQUENCY control- 20.0.

Adjust the CAL control to read in the middle of the

CAL area on the meter. S e t the FUNCTION switch to

FAST. Adjust the Type 1309 FREQUENCY for a peak at 20kHz. The Type 1568 meter must read between

9.6 and 10.4.

6.6 TROUBLE ANALYSIS.

6.6.1 GENERAL.

The Type 1568 Wave Analyzer needs no routine maintenance. If difficulties arise, the following information is provided to aid in localizing the trouble.

Refer to Section 5 and Figures 6-6 and following for information concerning the operation of the analyzer.

6.6.2 VISUAL CHECK.

If the analyzer does not function properly when operated according to the instructions in Section 3, perform the following checks to locate any immediately obvious failures: a. Look for any sign of damaged components, such as broken resistors, burned capacitors, and the like. b. Look for any loose conductors, e.g., screws, bits of solder, that may have fallen into the instrument. c. Look for broken cables. Sometimes a broken wire is held in place by its insulation, so that it is necessary to apply a slight pulling pr e ssur e to the wire to find a break. Perform this test on the cables l e ading to anchor terminals and switches.

6.6.3 BIAS CONDITIONS.

Table 6-6 lists the de voltage levels to be expected at the e mitter and collector of each transistor in th e Type 1568. These voltages wer e measured with a VTVM and are typical values. Individual instrum e nts should agree within ±10% of the values given when measured under the following conditions.

Line voltage . . . . . 115 V ac (or 230 V ac)

FUNCTION . . . . . FAST

BATTERY . . . . . Fully charged (9.6 V)

All other controls .. Any position

Refer to Figures 6-6 through6-14 as well as 6-1, for location of various test points.

6.6.4 AC VOLTAGE LEVELS.

To check the active operation of the various sections of the analyzer proce e d as follows: a. Apply a 1-V, rms, 1-kHz signal from the

Type 1309 to the INPUT of the analyzer via the Type

1650 -P95 Patch Cord. b. Set:

MAX INPUT VOLTS - 1

METER RANGE - 1 V (0 dB)

FUNCTION FAST

FREQUENCY MULTIPLIER 100 (red

FREQUENCY dial -Around 10 (1\me for a peak indication on meter or, if non -functioning, a peak on the CRO at the first test point.)

CAL control - Center (white dot up) c. Observe the waveform at the points listed in

Table 6-7 on an oscilloscope which has an input sensitivity of at least 10 m V / div. The peak -to -peak voltages should agree with those in Table 6-7 to within ±20%. There should be no trace of distortion except where noted. Refer to Figures 6-6 through 6-14, as well as Figure 6-1, for locations of the test points.

TABLE 6-7

Typical Ac Voltage Levels

Observe between ground and:

Peak-to-Peak Voltage

S0106, Term #3

Q101, Base

Ql09, Coll.

Qll5, Base

Ql24, Coll.

Q201, Coll.

Q202, Base

Q202, Em.

Q204, Coll.

2.6 v

0.02

1.3 v v

0.04

1.3 v v

2.4 V (Visible distortion)

0.4 v

0.4

3.0 v v

30 TYPE 1568 WAVE ANALYZER

ClOG-----~-~!"--==

CI05

-------J

Cl33

SI02 --------.~~-~

207R (NOT

VISIBLE)

C I J g - - -

~b1---CI32

UTPUT AMPLIFIER

ETCHED BOARD

B502

B501

.,----CI30

POWER SUPPLY

,..__ _ _ _ ETCHED BOARD

~---R222

.L...-d ~--SI04

T501

S504

RI78-RI83

HUB ASSEMBLY

LOW 0

ETCHE:D BOARD

Figure 6-5. Access to components: interior view of the Type 1568 .

SERVICE AND MAINTENANCE 31

32

PARTS LIST

Ref . No.

De scription

Part No.

F e d. Mfg.

Cod e

Mfg. Part No.

