Hewlett Packard 211B Square Wave Generator Operating and Service Manual

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CE RTI FI CATION
The Hewlett-Packard Company certifies that this instrument was
thoroughly tested and inspected and found to meet its published
specifications when it was shipped from the factory. The HewlettPackard Company further certifies that its calibration measurements are traceable to the U.S. National Bureau of Standards to
the extent allowed by the Bureau's calibration facility,
WARRANTY AND ASSISTANCE
This Hewlett-Packard product is warranted against defects
in materials and workmanship. This warranty applies for
one year from the date of delivery, or, in the case of certain
major components listed in the operating manual, for the
specified period. We will repair or replace products which
prove to be defective during the warranty period provided
they are returned to Hewlett-Packard. No other warranty
is expressed or implied. We are not liable for consequential
damages.
Service contracts or customer assistance agreements are
available for Hewlett-Packard products that require maintenance and repair on-site.
For any assistance, contact your nearest Hewlett-Packard
Sales and Service Office. Addresses are provided at the
back of this manual.
I
I
OPERATING AND SERVICE MANUAL
MODEL 2118
SQUARE WAVE GENERATOR
SERIALS PREFIXED: 0817 ARefer to Section VII for instruments with other Serial Prefixes.
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HEWLETT-PACKARD COMPANY/COLORADO SPRINGS DIVISION
1900 GARDEN OF THE GODS ROAD, COLORADO SPRINGS, COLORADO, U.S.A.
I
Manual Part Number 00211-90901.
Microfiche Part Number 00211-90801.
PRII\lTED: MAR 1971
Model 211 B
Table of Contents
TABLE OF CONTENTS
Page
Section
.. 1-1
.. 1-1
.1-2
GENERAL INFORMATION
.
1-1. Description.............
1-4. I nstrument Application .
1-6. Equipment Available
~ut Not Supplied ...
1-8. I nstrurnent and Manual
Identification
.
.
.
1-12. Inquiries.
.1-2
.. .1-2
II
INSTALLATION
2-1. Initial Inspection
2-4. Preparation For Use
2-5.
Three-Conductor Power Cord
2-7.
Power Requ irements . . . .
2-11. Claims. . . . . . . . . . . . . .
2-13. Repackaging For Shipment. .
2-1
2-1
2-1
2-1
. .. 2-1
. .. 2-1
. .. 2-1
III
OPERATION
3-1. Introduction . . . . . . .
3-3. Controls and Connectors ..
3-8. Operating Considerations ..
3-9.
External Synchronization
3-11.
Trigger Output
3-13. 0 perating Procedures . . . . .
IV
ii
PRINCIPLES OF OPERATION
.
4-1. Introduction
.
4-3. Block Diagram Description ..
4-5.
Fine-Frequency Control ..
4- 7.
Cu rrent Sou rces . . . . . .
4-9.
Coarse-Frequency Control .
4-11.
Schmitt Trigger
.
4-13.
Switching Circuitry
.
Output Circu its
.
4-15.
4-17.
Synchron ization Circu it ..
4-19. Circuit Details
.
4-21.
Coarse-Frequency Control.
4-25.
Fine-Frequency Control ..
4-28.
Schmitt Trigger Circuit "
4-30.
Switching Circuit
.
4-32.
Output Circu its
.
4-39.
Synchronization
.
4-43.
Power Supplies
.
.
.
.
.
·
·
·
·
Section
V
PERFORMANCE CHECK AND
ADJUSTMENTS
5-1
5-1. Introduction . . . . . . . . . . . . . . . . .5-1
5-1
5-3. Required Test Equipment
5-5. Performa nce Check
. .5-1
5-6.
Procedure
5-1
5-8.
Frequency Check
5-1
5-9.
Symmetry Control Check
5-3
5-10.
Synchronization Check
5-3
5-11.
600-0hm Output Check
5-4
5-12.
Risetime and Falltime
5-4
5-13.
50-Ohm Output Check . . . . . . . . . .5-4
5-15.
Symmetry (10 MHz)
5-5
5-16.
Trigger Output Check
5-5
5-18. Adjustments
5-5
5-21.
Power Supply Adjustment
5-7
5-22.
Frequency Adjustment
5-7
5-23.
Synchronization Adjustment
5-8
Pulse Amplitude 600-0hm
5-24.
Output Adjustment
5-8
VI
REPLACEABLE PARTS
6-1. Introduction
6-4. Ordering Information
6-1
6-1
6-1
VII
MANUAL CHANGES AND OPTIONS
7-1. Manual Changes
7-3. Older Instruments
7-5. Options........
.
7-7. Special Instruments
7-1
7-1
7-1
7-1
7-1
VIII
SCHEMATICS AND
TROUBLESHOOTING
8-1. Introduction . . . . . . .
8-3. Reference Designations
8-7. Component Identification
8-9. Repair and Replacement
8-11. Servicing Etched Circuit
Boards
8-14. Troubleshooting
.1-2
3-1
3-1
3-1
3-1
3-1
3-1
. . . . .3-1
· .. 4-1
· . .4-1
· . .4-1
4-1
4-1
4-1
· . .4-1
· . .4-1
· .. 4-1
· . .4-1
.4-1
· .. 4-1
· .. 4-3
· .. 4-3
· .. 4-3
· .. 4-3
.4-4
4-4
Page
8-1
8-1
8-1
8-1
8-1
8-1
8-1
Model 211B
List of Illustrations
List of Tables
LIST OF ILLUSTRATIONS
Figure
Title
Page
1-1.
Model 211 B Square Wave Generator
3-1.
Front-Panel Controls and Connectors
4-1.
4-2.
Model 211B Block Diagram
Schmitt Trigger Operation . . . . . . . .
5-1.
5-2.
5-3.
5-4.
5-5.
5-6.
5-7.
Typical Waveform Characteristics
Frequency Check Test Setup
Synchronization Test Setup
600-0hm Output Test Setup
50-Ohm Output Test Setup
Trigger Output Test Setup
Component Adjustment Location
Title
Figure
Page
Pulse Generator Troubleshooting Tree
· .. 8-3
-70-Volts Supply Troubleshooting Tree
· .. 8-3
-20-Volts Supply Troubleshooting Tree . · .. 8-3
50 Ohms-600 Ohms Output
Troubleshooting Tree
8-4
8-5. Chassis Component Identification Top View
8-4
8-6. Chassis Component Identification Bottom View . . . . . . . . . . . . . . . . . . .8-4
8·5
8-7. Attenuator Assembly A 1 Schematic
8-5
8-8. Power Supply Schematic
8-6
8-9. Assembly A2 Component Identification
8-7
8-10. Test Point Waveforms
8-7/8-8
8-11. Frequency Control Schematic
8-9
8-12. Output Circuitry Schematic
. . . 1-0
8-1.
8-2.
8-3.
8-4.
3-0
.4-0
.4-2
5-1
5-3
5-3
5-4
5-4
5-5
5-7
LIST OF TABLES
Page
Title
Table
.1-1
1-1.
Specifications
2-1.
Shipping Carton Test Strength
5-1.
5-2.
5-3.
Required Test Equipment
5-0
Frequency Check
5-2
Selected Components . . . . . . . . . . . . . . . .5-6
Performance Check Record
5-8a/b
6-1.
6-2.
Reference Designators and
Abbreviations.
Replaceable Parts
.
.6-1
.6-2
7-1.
Manual Changes . . . . . . . . . . . . . .
.7-1
8-1.
8-2.
Schematic Notes
Voltages with Schmitt Trigger
Locked in one State . . . . .
DC Voltage and Waveform
Test Conditions
.8-0
8-3.
...
.2-1
.8-6
8-6
iii
Section I
Figure 1-1
Model 2118
211B SQUARE WAVE GENERATOR
HEWLETT. PACKARD
SYMMETRY
_ _ _ _ _ MULTIPLIER
AMPLITUDE
IV ACROSS SOllJ
.S
.os
TRIGGER
POLARITY
VERNIER
OUTPUT
OUTPUT
.~
a
/.
AMPLITUDE
t
i
LiNE
I
r \
SYNC. INPUT
+
TRIGGER
OUTPUT
SOOg
PUSH ON/OFF
•
Figure 1-1. Model 211 B Square Wave Generator
1-0
SOg
Model 2118
Section I
Paragraphs 1-1 to 1-3
I
SECTION I
GENERAL INFORMATION
1-1.
DESCRIPTION.
1-2. The Hewlett-Packard Model 2118 Square Wave
Generator (Figure 1-1) is a fully-transistorized,
general-purpose instrument that provides negative
square-wave output signals of variable frequency, width,
and amplitude. I n addition, trigger output signals of
reversible polarity are provided for synchronizing external
circuits or instruments. The Model 2118 Square Wave
Generator (hereafter referred to as the Model 2118) is a
free-running instrument. It may be synchronized with an
external sjgnal. The frequency range of the Model 2118 is
from 1 Hz to 10 MHz when terminated in a 50-ohm load.
The amplitude of the signal is variable from 0 volt to -5
volts with an adjustable pulse width of 25% to 75% of the
period. The risetime or falltime of the output pulse is less
than 5 nanoseconds. When the output of the instrument is
terminated in a 600-ohm load, the frequency range is from
1 Hz to 1 MHz with a variable amplitude from 0 volt to
-30 volts. The adjustable pulse width is the same as for
the 50-ohm termination. The risetime or falltime of the
60o-ohm output pulse is less than 70 nanoseconds.
Complete performance specifications are given in Table
1-1.
1-3. A separate facility for trigger output pulses is also
provided. The trigger output pulses are coincidental with
the leading edge of the output pulses at the 50-ohm
connector. The trigger output circuit is used for
synchronizing external circuits or instruments. Polarity of
the trigger pulses is selective (either positive or negative)
and their amplitude is greater than 2 volts. The pulse
width is less than 10 nanoseconds when terminated in a
50-ohm load.
Table 1-1. Specifications
REPETITION RATE AND TRIGGERING
INTERNAL
50-ohm output: 1 Hz to 10 MHz, 7 ranges.
600-ohm output: 1 Hz to 1 MHz, 6 ranges.
Period Jitter: < 0.2% at any duty cycle and
repetition rate setting.
EXTERNAL
Sync I nput: sine waves or positive pulses from 1 Hz
to 10 MHz; frequency of synchronizing signal
must be from 105% to 140% of frequency dial
setting.
Sensitivity: dc coupled, positive pulses, 2V pk; sine
waves, 4V pk-to-pk.
Input Resistance: approximately 500 ohms.
TRIGGER OUTPUT
Width: 10 (±5) ns at 50% point.
Amplitude: at least 2V into 50 ohms.
Timing: coincident with leading edge of 50-ohm
pulse.
Polarity: positive or negative.
OUTPUT
Symmetry: variable from 25% to 75% duty cycle.
Polarity: negative.
50-OHM SOURCE
Pulse Shape: (measured at 5V into 50 ohms).
Risetime and Falltime:< 5 ns.
Amplitude: peak 5V into 50 ohms, 10V into an
open circuit; output circuit protected, cannot be
damaged by shorting.
Attenuator: 0.05V to 5V, in a 1,2.5,5 sequence.
Vernier: provides continuous adjustment between
ranges.
GOO-OHM SOURCE
Risetime and Falltime:< 70 ns into 600 ohms;< 140
ns into an open circuit; decreased amplitude will
improve risetime.
Amplitude: at least 30V peak into 600 ohms; at
least 60V into an open circuit.
Attenuator: provides continuous adjustment from
full output to less then 0.3V into 600 ohms.
GENERAL
Power: 115V or 230V (+10%-15%). 50 to 400 Hz,
23W.
Dimensions: 7-3/4 in. wide 6-1/8 in. high, 11 in.
deep overall (190 by 155 by 279 mm).
Weight: net 9 Ibs (4 kg); shipping 11 Ibs (5 kg).
1-1
Model 2118
Section I
Paragraphs 1-4 to 1-13
'-4.
The serial prefix is the first four digits of the serial number
(OOOO-A-OOOOO) used to identify each HP instrument.
INSTRUMENT APPLICATION.
1-5. With its variable pulse amplitude and width
characteristics, the Model 2118 is useful as a
general-purpose laboratory or production-line instrument.
Due to its compact size and ease of operation, it is an ideal
s ingle-unit instrument for test applications where
synchronization triggering and pulse generator facilities are
desired simultaneously.
1-6. EQUIPMENT
SUPPLIED.
AVAILABLE
BUT
NOT
1-7. A complete line of electronic test equipment is
available from Hewlett-Packard Company for use in
making test measurements with or maintaining the Model
2118. Also available are cables, connectors, adapters, and
other accessory items for use in various test or
measurement applications. For information on specific
items consult the Hewlett-Packard catalog or the nearest
Hewlett-Packard Sales/Service Office.
1-8.
II\lSTRUMENT
IDENTI FICATION.
AND
MANUAL
1-9. This manual applies directly to Model 2118
instruments with a serial prefix as listed on the title page.
1-10. As changes or refinements are made in the Model
2118, newer instruments may have higher serial prefixes
assigned. Check the serial prefix of the instrument (serial
tag usually located on the rear of chassis). If the serial
prefix of the instrument is a number higher than listed on
the title page, a MANUAL CHANGES sheet will be
provided to update the manual to correspond with the
newer instrument. If the serial prefix of the instrument is a
number lower than listed, refer to Section VII for
backdating information.
1-11. Any known corrections to the manual due to errors
that existed when it was printed are called errata. These
corrections (if any) will also appear on a MANUAL
CHANGES sheet.
1-12. INQUIRIES.
1-13. Refer any questions regarding MANUAL CHANGES
sheets, the manual, or the instrument in general to the
nearest HP Sales/Service Office. Always identify the
instrument by both model number and complete serial
number (nine digits) in all correspondence. Refer to the
inside rear cover of the manual for a world-wide listing of
HP Sales/Service Offices.
The warranty may be void for instruments having a mutilated serial number
tag.
1-2
Model 2118
Section II
Paragraphs 2-1 to 2-15
SECTION II
INSTALLATIOI\l
2-1.
INITIAL INSPECTION.
2-2. MECHANICAL CHECK. Inspect the Model 2118
upon receipt for any damage which may have occurred in
transit. Check for external damage such as broken knobs,
bent or broken connectors, and dents or scratches on the
panel surface. If damage is found, refer to Paragraph 2-11
for recommended claim procedure. Retain packing
material for possible future use.
2-3. ELECTRICAL
CHECK. Check
the electrical
performance of the Model 2118 as soon as possible after
receipt (refer to Section V for recommended performance
checks). These checks verify that the Model 2118 is
operating within the specifications listed in Table 1-1. The
performance check is a good test procedure for incoming
quality-control inspection. Initial performance and
accuracy of the instrument are certified as stated on the
inside front cover of this manual. If the Model 2118 does
not operate as specified, refer to Paragraph 2-11 for claim
procedure.
2-4.
2-5.
PREPARATION FOR USE.
THREE-CONDUCTOR POWER CORD.
2·6. The National Electrical Manufacturers Association
(NEMA) recommends the instrument panel and case be
grounded to protect operati ng personnel. The Model 2118
is equipped with a detachable three-conductor power cord
which grounds the instrument panel and case when
connected to the appropriate three-conductor outlet.
When operating the Model 21'18 from a two-conductor
outlet, a three-conductor to two-conductor adapter must
be used. Grounding the adapter at the electrical outlet will
preserve the safety feature,
2-7.
POWER REQUIREMENTS.
2-8. The Model 2118 requires either 115 or 230 Vac
+10%-15%, single-phase, 50 to 400 Hz power source
capable of delivering 23 watts.
2-10. 230-VOLT AC OPERATION. Ensure that the slide
switch on the rear panel of the Model 2118 indicates
230V. Operating the Model 2118 from a power source of
230-Volt ac when the slide switch is in the 115V position
will result in severe damage to the instrument, Fuse the
Model 2118 with a 0.25A slo-blo fuse when operating on
230- Volts ac.
2-11. CLAIMS.
2-12. The
warranty statement applicable to all
Hewlett-Packard Company instruments and products is
provided inside the front cover of this manual. If physical
damage is found or if operation is not as specified when
the instrument is first received, notify the carrier and the
nearest Hewlett-Packard Sales/Service Office immediately
(refer to list in back of manual for addresses). The HP
Sales/Service Office will arrange for repair or replacement
without waiting for settlement of the claim with the
carrier.