CAPACITORS

C101

C102

Cll3

Cll4

Cll5

Plastic, 0,47 flF ±10

Electrolytic, 5 flF +100-10 % 50 V

Plastic, 0 ,

% 400 V

257 f1F ±0.25

%

Plastic, 0.0813 flF ±0,25

Plastic, 0.0257 flF ±0.25

100 V

%

%

100 V

100 V

4860-9725 84411 663F, 0.47 fl

F ±10 %

~450-3900 3 7942 2040595S9C10X3

C103

C104

Ceramic, 0.001 flF ±5 % 500 V

Electrolytic, 5 flF +100 -10 % 50 V

4405-2105

44503 900

72982 801, 0.001 flF ±5

37942 2040595S9C10 X 3

%

C105 Plastic (special), 2.57 flF ±0.25

% 150 V 4860-4901

84411 663UW, 2.57 flF ± 0.25

%

C106

Plastic (special), 0.813 flF ±0.25

% 150 V 4872-4812 24655 4872-481 2

C107

Plastic, 0,257 f1F ±0.25

% 100 V 4869-3257 24655 4869-

3 257

C108

Plastic, 0.0813 flF ±0,25 % 100 V

4868-2813 24655 4868-281 3

C109 Plastic, 0.0257 flF ±0.25

% 100 V

4868-2257 24655 4868-2257

CllO Plastic, 0.00813 flF ±0.25

% 25 V

4868-1257

24655 4868-1257

Cll1

Ceramic, 470 pF ±10 % 500 V

4404-2105 72982 831,470 pF ±10 %

Cll2 Ceramic, 470 pF ±10 % 500 V

4404-2105 72982 831, 470 pF ±10 %

4869-3257 24655 4869-3257

4868-2813

24655 4868-2813

4868-2257 24655 4868-2257

Cll6

C117

Plastic, 0.00813 f1F ±0,25

Plastic, 0,00255 f1F ±0.25

%

%

C118 Plastic, 775 pF ±0.5

% 25 V

C119

Trimmer, 5 pF to 25 pF

25 V

25 V

4868-1813 24655 4868-1813

4868-1255 24655 4868-1255

4868-0775

4910-H50

24655 4868-0775

72982

557~051, U2PO

Dl ODES

CR107

Zener, 15-V, ±5 % Type 1N965B, selected for low noise

CR205

Rectifier, Type 1 N645

CR206 Rectifier, Type 1 N 645

6083-1047

6082-1016

6082-1016

07910 1N965B

24446

24446

1N645

1N645

TRANSISTORS

Q101

Q102

Q103

Type 2N3390

Type 2N1131

Type 2N1131

Type 2N3390 Q104

Q105

Q106

Q107

Q108

Q109

Type 2N3250

Type 2N3250

Type 2N3390

Type 2N3250

Type 2N3250

Q110 thru

Type 2N3416

Q112

8 210-1077

8210-1047

24454 2N3390

8210-1025 96214 2N1131

8210-1025 96214 2Nll31

8210-1077 24454 2N3390

8210-1089 80211 2N3250

8210-1089 80211 2N3250

8210-1077 24454 2N3390

8210-1089 80211 2N3250

8210-1089 80211 2N3250

24446 2N3416

RESISTORS

R101

R102

R103

R104

R105

R106

R107

R108

R109

Film, 31.6

Film, 67.3

Film, 213

Film, 698 n

±1 % 1/8 n

±1 % 1/8 n

±1 % 1/8 n

±1/8 W

Film, 2.29 kn

±1 % 1/8

Film, 7.68

Film, 35.2 kn

±1 % 1/8 kn

±1 % 1/2

Film, 54.2

Film, 14 kn

±1 % 1/2 kn

±1 % 1/8

R110 Composition, 11 w w w w w w w w kn

±5 % 1/2 W w w w w

6250-9316 75042

CEA, 31.6

6250-9673 75042 CEA, 67.3

6250-0213 75042 CEA, 213

6250-0698 75042

CEA, 698

6250-1229 75042 CEA, 2.29

6250-1768 75042 CEA, 7,68

6450-2352

75042 CEC, 35,2

6450-2542 75042 CEC, 54.2

6250-2140 75042 CEA, 14 n

±1 % n

±1 % n

±1 % n

±1 % kn

±1 % kn

±1 % kn

±1 % kn

±1 % kn

±1 %

6100-3115 01121 RC20GF113J

R111

R112

R113

R114

R115

R116

R117

Potentiometer, composition

250 kn

±10 % CAL

Film, 124

Film, 249 kn

±1 % 1/4 kn

±1 % 1/8

Film, 11.1

Film, 46.4 kn

±1 % 1/8 kn

±1 % 1/8 W

Film, 89.8

Film, 68.1 kn

±1 % 1/4 kn

±1 % 1/4 W

Rll8

Composition, 360

Rll9 Composition, 180

R120

Composition, 4.7

R121

R122 Composition, 20

R123

R124

R125

R127

Composition, 56

Composition, 3.9

Composition, 5.1

Composition, 4.3 kn

±5 % 1/4 W kn kn

±5

±5

%

%

1/4 W

1/4 W kn

±5 % 1/4 W kn

±5 % 1/2 W kn

±5 % 1/4 W kn

±5 % 1/4 W kn

±5 % 1/4 W

6045-1061 01121 JT, 250 kn

±10 %

6350-3124 75042 CEB, 124

6250-3249 75042 CEA, 249 kn

±1 % kn

±1 %

6250-2111

75042 CEA, 11.1

625U-2464 75042 CEA, 46.4

6350-2898 75042 CEB, 89.8

6350-2681 75042 CEB, 68.1

6099-4365 75042 BTS, 360

6099-4185 75042 BTS, 180

6099-2475

75042 BTS, 4, 7

6099-3565

75042 BTS, 56 kn

±1 % kn

±1 % kn

±1 % kn

±1 % kn

±5 % kn

±5 % kn

±5 % kn

±5 %

6100-3205 01121 RC20GF203J

6099-2395

75042 BTS, 3.9 kn

±5 %

6099-2515 75042 BTS, 5,1

6099-2435 75042 BTS, 4.3 kn

±5 % kn

±5 %

R126

Potentiometer, wire-wound, 200

Precision, (special) 2,87 n

±5 % 6053-1205 75042 CT-106, 200 n

±5 % kn

±0.25

% 6690-6254 24655 6690-6254

Fed. Stock Number

5910-448-5527

5910-448-5527

5961-877-6192

5961-944-8222

5961-944-8222

5961-081-8365

5961-081-8365

5961-945-4108

5961-945-4108

5961-Q45-4108

5961-945-4108

5961-989-2749

5905-721-0292

5905-824-8535

5905-978-8817

5905-279-2667

5905-722-0915

5905-702-9574

5905-702-1771

5905-581-7564

5905-686-9998

5905-800-0179

5905-192-0649

PARTS LIST

(cont)

Part No.

Fed. A1fg.

Code Ref No. /)escription Mfg. Part No. Fed. Stock Number

RESISTORS ( con t)

Rl28A Potentiometer , wire -wound*

R128B

7 .

2 kQ

Rl28C Potentiometer, wire -wound*

R128D

7 .

2 kQ

Rl29 Precision, (special) 5 .

11 kQ

±0 .

25%

R

R l

1

30

31

Rl32

Precision

Composi t

, (specia ion

Composition

,

,

56

100 l ) 464 kQ

Q

± 5

±5

%

%

Q

±0 , 25 %

0975 4310 24655 0975 4310

6690 6286 24655 6690 6286

6690 6226 24655 6690-6226

6099 3565

75042

BTS, 56 kQ

±5 %

6099 1105 75042 BTS , 100

Q

±5 %

Rl33 Composition , 3 .

9 kQ

±5 %

Rl34

6099 2395 75042 BTS , 3,9 kQ

±5 % thru Potentiometer , wire wound 50

Q

±5 % 6058 0505 75042 C T -100 , 50

Q

±5 %

Rl39

R140 Potentiometer, wire wound 200

Q

±5 % 6053 1205 75042 CT 106 2, 200

Q

±5 %

Rl41 P recision , (specia l ) 2 .

87 kQ

±0 .

25 % 6690 6254 24655 6690 6254

Rl42 Composition , 56 kQ

±5 % 1/4 W

R143

Compos i tion, 1 00

Q

±5 % 1/4 W

Rl44 Composition , 3 .

9 kQ

±5 % 1/4 W

Rl45 Composition , 1 kQ

±5 % 1/4 W

6099 3565 75042 BTS , 56 kQ

±5 %

6099 -11 05 75042 BTS, 100

Q

±5 %

6099 2395 75042 BTS, 3 .

9 kQ

±5 %

6099-2 1 05 75042 BTS , 1 kQ

±5 %

Rl46 Composition , 5 1 0

Q

±5 % 1/4 W

R 1 47 Compos i tion , 5 .

1 kQ

±5 % 1 /4 W

R l 48

R l 49

R l 50

Composition

Composit

Film, 9 .

i on, 200 HI ±5

09

, kQ

39

±1 kQ

%

±5 % 1/4 W

%

1/8 W

1/4 W

Rl51

Rl52

Rl53

Film, 68 .1 kQ

±1 % 1 /4 W

Film, 33 .

2 kQ

±1 % 1 /8 W

Film, 3.74 kQ

±1 % 1 /8 W

Rl54

Composition, 300 kQ

±5 % 1 /4 W

Rl55 Compos i tion, 1 50 kQ

±5 % 1/4 W

Rl56 Composition , 56 kQ

±5 % 1/4 W

Rl58 Composition, 3 .

9 kQ

±5 % 1/4 W

Rl59 Composition , 4.7 kQ

±5 % 1/4 W

6099

6099

-

-

1515

25 1 5

75042

750 4

BTS , 5

2 BTS, 5 .

1 0

1

Q kQ

±5

±5

%

%

6099 3395 75042 BTS, 39 kQ

±5 %

6099 4205 75042 BTS, 200 kQ

±5 %

6250 -1 909 75042 CEA , 9 .

09 kQ

± 1 %

6350 268 1

75042 CEB , 68 .1 kQ

±1 %

6250 2332 75042 CEA , 33 .

2 kQ

± 1 %

6250 -1 374 75042 CEA , 3 .

74 kQ

± 1 o/n

6099 4305 75042 BTS, 30 0 kQ

±5 %

6099 4 1 55 75042 BTS, 150 kQ

±5 %

6099 3565

75042 BTS , 56 kQ

±5 %

6099

6099 -

2395

2475

75042

75042

BTS, 3

BTS, 4 .

.

9

7 kQ kQ

±5

±5

%

%

SWITCHES

SlOl

S102

Sl03

Sl04

Sl05

Rotary, 8 position MAX INPUT ,

METER RANGE

Rotary , 7 -position METER RANGE part of SlOl

Rotary, 6 position FREQUENCY

MULT I PLIER

Rotary, 6 position FUNCTION

Switch Board Assembly

SOCKETS

S010 1 8 Connector,

S0102 6 Connector ,

S0106 3 -Connector , female INPUT

7890

7890

7890

7890

1564

4230

-

-

-

-

-1

-

4020

4020

4030

4040

710

2708

24655

24655

2 4 655 7890

24655 7890-4040

24655

95354

7890

7890

1 564

-

-

-

-

4020

4020

4030

1710

CD608SF

4230 2706 95354 CD606SF

4230 2696 71468

XLR 3 -1

MISCELLANEOUS

]101 JACK, Telephone INPUT 4260 -1 500 82389 2] 1503

5905 800-0179

5905 800 0 1 79

5905 68 16462

5905 801 8272

5905 279 4623

5905 686 3358

5905 68 18821

5905 6 5 5 3 1 67

5905 58 17564

5905

5905 68 18854

5905 686 9995

5905

5905

5935

-

-

-

-

68 1-

800

686

636

-

-

8758

0

-9

1 79

998

5923

33

FEDERAL MANUFACTURERS CODE

From Federal Supply Code for Manufacturers Cataloging Handbooks H .... l

(Name to Code) and H•2 {Code to Nome) as supplemented through June, 1967 .

02606

02660

02768

03508

15605

16037

19644

19701

21335

24446

24454

24455

24655

26806

28520

28959

30874

32001

35929

12672

12697

12954

13327

14433

14655

14674

14936

15238

Code

00192

00194

00656

01009

01121

01295

02114

03636

03888

03911

04009

04713

05170

05624

05820

07127

07261

07263

07387

07595

07828

07829

07910

07983

07999

08730

09213

09408

09823

09922

11236

115Y9

12498

37942

38443

40931

42190

42498

43991

49671

49956

Manufacturers Nome and Address Code

Manufacturers Nome and Address

Code

Jones Mfg. Co., Chicago, Illinois 53021 Sangamo Electric Co., Springfield, Ill. 62705

Walsco Electronics Corp., Los Angeles, Calif. 54294 Shallcross Mfg. Co., Selma, N. C.

Aerovox Corp., New Bedford, Mass.

Alden Products Co., Brockton, Mass.

54715

Shure Brothers, Inc., Evanston, Ill.

56289 Sprague Electric Co., N. Adams, Mass.

Allen-Bradley, Co., Milwaukee, Wise.

Texas Instruments, Inc., Dallas, Texas

Ferroxcube Corp. of America,

Saugerties, N. Y. 12477

Fenwai

Lab. lnc., Morton Grove, Ill.

Amphenol Electronics Corp., Broadview, Ill.

Fastex Division of Ill. Tool Works,

Des Plaines, Ill. 60016

G. E. Semiconductor Products Dept.,

59730 Thomas and Betts Co., Elizabeth, N. J. 07207

59875 TRW lnc. (Accessories Div), Cleveland, Ohio

60399

61864

Torrington Mfg. Co., Torrington, Conn.

61637 Union Carbide Corp., New York, N. Y. 10017

United-Carr Fastener Corp., Boston, Mass.

63060

Victoreen Instrument Co., Inc.,

Cleveland, Ohio

83033

80431

80583

80740

81073

81143

81349

81350

81751

81831

63743 Ward Leonard Electric Co., Mt. Vernon, N. Y . 81860

Syracuse, N. Y. 13201

Grayburne, Yonkers, N. Y. 10701

Pyrofiim Resistor Co., Cedar Knolls, N.J.

Clairex Corp., New York, N. Y. 10001

Arrow, Hart and Hegeman Electric Co.,

Hartford, Conn. 06106

Motorola Semi -Conduct Product,

Phoenix, Ariz. 85008

Engineered Electronics Co., Inc.,

Saljta Ana, Calif. 92702

Barber-Colman Co., Rockford, Ill. 61101

Wakefield Eng., lnc., Wakefield, Mass. 01880

Eagle Signal Div. of E. W. Bliss Co.,

Baraboo, Wise.

Avnet Corp., Culver City, Calif. 90230

Fairchild Camera and Instrument Corp.,

Mountain View, Calif.

Birtcher Corp., No. Los Angeles, Calif.

65083 Westinghouse (Lamp Div), Bloomfield, N. J.

65092

Weston Instruments, Weston-Newark,

70485

Newark, N.

J.

Atlantic-lndia Rubber Works, lnc.,

Chicago, Ill. 60607

70563

Amperite Co., Union City, N.J. 07087

70903

Belden Mfg. Co., Chicago, Ill. 60644

71126

Bronson, Homer D., Co., Beacon Falls, Conn.

82219

82273

82389

82647

82807

71294 Canfield, H. 0. Co., Clifton Forge, Va. 24422

71744

Chicago Miniature Lamp Works, Chicago, Ill.

71785 Cinch Mfg. Co. and Howard B. Jones Div.,

83058

83186

71400

Bussman Mfg. Div. of McGraw Edison Co.,

St. Louis, Mo.

71707 Coto Coil Co. lnc., Providence, R. I.

83361

71590 Centralab, lnc., Milwaukee, Wise. 53212

83587

71666

Continental Carbon Co., lnc., New York, N.Y.

83740

84411

84835

Chicago, Ill. 60624

71823

Darnell Corp., Ltd., Downey, Calif. 90241

72136 Electro Motive Mfg. Co., Willmington, Conn.

84971

86577

American Semiconductor Corp., Arlington

Heights, Ill. 60004

Bodine Corp., Bridgeport, Conn. 06605

State Labs lnc., N. Y., N.Y. 10003

Amphenol Corp., Borg lnst. Div.,

Delavan, Wise. 53115

72259 Nytronics lnc., Berkeley Heights, N.J. 07922

72619

Dialight Co., Brooklyn, N. Y. 11237

72699 General Instrument Corp., Capacitor Div .,

Newark, N. J. 07104 Bodine Electric Co., Chicago, Ill. 60618

Continental Device Corp., Hawthorne, Calif.

72765 Drake Mfg. Co., Chicago, Ill. 60656

72825

Hugh H. Eby, lnc., Philadelphia, Penn. 19144

72962

Elastic Stop Nut Corp., Union, N.J. 07083

72982

Erie Teclmological Products lnc., Erie, Penn.

73l.J8 Beckman, lnc., Fullerton, Calif. 92o34 Vemaline Prod. Co., Franklin Lakes, N.J.

General Electric Semiconductor, Buffalo, N. Y.

73445

Amperex E.lectronics Co., Hicksville, N. Y.

Star-Tronics Inc., Georgetown, Mass. 01830

73559

Carling Electric Co., W. Hartford, Conn.

Burgess Battery Co., Freeport, Ill.

Burndy Corp., Norwalk, Conn. 06852

C.P.S. of Berne, lnc., Berne, lnd. 46711

73690

Elco Resistor Co., New Yonc, N.Y.

73899

J. F. D. Electronics Corp., Brooklyn, N.Y.

74193

Heinemann Electric Co., Trenton, N.J.

Dl.andler Evans Corp., W. Hartford, Conn.

Teledyn lnc., Crystalonics Div.,

Cambridge, Mass. 02140

RCA Commercial Receiving Tube and Semi-

74861

74970

75042

75382

Industrial Condenser Corp., Chicago, lll.

E. F. Jolmson Co., Waseca, Minn. 56093

IRC lnc., Philadelphia, Penn. 19108

Kulka Electric Corp., Mt. Vernon, N. Y.

86684

8nRno

88140

88219

88419

88627

89482

89665

90201

90750

90952

91032

91146

91293

91598

conductor Div., Woodridge, N.J.

75491

Lafayette Industrial Electronics , Jamaica, N.Y.

91637

Clarostat Mfg. Co. lnc., Dover, N .

• 75608

Linden and Co., Providence, R. I.

91662

91719

91929

92519

Dickson Electronics Corp., Scottsdale, Ariz.

Solitron Devices, Tappan, N. Y. 10983

ITT Semiconductors, W. Palm Beach, ¥lorida

Cornell Dubilier Electric Co., Newark N.J.

Corning Glass Works, Corning, N. Y.

General Instrument Corp., Hicksville, N. Y.

ITT, Semiconductor Div. of Int. T. and T,

Lawrence, Mass.

Cutler-Hammer lnc., Milwaukee, Wise. 53233

Spruce Pine Mica Co., Spruce Pine, N. C.

75915

76005

76149

76487

Littelfuse, lnc., Des Plaines, Ill. 60016

Lord Mfg. Co., Erie, Penn. 16512

Malloy Electric Corp., Detroit, Mich. 48204

James Millen Mfg. Co., Malden,Mass. 02148

76545 Mueller Electric Co., Cleveland, Ohio 44114

76684 National Tube Co., Pittsburg, Penn.

76854

77147

Oak Mfg. Co., Crystal Lake, Ill.

Patton MacGuyer Co., Providence, R.

I.

77166

Pass-Seymour, Syracuse, N. Y.

77263 Pierce Roberts Rubber Co., Trenton, N.J.

LRC Electronics, Horseheads, New York

77339

Positive Lockwasher Co., Newark , N.J.

Electra Mfg. Co., lndependence, Kansas 67301 77542

Ray-0-Vac Co., Madison, Wise.

92678

93332

93916

94144

94154

95076

Fafnir Bearing Co., New Briton, Conn.

G. E. Schenectady, N. Y. 12305

G. E., Electronic Comp., Syracuse, N. Y.

G. E. (Lamp Div), Nela Park, Cleveland, Ohio

General Radio Co., W. Concord, Mass 01781

American Zettler Inc .

, Costa Mesa, Calif.

Hayman Mfg. Co., Kenilworth, N.J.

Hoffman Electronics Corp., El Monte, Calif.

77630

77638

78189

78277

TRW, Electronic Component Div.,

Camden, N. J. 08103

General Instruments Corp., Brooklyn, N. Y.

Shakeproof Div. of Ill. Tool Works,

Elgin, Ill. 60120

Sigma fustruments Inc., S. Braintree, Mass.