2-13. REPACKAGING FOR SHIPMENT.
2-14. If the Model 2118 is to be shipped to a
Hewlett-Packard Sales/Service Office for service or repair,
attach a tag showing owner (with address), instrument
serial number (all nine digits), and a description of the
service or repair required.
2-15. The original shipping carton and packaging material
may be reusable. The HP Sales/Service Office will provide
information and recommendations on materials to be used
if the original packaging material is not available. Materials
used for shipping an instrument should include the
following:
a. a double-walled carton; refer to Table 2-1 for test
strength required.
b. heavy paper or sheets of cardboard to protect all
instrument surfaces; use a nonabrasive material such as
polyurethane or cushioned paper such as Kimpak
around all projecting parts.
c. a mimumum of 4 inches of tightly-packed,
industry-approved, shock-absorbing material such as
extra-firm polyurethane foam.
8efore applying power. ensure that the
rear panel power switch is in the proper
position.
I
2-9. 115-VOLT AC OPERATION. Ensure that the slide
switch on the rear panel of the Model 2118 indicates
115V. The proper fuse (0.5A) for 115-Volt ac operation is
factory installed.
Table 2-1. Shipping Carton Test Strength
Gross Weight (Ibs)
up
10
30
120
140
to
to
to
to
to
10
30
120
140
160
Carton Test Strength (Ibs)
200
275
350
500
600
2-1
Model 211B
Section III
Figure 3-1
•
4
3
5
~v~fR~~~~~~
.5
&•
.06
2
TRIGGER
POLARITY
AMPLITUDE
6
(
. SYNC. INPUT
7
12
II
10
8
9
2I1B-A-B
1. LINE. Applies ac power to the instrument.
Indicator lamp lights when power is applied.
2. FREQUENCY
(Hz). Selects
the output
frequency within the range determined by the
MULTIPLIER setting.
voltage for the range
AMPLITUDE switch.
7. OUTPUT
pulse.
selected
by
the
50-ohm. Supplies 50-ohm output
8. AMPLITUDE. Controls voltage amplitude of
3. MULTIPLI ER. Selects the operating range for
the FREQUENCY (Hz) dial.
4. SYMMETRY. Varies the duty cycle of the
pulse period.
5. AMPLITUDE. Selects the voltage range of the
50-ohm output pulse.
6. VERNIER. Provides continuous adjustment
for the voltage range of the 50-ohm output
pulse. Maximum cw pOSition gives maximum
the 60o-ohm output pulse.
9. OUTPUT 600-ohm. Supplies 600-ohm output
pulse.
10. TRIGGER POLARITY. Selects either negative
or positive trigger output pu Ise.
11. TRIGGER OUTPUT. Supplies trigger output
pulse.
12. SYNC INPUT. Input connector for external
synch ron ization signa Is.
Figure 3-1. Front-Panel Controls and Connectors
3-0
Model 211B
Section III
Paragraphs 3-1 to 3-14
SECTION III
OPERATION
3-1.
INTRODUCTION.
3-2. This section includes explanation of front-panel
controls and adjustments, available modes of operation,
triggering considerations and step-by-step operati ng
instructions for most applications.
3-3.
CONTROLS AND CONNECTORS.
3-4. Although the functions described in Figure 3-1 are
brief, they provide a ready reference for the operator. A
more detailed description of some of the controls and
connectors is given in the following paragraphs.
3-5.
SYMMETRY CONTROL. The SYMMETRY
control on the front panel of the Model 211 B varies the
duty cycle of the output pulse without affecting the
frequency. The duty cycle is variable between 25% and
75% of the pulse period and is unaffected by external
triggering and repetition rate.
I
3-10. The Model 211 B may be synchronized by either a
+2-volt minimum pulse or a 4-volt minimum peak sine
wave applied to the SYNC I NPUT connector. The
frequency of the synchronization signal must be between
105% and 140% of the internal frequency setting. If
difficulty is encountered when synchronizing with an
external source, recheck the dial frequency setting, the
synchronization frequency, and the amplitude of the
synchronization signal.
3-11. TRIGGER OUTPUT.
3-12_ The positive or negative trigger pulses which are
available at the TRIGGER OUTPUT connector have an
amplitude greater than 2 volts (across a 50-ohm load),
approximately 10 nanoseconds in width, and are
coincidental with the leading edge of the 5Q.ohm output
pulse.
3-13. OPERATING PROCEDURES.
3-6. 5O-0HM AMPLITUDE CONTROL. The amplitude
of the 50-ohm output pulses is controlled by an
AMPLITUDE switch and a VERNIER control. The
AMPLITUDE control is a seven-position attenuator switch
covering an output voltage range from -0.05 volt to -5
volts. The voltage range selected by the attenuator setting
is variable by the VERNIER control (from near zero volt
to maximum output for the particular range selected).
3-14. The Model 211 B is capable of generating any
frequency from 1 Hz to 10 MHz (maximum of 1 MHz at
the 60o-ohm connector). The frequency is established by
setting the MULTIPLIER switch to any of seven ranges
and adjusting the FREQUENCY (Hz) control to the
specific frequency desired. The Model 211 B is free-running
at the frequency indicated by the front-panel frequency
controls. To operate the instrument, proceed as follows:
3-7.
600-0HM AMP L1TUDE CONTRO L. The
amplitude of the 60o-ohm output pulse is controlled by
the AMPLITUDE control located directly above the
60o-ohm output connector. The amplitude is continuously
variable from zero volt to -30 volts when terminated in a
60o-ohm load.
a. To apply power, press the LINE switch. The power
lamp should light.
3-8.
3-9.
OPERATING CONSIDERATIONS.
b. Set the MULTIPLIER switch to the correct frequency
range and adjust the FREQUENCY (Hz) control to the
desired frequency.
c. Adjust the SYMMETRY control for the required pulse
width as observed on an oscilloscope.
EXTERNAL SYCHRONIZATION.
d. When using the 50-ohm output circuit, select the
proper voltage attenuator range with the AMPLITUDE
selector switch. Adjust the VERNIER control for the
exact voltage required. Refer to Table 1-1 for output
termination characteristics.
Input synchronization signal must not
exceed 20 volts peak and power must be
less than 0.25 watt.
e. When using the 60o-ohm output circuit, adjust the
AMPLITUDE control for the required voltage amplitude.
Refer to Table 1-1 for termination characteristics.
I
3-1
Model 211B
Section IV
Figure 4-1
IAMPLITUDE
Q
I
I
SYNC
INPUT
>-
SYNC
600n
CIRCUIT
OUTPUT
AMPLIFIER
ISYMMETRY I
o
I VERNIER
\
\
IQ
IAMPLITUDE I Q
I
UPPER
CURRENT
SCHMITT
TRIGGER
SOURCE
CIRCUIT
RAMP CHARGE
I--
J1..JL
50n
OUTPUT
AMPLIFIER
I
~
ATTENUATOR
k
L -_ _..J
F REQUENCY 1
(HZ)
Q
1 TRIGGER. 1
Q
POLARITY
I
\
\
I
FINE
TRIGGER
SWITCHING
FREQUENCY
CONTROL
ISYMMETRY
OUTPUT
CIRCUIT
CIRCUIT
"
I
Q
\
\
LOWER
CURRENT
SOURCE
AMPLIFIER
RAMP DISCHARGE'
DEGENERATIVE
FEEDBACK FOR
RAMP CAPACITOR
(COARSE FREQ
CONTRCL)
LOWEST THREE
FREQUENCIES
:
;*:
I
(
I
L...-------~
I MULTIPLIER
I
6
I
S5
ZlrS-C-7
Figure 4-1. Model 211B Block Diagram
4-0
Model 211 B
Section IV
Paragraphs 4-1 to 4-23
I
SECTION IV
PRINCIPLES OF OPERATION
4-1.
INTRODUCTION.
4-2. This section presents the theory of operation for the
Model 211 B Square Wave Generator. The first portion
contains a general description of circuit functions using a
block diagram (Figure 4-1) to supplement the written
description. The second portion provides a detailed
description of the operational theory written for use with
the schematics which are located in Section VIII of this
manual.
output at a repetition rate established by the coarse and
fine frequency control circuits. The Schmitt-trigger output
is applied to the output amplifiers.
4-13. SWITCHING CIRCUITRY.
4-14. The switching circuit is controlled by a signal fed
back from the Schmitt trigger. It regulates the charge or
discharge state of the selected ramp capacitor.
4-15. OUTPUT CIRCUITS.
4-3.
BLOCK DIAGRAM DESCRIPTION.
4-4. The Model 211 B consists of a fine-frequency
control, two current sources, a coarse-frequency control,
and a Schmitt trigger circuit. The output of the Schmitt
trigger is applied to three amplifier circuits. The amplifier
circuits produce symetrical output pulses which are
present at the 50-ohm, 60o-ohm, and TRIGGER OUTPUT
con nectors.
I
4-5.
FINE-FREQUENCY CONTROL.
4-6. The front-panel control, FREQUENCY (Hz),
establishes the pulse repetition rate of the square-wave
generator by adjusting the bias applied to the two current
sources.
4-7.
CURRENT SOURCES.
4-8. The current sources (referred to as the upper and
lower current sources in the block diagram) operate as
current regulators for the coarse-frequency control circuit.
The upper current source provides the current for charging
the selected ramp capacitor in the coarse-frequency
control circuit and the lower current source establishes the
rate of discharge.
4-9.
COARSE-FREQUENCY CONTROL.
4-10. The MULTIPLI ER switch, located on the front
panel of the Model 211 B, selects various
resistance-capacitance networks which determine the slope
of the ramp waveform. The various sawtooth waveforms
developed by the ramp capacitance networks establish the
repetition rate for the Schmitt trigger circu it.
4-11. SCHMITT TRIGGER.
4-12. The sawtooth waveform from the ramp capacitance
network alternately crosses the upper and lower hystersis
limits of the Schmitt trigger. This results in a square-wave
4-16. The square-wave signal from the Schmitt trigger is
amplified and shaped by the 50-ohm and 600-ohm output
circuits. The trigger circuit differentiates the output of the
Schmitt trigger and reshapes the pulses. Polarity of the
trigger pulses is selectable by switch action.
4-17. SYNCHRONIZATION CIRCUIT.
4-18. The Model 211 B may be synchronized from an
external source. The synchronization signal is
differentiated and applied to the Schmitt trigger circu it.
4-19. CIRCUIT DETAILS.
4-20. Refer to the timing sequence in Figure 4-2 and the
schematics located in Section VIII of this manual when
using the detailed theory of operation.
4-21. COARSE-FREQUENCY CONTROL.
4-22. The coarse-frequency circuit is controlled by the
seven-position MULTIPLIER switch S5. Each position of
the MULTIPLIER switch selects the appropriate ramp
capacitor (A2C11 through A2C16) for the designated
frequency range. When the 1M frequency range is selected,
a network consisting of A2C8, A2C9, A2C10 and A2R31
is used to develop the higher frequency involved.
4-23. The selected ramp capacitor will charge and
discharge at a rate determined by current-source
transistors A2Q6 and A2Q7. Transistor A2Q6 functions as
a series regulator in the current path that charges the
selected capacitor. The charging rate of the ramp capacitor
forms the negative slope of the sawtooth waveform. The
output current of A2Q6 is directed to the ramp capacitor
by diode A2CR 11. Transistor A2Q7 functions as a series
regulator in the discharge path of the selected ramp
capacitor. The discharging rate of the ramp capacitor
forms the positive slope of the sawtooth waveform. Diode
A2CR 12 directs the discharge current from the ramp
capacitor through A2Q7 to ground.
4-1
Mode1211B
Section IV
Figure 4-2
CURRENT
-20 V -
SOURCE
(CHARGING)
r--
-:l~
~------------------------------------------,
I
I
I
I
I
I
SWITCHING
CI RCUIT
Q8/Q9
.....J
¥
r
INVERTER
QI3
*
I---
SCHM ITT
TRIGGER
CIRCUITRY
QI4 -Q16
I
~
OUTPUT
SELECTED
RAMP CAPACITOR
CURRENT
f-SOURCE
(01 SCHARGING)
OUTPUT
016
OV
UPPER
SCHMITT
TRIGGER
SW ITCH ING"'"
LEVEL
-5V
OUTPUT
_ "'"
014
INVERTER OUTPUT - - - - - - - - - - - - 013
S~~~f:T / - - - - - - - - - TRIGGER
SWITCHING
LEVEL
/
CHARGI NG RAMP
CAPACITOR
0 I SCHARGI NG RAMP
CAPACITOR
ZIIB
Figure 4-2. Schmitt Trigger Operation
4-2
-c
-2
Model 211B
I
4-24. Dual potentiometer R3 determines the duty cycle
for each period of the pulse repetition rate. It controls the
current in the emitter circuits of A2Q6 and A2Q7.
Potentiometer R3 is adjusted by the SYMMETRY control
knob on the front panel of the instrument. Varying the
SYMMETRY control changes the rate at which the upper
and lower hysteresis limits of the Schmitt trigger are
crossed per repetition pulse. This establishes the duty
cycle for each period.
4-25. FINE-FREQUENCY CONTROL.
4-26. The fine-frequency circuit of the Model 21'IB
consists of potentiometer R2, A2R24, A2R25 and A2Q5.
Potentiometer R2 is a 10: 1 vernier controlled by the
FREQUENCY (Hz) dial on the front panel of the
instrument. The FREQUENCY (Hz) dial establishes the
bias applied to current-control transistor A2Q5. The bias
on A2Q5 controls the voltage developed across resistors
A2R24 and A2R25. The voltages developed at A2R24 and
A2R 25 form the bias for charge and discharge transistors
A2Q6 and A2Q7. The rate at which A2Q6 permits the
ramp capacitor to charge and the rate at which A2Q7
permits it to discharge determine the repetition rate for
the instrument.
I
4-27. On the three lower frequency ranges (controlled by
A2Cll, A2C12 and A2C13), a degenerative feedback
network consisting of A2Qll and A2Q12 is used to
compensate for the slower charge and discharge rate
required. Transistor A2Q12 inverts the emitter signal of
A2Q13 and applies it to the base of A2Qll. The collector
circu it of A2Q 11 controls the bias on transistor A2Q 10.
Transistor A2Ql0 forms a low-impedance ground circuit
for the three lowest frequency capcitors. Variable resistors
A2R33, A2R34 and A2R35 control the amplitude of the
degenerative feedback signal. Refer to Section V of this
manual for proper adjustments.
4-28. SCHMITT TRIGGER CIRCUIT.
4-29. Charging of the selected ramp capacitor produces
the negative slope of the sawtooth waveform (Figure 4-2).
This signal is applied to the base of transistor A2Q13. The
inverted signal developed in the collector circu it of A2Q 13
is applied to the base of transistor A2Q 14. Transistors
A2Q14 and A2Q15 function as a Schmitt trigger circuit.
When the upper hysteresis limit of A2Q14 is reached, it
conducts heavily and A2Q15 is cut off. When the lower
hysteresis limit of A2Q14 is reached, it is biased off and
A2Q15 conducts. The square-wave signal developed by
A2Q15 is inverted by transistor A2Q16 and applied to the
output circuits.
4-30. SWITCHING CIRCUIT.
4-31. Synchronization of the charge and discharge
functions of the current sources is accomplished by
transistors A2Q8 and A2Q9. The output signal from the
Schmitt trigger is coupled through diode A2VR5 to the
base circuits of A2Q8 and A2Q9. Transistors A2Q8 and
Section IV
Paragraphs 4-24 to 4-36
A2Q9 are complementary (npn-pnp). Depending on the
polarity of the output pulse, one transistor will conduct
while the other is cut off. When A2Q8 is conducting
(positive transition of the signal from A2Q 16), diode
A2CR 11 is back biased and the charging circuit between
A2Q6 and the ramp capacitor is blocked. During the same
positive transition of the signal from A2Q16, transistor
A2Q9 is cut off. The discharge path from the ramp
capacitor through A2CR 12 and A2Q7 to ground is
operational. When A2Q8 is not conducting (negative
transition of the signal from A2Q16) the charge path from
the ramp capacitor through A2CR 11 and A2Q6 to the
-2o-volt source is operational. During the same negative
transition of the signal from A2Q 16, transistor A2Q9 is
conducting. With A2Q9 conducting, diode A2CR 12 is
back biased and the discharge path of the ramp capacitor
is blocked.