78488 StackPole Carbon Co., St. Marys, Penn.

78553 Tinnerman Products, Inc., Cleveland, Ohio

95146

95238

95275

95354

95412

95794

96095

96214

96256

International Business Machines, Armonk, N.Y.

79089 RCA, Commercial Receiving Tube and Semi-

Jensen Mfg. Co., Chicago, Ill. 60638

Constanta Co. of Canada Limited,

Montreal 19, Quebec

conductor Div., Harrison, N.J.

79725

Wiremold Co., Hartford, Conn. 06110

79963

Zierick Mfg. Co., New Rochelle, N. Y.

P. R. Mallory and Co. lnc., lndianapolis, lnd.

Marlin-Rockwell Corp., Jamestown, N.Y.

Honeywell lnc., Minneapolis, Minn. 55408

Muter Co., Chicago, Ill. 60638

National Co. lnc., Melrose, Mass. 02176

80030

Prestole Fastener Div. Bishop and Babcock

Corp., Toledo, Ohio

80048 Vickers lnc. Electric Prod. Div.,

St. Louis, Mo.

80131

Electronic Industries Assoc., Washington, D.C.

96341

96791

96906

97966

Nonna-Hoffman Bearings Corp.,

Staniord, Conn. 06904

RCA, New York, N. Y.

Raytheon Mfg. Co., Waltham, Mass. 02154

80183

80211

80258

80294

Sprague Products Co., N. Adams, Mass.

Motorola lnc., Franklin Park, Ill. 60131

Standard Oil Co., Lafeyette, lnd.

Bourns lnc., Riverside, Calif. 92506

98291

98821

99180

99378

99800

Manufacturers Name and Address

Meissner Mfg., Div. of Maguirt Industries, Inc.

Mount Carmel, illinois

Air Filter Corp., Milwaukee, Wise. 53218

Hammarhmd Co. lnc., New York, N. Y.

Beckman lnstruments, lnc., Fullerton, Calif.

Graybill lnc., LaGrange, Ill. 60525 lsolantite Mfg. Corp., Stirling, N.J. 07980

Military Specifications

Joint Army-Navy Specifications

Colwnbus Electronics Corp., Yonkers, N.Y.

Filton Co., Flushing, L. I., N. Y

Barry Controls Div. of Barry Wright Corp.,

Watertown, Mass.

Sylvania Electric Products, .

lnc., (Electronic

Tube Div.), Emporium, Penn. lndlana Pattern and Model Works, LaPort, lnd.

Switchcraft lnc., Chicago, Ill. 60630

Metals and Controls lnc., Attleboro, Mass.

Milwaukee Resistor Co., Milwaukee, Wise.

Carr Fastener Co., Cambridge, Mass.

Victory Engineering Corp (IVECO),

Springfield, N.J. 07081

Bearing Specialty Co., San Francisco, Calif.

Solar Electric Corp., Warren, Penn.

Union Carbide Corp., New York, N. Y. 10017

TRW Capacitor Div., Ogallala, Nebr.

Lehigh Metal Products Corp.,

Cambridge, Mass. 02140

TA Mfg. Corp., Los Angeles, Calif.

Precision Metal Products of Malden lnc.,

Stoneham, Mass. 02180

RCA (Electrical Component and Devices)

Harrison. N.J.

Continental Electronics Corp.

Brooklyn, N.Y. 11222

Cutler-Hammer Inc., Lincoln, lli..

Gould Nat. Batteries lnc., Trenton, N.J.

Cornell Dubilier Electric Corp.,

Fuquay-Varina, N. C.

K and G Mfg. Co., New York, N. Y.

Holtzer Cabot Corp., Boston, Mass.

United Transformer Co., Chicago, Ill.

Mallory Capacitor Co., lndianapolis, lnd.

Westinghouse Electric Corp., Boston, Mass.

Hardware Products Co., Reading, Penn. 19602

Continental Wire Corp., York, Penn. 17405

ITT Cannon Electric lnc., Salem, Mass.

Johanson Mfg. Co., Boonton, N.J. 07005

Chandler Co., Wethersfield, Conn. 06109

Dale Electronics Inc., Columbus, Nebr.

Elco Corp., Willow Grove, Penn.

General Instruments, Inc., Dallas, Texas

Honeywell lnc., Freeport, Ill.

Electra fusulation Corp., Woodside,

Long Island, N.Y.

Edgerton, Gennesbausen and Grier,

Boston, Mass.

Sylvania Electric Products, Inc.,

Woburn, Mass.

Cramer Products Co., New York, N. Y. 10013

Raytheon Co. Components Div., Quincy, Mass.

Tung Sol Electric lnc., Newark, N. J.

Garde Mfg. Co., Cumberland, R.I.

Alco Electronics Mfg. Co., Lawrence, Mass.

Continental Connector Corp., Woodside, N. Y.

Vitramon, Inc., Bridgeport, CoM.

Methode Mfg. Co., Chicago, Ill.

General Electric Co., Schenectady, N. Y.

Anaconda American Brass Co.,

Torrington, Conn.

Hi-Q Div. of Aerovox Corp., Orlean, N.Y.

Texas lnstruments lnc., Dallas, Texas 75209

Thordarson-Meissner Div. of McGuire,

Mt. Carmel, Ill.

Microwave Associates Inc., Burlington, Mass.

Amphenoe Corp. Jonesviiie, Wise. 53545

Military Standards

CBS Electronics Div. of Columbis Broadcast-

ing Systems, Danvers, Mass.

Sealectro Corp., Mamaroneck. N. Y. 10544

North Hills Electronics lnc., Glen Cove, N. Y.

Transitron Electronics Corp., Melrose, Mass.

Atlee Co:r:p., Winchester, Mass. 01890

Delevan Electronics Corp., E. Aurora, N. Y.

5/68

34

Figure 6.0. High

Q circuit etched-board assembly (P / N 1568-2700).

Figure 6-7. Etched-board assembly (P / N 1568-2720).

NOTE : The number appearing on an etched board is the number of the board only, without circuit compo · nents . When order i ng a new etched board assembly , use the part number listed in the figure caption

A dot near a transistor on the etched board assembly indicates the collector of that transistor .

INPUT

IOOKfi

50106

113F

TO

·~~~~~=B=L-.S/04

S0105,C3

205F

11 4F

115F

I

-=

C505

!OOpF

S/04

IOBR

105R

109R

S/01

C/01

0.47

S/04

102F

R /02

67.3

1/B W

R /0 3

213

1/B W

R/04

698

1/B W

RIO!

31.

6

1/B W

R/05

2.29K

-

I/8 W

R/06

7.68K

.

I/8 W

Jt!K

4-

I/2 W

102F

/03 F

R/08

54.2K

I/2W

103R 105R

10 4R

!18F 115F

5102

116 F

117F

105R 102R

R//0

Il K

!/2W

107R

)

S/02

R/16 Rl/7

89.8K 68./K

R/24

5./K

TO

S/04

205F

BL

,-------<.-----..

SOIOI,C3

R/25

4.3K

-:-

106F

S/04

S/04

LEGENO

e o FF

• FAST

• SLOW ecAL ecHECK BAT ecHARGE

R /09

!

4K

I/ 8W

R//2

124K

CABLE

YE'

103R

104R

Rill

250K

n

Rl/4

11./K

1/BW

CAB L E GN

R/15

4 6.4K

1/BW r

,_,

SOlO/

AI

Rl/8

36 Cl

SOlO/

82

209R

...

e

"' S0105 , F6

C209

16

R219 R220

C~~LE'

+--~2,;,0 1\0,K_--<>-"20'V'rK _,'-f '-',_lr> T-e

210 R

S/04

R221

47K

5101

LEGEND

BAND LEVEL

REAR OIAL

300mV

IOOmV

30mV

IOmV

3mV

• lmV

300~V

IOO~V

BOTH DIALS IN

COUNTERCLOCKWISE

POSITION

CR206

R 223

3K

CR205

Cl42

10

50102

AI

C/05 2.57 F

6 07F

612F

.

e

C/061

60/F

S/03

0.813

~

602F

e

C/08~~-0813

603F

+

e

C/091

60 4F

+

.0257

606F

Rl3/

56K

R/30

464

Rl29

5.1/K

50102

0 4

407R

5103

50102

F6

Rotary switch sections are shown as viewed from the panel end of the shaft. The first digit of the contact number refers ta the section. The section nearest the panel is 1, the next section back is 2, etc. The next two digits refer to the contact. Contact 01 is the first position clockwise from a strut screw (usu· ally the screw above the locating key), and the other contacts are numbered sequentially (02, 03, 04, etc), proceeding clockwise around the section. A suffix

F orR indicates that the contact is on the front or rear of the section, respectively.

BOTTOM VIEW

BAS£

<MocoLL <[email protected]

s<

COLL

0102,103,105,

106,108,109

0/01,/04,107,

/10, 111,112

I

NOTE UNLESS SP ECIFIED

POSITION OF ROTARY SWITCHES

SHOWN COUNTERCLOCKWISE

5 RESISTANCE IN OHMS

IK 1000 OHMS M 1 MEGOHM

2

~~;~:~~1~~B;~~NA~f[E S~ I ~~:ES

SUPPLIED IN INSTRUCTION BOOK

3 REFER TO SERVICE NOTES IN INSTRUC·

TION BOOK FOR VOLTAGES

APPEARING ON DIAGRAM

6 CAPACITANCE VALUES ONE AND

OVER IN PICOFARADS. LESS

THAN ONE IN MICROFARADS

0

KNOB CONTROL

0

SCREWDRIVER CONTROL

9 AT ANCHOR TERMINAL

4 RESISTORS 1/4 WATT

10 TP TEST POINT

FUNCT I ON

SLO ~

;AL

• CHECK BAT e CHARGE

FREQUENCY MULTIPliER

1 0 .

10~ ~00

.

ooo e iOOO

8

50102

AI

C/05 2.57 F

6 0TF 612F

. e

CI061

60/F

Sl03

0.813

~

602F

0.257

~

603F

.0813

~

604F

+

.

0257

~

605F

+

.00813

606F 50102

82

Rl31

56K

CABLE RO

v

5102

2071>

209F

215F

TO INPUT

LO 0 SEC

5102

I/8W

+

R l45

I K

Cl 2 0

5p F

SOlO!

F 6

OliO

Rl53

3.7

4K

I/8 W

205R

Rl30

464

Rl 29

5 .

1/K

50102

0 4

itch sections are shown as viewed from the of the shaft. The first digit of the contact fers to the section. The section nearest is 1, the next sectio n back is 2, etc. The igits refer to the contact . Contact 01 is sition clockwise from a strut screw (usurew above the locating key), and the other renumbered sequent i ally (02, 03, 04, etc) , g clockwise around t he section. A suffix icates that the contact i s on the front or e section, respectively .

SI03

4 0/R CW

Rl 3 5

50

Rl36

50

R/ 3 7

5 0

Rl38

50

Rl3 9

50

50102

F6

4 06R

S/03

LEGEND

• o O

10

100

100

1000

1000

S/ 03

LT I PLIER

100 e iOOO

,RI47

5~':2

15./K

; \

F

~~

~

.

~\ \ ~ I f l t;.

-~

-~

~/

0

f I \

-iolo~

' 0

'.Ji

0

1/ 0F'._.

R/ 4 6

1510

R l 4 9

200K

S/02

LEGEND

BAND LEVEL

FRONT DIAL

3 00 m V

IV

3V

IOV

30V

I OOV

300V

BOTH DIALS I N

COUNT ER CLOC KW ISE

POSITION

Figure 6· 8. High

Q

and input circuits schematic diagram.

35

PARTS LIST

Re[. No.

Description

Part No.

Fed.

Mfg.

Code

M[c:

Part No.