4-32. OUTPUT CIRCUITS.
4-33. TRIGGER OUTPUT. The output signal from
Impedance Converter A2Q16 is applied to a differentiating
circuit A2C18 and A2R45 in the trigger output circuit.
The positive spike developed by the differentiator is
applied to trigger amplifier A2Q17. The signal is shaped
into a negative pulse having a 10-nanosecond width and
greater than 2 volts in amplitude (when terminated in a
50-ohm load). The output of A2Q17 is connected to one
side of trigger-polarity switch S4 and transistor A2Q18.
Transistor A2Q18 inverts the negative pulse and applies it
to the other side of S4. The position of S4 determines the
polarity of the trigger output pulse.
4-34. 50-OHM OUTPUT CIRCUIT. The signal from
transistor A2Q16 is also applied to transistor A2Q23.
Transistor A2Q23 and A2Q25 are used to amplify and
shape the square-wave pulse. The output of A2Q25 is
applied to a cascode amplifier stage consisting of A2Q29,
A2Q30. A2Q32 and A2Q33. The output of the cascode
amplifier is connected to attenuator A 1.
4-35. The amplitude of the 50-ohm signal is controlled by
AMPLITUDE switch A1Sl and the VERNIER control on
the front panel of the instrument. The VERNIER control
varies the bias on amplitude-control transitor A2Q27. An
in-phase voltage at the emitter of A2Q27 is applied as bias
to the output cascode transistors A2Q32 and A2Q33. By
adjusting the bias on the output transistors, the amplitude
of the output signal is varied from near zero to -5 volts.
Diode A2CR20 functions as a protective device against
any inductive overloads.
4-36. An attenuator network is used to limit the
amplitude of the output signal to from -0.05 volt to -5
volts. Attenuator A 1 has three pi-type resistance networks.
These networks divide the signal from the cascode
amplifiers by factors of two, five and ten. Amplitude
switch A 1S1 selects the desired voltage range by
connecting the cascode ampl ifier output to selected
combinations of the pi-networks. The output of the
pi-networks is connected to the OUTPUT 50n connector
on the front panel of the instrument.
4-3
Model 211B
Section IV
Paragraphs 4-37 to 4-47
4-37. 60D-OHM OUTPUT. The signal from transistor
A2016 is also applied to amplifier A2024 in the 600-ohm
amplifier circuit. Transistors A2024 and A2026 amplify
and shape the square-wave pulses before applying them to
driver amplifier A2031. When the 1M frequency range is
selected, A2024 is reverse biased by the addition of
resistor R5 in its emitter circu it. There is no output from
the 60D-ohm circuit on the 1M frequency range. Variable
resistor A2R88, is adjusted for a signal amplitude which
results in no distortion of the output waveform.
4-42. When either A2021 or A2022 conducts (with
application of a synchronization pulse) a negative
20-nanosecond pulse is produced. The negative pulse is
connected to the base of either A2014 or A2015 in the
Schmitt trigger circuit. Since the pulse is applied to the
Schmitt trigger transistor which is conducting, the Schmitt
trigger switches operating states, thus synchronizing the
sawtooth waveform from the frequency control circuit to
the synchronization signal.
4-43. POWER SUPPLI ES.
4-38. The signal from A2026 is amplified by
driver-amplifier A2031 and applied to transistors 03 and
04 operating in cascode. (Transistors 03 and 04 are
located on the instrument chassis). Transistors 03 and 04
amplify and further shape the output signal. The
ampIitude of the output signal is continuously variable
from zero to -30 volts by resistor R6 (AMPLITUDE).
Diode A2CR21 functions as a protective device against
any inductive overload.
4-39. SYNCHRONIZATION.
4-40. An external synchronization signal may be applied
to the instrument at the SYNC I NPUT connector J2. The
synchronization signal must have an amplitude of at least
+2 volts peak and a frequency of 105% to 140% of the
frequency dial setting of the Model 211 B. The
synchronizing signal is applied to a divider bridge
consisting of diodes A2CR13-A2CR16. The diode bridge
configuration limits the amplitude of the input signal to
+4 volts.
4-41. When the synchron izi ng signal produces a posItive
voltage at the junction of A2CR14 and A2CR16,
tra nsistor A2019 conducts. The negative voltage
developed by A2019 is applied to A2020 through diode
A2VR9. Normally, A2020 is forward biased and
conducting. When the negative voltage from A2019 is
appl ied, A2020 is cut off. The magnetic field produced by
A2L 1 when A2020 is conducting collapses and produces a
2D-nanosecond positive pulse. Depending on the position
of the SYMMETRY control, the 2D-nanosecond pulse is
applied to either A2021 or A2022 by switch S3. The
synchronization pulses are appl ied to the Schmitt trigger
circu it during the longer slope of the ramp waveform.
When the duty cycle is below 50% of the pulse period, S3
connects the synchronizing pulses to A2022. When the
duty cycle is greater than 50% of the pulse period, the
synchronizing pulses are connected to A2021.
Synchronization is not possible at exactly 50% of the duty
cycle.
4-44. The regulated power supply operates from 115 or
230 volts ac. The voltage is rectified to provide the dc
outputs of -20 volts, -70 volts, and +6.8 volts. The two
primary windings of transformer T 1 are connected either
in series (230 volts ac operation) or in parallel (115 volts
ac operation) by switch S2.
4-45. -20-VOLT POWER SUPPLY. Diodes A2CR1 and
A2CR2 comprise a full-wave rectifer which furnishes the
negative voltage for the -2D-volt power supply. The
unregulated voltage is filtered by capacitor C1 and applied
to series regulator 01. Resistor A2R7, A2R8, and A2R9
form a voltage-divider network between ground and the
-2D-volt output. The base of error-amplifier A202 is
connected to the voltage-divider network and senses any
change in output voltage. The change in output voltage is
amplified and inverted by A202 and applied to
regulator-driver A201. Transistor A201 functions as an
emitter follower and is connected to the base circuit of
series regulator 01. This regulates the bias on 01 and
maintains the output of the power supply at -20 volts.
4-46. -7D-VOLT POWER SUPPLY. The -7D-volt power
supply functions in the same manner as the -20-volt
power supply with the exception of the rectifier circuit.
The secondary winding of transformer T1 used by the
-2D-volt power supply is center-tapped to ground. This
enables the use of the two-diode rectifier system. The
two-diode rectifier arrangement cannot be employed for
the -7D-volt power supply. The secondary winding of
transformer T 1 used for the -7D-volt power supply is not
center-tapped. The bridge network consisting of A2CR 5
through A2CR8 is used for full-wave rectification.
4-47. +6.8-VOLT POWER SUPPLY. Diodes A2CR3 and
A2CR4 form a full-wave rectifier which supplies the
+6.8-volt power for the instrument. Capacitor A2C5 filters
the rectified voltage. Resistor A2R 10 reduces the voltage
to the proper level and breakdown diode A2VR 1 regulates
the output.
I
4-4
Section V
Table 5-1
Model 211B
Table 5-1. Required Test Equipment
Recommended Instrument
Type
Model
Requ ired for
Sampling
Oscilloscope
HP 140A
with 1410A & 1425A
1 GHz Bandwidth
Performance Check
High-frequency
Oscilloscope
HP 180Awith
1801A & 1820A
SO MHz Bandwidth
50 mV/cm Sensitivity
Performance Check
Adjustments
Frequency
Counter
5245L
Period Meter
Frequency Counter
Performance Check
Adjustments
50-ohm Tee
HP 10221A
1 GHz Bandwidth
Perform nace Check
20 dB·So-ohm
Attenuator
Weinschel
Model S0-20-S
Use Recommended
Equipment
Performance Check
SO-ohm Load
HP 11048B
Feed-through Load
Performance Check
Adjustments
50-ohm
Termination
GR 874-WSO
1 GHz Bandwidth
Performance Check
600-ohm ±S% 2W
Performance Check
600-ohm Load
BNC Adapter
HP 10110A
BNC male to
Binding Post
Performance Check
Test
Oscillator
HP 651B
10 Hz to 10 MHz
3V Output Range
Performance Check
AC Voltmeter
HP 403B
0.003V to 0.03V
Voltage Range
Adjustments
Troubleshooting
DC Voltmeter
HP 412A
1 mV to 100V
Voltage Range
Adjustments
Troubleshooting
Digital
Voltmeter
3440A
3441A Plug-in
±O.OS% accuracy
4 digit display
Adjustments
Variable line
Voltage Supply
5-0
Required
Characteristics
..
100 - 128V
200 - 2SSV 2SVA
Adjustments
I
I
Model 211 B
Section V
Paragraphs 5-1 to 5-8
SECTION V
PERFORMANCE CHECK AND ADJUSTMENTS
5-1.
INTRODUCTION.
5-2. This section provides adjustment procedures and a
performance check for the Model 211 B. The performance
check may be used as an incoming inspection, or after
repairs or adjustments have been made to certify that the
in,strument meets the specifications listed in Table 1-1.
When the initial performance check is made, record the
indications on the Performance Check Record. These
indications may be used for comparisons with equipment
performance at a later date. Refer to paragraph 5-18 for
adjustment procedu res.
5-3.
REQUIRED TEST EQUIPMENT.
5-4. Test equipment recommended for both the
performance check and adjustments is listed in Table 5-1.
Similar equipment may be substituted provided it has the
required characteristics listed in the table.
5-5.
5-6.
PERFORMANCE CHECK.
warm-up. Perform the checks and adjustments in the same
sequence as they are listed. Figure 5-1 is a typical
waveform which illustrates points that are described in this
section.
5-8.
FREQUENCY CHECK.
a. See Figure 5-2. Connect the required equipment as
indicated.
b. Set the controls of the Model 211 B as follows:
MULTiPLIER
FREQUENCY (Hz)
SYMMETRY
AMPLITUDE (switch)
VERNIER
.
1
approximately 50%
5
cw
c. Set the Electronic Counter controls as follows:
PROCEDURE.
5-7. Connect the Model 211 B to an external power
source. Turn on the equipment and allow 10 minutes for
SIGNAL INPUT
AC
1V
SEI\JSITIVITY (VOLTS RMS)
TIME BASE. . . . . . . . . . . . . . . . . . . . . . . ..
.1 us
FUNCTION. . . . . . . . . ..
1 PERIOD AVERAGE
RISE TIME
Ig~:-
I
I
I
:
:
:
:---~t
PRESHOOT
OVERSHOOT,
-'- --
-- '--~r- -------~-:A-S~:I~: -------r-,I-'\~-. .-~= 90~:
:
100 01
ROUNDING
1
I
I
I
I
I
50% - - - - -~-'-:- - - - - - PULSE WI DTH - - - - - - - . , - ~ - - - - - I
I
I
I
I
I
I
I
50%
I
ROUNDI NG
:
90%--------
---:--"1---
100%----'--
-
-t- OVERSHOOT
i- - i--f
L
_ _ -'- _ _ '--
:
:
I
I
FALL TIME
_
10%
0%
PRESHOOT
ZIIB-A-6
Figure 5-1. Typical Waveform Characteristics
5-1
Section V
Table 5-2
Model 211B
Table 5-2. Frequency Check
Set MULTIPLIER
switch to
Set FREQUENCY (Hz)
dial to
Electron ic Counter
indication
microseconds
850000 - 1 150000
214000
186000 106000
94000 -
1
1
1
1
5
10
10
10
10
1
5
10
85000 18600 9400-
115000
21 000
10600
100
100
100
1
5
10
85001860940-
11 500
2140
1 060
Set Electronic Counter FUNCTION to FREQUENCY and TIME BASE to 1 sec
hertz
5-2
lK
lK
lK
1
5
10
850 - 1 150
4650- 5350
9.4K - 10.6K
10K
10K
10K
1
5
10
8.5K - 11.5K
46.5K - 53.5K
94K - 106K
lOOK
lOOK
lOOK
1
5
10
85K - 115K
465K - 535K
0.95M - 1.06M
1M
1M
1M
1
5
10
0.85M - 1.15M
4.65M - 5.35M
9AM - 10.6M
Model 2118
t,
Section V
Paragraphs 5-9 to 5-10
d. Accomplish the check by setting the Model 2118
MULTIPLI ER switch and FREQUENCY (Hz) dial as
shown in Table 5-2, columns one and two. The Electronic
Counter indication should be as shown in column three.
Note
5-10. SYNCHRONIZATION CHECK.
a. Th is procedure checks the ability of the Model 211 B
to synchronize on an external trigger source.
b. Connect the equipment as indicated in Figure 5-3.
When the MULTIPLIER switch is
advanced from 100 to 1K, the
Electronic Counter control settings must
be changed.
ISOA
i
211 B
5-9.
SYMMETRY CONTROL CHECK.
Ii
ISOlA
SYNC
a. With the Model 211 B connected as shown in Figure
5-2, set the controls as follows:
MULTIPLlER
FREQUENCY (Hz)
SYMM ETRY
AMPLITUDE (switch)
VERNIER
1-
A
Lt
10K
1
cw
5
cw
50n
651B
b. Set the high-frequency oscilloscope as follows:
TI ME/DIV
TRIGGER
MODE
VOLTS/DIV
IS20A
50n
10
INT
NORM
2
B
EXT
INPUT
0
150n
LOAD
600n
- 2J1B-A-2
Figure 5-3. Synchronization Test Setup
c. Adjust the high-frequency oscilloscope for a stable
display.
d. The pulse width should be greater than 75% of the
period.
e. Turn the SYMMETRY control of the Model 2118
fully ccw. The pulse width should be less than 25% of the
period.
c. Set the controls of the Model 211 B as follows:
MULTIPLlER
FREQUENCY (Hz)
SYMMETRY
AMPLITUDE (Switch) "
VERNIER
100K
10
ccw
5
cw
d. Set the high-frequency oscilloscope as follows:
IBOA
I
I
211 B
IBOI A
TRIG
500H~
FREQUENCY
AMPLITUDE
B
LOAD
10003B
PRO BE
)l
J
10120B
2.IIB-A-'5
Figure 5-2. Frequency Check Test Setup
110K
4V pk-to-pk
f. Adjust the high-frequency oscilloscope until one
pulse period occupies 8 divisions on the CRT.
£
5245L
5 usec
EXT
NORM
2
e. Set the test oscillator controls as follows:
IB20A
50 OHM
A
TtME/DIV
TRIGGER
MODE
VOLTS/DIV
g. Turn the FREQUENCY dial of the test oscillator
slowly until one pulse period occupies 4 divisions on the
oscilloscope CRT.
h. Turn the Model 211 B SYMMETRY control slowly
cwo Observe the phase shift reversal at 50% duty-cycle
point.
5-3
Model2118
Section V
Paragraphs 5-11 to 5-13
i. Repeat the procedure with the SYMM ETRY control
in the cw position.
5-11.
60~OHM
OUTPUT CHECK.
a. See Figure 5-1 for definition of pulse characteristics.
b. Connect the equipment as shown in Figure 5-4.
180Ac=
IBOIA
a. Set the high-frequency oscilloscope TIME/DI V dial
to .2 USEC and the VOLT/DIV dial to 1. Adjust the
60o-ohm AMPLITUD E control on the Model 2118 for 6
divisions deflection.
b. Move the leading edge of the pulse to the center of
the CRT. Set the oscilloscope MAGNIFIER to Xl0. Check
the risetime between 10% and 90% amplitude points. It
should be less than 7 divisions (140 ns).
c. Change the oscilloscope SLOPE to (+) and move the
trailing edge of the pulse to the center of the CRT. Check
fall time between the 10% and 90% amplitude points. It
shou Id be less than 7 divisions (140 ns).
1820A
2118
600n
5-12. RISETIME AND FALLTIME
A
d. Connect the Model 2118 output to a 600-ohm load.
10110A (ADAPTER)
e. Set the oscilloscope VOLT /DI V dial to .5. Check the
fall time between 10% and 90% ampl itude points. It
should be less than 3.5 divisions (70 ns).
100038
211B-A-7
f. Change the oscilloscope SLOPE to (-) and move the
leading edge of the pulse to the center of the CRT. Check
risetime between 10% and 90% amplitude points. It should
be less than 3.5 divisions (70 ns). Remove the 60o-ohm
load.