Fed. Stock Number

CAPACITORS

C120

C121

C122

C123

Electrolytic, 5 flF +100 -10 % 50 V

Electrolytic, 5 IJF +100 -10 % 50 V

Ceramic, 0.001 flF ±5% 500 V

Electrolytic, 5 flF +100 -10 % 50 V

C124 Plastic, 0.257 flF ±0.25

% 100 V

C125 Plastic, 0.0813 flF ±0,25% 100 V

C126 Plastic, 0.0257 flF ±0;25 % 100 V

C127 Plastic, 0.00813 flF ±0.25

% 25 V

C128 Plastic, 0,00255 flF ±0.25

% 25 V

C129

C130

Plastic, 775 pF ±0.5

% 25 V

Trimmer, 5 pF to 25 pF

4450-3900 37942 2040595S9C10X3

4450-3900

37942 2040595S9C10X3

4405-2105 72982

801, 0.001 flF ±5 %

4450-3900 37942 2040595S9C10X3

4869-3257 24655 4869-3257

4868-2813 24655 4868-2813

4868-2257 24655 4868-2257

4868-1813 24655 4868-1813

4868-1255

4868-0775

4910-1150

24655 4868-1255

24655 4868-0775

72982 557-051, U2PO

5910-448-5527

5910-448-5527

5910-448-5527

C131

C132

Ceramic, 470 pF ±10 % 500 V 4404-1478 72982 831, 470 pF ±10%

Plastic (special) 2.57 flF ±0.25

% 150 V 4860-4901 84411 663UW, 2.57 flF ±0.25

%

C133

C134

Plastic (special) 0,813 flF ±0.25

% 150 V 4872-4812 24655 4872-4812

Plastic, 0.257 flF ±0,25 % 100 V

4869-3257 24655 4869-3257

C135

C136

Plastic, 0.0813 flF ±0.25

% 100 V

Plastic, 0.0257 flF ±0.25% 100 V

4868-2813 24655 4868-2813

4868-2257

24655 4868-2257

C137 Plastic, 0.00813 flF ±0.25

% 25 V

4868-1813 24655 4868-1813

C138

C139

Electrolytic, 22 flF ±20 % 15 V

Electrolytic, 5 flF +100 -10 % 50 V

4450-5300

56289 1500226X0015B2

4450-3900 37942 2040595S9C10X3

C141 Electrolytic, 15 flF ±20 % 20 V

C142

C143

C201

C202

C203

C204

C205

C206

C207

C208

Mica, 10 pF ±10 % 500 V

Ceramic, 470 pF ±10 % 500 V

Electrolytic, 200 flF +100 -10

Electrolytic, 5 flF +100 -10

Electrolytic, 5 flF +100 -10

Electrolytic, 120 flF ±20 %

Electrolytic, 5 flF +100 -10

Electrolytic, 5 flF +100 -10

Electrolytic, 5 flF +100 -10

%

%

%

50 V

50 V

10 V

%

Electrolytic, 40 flF +100 -10

%

%

6 V

50 V

% 6 V

50 V

50 V

5910-752-4270

5910-448-5527

4450-5200 56289 1500156X0020B2 5910-855-6335

4620-0lOU

72136 CM15, 10 pF ±10 %

4404-1478 72982 831, 470 pF ±10 %

4450-2610

37942 TT, 200 flF +100 -10 % 5910-945-1836

4450-3900 37942 2040595S9C10X3 5910-448-5527

5910-448-5527 4450-3900 37942 2040595S9C10X3

4450-5616

56289 1500127X0010R2

4450-3900 37942 2040595S9C10X3 5910-448-5527

5910-952-0467 4450-3600 37942 20-40707S4

4450-3900

37942 2040595S9C10X3

4450-3900 37942 2040595S9C10X3

5910-448-5527

5910-448-5527

C209

C211

Mica, 16 pF ±5 % 500 V

Plastic, 0,0082 flF ±5 % 200 V

4700-0210 14655 22ASQ16JC

4860-7520 84411 663UW, 0.0082 flF ±5%

DIODES

CR109 Zener, 15 V, ±5 % Type 1N965B

CR111 Zener, 10 V, Type 1N758A

CR201 thru High-speed, Type 1N191

CR204

TRANSISTORS

6083-1047

6083-1063

6082-1008

07910 1N965B

04713

1N758A

93916 1N191

Q113

Q114

Q115

Q116

Type 2N3416

Type 2N3416

Type 2N3390

Type 2N1131

Q117

Q118

Q121

Q122

Type 2N1131

Type 2N3390

Q119 Type 2N3250

Q120 Type 2N3250

Type 2N3416

Q123

Q124

Type 2N3390

Type 2N3250

Type 2N3250

Q201 thru Type 2N3416

Q204

8210-1047 24446 2N3416

8210-1047

24446 2N3416

8210-1077 24454 2N3390

8210-1025

96214 2N1131

8210-1025

8210-1077

8210-1089

8210-1089

8210-1047

8210-1077

8210-1089

8210-1089

8210-1047

96214 2Nll31

24454 2N3390

80211 2N3250

80211 2N3250

24446 2N3416

24454 2N3390

80211

80211

2N3250

2N3250

24446 2N3416

RESISTORS

R160

R161

R162

R163

Composition, 5,1 kQ ±5% 1/4 W

Composition, 4,3 kn ±5% 1/4 W

Precision, (special) 2,87 kn ±0,25%

6099-2515 75042 BTS, 5.1 kfl ±5%

6099-2435 75042 BTS, 4,3 kfl

6690-6254 24655 6690-6254

±5%

Potentiometer, wire-wound 200 n ±5% 6053-1205 75042 CT-106-2, 200 n

R164 Composition, 56 kn ±5% 1/4 W

R165

R166

R167

R168

Composition, 100

Composition, 39

Composition, 3.9

Composition, 5.1 n kn

±5% 1/4 W

±5% 1/4 W kn kQ

±5% 1/4 W

±5% 1/4 W

6099-3565 75042 BTS, 56 kfl ±5%

6099-1105 75042 BTS, 100 n ±5%

6099-3395 75042 BTS, 39 kfl ±5%

6099-2395 75042 BTS, 3.9 kfl ±5%

6099-2515 75042 BTS, 5.1 kfl ±5%

5961-877-6192

5961-296-3360

5961-989-2749

5961-989-2749

5961-081-8365

5961-081-8365

5961-945-4108

5961-945-4108

5961-989-2749

5961-945-4108

5961-945-4108

5961-989-2749

5905-279-4623

5905-800-0179

5905-686-3358

5905-279-4623

PARTS LIST

(cont)

R e f. No. D esc ripti o n Part N o.

F e d Mf g .

Co d e A!

fg . Part No .

RESISTORS

(cont)

R169 Composition, 510 n ±5 % 1/4 W

R170

R171

Composition, 5.1 kQ ±5 % 1/4 W

Precision, (special) 2,87 kQ ±0,25 %

6099-1515 75042 BTS, 510 Q ± 5 %

6099-2515 75042 BTS, 5.1 kQ ±5 %

6690-6254 24655 6690-6254

R172

Potentiometer, wire-wound 200 Q ± 5 %

6053-1205 75042 CT-106-2, 200 Q

R173 Precision, (special) 5.11 kQ ±0.25

% 6690-6286 24655 6690-62 8 6

R174 Precision, (special) 464 Q ±0,25 %

R175 Composition, 56 kQ ±5 % 1/4 W

6690-6226

6099-3565

24655 6 6 90-6226

75042 BTS, 56 kQ ±5 %

R215

R216

R217

R218

R219

R220

R221

R222

R176

R177

Composition, 100 n ±5

Composition, 3.9 kQ ±5

% 1/4 W

% 1/4 W

6099-1105 75042 BTS, 100 Q ±5 %

6099-2395

75042 BTS, 3.9 kQ ±5

%

R178 thru Potentiometer, wire -wound 50 Q ±5 % 6058-0505 75042 CT-1oo, son ±5 %

R183

R184 Composition, 3 kQ ±5 % 1/4 W

R185 Composition, 200 kQ ±5 %

1/4 W

R186 Film, 14,7 kQ ±1 % 1/8 W

R187 Film, 21.5 kQ ±1 % 1/8 W

6099-2305

6099-4205

75042 BTS, 3 kQ ± 5 %

75042 BTS, 200 kQ ±5

6099-2205 75042 BTS, 2 :!en ±5 %

%

6250-2147 75042 CEA, 14.7 kQ ± 1 %

6250-2215 75042 CEA, 21.5 kQ ±1 %

R201 Composition, 2 kQ ±5 % 1/4 W

R202

Composition, 10 kQ ±5 % 1/4 W

R203 Composition, 2 kQ ±5 % 1/4 W

R204 Composition, 20 kQ ±5 % 1/4 W

R205 Composition, 4,3 kQ ±5 % 1/4 W

R206

R207

R208

Composition, 3.6 kQ ±5

Film, 30.1 kQ ±1 % 1/8 W

Composition, 47 kQ ±5

%

%

1/4 W

1/4 W

R209

R210

R211

R212

R213

R214

Composition, 4.7 kQ ±5 %

%

%

1/4 W

Composition, 24 kQ ±5 % 1/4 W

Composition, 1 kQ ±5 % 1/4 W

Composition, 1 kQ ±5 %

Composition, 100 kQ ±5

Composition, 27 kQ ±5

1/4 W

1/4 W

1/4 W

Composition, 6,2 kQ ±5 % 1/4 W

6099-3105

6099-2205

6099-3205

6099-2435

6099-2365

6250-2301

6099-3475

75042 BTS, 10 kQ ±5

75042

75042

BTS, 2 kQ ±5

75042 BTS, 20 kQ

75042 BTS, 47 kQ

±

± 5

%

%

5

75042 BTS, 4,3 kQ ±5

75042 BTS, 3.6 kQ ±5

%

%

CEA, 30,1 kQ ±1%

%

6099-2475 75042 BTS, 4. 7 kQ ±5 %

6099-3245 75042 BTS, 24 kQ ±5

%

6099-2105 75042 BTS, 1 kQ ±5 %

6099-2105 75042 BTS, 1 kQ ±5 %

%

6099-4105 75042 BTS, 100 kQ ±5 %

6099-3275

6099-2625

75042 BTS, 27 kQ ±5

75042 BTS, 6.2 kQ ±5

%

%

Composition, 16 kQ ±5

Composition, 1.8 kQ ±5

%

Composition, 200 kQ ±5

1/4 W

%

%

1/4 W

1/4 W

Composition, 200 kQ ±5 % 1/4 W

Composition, 20 kQ ±5 % 1/4 W

Composition, 47 kQ ±5 % 1/4 W

Potentiometer, composition

6099-3165

6099-2185

6099-4205

75042 BTS, 16 kQ ± 5

75042 BTS, 1,8 kQ ±5

%

75042 BTS, 200 kQ ±5

%

%

6099-4205 75042 BTS, 200 kQ ±5 %

6099-3205 75042

BTS, 20 kQ ±5 %

6099-3475 75042 BTS, 47 kQ ±5 %

6040-1000 01121

FWC, 100 kQ ±20 %

R223

R224

R226

100 kQ ±20 %

Composition, 3 kQ ± 5 % 1/4 W

Composition, 3 kQ ±5 % 1/4 W

Composition, 3,3 kQ ±5 % 1/4 W

6099-2305

6099-2305

6099-2335

75042 BTS, 3 kQ ±5

75042 BTS, 3 kQ ±5

%

%

75042 BTS, 3.3 kQ ±5 %

SOCKETS

S0103

S0104

SOlOS

6 -Connector,

8 -Connector,

8 -Connector,

MISCELLANEOUS

J201 JACK, Telephone OUTPUT

M201

METER, Panel, 100 fJA

4230-2706

95354 CD606SF

4230-2708 95354 CD608SF

4230-2708

95354 CD608SF

4260-1500

5730-1389

82389 2J-1503

40931 Meds 1389

Fed . S t oc k Number

5905-801-8272

5905-279-4623

5905-800-0179

5905-682-4097

5905-681-8821

5905-702-1143

5905-615-7339

5905-279-4629

5905-683-2238

5905-279-4629

5905-686 -3368

5905-577-0627

5905-702-1760

5905-683 -2246

5905-686-9998

5905-681-6462

5905-681-6462

5905-686-3129

5905-683-3838

5905-682 -4100

5905-688 -3 73 8

5905-681-8821

5905-681-8821

5905-686-3368

5905-683-2246

5905-958-7949

5905-682 -4097

5905-682-4097

5905-681-9969

5935-636-5923

Figure 6-9. Low

Q circuit etched-board assembly (P/N 1568-2760)

Figure 6-10. Output circuit etched-board assembly (P/N 1568-2770)

Figure 6-11. Etched-board assembly (P /N 1568-2730).

NOTE

The number shown on the foil side c part number for the complete assembl ber is given in the caption.

The dot on the foil at the transist1 collector lead.

Rotary switch sections are shown as viewed from the panel end of the shaft. The first digit of the contact number refers to the section. The section nearest the panel is 1, the next section back is 2 , etc . The next two digits refer to the contact. Contact 01 is the first position clockwise from a strut screw (usu· elly the screw above the locating key), and the other contacts are numbered sequentially (02, 03, 04, etc), proceeding clockwise around the section. A suff i x

F or R indicates that the contact is on the front or rear af the section, respectively .

\_/

Pft;f

4.3

K

50!04

C3

8L

S/04

205F

0114

TO

S102

215F

'i

CA;E

WH

~

;: I

S 0/:4-1~

A I

C/2/

5,uF

R/55

!50K

R/ 54 R /5 9

3 00 K 4 .7

K

3 0 /R

r--

S/02

R/87

2!

.5

K

1/B W

:Jil' F

J 1 6F

"Tct23

":b'

5,uF

0117

C/2 4

I

o.2

5 7

••

+

C/ 25 1/?R

----j~·OBI ~

+

':/26 10/R

SO! OJ

8? tOTR

--J h P 5 ':....e

+

C/27 !O?R

--7

1-:Qg§ f.Le

+

C/2 B 103R

1 + .0

0 25 5 .

C/2 9 !

04 R

77 5

S/03

!05

R

II O F

C/30

5·25

R/66 R

39K

3 .

• i

5./ K

C M

0116, 0117,

0119, 0120,

0123, 0 12 4

BOTTO M

E M ~

COLL

A S£

~

VIE W

0113, 011 4,

0115, 0 11 8 , 0 1 21

0 122 ,02 01 ,0 202

0 203,020 4

the board is not the

. The assembly num lr socket indicates the

* TO

(7

/

R/8 5

+-4'~--'

S0/04 \? S/05

H7

\

'-

/

"

~ JO~F

q ~

S/04

T O

R 506

S/04

3=1

NOT E UN L ESS S P ECIF I ED

I POSITION OF ROTARY SWITCHES

SHOWN COUNIERCLOCI<WISE

15

RESISTANCE IN OHMS

K 1000 OHMS

M

1 MEGOHM

CONTACT NUMBERING OF SWITCHES

EXPLAINED ON SEPARATE SHEET

SUPPLIED IN INSTRUCTION BOOK

3

~f6~R B6 ~:E;;~c~ON L ~~Li~N INSTRVC-~

APPEARING ON DIAGRAM

4 RESISTORS

1 , 4

WATT

6 CAPACITANCE VALUES ONE AND

OVER IN PICOFARADS. LESS

THAN ONE IN MICROfARADS

0

KNOB CO"ROL

0

SCREWOHIVfR CONIROL

9 AT ANCHOR TERMI\'AL

10 TP TEST POINT

LOW 0 SECTION

C A BLE GY

S/04

R/68

5./K

R2 02

/O K

R204

20K

C 203

5pF

R208

4TK

R / 74

464

S0 /0 3

F6

MIN

R/73

5.1

/ K

R209

4.TK

R2 1 5

6.2K

+

C 20T

5pF

R214

2TK

50105 CABLE

E5 ' i WH · VT ('

,_ p

OU TP UT

C206

40pF

R213 lOOK

S0/05

F6

c

CABU"

WH-RD

1

ro

S/04

209R

)

R2 1 6

/6K

R2/T

/ .

8K

R2 1 8

200K

Figure 6-12. Low Q and output circuits schematic diagram .

3 7

Figure 6-13. Power supply etched-board assembly (P/N 1568-2750).

TOP

C 118/C/2.9

775 PF

0

_ _ _j -

I

C//5

/Ct2~

.0257

L _ _ _

-cm/ct2-e

L..:

.00255

L_-+-==0J

I

L

I

L -

c/i4/CIZ5-

0813

-

.~

C//C,/C/27

• DO 813

~15si-o1~0/2-

- - -

J

_ J

1

ctoe/ct35

1

1

.0813

L _ _ _

_ j

L

cto<:J/cJfJCt> --,

.0257

_

_j

I

CI07/Gt:34-

.257

L - -

-

__ v_j

Figure 6-15. Capacitor stock etched-board assembly (P/N 1568-2780).

NOTE

The number shown on the foil side of the board is not the part number for the complete assembly. The assembly number is given in the caption.

The dot on the foil at the transistor socket indicates the collector lead .

RO

I 5

S504

RO

AT

515

2 6

GY

AT

516

BL MANUAL

CR50/

CR503

S502

LEGEND

MULTIPLIER

SWITCHING

AUTO

(AC ONLY)

CR504

T50/

AT

GN 505

5

CR506

CR505

6

_[

-=-

CR507

-=-

BL

AT

506

NC NO

R50/

5./K

GN

3W

AT

508

S503

YE

CR508

M050/

AT

517

+

R508

/OK

5W

WH-BK

AT

509

C501A R502

300pF lOOK

..:::::.

/W

MO

POWER SUPPLY SECTION

FOR I/5V OPERATION

CONNECT T50/,1 TV38 2T04

FOR 230V OPERATION

CONNECT T501,2 T03

CONNECT AT 508 TO AT517

R507

47

I/2W

AT 51!

-=-

R503

360

WH-BL

-=-

MANUAL

NOTE UNLESS SPECIFIED

1. POSITION OF ROTARY SWITCHES

SHOWN COUNTERCLOCKWISE.

S . RESISTANCE IN OHMS

K 1000 OHMS M 1 MEGOHM

2 . CONTACT NUMBERING OF SWITCHES

EXPLAINED ON SEPARATE SHEET

SUPPLIED IN INSTRUCTION BOOK .

3 . REFER TO SERVICE NOTES IN INSTRUC. 7 .

TION BOOK FOR VOLTAGES

APPEARING ON DIAGRAM .

6 CAPACITANCE VALUES ONE AND

OVER IN PICOFARADS . LESS

THAN ONE IN MICROFARADS .

8 .

0

KNOB CONTROL

0

SCREWDRIVER CONTROL

9 . AT ANCHOR TERMINAL

4 . RESISTORS 1 / 4 WATT .

10 . TP TEST POINT

CR505

CR507

R507

47

1/ZW

R503

360

R504

360

AT

R505

360

512

TO S/04, 3 !OF

R506

ZBTK

+

C504

I

50pF

+

=

1 f

8501 l

AT

-518

YE

WH-GN

1/BW

... t----~.-------1~'--.-::==----•

TO 17. 6V MIN

206F 205F

S0/05, C3

S/04

AT 51!