Figure 5-4. 600-0hm Output Test Setup
c. Set the Model 2118 controls as follows:
MULTIPLlER
10K
FREQUEI\JCY (Hz)
10
SYMMETRY
approximately 50%
AMPLITUDE. (60o-0hm control)
cw
r
140A
0
d. Set the high-frequency osci 1I0scope contro Is as
follows:
TIME/DIV
TRIGGER
MODE
SLOPE
VOLTS/DIV
2 usec
+,INT
NORM
(-)
10
1410A
A
1425A
TRIG
INPUT
~
/1
500 HM
TEE
2118
TRIG
500HM
1WEIN.
l~ATTEN.
~
e. Adjust the AMPLITUDE control of the Model 2118
for a pulse amplitude of 60 volts (6 divisions). The
overshoot should be less than 3 minor divisions (5%).
10120A
\..
~
21113 -A- 4
f. Connect a 600-ohm load across the 60o-ohm output
connector of the Model 2118. The pulse amplitude should
be 30 volts (3 divisions) ±5%.
Figure 5-5. 50-Ohm Output Test Setup
5-13.
5~OHM
OUTPUT CHECK.
a. Connect the equipment as shown in Figure 5-5.
g. Turn the AMPLITUDE 1600-ohm) control of the
Model 2118 fully ccw.
h. Set the oscilloscope VOLTS/DI V dial to .1 and
adjust the AMPLITUDE control of the Model 2118 for
0.3 volt (3 divisions) as indicated on the oscilloscope. The
overshoot should be less than 1.5 minor divisions.
Disconnect the 600-ohm load.
5-4
b. Set the controls of the Model 2118 as follows:
MULTIPLlER
FREQUENCY (Hz)
SYMMETRY
AMPLITUDE (Switch)
VERNIER
TRIGGER POLARITY
1M
5
50% duty cycle
5
cw
(-)
Model 2118
Section V
Paragraphs 5-14 to 5-20
c. Set the sampling oscilloscope controls as follows:
TIME/DIV
MAIN SWEEP MAGNIFIER
MAIN SWEEP TRIGGER
MAIN SWEEP TRIGGER SLOPE
MILLIVOLTS/DIV
SMOOTHING
20 nSEC
20
NORM
(-)
50
NORM
d. Adjust the pulse amplitude to 5 volts (10 divisions)
with the Model 2118 VERNIER.
e. Move the leading edge of the pulse to the center of
the CRT. The risetime shall be less than 5 ns.
son
o
211 B
TRIG
~"
1
WEIN
f. Move the trailing edge of the pulse to the center of
the CRT. The falltime shall be less than 5 ns.
TERMINATION
r---...,--------.:---....
140A
1410A
I F
r-
son
I
A@-~
1425A
TRIG
INPUT
J-
.....- - - - - - - -...
ATTENUATOR
21IB-A-3
5-14. With the Model 2118 controls set as in paragraph
5-13b, set the sampling oscilloscope controls and plug-in
units as follows:
TIME/DIV
MAIN SWEEP MAGNIFIER
MAIN SWEEP TRIGGER
MAIN SWEEP TRIGGER SLOPE
MILLIVOLTS/DIV
SMOOTHING
50 nSEC
2
NORM
(.)
50
NORM
a. Adjust the pulse amplitude to 5 volts (10 divisions)
with the Model 2118 ampl itude VE RNIE R.
Figure 5-6. Trigger Output Test Setup
a. Set the Model 2118 controls as follows:
MULTIPLlER
FREQUENCY (Hz)
AMPLITUDE (Switch)
VERNIER
TRIGGER POLARITY
1M
5
5
cw
(-)
b. Set the sampling oscilloscope controls as follows:
T1ME/DIV
MAIN SWEEP MAGNIFIER
MILLIVOLTS/DIV
20 nSEC
2
50
b. Move the leading edge of the pulse to the center of
the CRT. The preshoot and the overshoot of the leading
edge shall be no more than 5 minor divisions (5%).
c. Move the trigger pulse to the center of the CRT. The
pulse amplitude should be 2 volts or more (4 divisions).
c. Move the trailing edge of the pu lse to the center of
the CRT. The preshoot and the overshoot of the trailing
edge of the pulse shall be no more than 5 minor divisions
(5%).
d. Adjust the sampling oscilloscope plug-in unit
VERNIER for full-screen display (10 divisions). Observe
the pulse width at 50% amplitude points. The pulse width
should be approximately 10 ns (1 division).
5-15. SYMMETRY (10 MHz).
e. Change the Model 2118 TRIGGER POLARITY
switch to (+). The pulse should be positive with the same
specifications as in steps c and d above.
a. Set the FREQUENCY (Hz) dial of the Model 2118
to 10 and the SYMMETRY control fully ccw. All other
control settings to remain as in paragraph 5-14.
5-18. ADJUSTM ENTS.
&16. TRIGGER OUTPUT CHECK.
5-19. The Model 2118 Square Wave Generator contains a
number of selected components which are factory
installed. Selected components are indicated in the Parts
List (refer to Section VI) and on the schematics by (*).
Table 5-3 lists the selected components, description,
ranges and the reason and method of selection. If a unit
cannot be adjusted to meet the performance tests after
repair and/or component replacement, check Table 5-3 for
possi ble replacement of a select component.
5-1 7. This procedure verifies the trigger output
characteristics of the Model 2118. Connect the equipment
as shown in Figure 5-6.
5-20. The following are factory adjustments and do not
normally need readjusting. After instrument repair and/or
component replacement, accomplish the performance
b. The pulse width of the period displayed should be
less than 30%.
c. Turn the SYMMETRY control of the Model 2118
fully cwo The pulse width of the period shall be more than
70%.
5-5
Model 2118
Section V
Table 5-3
Table 5-3. Factory Selected Components
Description
Ref.
Desig.
A2C29
A2R9
A2R18 &
A2R48
5-6
C:
C:
C:
C:
C:
C:
C:
Typical 22 pF. Selected to optimize output
pulse shape. Selected with A2R84 (see
elsewhere in this Table).
fxd.22pF
fxd.24pF
fxd.27pF
fxd.30pF
fxd.33pF
fxd.36pF
fxd.39pF
R: fxd. 1300 ohms
R:
R:
R:
R:
R:
fxd.
fxd.
fxd.
fxd.
fxd.
2400
2700
3000
3300
3600
Reason and Method of
Selection
ohms
ohms
ohms
ohms
ohms
Typical 1300 ohms: -20 V adjust is critical
because of high Temp coef of R8, and
its resistance must be kept low. R9 is
also selectable because of VR2.
R18 typical 2400 ohms: -70 V adjust is critical
because of high Temp coef of R17, and
its resistance must be kept low. R18 is
also selected because of V R4.
R48 typical 3300 ohms: Selected for small freq.
change with Symmetry. Set Freq to 10 MHz.
Turn Symmetry control cw to ccw. Monitor
freq with counter. Freq should change
less than ±5%.
Typical 560 ohms: Adjusts the mechanical
potentiometer path of R2 to correspond with
frequency dial.
A2R19
R: fxd. 560 ohms
A2R31
R:
R:
R:
R:
A2R32
R: fxd. 12 ohms
Range 6 ohms to
18 ohms
A2R41
R:
R:
R:
R:
R:
R:
fxd.
fxd.
fxd.
fxd.
fxd.
fxd.
91 kilohms
120 kilohms
150 kilohms
180 kilohms
200 kilohms
220 kilohms
Typical 200 kilohms: Selected for small freq
change with Symmetry. Set Mult. sw. to
10K. Set Freq dial to 1. Turn Symmetry
control cw to ccw. Monitor freq with
counter. Change should be less than ±3%.
A2R84
R:
R:
R:
R:
R:
R:
R:
fxd.
fxd.
fxd.
fxd.
fxd.
fxd.
fxd.
22 ohms
27 ohms
30 ohms
39 ohms
47 ohms
82 ohms
160 ohms
Typical 82 ohms: Selected to optimize output
pulse shape. Selected with A2C29.
fxd.
fxd.
fxd.
fxd.
46
51
56
62
ohms
ohms
ohms
ohms
Typical 56 ohms: Adjust for correct freq. Set
Mult. Sw. to 1 MHz. Set Freq dial to 1.
Adjust C9 for 1 MHz. Set Freq dial to
10. Select R31 for 10 MHz. Recheck C9
setting.
Typical 12 ohms: Selected to meet freq specs
on the lOOK range.
Model211B
Section V
Paragraphs 5-21 and 5-22
checks as outlined in Paragraphs 5-5 through 5-17. If an
instrument does not meet the performance checks,
proceed with the following adjustments. These
adjustments must be performed in the sequence given
below. See Figure 5-7 for locations of adjustments.
5-22. FREQUENCY ADJUSTMENT.
a. Connect the equipment as shown in Figure 5-2.
b. Set the Model 211 B controls as follows:
MULTIPLIER
FREQUENCY (Hz)
SYMMETRY
AMPLITUDE (switch)
VERNIER
5-21. POWER SUPPLY ADJUSTMENT.
a. Use a digital voltmeter to make the following
measurements and adjustments.
b. -20V SUPPLY. Measure from test point TP-20V
on board assembly A2 to chassis. Adjust potentiometer
A2R8 to obtain -20 volts. Vary the line voltage ±10%
about the nominal input voltage. The -20 volts should not
change more than ±200 millivolts.
c. Set the high-frequency oscilloscope controls as
follows:
TIME/DIV
TRIGGER
MODE
VO LTS/D I V (channel A)
POLARITY
COUPLING
VOLTS/DIV (channel B)
COUPLING
c. -70V SUPPLY. Measure from test point TP-70V on
board assembly A2 to chassis. Adjust potentiometer
A2R17 to obtain -70 volts. Vary the line voltage ±10%
about the nominal input voltage. The -70 volts should not
change more than ±700 millivolts.
TP3
RBB
R5?
10K
1
approximately 50%
5
cw
TP2
.1MSEC
INT
NORM
2
(+) UP
DC
.05
AC
TP-20V
I
TPI
TP-?OV
C9
R43
R35
I
R33
R34
R23
R20
RB
RI?
21IB-A-12
Figure 5-7. Component Adjustment Location
5-7
Model 2118
Section V
Paragraphs 5-23 and 5-24
d. Measure the amplitude of the triangular waveform
with the oscilloscope test probe at test point TP1 (located
on board assembly A2). Adjust the amplitude of the
waveform with A2R43 for 1.8 volts. Remove the probe.
e. Set the electronic counter controls as follows:
SIGNAL INPUT
SENSITIVITY (VOLTS RMS)
TIME 8ASE
FUNCTION
AC
1V
1 sec
FREQUENCY
f. Set the FREQUENCY (Hz) dial of the Model 2118
to 10 and adjust A2R23 for 100 KHz ±1% as indicated on
the electronic counter.
g. Set the FREQUENCY (Hz) dial of the Model 2118
to 1 and adjust A2R20 for 10 KHz ±1% as indicated on
the electronic counter.
h. Repeat steps (f) and (g) above if necessary, until
both requirements are met.
i. Set FREQUENCY (Hz) dial of the Model 2118 to 1
and the MULTIPLIER switch to 1M. Adjust capacitor
A2C9 for 1 MHz ±1% as indicated on the electronic
counter.
j. Set the FREQUENCY (Hz) dial of the Model 2118
to 10 and check the frequency. The frequency should be
10 MHz ±4%. If difficulty is encountered, check A2R31
(refer to Table 5-3).
k. Set the electronic counter controls as indicated in
Paragraph 5-&. Set the Model 2118 MULTIPLIER switch
to 100and the FREQUENCY (Hz) dial to 10.
5-8
WARI\JING
I
Potentiometers A2R33, A2R34, and
A2R35 are directly beneath the AC
Power Switch (S1). Extreme care should
be taken when adjusting these resistors
to avoid shock.
I. Adjust A2R35 for 983 usec as indicated on the
electronic counter.
m. Set the Model 2118 MULTIPLIER switch to 10
and adjust A2R34 for 9830 usec as indicated on the
electronic counter.
n. Set the Model 2118 MULTIPLIER switch to 1 and
adjust A2R33 for 98300 usec as indicated on the
electronic counter.
o. Set the Model 2118 FREQUENCY (Hz) dial to 1
and check the 1, 10 and 100 MULTIPLIER ranges. The
time change shall be less than ±5% on each range.
5-23. SYNCHRONIZATION ADJUSTMENT.
a. Measure the voltage at test point TP3 on the board
assembly A2 with the dc voltmeter on the 0.1-volt range.
Adjust A2R57 for an indication of 0 volt.
5-24. PULSE
ADJUSTMENT.
AMPLITUDE
60o-0HM
OUTPUT
a. Connect the equipment as shown in Figure 5-4.
b. Set the Model 2118 MULTIPLIER switch to 10K,
the FREQUENCY (Hz) dial to 10, the SYMMETRY
control to 50% duty cycle, and the AMPLITUDE control
(60o.ohm) fully clockwise. Adjust A2R88 for greatest
amplitude without distortion on the falltime.
Model 211B
Section V
Performance Check Record
PERFORMANCE CHECK RECORD
Serial Number
Reference Standard
Paragraph
Reference
Check
5-8
Frequ ency Check
5-9
Symmetry Control Check
5-10
-~
-_.-
................
~75%
Duty Cycle Symmetry - CCW
~25%
-_._..._..
50% duty cycle
_
~--
Synchronization Check
0
0
2
See Table 5-2
Duty Cycle Symmetry - CW
180 Phase shift - CW
w
Actual
Required
180 Phase shift - CCW
•....., •..,•.• ,....,---•.,.,,=--......-.
50% duty cycle
..J
,
o
5-11
600-ohm Output
w
lI-
600-ohm output
Voltage - no load
e
o
t.7
600-ohm output
Voltage - load
2
e..J
'd:
5-12
I:J
(.)
5-13
~60V
~30V
Risetime and Falltime
600-ohm output
Risetime (no load)
< 140 ns
Falltime (no load)
< 140 ns
Risetime (load)
< 70 ns
Falltime (load)
< 70 ns
-------
50-Ohm Output Check
Risetime (load)
< 5 ns
Falltime (load)
< 5 ns
Preshoot (leading edge)
~5%
Overshoot (leading edge)
~5%
Preshoot (trailing edge)
~5%
Overshoot (trailing edge)
~5%
5-8a
Model 211 B
Section V
Performance Check Record
Reference Standard
Paragraph
Reference
5-14
Check
Required
Actual
Symmetry -10 MHz
5-15
< 30%
Symmetry Control - ccw
Duty Cycle
Symmetry Control - cw
Duty Cycle> 70%
Trigger Output Check
Amplitude (-) pulse
> 2 volts
Pulse width -50% amplitude
10 ns
Amplitude (+) pulse
> 2 volts
Pulse width - 50% amplitude
10 ns Ref.
-~._-
n
c:
-t
»
r-
o
Comments:
Z
C)
o
o
-t
-t
m
o
rZ
m
5-8b
Section VI
Paragraphs 6-1 to 6-7
Model 211 B
SECTION VI
REPLACEABLE PARTS
6-1.
INTRODUCTIOI\l.
specifications more rigid than the manufacturer's standard
specifications. These parts must be ordered directly from
Hewlett-Packard Company. Information concerning
standard replaceable parts will be supplied upon request to
allow procurement directly from the manufacturers.
Contact the local HP Sales/Service Office for details.
6-2. This section contains information for ordering
replacement parts. Table 6-2 lists the parts in
a I phanu meric order by reference designation. All
chassis-mounted parts (assemblies and parts not mounted
on assemblies) appear first, followed by each assembly
with sub-assemblies (if any) and components mounted on
that assembly. Reference designations for groups of
identical items may be shown as TP1 - TP9 followed by a
single part number and description indicating that TP1
through TP9 are separate but identical parts.
6-6. To obtain replacement parts from HP, address order
or inquiry to the nearest Hewlett-Packard Sales/Service
Office (names and addresses in rear of manual), and supply
the following information:
a. HP Part number of item(s).
b. Model number and
instrument.
6-3. Parts consisting of several smaller, yet separately
replaceable parts such as jacks or relays have all sub-parts
listed so that partial replacement of these items can be
accomplished. Miscellaneous parts which are not assigned
reference designations appear at the end of the chassis
parts listing and at the end of each assembly listing.
6-4.
nine-digit
serial number of
c. Quantity of part(s) desired.
6-7. To order a part not listed in the table",provide the
following information:
a. Model number and nine-digit serial number of the
instrument.
b. Description of the part including function and
location in the instrument.
ORDERING INFORMATION.
6-5. Many parts used in Hewlett-Packard equipment are
manufactured by HP or are selected by HP under
Table 6-1. Reference Designators and Abbreviations
REFERENCE DESIGNATORS
A
AT
B
C
CP
CR
DL
DS
= assembly
::: attenuatar,
resistive termination
= motor, fun
::: capacitor
= coupling
= diodc
= delay line
= dcvice signaling (lamp)
E
F
FL
H
Ie
.1
K
L
LS
:. misc. electronic part
= [use
= fillct'
::: hardware
::: integrated circuit
= jack
= rclay
::: inductor
= speakcr
M
MP
I'
PS
Q
R
RT
S
T
:::
:::
:::
:::
:::
:::
:::
:::
:::
meter
mechanical part
plug
power supply
transistor
resistor
thermistor
switch
transformer
TB
TP
U
V
:::
:::
:::
:::
terminal board
test point
microcircuit{non-repairable)
vacuum tube, neon bulb,
photocell, etc.
voltage regulator (diode)
cable
socket
crystal
VR
=
W
X
Y
:::
s-b
Se
sect
semicon
Si
sil
sl
sp
spl
st
std
::: slow-blow
= selenium
= section(s)
= semiconductor(s)
= silicon
= silver
= slide
= single pole
= special
= single throw
= standard
Ta
td
TD
tgl
Ti
tol
trim.
= tantalum
u
= micro
V
val'
= variable
=
=
ABBREVIATIONS
A
ampl
assy
= ampere(s)
= amplifier(s)
= assembly
bd
bp
c
car.
ccw
cer
coax.
coef
com
comp
conn
CRT
cw
d
dcpc
dp
dt
elect.
encap
ext
F
fet
fxd
Gc
G
gl
grd
:::
= l'il'a (10 )
= gla,s
= ground(ed)
minat
mom.
mtg
my.
::: miniature
::: momentary
= mounting
= mylar
= bandpass
H
= hcnry(ics)
n
= nano
= centi (10- 2)
= carbon
= counterclockwise
= ceramic
= coaxial
= coeffic ient
= common
= composition
= connector(s)
= cathode- ray tu be
= clockwise
= deci (10- 1)
Hg
~
board(s)
= deposited
~
electrolytic
= encapsulated
= external
= farad(s)
= field-effect
fixed
if.
impp;
ined
incl
lns
int
= hOllr(s)
= Hewlell- Packa rd
= hertz
= intermediate
npo
nsr
= not
Clbd
ox
= order by description
Nc
nlo
= incandescent
= inciude(s)
~
in,ulation(eci)
= internal
3
Ib
lev
lin
log.
Ipf
= pound(s)
(10 )
= lever
= linear
taper
= logarithmic
~
~
taper
low-pass filler(s)
milli (10 ~3)
(10 )
film
metox = metal oxide
= mega
M
metfim = metal
9
(10- )
= normally closed
= neon
= normally open
= negative positive zero
n/c
freCj
= impregnated
= kito
m
transistor(s)
= mercu ry
k
carbon
= dou ble pole
= double throw
~
hI'
HI'
Hz
gcrnlal11~m
P
pc
PGM
piv
plo
poly
pore
pos
pot.
pk-pk
rect
rf
(zero temperature
coefficicnt)
separately
replac eable
= oxide
12
= pico (10- )
= printed (etched) circuit(s)
= program
=peak inverse voltage(s)
= part of
= polysty rcne
= porcelain
= position(s)
= potentiometer(s)
= peak-to-peak
= rectifier(s)
= radio frequency
W
wi
wlo
wVdc
ww
= time delay
= tunnel diode(s)
= togglc
= titanium
= tolerance
= trimmer
6
(10- )
= voll(s)
= wall(s)
= with
= wiUlOut
= dc working voll(s)
= wirewound
6-1
Section VI
Table 6-2
Ref
Desig
Model 21'IB
Table 6-2. Replaceable Parts
HP Part No.
Description
(See Table 6-1.)
TQ
CHASSIS
C1
C2
C3
018Q.0047
018Q.0214
015Q.0093
DS1
6-2
1
1
7
C: fxd elect. 500 uF 75 wVdc
C: fxd elect, 275 uF -10% +50% 200 wVdc
C: fxd cer 0,01 uF +80% -20% 100 wVdc
1
DS: p/o S1
E1
E2
E3
120Q.0081
120Q.0043
1200-0077
4
2
2
E: Bushing, transistor
E: Insulator 0
E: Insulator 0
F1
211Q.0008
211Q.0018
1
1
F: Cart, sob 1/2A 125V
F: Cart, sob 1/2A (230V operation)
H1
H2
504Q.0700
0360-0037
2
2
H: Hinge
H: lug, solder
J1
J2
J3
J4
J5
1251-0148
125Q.0083
125Q.0083
125Q.0140
125Q.0083
1
3
J:
J:
J:
J:
J:
MP1
MP2
MP3
MP4
MP5
120Q.0063
5000-0717
500Q.0567
506Q.0718
7100-0389
2
1
2
1
1
MP:
MP:
MP:
MP:
MP:
clip, transistor 03 and 04
cover, bottom
cover, side, perforated
cover top
cover, transformer T1
MP6
MP7
MP8
MP9
MP10
3130-0038
1205-0008
00211-64001
0370-0077
037Q.0084
1
2
1
1
2
MP:
MP:
MP:
MP:
MP:
coupler, switch, .045 diam
Dissipator, Heat, 03 and 04
Knob assy
Knob, blk w/arrow (Ampl 50-ohm)
Knob, blk w/arrow (Ampl 600-ohm; Vernier)
MP11
MP12
MP13
MP14
MP15
037Q.0099
037Q.0134
1205-0007
090Q.0016
1490-0032
1
1
2
1
1
MP:
MP:
MP:
MP:
MP:
Knob, round (Multiplier)
Knob, red (Symmetry)
Nut, dissipator, heat, 03 and 04
0 ring, rubber
Stand, tilt
01
02
03
04
185Q.0098
1850-0098
1854-0090
1854-0090
2
0:
0:
0:
0:
Ge pnp
Ge pnp
Si npn
Si npn
R1
R2
R3
R4
R5
R6
0757-0092
2100-0535
210Q.0519
2100-0036
0683-2035
210Q.0075
1
1
1
1
1
1
R:
R:
R:
R:
R:
R:
fxd metox 33 kilohms 2% 1/2W
var 10 kilohms 10% 2W
var 2 x 1000 ohms 3%
var 1000 ohms 20% 1/2W
fxd comp 20 kilohms 5% 1/4W
var 2 x 1200 ohms 10%
1
2
Conn
Conn
Conn
Conn
Conn
ac pwr
BNC
BNC
BNC
BNC
Model 2118
Section VI
Table 6-2
Table 6-2. Replaceable Parts (Cont'd)
Ref
Dcsig
HP Part No.
Description
(See Table 6-1.)
TQ
CHASSIS (CONT'D)
S1
S2
S3
S4
S5
3101·0100
3100-0033
3101-0011
3100-0507
1
1
1
1
1
'S:
S:
S:
S:
S:
push, SPDT 5A, 125V
slide, DPDT, non-shocking, .5A, 125V
p/o S5
slide, non-shorting, .5A, 125V
rotary
T1
9100-0517
1
T: transformer, power
W1
8120-0078
1
W: Cable assy, input power
XF1
1400-0084
1
XF: extractor, post-type
A1
A1
00211-63401
1
A: Attenuator assy
A1R1
A1R2
A1R3
A1R4
A1R5
0757-0172
0757-0801
0757-0801
0757-0069
0757-0795
1
2
R:
R:
R:
R:
R:
fxd
fxd
fxd
fxd
fxd
metflm
metflm
metflm
metflm
metflm
A1R6
A1R7
A1R8
A1R9
0757-0795
0757-0071
0757-1005
0757-1005
1
2
R:
R:
R:
R:
fxd
fxd
fxd
fxd
metflm75 ohms 1% 1/2W
metflm 247.5 ohms 1% 1/2W
metflm 61.11 ohms 1/4% 1/2W
metflm 61.11 ohms 1/4% 1/2W
1
S: Switch NSR Part of A 1 assembly
1
1
W: Cable assembly input
W: Cable assembly output
A1S1
A1W1
A1W2
00211-61606
00211-61607
1
2
37.4 ohms 1% 1/2W
150 ohms 1% 1/2W
150 ohms 1% 1/2W
121 ohms 1% 1/4W
75 ohms 1% 1/2W
A2
00211·66501
1
A: Printed Circuit Board
A2C1
A2C2
A2C3
A2C4
A2C5
0180-0049
0180-0049
0180-0291
0150-0121
0180-0049
3
C:
C:
C:
C:
C:
fxd
fxd
fxd
fxd
fxd
A2C6
A2C7
A2C8
A2C9
A2C10
0150·0096
0180-0291
0140-0194
0121·0046
0140-0147
C:
C:
C:
C:
C:
fxd cer 0.05 uF 20% 100 wVdc
fxd Ta 1 uF 10% 35 wVdc
fxd mica 110 pF 5% 300 wVdc
var cer 9-35 pF
fxd mica 180 pF 5% 500 wVdc
A2
I
9
1
1
1
1
1
Alum 20 uF -10+75% 50 wVdc
Alum 20 uF -10+75% 50 wVdc
Ta 1 uF 10% 35 wVdc
cer 0.1 uF ·20% +80% 50 wVdc
Alum 20 uF -10+75% 50 wVdc
6·3
Model 2118
Section VI
Table 6-2
Ref
Desig
Table 6·2. Replaceable Parts (Cont'd)
HP Part No.
Description
(See Table 6-1.)
TQ
A2 (CONT'D)
NOTE:
6-4
(*) indicates selected value.
C:
C:
C:
C:
C:
fxd
fxd
fxd
fxd
fxd
Ta 100 uF 20% 10 wVdc
Ta 10 uF 10% 20 wVdc
Ta 1 uF 10% 35 wVdc
polycarb 0.22 uF 2% 160 wVdc
polycarb 22 n~ 1% 400 wVdc
C:
C:
C:
C:
C:
fxd mica 2000 pF 2% 300 wVdc
fxd cer 0.01 uF -20% +80% 100 wVdc
fxd Alum. 100 uF -10+75% 25 wVdc
fxd cer 400 pF 5% 500 wVdc
fxd Ta 1 uF 10% 35 wVdc
C:
C:
C:
C:
C:
fxd
fxd
fxd
fxd
fxd
Ta 1 uF 10% 35 wVdc
Alum 100 uF -10+75% 25 wVdc
Alum 100 uF -10+75% 25 wVdc
cer 0.01 uF -20% +80% 100 wVdc
Ta 1 uF 10% 35 wVdc
C:
C:
C:
C:
C:
fxd
fxd
fxd
fxd
fxd
mica 12 pF 5% 500 wVdc
cer 15 pF 5% 500 wVdc
cer 0.01 uF -20% +80% 100 wVdc
mica 22 pF 5% 500 wVdc
Ta 1 uF 10% 35 wVdc
C:
C:
C:
C:
C:
fxd
fxd
fxd
fxd
fxd
Ta 1 uF 10% 35 wVdc
Ta 1 uF 10% 35 wVdc
cer 0.01 uF -20% +80% 100 wVdc
cer 0.01 uF -20% +80% 100 wVdc
Alum 10 uF -10+50% 100 wVdc
A2C11
A2C12
A2C13
A2C14
A2C15
0180-0137
0180-0374
0180-0291
0160-0503
0160-0504
1
1
A2C16
A2C17
A2C18
A2C19
A2C20
0140·0180
0150-0093
0180-0094
0150-0071
0180-0291
1
A2C21
A2C22
A2C23
A2C24
A2C25
0180-0291
0180-0094
0180-0094
0150-0093
0180-0291
A2C26
A2C27
A2C28
A2C29*
A2C30
0140-0201
0150-0064
0150-0093
0140-0145
0180-0291
A2C31
A2C32
A2C33
A2C34
A2C35
0180-0291
0180-0291
0150-0093
0150-0093
0180-0091
A2C36
A2C37
A2C38
0150-0079
0150-0079
0150-0093
2
C: fxd cer 3.3 nF 10% 500 wVdc
C: fxd cer 3.3 nF 10% 500 wVdc
C: fxd cer 0.01 uF -20% +80% 100 wVdc
A2CR1
A2CR2
A2CR3
A2CR4
A2CR5
1901-0158
1901-0158
1901-0158
1901-0158
1901-0029
4
CR:
CR:
CR:
CR:
CR:
Si
Si
Si
Si
Si
A2CR6
A2CR7
A2CR8
A2CR9
A2CR10
1901-0029
1901·0029
1901-0029
1901-0025
1901-0025
CR:
CR:
CR:
CR:
CR:
Si
Si
Si
Si
Si
A2CR11
A2CR12
A2CR13
A2CR14
A2CR15
1901·0040
1901-0040
1910-0016
1910-0016
1910-0016
1
1
3
1
1
1
1
1
4
2
6
4
CR: Si
CR: Si
CR:Ge
CR:Ge
CR:Ge
Model 211 B
Table 6-2. Replaceable Parts (Cont'd)
Ref
Desig
HP Part No.
Section VI
Table 6-2
Description
(See Table 6-1.)
TQ
A2 (CONT'D)
A2CR16
A2CR17
A2CR18
A2CR19
A2CR20
A2CR21
1910-0016
1901-0040
1901-0040
1901-0040
1901-0040
1901-0050
A2L1
A2L2
A2L3
A2L4
A2L5
9140-0111
9170-0016
9140-0096
9170-0016
9170-0016
A2L6
A2L7
A2L8
A2L9
9170-0016
9170-0016
9170-0016
9170-0016
A2Q1
A2Q2
A2Q3
A2Q4
A2Q5
1853-0029
1853-0029
1853-0001
1853-0029
1854-0071
4
A2Q6
A2Q7
A2Q8
A2Q9
A2Q10
1854-0019
1853-0009
1854-0019
1853-0009
1853-0029
8
5
A2Q11
A2Q12
A2Q13
A2Q14
A2Q15
1854-0071
1854-0019
1854-0019
1854-0009
1854·0009
A2Q16
A2Q17
A2Q18
A2Q19
A2Q20
1854-0005
1854-0005
1853-0009
1854-0005
1854-0005
A2Q21
A2Q22
A2Q23
A2Q24
A2Q25
1854-0019
1854-0019
1853-0009
1853-0009
1854-0019
1
1
7
1
2
3
2
4
CR:Ge
CR: Si
CR: Si
CR: Si
CR: Si
CR: Si
L:
L:
L:
L:
L:
fxd rf 3.3 uH
Bead, ferrite
fxd rf 1 uH
Bead, ferrite
Bead, ferrite
L:
L:
L:
L:
Bead,
Bead,
Bead,
Bead,
Q:
Q:
Q:
Q:
Q:
Si
Si
Si
Si
Si
pnp
pnp
pnp
pnp
npn
Q:
Q:
Q:
Q:
Q:
Si
Si
Si
Si
Si
npn
pnp
npn
pnp
pnp
Q:
Q:
Q:
Q:
Q:
Si
Si
Si
Si
Si
npn
npn
npn
npn 2N709
npn 2N709
Q:
Q:
Q:
Q:
Q:
Si
Si
Si
Si
Si
npn
npn
pnp
npn
npn
Q:
Q:
Q:
Q:
Q:
Si
Si
Si
Si
Si
npn
npn
pnp
pnp
npn
ferrite
ferrite
ferrite
ferrite
2N708
2N708
2N708
2N708
I
6-5
Model 2118
Section VI
Table 6-2
Ref
Dcsig
Table 6-2. Replaceable Parts (Cont'd)
HP Part No.
Description
(See Table 6-1.)
TQ
A2 (CONT'D)
NOTE: (*) indicates selected value.
6-6
1
A2Q26
A2Q27
A2Q28
A2Q29
A2Q30
1853-0012
1854-0071
1853-0001
1854-0267
1854-0267
A2Q31
A2Q32
A2Q33
1854-0019
1854-0091
1854-0091
A2R1
A2R2
A2R3
A2R4
A2R5
0758-0003
0757-0080
0758-0003
0813-0050
0813-0050
8
3
A2R6
A2R7
ALR8
A2R9*
A2Rl0
0758-0004
0758-0034
2100-0520
0758-0042
0761-0005
A2Rll
A2R12
A2R13
A2R14
A2R15
0812-0012
0758-0048
0758·0008
0758-0028
0758-0006
A2R16
A2R17
A2R18*
A2R19*
A2R20
0757-0080
2100-0520
0758-0034
0758-0028
2100-0520
A2R21
A2R22
A2R23
A2R24
A2R25
0683-1025
0758-0018
2100-0521
0757-0159
0757·0159
A2R26
A2R27
A2R28
A2R29
A2R30
0758-0028
0758-0028
0758-0028
0758-0028
0758-0035
A2R31*
A2R32
A2R33
A2R34
A2R35
0758·0093
0683-1205
2100-0521
2100-0521
2100-0521
2
2
Q:
Q:
Q:
Q:
Q:
Si
Si
Si
Si
Si
pnp 2N2904A
npn
pnp
npn
npn
,
Q: Si npn
Q: Si npn
Q: Si npn
R:
R:
R:
R:
R:
fxd
fxd
fxd
fxd
fxd
1
2
5
1
1
R:
R:
R:
R:
R:
fxd metox 2700 ohms 5%
fxd metox 2400 ohms 5%
var 250 ohms 20% 1/8W
fxd metox 1300 ohms 5%
fxd metox 2200 ohms 5%
1
1
3
6
3
R:
R:
R:
R:
R:
fxd
fxd
fxd
fxd
fxd
R:
R:
R:
R:
R:
fxd metox 4700 ohms 5% 1/2W
var 250 ohms 20% 1/8W
fxd metox 2400 ohms 5% l/2W
fxd metox 270 ohms 5% 1/2W
var 250 ohms 20% 1/8W
R:
R:
R:
R:
R:
fxd metox 1000 ohms 5%
fxd metox 15 kilohms 5%
var 5000 ohms 30% 1/8W
fxd metox 1000 ohms 1%
fxd metox 1000 ohms 1%
R:
R:
R:
R:
R:
fxd
fxd
fxd
fxd
fxd
2
2
1
5
2
2
1
1
metox 1000 ohms 5% l/2W
metox 4700 ohms 5% 1/2W
metox 1000 ohms 5% 1/2W
ww 100 ohms 5% 3W
ww 100 ohms 5% 3W
1/2w
1/2W
1/2W
lW
ww 18 ohms 5% 3W
metox 8200 ohms 5% 1/2W
metox 390 ohms 5% 1/2W
metox 270 ohms 5% l/2W
metox 10 kilohms 5% 1/2W
metox
metox
metox
metox
metox
1/4W
1/2W
1/2W
1/2W
270 ohms 5% 1/2W
270 ohms 5% 1/2W
270 ohms 5% 1/2W
270 ohms 5% 1/2W
3000 ohms 5% 1/2W
R: fxd metox 56 ohms 5% 1/2W
R: fxd comp 12 ohms 5% 1/4W
R: var 5000 ohms 30% 1/8W
R: var 5000 ohms 30% 1/8W
R: var 5000 ohms 30% 1/8W
Section VI
Table 6-2
Model 211B
Table 6·2. Replaceable Parts (Cont'd)
Ref
Desig
HP Part No.
Description
(See Table 6-1.)
TQ
A2 (CONT'D)
NOTE: (*) indicates selected value.
R:
R:
R:
R:
R:
fxd
fxd
fxd
fxd
fxd
1
1
R:
R:
R:
R:
R:
fxd metox 200 kilohms 5% 1/2W
fxd metox 390 ohms 5% 1/2W
var 250 ohms 20% 1/8W
fxd metox 430 ohms 5% 1/2W
fxd metox 130 ohms 5% 1/2W
1
1
2
2
3
R:
R:
R:
R:
R:
fxd
fxd
fxd
fxd
fxd
metox
metox
metox
metox
metox
27 ohms 5% 1/2W
91 ohms 5% 1/2W
3300 ohms 5% 1/2W
560 ohms 2% 1/2W
150 ohms 5% 1/2W
2
1
R:
R:
R:
R:
R:
fxd
fxd
fxd
fxd
fxd
metox
metox
metox
metox
metox
4700 ohms 5% 1/2W
30 ohms 5% 1/2W
51 ohms 5% 1/2W
51 ohms 5% 1/2W
820 ohms 5% 1/2W
1
2
R:
R:
R:
R:
R:
fxd metox 10 kilohms 5%
var 5000 ohms 30% 1/8W
fxd metox 3300 ohms 5%
fxd metox 13 kilohms 5%
fxd metox 1800 ohms 5%
R:
R:
R:
R:
R:
fxd
fxd
fxd
fxd
fxd
metox
metox
metox
metox
metox
3900 ohms 5% 1/2W
22 ohms 5% 1/2W
560 ohms 2% 1/2W
1000 ohms 5% 1/2W
2200 ohms 5% 1/4W
1
R:
R:
R:
R:
R:
fxd
fxd
fxd
fxd
fxd
metox
metox
metox
metox
metox
1000 ohms 5% 1/2W
30 ohms 5% 1/2W
1000 ohms 5% 1!2W
30 ohms 5% 1/2W
100 ohms 5% 1/2W
1
R:
R:
R:
R:
R:
fxd
fxd
fxd
fxd
fxd
metox
metox
metox
metox
metox
3000 ohms 5% 1/2W
390 ohms 5% 1/2W
1800 ohms 5% 1/2W
1000 ohms 5% 1/2W
470 ohms 5% 1/2W
A2R36
A2R37
A2R38
A2R39
A2R40
0758-0007
0758-0044
0761-0057
0758-0071
0758-0057
A2R41 *
A2R42
A2R43
A2R44
A2R45
0758-0129
0758-0008
2100-0520
0757-0074
0758-0082
1
A2R46
A2R47
A2R48*
A2R49
A2R50
0698-5886
0758-0041
0758-0010
0757-0076
0758-0007
A2R51
A2R52
A2R53
A2R54
A2R55
0757-0080
0698-5887
0757-0086
0757-0086
0758-0032
A2R56
A2R57
A2R58
A2R59
A2R60
0758-0006
2100-0521
0758-0010
0758-0078
0758-0043
A2R61
A2R62
A2R63
A2R64
A2R65
0758-0045
0698-5884
0757-0076
0758-0003
0683-2225
A2R66
A2R67
A2R68
A2R69
A2R70
0758-0003
0698-5887
0758-0003
0698-5887
0758-0024
A2R71
A2R72
A2R73
A2R74
A2R75*
0758-0035
0758-0008
0758-0043
0758-0003
0758-0029
A2R76
A2R77
A2R78
0758-0044
0758-0003
0683-1025
3
1
1
1
1
2
1
3
metox
metox
metox
metox
metox
150 ohms 5% 1/2W
2200 ohms 5% 1/2W
560 ohm 5% 1W
4300 ohms 5% 1/2W
5600 ohms 5% 1/2W
1/2W
1/2W
1/2W
1/2W
R: fxd metox 2200 ohms 5% 1/2W
R: fxd metox 1000 ohms 5% 1/2W
R: fxd metox 1000 ohms 5% 1/4W
6-7
Section VI
Table 6-2
Ref
Desig
Model 211B
Table 6-2. Replaceable Parts (Cont'd)
HP Part No.
Description
(See Table 6-1.)
TQ
A2 (CONT'D)
NOTE: (*) indicates selected value.
6-8
1
1
R: fxd metox 110 ohms 5% 1/2W
R: fxd metox 120 ohms 5% 1/2W
A2R79
A2R80
0758-0096
0757-0171
A2R81
A2R82
A2R83
A2R84*
A2R85
0758-0044
0761-0041
0761-0041
0758-0026
0757-0198
A2R86
A2R87
A2R88
A2R89
A2R90
0757-0198
0758-0015
2100-0520
0758-0003
0758-0073
A2R91
A2R92
A2R93
A2R94
A2R95
0758-0006
0758-0031
0698-5137
0698-5890
0698-5890
A2R96
A2R97
0758-0007
0758-0012
1
R: fxd metox 150 ohms 5% 1/2W
R: fxd metox 12 kilohms 5% 1/2W
A2RT1
A2RT2
0837-0502
0837-0501
1
1
RT: Thermistor 130 ohms 20% 1/2W
RT: Thermistor 50 ohms 20% 1W
A2VR1
A2VR2
A2VR3
A2VR4
A2VR5
1902-0048
1902-0048
1902-3256
1902-3256
1902-0074
3
CR: Brkdwn 6.81V 5% 400 mW
CR: Brkdwn 6.81V 5% 400 mW
CR: Brkdwn 23.7V 5% 400 mW
A2VR6
A2VR7
A2VR8
A2VR9
A2VR10
1902-0048
1902-0188
1902-3125
1902-3105
1902-0173
2
1
2
1
1
1
1
2
2
R:
R:
R:
R:
R:
fxd
fxd
fxd
fxd
fxd
metox
metox
metox
metox
metox
2200 ohms 5% 1/2W
56 ohms 5% 1W
56 ohms 5% 1W
82 ohms 5% 1/2W
100 ohms 1% 1/2W
R:
R:
R:
R:
R:
fxd metox 100 ohms 1% 1/2W
fxd metox 220 ohms 5% 1/2W
var 250 ohms 20% 1/8W
fxd metox 1000 ohms 5% 1/2W
fxd metox 24 kilohms 5% 1/2W
R:
R:
R:
R:
R:
fxd
fxd
fxd
fxd
fxd
metox 10 kilohms 5% 1/2W
metox 680 ohms 5% 1/2W
metox 47 ohms 5% 1/2W
metox 39 ohms 5% 1/2W
metox 39 ohms 5% 1/2W
CR:B~dwn23~V5%400mW
1
CR: Brkdwn 7.15V 5% 400 mW
1
1
1
1
CR:
CR:
CR:
CR:
CR:
Brkdwn
Brkdwn
Brkdwn
Brkdwn
Brkdwn
6.81V
4.12V
6.98V
5.62V
9.53V
5%
5%
2%
2%
5%
400
400
400
400
400
mW
mW
mW
mW
mW
Model 2118
Section VII
Paragraphs 7-1 to 7-8
SECTION VII
MANUAL CHANGES AND OPTIONS
7-1.
MANUAL CHANGES.
7-2. This manual applies directly to the standard Model
2118 having a serial prefix as listed on the title page of
this manual. The following paragraphs provide instructions
for modify ing the manual to cover older instruments.
Refer to the separate MANUAL CHANGES sheet supplied
with this manual for newer instruments and errata.
7-3.
OLDER INSTRUMENTS.
7-4. Table 7-1 lists the changes required to adapt this
manual to an older instrument. Check Table 7-1 for the
proper instrument serial prefix and make the changes
indicated. Note that these changes adapt the manual to
cover a particular instrument as manufactured and do not
apply to an instrument subsequently modified in the field.
7-5.
7-7.
SPECIAL INSTRUMENTS.
7-8. Modified versions (per customer's specifications) of
any HP instrument are available on special order. The
manual for these special instruments (having electrical
modifications) will include a separate insert sheet that
describes the modification and any special manual changes
in addition to the MANUAL CHANGES sheet (if
applicable). Contact the nearest HP Sales/Service Office if
either of these sheets is missing from the manual of a
special instrument by its full specification name and
number.
Table 7-1 Manual Changes
Serial Prefix
Make Changes
OPTIONS.
7-6. Options for an HP instrument are standard
modifications installed at the factory. At the present time,
no options are offered for the Model 2118.
7-1
Model 2118
Section V III
Table 8-1
Table 8-1. Schematic Notes
Refer to MIL-STD-15-1A for schematic symbols not listed in this table.
Etched circuit board
Field effect transistor
(N -channel)
Front panel marking
~---..,
Breakdown diode
I
Rear panel marking
0---
Front panel control
Tunnel diode
Screwdriver adjustment
Step recovery diode
I
-t
~
PIC
Part of
cw
Clockwise end of variable resistor
I
.\
;:
-.a.,
fJo'
--n- J
'-'"
I
No connection
N C
...~
Circuits or components drawn
with dashed lines (phantom) show
function only and are not intended
to be complete. The circuit or
component. is shown in detail on
another schematic.
Unless otherwise indicated:
resistance in ohms
capacitance in picofarads
inductance in microhenries
Waveform test point
(with number)
Common electrical point
(with letter) not necessarily
ground
Single pin connector on board
>-
Pin of a plug-in board
(with letter or number)
Main signal path
Wire colors are given by
numbers in parentheses
using the resistor color code
[ (925) is wht-red-grn
].
o - Black
5 - Green
1 - Brown
6 - Blue
2 - Red
7 - Violet
3 - Orange
8 - Gray
4 - Yellow
9 - White
Switch wafers are identified
as follows:
IR
Primary feedback path
Secondary feedback path
*
8-0
Optimum value selected
at factory, average
value shown; part may
have been omitted.
2R
2R
Model 211B
Section VIII
Paragra phs 8-1 to 8-16
SECTION VIII
SCHEMATICS AND TROUBLESHOOTING
8-1.
INTRODUCTION.
8-2. This section contains schematics, repair and
re p Iace ment information, component identification
illustrations and troubleshooting tips. Figures 8-1 through
8-4 provide a guide to locating common problems. Table
8-1 defines symbols and conventions used on the
schematics.
8-3.
REFERENCE DESIGNATIONS.
8-4. The unit system of reference designations used in
this manual is in accordance with the provisions of the
USA Standard document USAS Y32.16, dated March,
1968. Minor variations due to design and manufacturing
practices not specifically covered by the standard may be
noted.
8-5. Each electrical component is identified by a class
letter and number. This letter-number combination is the
basic designation for each component. Components which
are separately replaceable and are part of an assembly
have, in addition to the basic designation, a prefix
designation indicating the assembly on which the
component is physically located. Components not located
on an assembly will have only the basic designation and
are listed in the replaceable parts list (Section VI) under
Chassis Parts.
replacement parts. If satisfactory repair cannot be made,
contact the nearest Hewlett-Packard Sales/Service Office
(address at rear of manual). If shipment for repair is
recommended, refer to Section II for repackaging and
shipping instructions.
8-11. SERVICING ETCHED CIRCUIT BOARDS.
8-12. The Model 211 B has the plated-through type etched
circuit boards. When servicing this type of board,
components may be removed or replaced by unsoldering
from either side of the board. When removing large
components such as potentiometers, rotate the soldering
iron tip from lead to lead while applying pressure to the
part to lift it from the board. HP Service Note M-20D
contains additional information on the repair of etched
circuit boards. The important considerations are as
follows:
a. Do not apply excessive heat.
b. Apply heat to component lead and remove lead with
a straight pull away from the board.
c. Use a toothpick or wooden splinter to clean hole.
d. Do not force leads of replacement components into
holes.
8-6. All components within the shaded areas on the
schematics are physically located on etched circuit boards
and should be prefixed with the assembly number assigned
to the particular board (e.g., resistor R23 on assembly A2
is referred to as A2R23). There may also be an R23 on
several other assemblies but the assembly designation will
always be different (A3R23, A9R23, etc).
8-13. If the plated metal surface (conductor) lifts from
the board, it may be cemented back with a quick-drying
acetate-base cement (used sparingly) having good
insulating properties. An alternate method of repair is to
solder a good conducting wire along the damaged area.
8-7.
8-15. The most important prerequisite for successful
troubleshooting is an understanding of how the instrument
is designed to operate and correct usage of front-panel
controls. Often suspected malfunctions are caused by
improper control settings. Operation Section 'II which
provides an explanation of controls and connectors and
general operating considerations, and Principles of
Operation Section IV which explains circuit theory are
intended to satisfy this information requirement.
COMPONENT IDENTIFICATION.
8-& Locations of components on etched circuit boards
are illustrated in photographs adjacent to the schematics.
Since the schematics are drawn to show function, a
particular etched circuit board assembly may be shown on
several schematics. The component-identification
photograph is located next to the schematic that shows
most of the circuitry. Components located on the chassis
are identified in Figure 8-5 and Figure 8-6.
8-9.
REPAIR AND REPLACEMENT.
8-10. Most electrical components are accessible from the
component side of the etched circuit board. Section VI
provides a detailed parts list for use in ordering
8-14. TROUBLESHOOTING.
8-16. After ensuring that the malfunction is not the result
of improper control settings,proceed as follows:
a. Visually inspect the instrument for loose or broken
wires, charred or discolored components and any other
indications of physical damage.
8-1
Model 2118
Section VIII
Paragraphs 8-17 to 8-20
b. Use the troubleshooting trees and waveform chart in
conjunction with schematics to isolate the malfunctioning
component.
8-17. FREQUENCY CONTROL NETWORK. When the
frequency control network fails to free-run, there are no
waveforms to monitor. and the oscilloscope cannot be
used as a troubleshooting instrument. The most effective
method of troubleshooting the frequency control network
in this condition is to determine which of the two states
the Schmitt trigger is in and measure the dc voltages
around the circu its. Table 8-2 lists the voltages of the
frequency control circuits with the Schmitt trigger locked
in one condition (either Q14 or Q15 emitter opened).
When an erroneous voltage is located. basic
troubleshooting procedures should be used to determine
the exact cause.
8-18. D.C. VOLTAGES. DC voltages are indicated on
some of the schematics for active components (transistors.
etc). Control test conditions for making the voltage
measurements are listed adjacent to each schematic. Since
the conditions for making these measurements may differ
8-2
from one circuit to another, always check the specific
conditions listed adjacent to the schematic.
8-19. WAVEFOR MS. Typical waveform measurement
points ("V with a number enclosed) are placed on the
schematics along main signal paths. The numbers inside
the measurement point symbols ("V) are keyed to
corresponding waveforms adjacent to each schematic.
Note
Test points are also shown on the
schematics with this symbol (TP @).
Test points correspond to pins
protruding from the etched circuit board
and do not necessarily correspond to
waveform measurement points.
8-20. Conditions for making the waveform measurements
are also listed adjacent to each schematic and like the dc
voltage measurement conditions may vary slightly from
one circuit to another.
Model 2118
TROUBLESHOOTING PULSE GENERATOR
I
NO OR IMPROPER 600n
OUTPUT (Son OK)
(SEE FIGURE 8-4)
NO OR I MPROPER son
AND 600n OUTPUTS
FAULTY TRIGGER PULSE
OUTPUT-CHECK son
AND 600n OUTPUTS
NO OR I MPROPER son
OUTPUT(600n OK)
(SEE FIGURE 8-4)
Ir-----I-I
POWER LIGHT ON
CHECK ALL OTHER
MULTIPLIER RINGS
POWER LIGHT OFF
CHECK FUSE.
CORD, PWR SOURCE,
POWER LIGHT
I
I
BAD
(NO OUTPUTS)
CHECK 016
OK
(ONE OR BOTH)
CHECK 20NS
PULSE COLLECTOR
OF 0 17
1 - -- - 1
1
I
I
NO OR IMPROPER
OUTPUT (ALL RANGES)
CHECK PWR SUPPLY
VOLTAGES.
OK(ANY RANGE)
CHECK MULTIPLIER
SWITCH RAMP CAP.,
WIRING,R33,R34ANDR3S
...------1------,
I
I
BAD
SEE POWER SUPPLY
TROUBLESHOOTING TREE
a PRINCIPLE OF OPERATION
IN SECT. IV OF MANUAL
OK
CHECK 20NS
COLLECTOR OF 018
I
.-
--,I
I
OK
CHECK SCHMITT
TRIGGER WAVEFORMS
I
BAD
CHECK 20NS
BASE OF 017
BAD
CHECK C18, R4S
I.
OK
CHECK 017
EMITTER CIRCUIT
I
BAD
SEE PARA. 4-24
PRINCIPLE OF OPERe
I N SECT. IV OF
MANUAL AND FIG. 8-S
OK
CHECK 016
NOTE:
IF LOWEST THREE FREOUENCY RANGES ONLY
ARE FAULTY CHECK FEEDBACK CIRCUITS
010,011 AND 12.
6
2118-C -4
Figure 8- 1. Pulse Generator Troubleshooting Tree
- 70V
-70V ADJUST
HAS
INSUFFICIENT
RANGE
REGULAT ION
OK
CHECK
VOLTAGE
DIVIDER
RI6,RI7,Rla,VR3,
VR4.A2Q4
SUPPLY
(- 70 VOLTS
)-70 VOLTS
CHEC K
BI AS
Q2
NOT
REGULATING
CHECK DC
VOLTAGE
ON
C OF Q 2
(- 9aV DC
CHECK
RECTIFIER;
CHECK
RJI, C2
REVERSE
BIASED
CHECK
Q2
)- 9aV DC
SHORT
VERY BRIEFLY
E TO C
OF A2Q3
WH I LE
MONITORING
-70V
OUTPUT
FORWARD
BIASED
CHECK
B I AS
A2Q3
REVERSE
BIASE.D
CHECK
A2Q3
FORWARD
BIAS
CHECK
BIAS
A2Q4
)-70 VOLTS
(-70 VOLTS
CHECK
Q2
CHECK
BIAS ON
A2Q3
REVERSE
BI ASED
CHECK
A2Q4
VR3, VR4,
DIVIDER
REVE.RSE
BIASED
CHECK
V R4
DIVIDER
FORWARD
BIASED
CHECK
VR3,
A2 Q4
FORWARD
BlASE D
CHECK
A2Q3
TYPICAL - 70V SUPPLY
IMPEDANCE
WITH 412A -Q2 EMITTER - 3K
TYPICAL RIPPLE - 30MV RMS
21IB-C-6
Figure 8-2. -70-Volts Supply Troubleshooting Tree
Section VIII
Figures 8·1, 8·2, and 8·3
- 20V
-20V ADJUST
HAS
INSUFFICIENT
RANGE
CHECK
R7.R8.R9.VR2.
A2C2
SUPPLY
(- 20 VOLTS
)-20 VOLTS
CHECK
BIAS
NOT
REGULATI NG
CHECK DC
VOL TAGE
COLLECTOR
QI
(-25V DC
CHECK
CRI.CR2.
CI
01
REVERSE
BIASED
CH EC K
01
)-25V DC
SHORT
BRIEFLY
E TO C
OF A2Q\
WH I L E
MONITO RING
-20V
OUTPUT
FORWARD
BIASED
CHECK
B I AS
A201
REVE RSE
BIASED
CHECK
A201
(-20VOLTS
CHECK
01
)- 20 VOLTS
CHECK
BIAS ON
A20 I
REVERSE
BIASED
CHECK
A2Q2
DIVI DER
VR2.A2C2
FORWARD
BIASED
CHECK
A202
REVERSE
BI AS ED
CHECK
DIVIDER
VR2
FORWARD
BIASED
CHECK
A202
FORWARD
BIASED
CHECK
A2QI
TYPICAL - 20V SUPPLY IMPEDANCE
WITH 412A - 01 EMITTER 150 OHMS
TYPICAL RIPPLE - 5 MV RMS
2118- C - 5
Figure 8·3. -20- Volts Supply Troubleshooting Tree
8·3
IMPROPER 50 OHM OUTPUT
(600 OHM OUTPUT OK)
CHECK FOR DEFECTIVE RANGE
ON AMPLIFIER SWITCH S6
HAVE OUTPUT (ANY RANGE)
CHECK FOR BROKEN WIRES,
BAD CONTACTS, BAD RESISTORS
ON S6
NO OR IMPROPER OUTPUT (ALL RANGES)
CHECK DC VOLTS SWING ON BASES OF
032
033
WHEN GAIN VERNIER IS ROTATED
-12V TO-17V
a
WRONG VOLTAGE
CHECK
027,028
OK
CHECK WAVEFORM ON
C OF 025
I
OK
CHECK WAVEFORM ON
C'S OF 029
030
BAD
CHECK WAVEFORM ON
C OF 023
OK
CHECK
025
BAD
CHECK
023,CR19
a
BAD
CHECK
029
030
OK
CHECK
032
033
a
a
NO OR IMPROPER 600 OHM OUTPUT
(50 OHM OUTPUT OK)
CHECK WAVEFORM ON
C OF 026
BAD
CHECK WAVEFORM ON
C OF 024 AMPLIFIER
APPROXIMETLY 1.6V P TO P
I
BAD
CHECK 024,R88
MULTIPLIER SWITCH
55
OK
CHECK WAVEFORM ON
C OF 031
r - - - - I- - - - - ,
OK
CHECK
026,VRI0,RT2
BAD
CHECK
031
OK
CHECK
03,04,R6A
aB
2118-C-3
Figure 8-4.50 Ohms-6000hms Output Troubleshooting Tree
R2
53
55
R3
AI
Q4
21IB-A-11
Figure 8-5. Chassis Component Identification - Top View
Model 211B
Section V III
Figures 8-4,8-5 and 8-6
R4
(UNDER)
A2
S2
21IB-A-IO
Figure 8-6. Chassis Component Identification· Bottom View
8-4
ASSEMBLY
AISI
/'
/'
f\
AJ
AMPLITUDE
(V ACROSS SOn>
//
FROM
PI
COLLECTO~
OF - 7
A2029
(SEE FIG. 8- 6)
J61
tt
r------------\--~--r-----------l-----r-----------I
I
I
I
I
I
I
I
I
I
I
I
I
CI:J
I~
o)--~----o
rO
0)-------0
I
I
l~
I
I
I
c::::c:J
I
I
~
0------0
I
I
10.25
I
r-o
I
I
I
~
[Q;IJ
~
I
I
~
AIRI
37.4
I
I
AI R4
121
AIR2
150
AI R3
15o
AIR5
75
AIR7
247.5
AIR6
75
AIR8
61.11
AI R9
61.11
-
I
L
21IB-AllEN CKT-BI1
REFERENCE
AI
RI-9
SI
DESIGNATIONS
CHASSIS
J4.6
PI
Reference designations within assemblies
are abbreviated. Add assembly designation
as prefix to form
com~lete
designation
[e.g .. RI on assemby A2 is A2RI).
DELETED:
Figure 8-7. Attenuator Assembly A1 Schematic
J4
Table 8-2. Voltages with Schmitt Trigger Locked in One State
Transistor
Emitter of
Emitter of
014 opened
015 opened
014
Emitter
Base
Collector
open
-3.1V
-0.3V
Emitter . . . . . . . . . . . . . . . . . - 7. 1V
Base
-6.3V
Collector
-2.3V
015
Emitter
Base
Collector
-4.6V
-3.8V
-4.0V
Emitter. . . . . . . . . . . . . . . . .. open
Base
-5.6V
Collector
OV
016
Emitter
Base
Collector
-4.6V
-4.0V
OV
Emitter
Base
Collector
-0.7V
OV
OV
013
Emitter
Base
Collector
-12.7V
-12.1V
-3.1 V
Emitter
Base
Collector
-8.6V
-7.9V
-6.3V
05
Emitter
Base
Col/ector
-19.2V
-18.6V
-0.8V
Emitter
Base
Collector
-19.2V
-18.6V
-0.8V
06
Emitter
Base
Collector
-20.0V
-19.2V
-12.5V
Emitter
Base
Collector
-20.0V
-19.2V
-8AV
Q7
Emitter
Base
Col/ector
-0.1 V
-0.8V
-11.5V
Em itter
Base
Collector
-0.1 V
-0.8V
-7AV
08
Emitter
Base
Collector
-12.5V
-12.0V
OV
Emitter
Base
Collector
-8AV
-7.8V
OV
09
Emitter
Base
Collector
-11.7V
-12.0V
-20.0V
Emitter
Base
Collector
-7AV
-7.8V
-20.0V
012
Emitter
-19.8V
Base
-19.2V
Collector. . . . . . . . . . . . . . . . -0.2V
Emitter
Base
Collector
-16.3V
-15.6V
-4.8V
011
Emitter
Base
Collector
-O.8V
-0.2V
-0.7V
Emitter
Base
Collector
-5.3V
-4.8V
-0.6V
010
Emitter
OV
Base
0.7V
Collector. . . . . . . . . . . . . . . .. O.8V
Emitter
Base
Collector
OV
0.6V
-5.3V
Table 8-3. DC Voltage and Waveform Test Conditions
1. Set the model 211 B controls as follows:
MULTIPLIER
1K
SYMMETRY
Approx 50%
FREQUENCY (Hz)
AMPLITUDE (sw)
__
_
10
_
5
VERNIER
AMPLITUDE (dial)
cw
_
_
cw
2. Voltages and waveforms may vary slightly from one instrument to
another. Unless otherwise indicated, all voltages are dc, taken with a
20,000 ohm-per-volt meter and measured to chassis ground.
Section VIII
Figures 8-7 and 8-8
rt1~i''""
~
..
JI
I
I
I
S2
9
I
I
I
I
I
I
2
I
I
I
I
I
I
3
I
I
I
I
I
I
4
I
I
I
~
(9)~
Referente dUllnations within assemblies
are abbreviated Add assembly deSlination
as prefu to form complete deSllinallon
Ie I: , Rl on assembly A2 IS A2RI)
REFERENCE DESIGNATIONS
A2
CI-6
CRI-8
01-4
RI-18
VRI-4
CHASSIS
CI,2
DSI
FI
JI
01,2
RI
SI,2
TI
WI
DELETED:
I
21IB-PWR SUPPLy-al?
Figure 8-8. Power Supply Schematic
8-5
Section VIII
Tables 8-2, 8-3 and Figure 8-9
A
Model 211 B
o
c
B
F
E
1
1
2
2
3
3
4
4
5
5
REF
DESIG
C1
C2
C3
C4
C5
C6
C7
C8
C9
Cl0
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24
C25
C26
0-4
0-4
F-4
0-5
E-3
E-4
C-4
A-4
A-4
A-4
A-3
A-3
A-3
A-3
A-4
A-4
C-5
C-2
C-2
C-2
C-4
C-2
B-1
B-3
C-3
0-2
C27
C28
C29
C30
C31
C32
C33
C34
C35
C36
C37
C38
CRl
CR2
CR3
CR4
CR5
CR6
CR7
CR8
CR9
CR10
CR11
CR12
CR13
CR14
0-2
E-2
E-l
0-2
0-1
E-2
E-2
E-2
0-3
E-3
E-3
0-3
F-4
F-4
F-4
F-4
F-5
F-5
F-5
F-5
0-5
C-4
C-5
C-4
A-2
A-2
CR15
CR16
CR17
CR18
CR19
CR20
CR21
L1
L2
L3
L4
L5
L6
L7
L8
L9
01
02
03
04
05
06
07
08
09
010
A-2
A-2
B-3
B-3
C-2
E-1
F-2
B-2
B-3
0-2
E-2
E-2
0-2
0-2
E-2
E-2
0-5
0-5
E-5
E-5
C-5
C-5
C-4
C-4
C-4
B-5
011
012
013
014
015
016
017
018
019
020
021
022
023
024
025
026
027
028
029
030
031
032
033
R1
R2
R3
B-5
B-5
B-4
B-4
B-4
C-3
B-2
B-2
B-2
B-3
B-4
B-3
0-2
0-4
0-2
0-3
0-1
0-2
E-2
E-1
0-3
E-2
E-1
0-4
0-5
0-5
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
E-4
E-4
0-4
0-5
0-5
0-5
E-3
E-4
E-4
E-5
E-4
E-4
E-5
E-5
E-5
0-5
0-5
C-5
C-5
C-5
C-5
C-5
C-4
C-4
C-4
C-4
R30
R31
R32
R33
R34
R35
R36
R37
R38
R39
R40
R41
R42
R43
R44
R45
R46
R47
R48
R49
R50
R51
R52
R53
R54
R55
C-4
A-4
A-4
B-5
B-5
B-5
C-5
B-4
C-5
B-5
C-5
A-4
B-4
B-4
C-4
C-2
C-2
C-4
C-4
C-4
C-4
C-4
C-3
C-3
C-3
C-4
R56
R57
R58
R59
R60
R61
R62
R63
R64
R65
R66
R67
R68
R69
R70
R71
R72
R73
R74
R75
R76
Rn
R78
R79
R80
R81
R82
A-2
B-2
A-1
A-2
A-2
B-2
B-2
B-2
B-2
B-3
C-3
C-3
C-3
C-3
C-2
C-2
0-2
0-2
C-2
C-2
C-2
C-2
0-1
C-l
C-2
0-2
0-2
R83
R84
R85
R86
R87
R88
R89
R90
R91
R92
R93
R94
R95
R96
R97
VR1
VR2
VR3
VR4
VR5
VR6
VR7
VR8
VR9
VR10
RT1
RT2
GRID
LaC
0-2
0-1
E-2
E-2
C-3
C-3
0-4
0-3
0-4
0-3
0-3
E-3
E-3
E-2
0-3
F-4
0-5
E-5
E-5
C-4
B-4
C-4
B-2
B-2
0-3
B-5
0-3
2118-A-13
Figure 8-9. Assembly A2 Component Identification
8-6
p C£PLA~E'Me.J(
Pf\§.~
Section V III
Igures 8-7 and 8-8
F"
WI
POWER
m
CABLE
Figure 8-8. Power Su pp Iy Schematic
8-5
Model 211 B
O.IV/DIV
PK:-IOV
IVI DIV
PK:-4.BV
O.5V/DIV
ZV/DIV
PK:-13V
WOUTPUT"TOP: 5V/DIV
EXT INPUT BOTTOM: O.5V/DIV
'V
IV/DIV
PK:-65V
2118 - 8-1
Figure 8-10. Test Point Waveforms
I
.
Section VIII
Figures 8-10 and 8-11
MULTIPLIER
o
R3A
1000
cw
(901 )
~
PIO
I
I
........t---"--4J;;.:.j
w
L
S5A
t
(905)
-L---1
t~
-9.4V
~C~R~II_
CW
(96B)
,,
J
III
C7
IUF
CW
- BV
R2'3 '="
5000
FREQ
ADJ
I
,
L
R35 XIOOGAIN
ADJ
5000
-0
DISCHARGE
DIODE
:'
I (901)
'=' 51
I
.01 U F
6'
I
-=
'
S4
;r---"-R50
150
TO
BASE OF
A2Q231
A2Q24
C 22
100UF
INVERTER
QI3
R44
430
RT!
130
..L
R27
270
t
R36
150
- 20V
-0.7V
- 16.6V
VR6
6.81V
R37
2200
'="
o
cw//
:
-20V
-2V
"'" j
T
I SYMMETRY I
-
YR7
4.12V
R'39
4300
.g:JF
R53
_,.-,--If-........--'~'="
IMDEDANCE
CONVERTER
"!:-
CRI2
R25
1000
C20
IUF
QI6
..
-IOV
CI9
400
r-------~
*
"
CI6
2000
~
J3
- 20V
-v
R32
12
IG
i?~\-::::--:-:----.,..--1---_-:::.
t
-<..J
~
,,(923)
I~
~~~~~~
R4G
27
o
07
'='
7~g
~
~
VR5
7.15V
~
I
-=
,,-(904)
(904)
-2~V:;- C3~
QI8
r--1~--_"":~:""LJ
fcig
-20V
51
INVERTER
017
--~
Q5
t5K
I
cw
-j~
HIGH
FREO
ADJ
.",
TRIGGER
AMPLIFIER
0-
0
)+
0(904)
~
I>(956) ~
)+
CI2
10UF
C9
9- 35
CURRENT
CONTROL
(965)
0(924)
CI3
IUF
*
~
'0
XIO GAIN
ADJ
100UF
0(935)
SWITCHING
CIRCUIT
-12.4V
>(934)
+
0(903)
...._ _....._ _
CB
110
R31
56
08 109
R2
10K
(956 )
CII
CHARGE DIODE
~.-
-20V
XI GA;;'l
ADJ
/
/
I
_..../
_ _ _ _ _ _ (9~7 )
~oEJil
R54
I
/
1
....-12.4V
~
--,
I
/
--
I
,-------
R24
2000
r
I SYMMETRY I
.",
I
t
R3B
1000
- 20V
REFERENCE
A2
C3
J2,3
R 2,3
as - 22
R 19 - 69
S3-5
-20Y
ISYMMETRY I I
+6.ay
~
CHASSIS
C7
25
CR9 - I B
L 1,2
t
,
DESIGNATIONS
S3
0
I
I
I
BIAS
AOJ
(6)
-20Y
021
I
I
I
I
R66
1000
,
+6.ay
RTI
V R5 - 9
t
~
DELETED'
-20V
t
R60
1800
J2
-=
VR8
6.98V
I R5S
I 10K
R61
3900
RS3
560
t
t
CQNT6
TRIG
OUT-Sll
L
BEAD
~
21IS-FREQ
I
, L2
~""'<
,
RS1
30
C2'3
100UF
t
R64
tOOO
t
;;J;
C25
IUF
-20Y
-20Y
~6j
R6S
1000
t
-20V
t
-20Y
-20Y
-20Y
-20V
- 20V
Figure 8-11. Frequency Control Schematic
8-7/8-8
l
I
----------------------------------
Section VIII
Figure 8-12
50 OHM
OUTPUT
DRIVER
AMPLIFIER
032/033
-5V
-12.4V
029/Q30
L4
BEAD
TO ATTENUATOR
(SEE
AISI
~----.-..---p~l~SWITCH
FIG.B-7)
032
L6
BEAD
--20V
L7
BEAD
C26
12
r
C27
15
C33
.0IUF
...........""'"~--.....- - - 2 0 V
RB3
56
R84*
22
Q23
-15V
RBI
2200
+ __+-1
FROM
EMITTER _ _
OF QI6
R72
390
t
t
-20V
t
-20V
~ -(90-" ~~
-Il
C34
.0IUF
L9
BEAD
~
C31
IUF
-...:..~'-----------___+--I(
0 33 ~
•
-5V
-12.4V
CR20
....-_-----.JV\",..._-----4.....,~R77
1000
R75
470
*
r
- ...
------------~-~-------
..
I
C32
IUF
AMPLITUDE
CONTROL
I-l
Q27/ Q28
R4 . /
1000
~C"'"W----(9-6-8-<)
?---JIIV'v---......,~
"
I
.
(956)
AMPLIFIER
I~i&
Q24
R86
100
030
L5
BEAD
R80
120
-20V_ -
l
C29*
22
-20V
L3
I
-
-17V
R85
100
~
t
AMPLIFIER
L8
BEAD
---'
I
:1
I
I
QI
DRIVER
AMPLIFIER
-Q31
AMPLIFIER
Q26
-61V
AMPLITUDE
R94
39
(0)
-30V
I-- CW
I'
I
I
-67V
R89
1000
R96
150
C36
3300
l
,
CW
R91
10K
R90
24K
t
C37
3300
-70V
-70V
----- - - ---(945)
PIO S5
rlM-U-L-T-I-PL-I--E-R---'
Q
I
I
R95
39
(4) I
.J
(906)
R6B
1200
C38
.0IUF
t
'---------
R6A
1200
I
R97
12K
VRIO
9.53V
GAIN
AOJ
J5
I
OUTPUT
I
AMPLIFIER L
,
CR21
-----
_ J
2118-500/6000 OUTPUT CKTS-817
03/04
REFERENCE
CCJ
A2
S5C
Reference desiinations within assemblies
are abbreviated. Add assembly designation
as prefix to form complete designation
I'-R., Rl on assembly A2 is A2Rll·
C 26 - 38
CR19-21
L3-9
023 - 33
R70-97
RT2
VR 10
DESIGNATIONS
CHASSIS
J5
03,4
R4-6
S5
DELETED:
R5
20K
Figure 8-12. Output Circuitry Schematic
8-9
EUROPE
AUSTRIA
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Stamford New Road
Altrincham, Cheshire, England
Te" (061) 928-8626
Telex: 668068
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Cable, MEASUREMENTS
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Telex: 10721
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Weerdestein 117
P.O. Box 7825
Amsterdam, Z 11
Tel, 020-42 77 77
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Telex: 13 216 hepa nl
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Box 149
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N-1344 Haslum
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Telex: 16621 hpnas n
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Telectra-Empresa Tecnica de
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Rua Rodrigo da Fonseca 103
P.O. Box 2531
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ZUrcherstrasse 20
P.O. Box 64
CH-8952 Schlieren Zurich
Tel, (01) 98 1821124
Cable, HPAG CH
Telex: 53933 hpag ch
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Rue du Bois-du-Lan 7
P.O. Box 85
1217 Meyrin 2 Geneva
Tel, (022) 41 5400
Cable: HEWPACKSA Geneva
Telex: 27333 hpsa ch
UNITED KINGDDM
Hewlett-Packard ltd.
224 Bath Road
Slough, Sll 4 OS, Bucks
Tel, Slough (07531 33341
Cable, HEWPIE Slough
Telex, 84413
Hewlett·Packard ltd.
"The Graftons"
Stamford New Road
Altrincham, Cheshire
Tel, (061) 928-8626
Telex: 668068
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PLEASE CDNTACT:
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Handelskai 52/3
P.O. Box 7
A-120S Vienna
Ph, (0222) 33 66 06 to 09
Cable: HEWPACK Vienna
Telex: 75923 hewpak a
ALL OTHER EURDPEAN
CDUNTRIES CDNTACT:
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P.O. Box 85
CH·1217 Meyrin 2 Geneva
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Tel, (022) 415400
Cable: HEWPACKSA Geneva
Telex: 2.24.86
TURKEY
Telekom Engineering Bureau
Saglik Sok No. 15/1
Ayaspasa-Beyoglu
P.O. Box 437 Beyoglu
Istanbul
lei, 49 40 40
Cable: TElEMATION Istanbul
Hewlett-Packard Italiana S.p.A.
Vicolo Pastod, 3
1-35100 Padova
Tel, (49) 66 40 62
Telex: 32046 via Milan
SPAIN
I-iewlett-Packard Espanola, S.A.
Jerez No 8
Madrid 16
Tel, 4582600
Telex: 23515 hpe
Blue Star, Ltd.
1-1-117/1
Sarojini Devi Road
Secupllerabad 3
Te:-;"7 63 91, 7 7393
Cable, BlUEFROST
Yokogawa·Hewleti-Packard ltd.
Nitto Bldg.
2-4-2 Shinohara-Kita
Kohoku-ku
Yokohama 222
Tel, 045-432-1504
Telex, 382·3204 YHP YOK
PAKISTAN
Mushko & Company, Ltd.
Oosman Chambers
Abdullah Haroon Road
Karachi 3
Tel, 511027, 512927
Cable: COOPERATOR Karachi
Yokogawa-Hewlett-Packard Ud.
Chuo Bldg.
Rm. 603 3,
2-Chome
IZUMI·CHO,
Mito, 310
TeL 0292-25-7470
Mushko & Company, ltd.
38B, Satellite Town
Rawalpindi
Tel,41924
Cable: FEMUS Rawalpindi
AFRICA, ASIA, AUSTRALIA
ANGDLA
Telectra Empresa Hcnia
de Equipamentos EI~ctricos
SAR
Rua de Barbosa Rodrigues
42.1 0
Box 6487
luanda
Cable: TELECTRA Luanda
AUSTRALIA
Hewlett-Packard Australia
Pty. ltd.
22·26 Weir Street
Glen Iris, 3146
Victoria
Tel: 20-1371 (6 lines)
Cable: HEWPARO Melbourne
Telex: 31 024
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Pty. ltd.
Corner Bridge & West Streets
P)'mble, New South Wales, 2073
Tel, 449 6566
Cable: HEWPARO Sydney
Telex, 21561
Hewlett·Packard Australia
Ply. ltd.
97 Churchill Road
Prospect 5082
South Australia
Tel, 65-2366
Cable: HEWPARO Adelaide
Hewlett Packard Australia
Pty. ltd.
2nd Floor, Suite 13
Casablanca Buildings
196 Adelaide Terrace
perth, W.A. 6000
Tel, 25·6800
Cable: HEWPARO Perth
Hewlett-Packard Australia
Pty. ltd.
10 Woolley Street
P.O. Box 191
Dickson A.C.T. 2602
Tel, 49-8194
Cable: HEWPARO Canberra ACT
Hewlett·Packard Australia
Pty. ltd.
6 Harvard Street
P.O. Box 135
Kenmore 4069 Queensland
Tel, 70·4050
CEYLDN
United Electricals Ltd.
P.O. Box 681
Yahala BUilding
Staples Street
Colombo 2
Tel, 26696
Cable: HOTPOINT Colombo
CYPRUS
Kypronics
19 Gregorios & Xenopoulos Road
P.O. Box 1152
Nicosia
Tel, 45628/29
Cable: Kypronks Pandehis
ETHIDPIA
African Salespower & Agency
Private ltd., Co.
P. O. 80x 718
58/59 Cunningham SI.
Addis Ababa
Tel, 12285
Cable: ASACO Addisababa
HDNG KONG
Schmidt & Co. (Hong Kong) ltd.
Blue Star, Ltd.
23/24 Second Line Beach
Madras 1, India
Tel, 2 39 55
Telex: 379
Cable, 8lUESTAR
Blue Star, Ltd.
IB Kaiser Bungalow
Dindli Road
Jamshedpur, India
Tel, 38 04
Cable, BlUESTAR
i5~i 8~~in~~?s
Building 15th Floor INDONESIA
10 Chater Road
Bah Bolon Trading Coy. N.V.
Dialah Merdeka 29
Tel: 240168, 232735
Bandung
Cable, SCHMIDTCO Hong Kong
6:~le4,9\~~~1560
Ha~g Kong
INDIA
Blue Star Ltd.
Kasturi BUildings
Jamshedji lata Rd.
Bombay 20BR, India
Tel, 29 50 21
Telex: 3751
Cable, BlUEFROST
Blue Star ltd.
Band Box House
Prabhadevi
Bombay 2500, India
Tel, 45 73 01
Telex: 3751
Cable: BlUESTAR
Blue Star Ltd.
14/40 Civil lines
Kanpur, India
Tel, 68882
Coble, BlUESTAR
Blue Star, ltd.
7 Hare Street
P.O. Box 506
Calcutta 1, India
Tel, 23-0131
Telex: 655
Cable, 8LUESTAR
Blue Star Ltd.
Blue Star House,
34 Ring Road
Lajpat Nagar
New Delhi 24, India
Tel, 62 32 76
Telex: 463
Cable, BlUESTAR
Blue Star, ltd.
Blue Star House
l1/llA Magarath Road
Bangalofe, 25
Tel, 51473
Telex: 430
Cable, 8lUESTAR
Telex: 08-809
IRAN
Multicorp International Ltd.
Avenue Soraya 130
P.O. Box 1212
Teheran
TeL 83 1035-39
Cable: MULTI CORP Tehran
Telex~ 2893 mci tn
ISRAEL
Electronics & Engineering
Div. of Motorola Israel ltd.
17 Amlnadav Street
Tel·Avlv
Tel, 36941 (3 lines)
Cable: BASTEL Tel-Aviv
Telex: MOTlL IL
JAPAN
Yokogawa-Hewlett-Packard ltd.
Ohashi Building
1·59·1 YOYogi
Shlbuya-ku. Tokyo
Tel, 03-370-2281/92
Telex: 232-2024YHP
Cable, YHPMARKET TOK 23-724
Yokogawa-Hewlett-Packard Ltd.
Njsei Ibaragi Bldg.
2-2-8 Kasuga
Ibaragi-Shi
Osaka
Tel, (0726) '23-1641
Telex, 5332·385 YHP OSAKA
Yokogawa·Hewlett-Packard Ltd_
Ito Building
No. 59, Kotorl-cho
Nakamura·ku. Nagoya City
Tel, (052) 551·0215
KENYA
Kenya Kinetics
P.O. Box 18311
Nairobi, Kenya
Tel, 57726
Cable, PROTON
KOREA
Amtraco Corporation
Industrial Products Div.
Seoul P.O. Box 1103
8th floor, DaeKyung Bldg.
107 Sejong Ro
Chongro-Ku, SeOUl
Tel, 73·8924·7
Cable: AMTRACO Seoul
LEBANON
Constantin E. Macridis
P.O. Box 7213
AI-Beirut
TeL 220846
Cable: ElECTRONUCLEAR Beirut
MALAYSIA
MECOMB Malaysia ltd.
2 Lorong I3/6A
Section 13
Petaling Jaya, Selangor
Cable: MECOMB Kuala lumpur
PHILIPPINES
Electromex Inc.
5th Floor, Architects
Center Bldg.
Ayala Ave., Makati, Rizal
C.C.P.O. 80x 1028
Makati, Rizal
Tel, 86-18