208F

P50!

~~~

r-. 2otF

o

To

4

/

o_...~

0 \ v-;.,

11-1 \

''Y

0

-<

l

>

207F

\_/

Rotary switch sections ore shown as viewed from the pone I end of the shaft . The first digit of the contact number refers to the section. The section nearest the panel is 1, the next section back is 2, etc. The next two digits refer to the contact. Contact 01 is the first position clockwise from a strut screw {usu· oily the screw above the locating key), and the other contacts ore numbered sequentially (02, 03,

04,

etc), proceeding clockwise around the section. A suffix

F or R indicates that the contact is on the front or rear of the section, respectively.

Figure 6-14. Power supply schematic diagram.

39

SLIDE

SLIDE WASHER

--r---10

STUD

MOUNTING PLATE

(INSTRUCTION

PLATE)

STUD

WASHER

HANDLE

Complete cabinet assembly (P/N 1568-2110).

MOUNTING PLATE

(NAME PLATE)

1650B-16

Name GR Part No Name

GR Part No

Name GR Part No

Name ~R

Part No.

Cabinet

Spacer

Pivot Stud

Screw*

4182-8080 Cover Assembly 4170-2071

4170-0700 Nut Plate

4170-1350

4170-1000 Screw

7040-0400 Washer

Handle Assembly 5361-2000

7080-1000

8040-2400

*Tighten 1/4- 28 screws to 45-55 in. lbs torque.

**Bend mounting plate to give 1/32 to 1/16 spacing, both sides.

Mounting Plate**

{Instruction Plate)

Stud

Slide

Handle

7860-5800

Mounting Plate* 7864-8220

{Name Plate)

4170-1100 Washer

4170-1270 Slide Washer

8140-0105

4170-7030

5360-1013

COVER ASSEMBLY

CABINET

SPACER

PIVOT

STUD

SCREW

NUT PLATE

SCREW AND

WASHER

HANDLE ASSEMBLY

Complete handle and mounting plate assembly (P/N 1568-2100).

1650B-15

40

APPENDIX

Type 1560-PAO PREAMPLIFIER

FEATURES:

High input impedance; low output impedance.

Low electrical noise level. Voltage gain of 1 or 10.

Compact. Adaptable to many uses.

Microphone cartridge attaches directly.

USES: The TYPE 1560-P40 Preamplifier is a high-input impedance, low-noise preamplifier. It is particularly well suited for amplifying the output of piezoelectric transducers, such as microphones and vibration pickups, and for driving long connecting cables without loss in signal voltage. It is also a useful probe amplifier for other electrical signals where its high input impedance and low noise are necessary. For example, it can increase the sensitivity and input impedance of the

TYPES 1900, 1564, and 1558 Analyzers, the TYPE 1521

Gra .

phic Level Recorder, the TYPE 1142 Frequency

Meter, the TYPES 1150 and 1151 Digital Frequency

Meters, the TYPES 1232, 1206, and 1233 Amplifiers, the

TYPE 1806 Electronic Voltmeter, and low-frequency oscilloscopes.

DESCRIPTION: The TYPE 1560-P40 is a three-stage negative-feedback amplifier that makes full use of the lownoise and high-input-impedance characteristics of a unipolar transistor (FET). The feedback can be switched by the user to obtain a voltage gain of either 1:1 or 10:1.

The amplifier is housed in a small cylindrical case. The

GR TYPE 1560-P5 Microphone cartridge plugs directly on to the input end of the case. Adaptors are available for connecting the preamplifier to the cartridge of the

GR TYPE 1560-P3 Microphone, to GR874 Connectors, and to 3-terminal microphone connectors. Output from the preamplifier is through a 3-terminal shielded connector. The required de supply voltage is applied from one of these terminals to ground. This voltage can be obtained directly from the TYPES l.j.'i8 and 1564 Analyzers or the rechargeable-battery power supply listed under TYPE 1560-P40H, below.

The preamplifier and accessories are available in various combinations.

The TYPE 1560-l'40H Preamplifier and Power Supply

Set is self-powered and independent of any external supply so that it can be used with the TYPE 1900-A

Wave Analyzer as well as with all the other instruments mentioned above (see USES).

The TYPE 1560-P40J Preamplifier and Adaptor Set is dependent for its power on the instrument to which it is connected, so that it should be used with the TYPES 1558 and 1564 Analyzers. If the connector from the source is not one of those for which an adaptor is supplied, the

GR874 Adaptors listed on page 81 can be used with the TYPE 1560-P98 Adaptor to mate with almost all standard coaxial connectors.

The TYPE 1560-P40K Preamplifier and ;,ricrophone

Set is for use with the TYPES 1558 and 1564 Analyzers when an acoustical measurement is needed at low levels and the microphone must be mounted at the end of a cable.

SPECIFICATIONS

Gain :

1

:I or 10:1 (20 dB)

±

0.3 dB.

Input Capacitance :

Input Resistance :

6 pF.

>

500

1\1!1 at low audio frequencies.

Output Resistance : I :I gain approx 5

!1.

10:1 gain approx 100

!1.

Noise:

~2.5 I'V equivalent input voltage (400-pF source impedance, C-weighted, 8-kc effective bandwidth) .

Frequency Response :

±

0.3 dB from 5 c / s to 500 kc / s.

Harmonic Distortion at Audio Frequencies :

Open circuit, at 1 V, peak-to-peak: <0.25%.

Capacitor load of O.Dl I'F (equivalent to a cable over 200-ft long): Maximum output ( peak-to-peak ) at 1% distortion is 5 V for 1 kc / s, 2 V for 10 kc / s.

Accenorie5 Available

(in combinations listed belO\\ ' ): Power supply, includes two 9.6-volt nickel-cadmium rechargeable batteries, a charging circuit, a battery -ch eck light, and a power cord .

TYPES

1560-P96, 1560-P97, and 1560-P98 Adaptors for converting the input pin connections to 3-terminal shie ld ed microphone connectors, to the pin sockets necessary for the cartridge of a

TYPE

1560-P3 Microphone, and to a General Radio

TYPE

874

Connector, respectively.

TYPES

1560-P72 (25-ft) and 1560-P72C (4-ft) cables for supplying power to and transfening the signal from the preamplifier.

TYPE

!560-P95 Adaptor Cable for connecting the signal from the power supply through a cable to a

TYPE

274 Double Plug.

TYPE

1560-P99 Adaptor Cable for connection from phone plug to microphone plug.

Power Supply:

Dimensions:

15 V to 25 V, 1 rnA to 2 rnA, de. length 6Ys, diameter 1.155 by 1 in (175, 30, 26 mm).

Net Weight: 9 oz

(0.3 kg ) .

Shipping Weight: 3 lb

(1.4 kg).

TYPE 1560-P40H

PREAMPLIFIER AND POWER SUPPLY SET

Consists of:

Type 1560-P40 Preamplifler

Type 1560-P96 Adaptor

Type 1560-P98 Adaptor

Type 1560-P95 Adaptor Cable

Type 1560-P99 Adaptor Cable

Type 1560-P72C Cable (4 It)

Type 874-Q2 Adaptor

Power Supply

Shipping Weight : 10 lb

(4 .

6 kg).

TYPE 1560·P40J

PREAMPLIFIER AND ADAPTOR SET

Consists of:

Type 1560-P40 Preomplifler

Type 1560-P96 Adaptor

Type 1560-P97 Adaptor

Type 1560-P98 Adaptor

Type 1560-P72C Cable (4 It)

Shipping Weight: 4 lb ( 1.!) kg).

TYPE 1560-P40K

PREAMPLIFIER AND MICROPHONE SET

Consists of:

Type 1560-P40 Preamplifler

Type 1560-P72C Cable (4 ft)

Type 1560-P72 Cable (25ft)

Type 1560-P32 Tripod

Microphone Cartridge

Shipping Weight:

14 lb (6.5 kg).

GENERAL RADIO COMPANY

WEST CONCORD, MASSACHUSETTS Ot7Bt

B t 7 3 6 9 - 4 4 0 0 6 t 7 6 4 6 - 7 4 0 0

METROPOLITAN

NEW YORK*

845 Brood Avenue

Ridgefield, New Jersey 07657

Telephone N .

Y .

212

964-2722

N .

J . 201

943 3140

SYRACUSE

Pickard Building

East Molloy Rood

Syracuse, New York I 321 _I

Telephone 315 454 9323

NEW ENGLAND*

22

Boker Avenue

West Concord, Mossochusells 01781

Telephone 617 646-0550

PHILADELPHIA

Fort Washington Industrial Parle

Fori Washington, Pennsylvania I 9034

Telephone 215 646 8030

WASHINGTON*

AND BALTIMORE

I I

420 Roclcville Pi lee

Roclcville, Maryland 20852

Telephone 301 946

-

I

600

ORLANDO

I 13

East Colonial Drive

Orlando, Florida 32801

Telephone

305 425-4671

• Repair services ore available at these district offices.

DISTRICT OFFICES

CHICAGO*

9440 W. Fosler Avenue

Chicago, Illinois 60656

312 992 0800

CLEVELAND

5579 Pearl Rood

Cleveland, Ohio 44129

Telephone 216 886

0150

LOS ANGELES*

1000 North Seward Street los Angeles,

California 90038

Telephone 213 469-6201

SAN FRANCISCO

626 Son Antonio Rood

Mountain View, California 94040

Telephone 415 948 8233

DALLAS*

2600 Slemmons

Freeway,

Suite 210

Do/los, Texas 75207

Telephone 214 637-2240

TORONTO*

99

Floral Porlcwoy

Toronto 15, Ontario, Canada

Telephone 416 247 2171

MONTREAL

I 255 laird Boulevard

Town of Mount Royal, Quebec, Canedo

Telephone

514 737-3673

OTTAWA

Telephone 613 233 4237

General Radio

Company

(Overseas},

8008

Zurich, Switzerland

General Radio

Company

(U.K.J Limited, Bourne End, Buckinghamshire, England

Representatives

in

Principal Overseas

Countries

Printed in USA

Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement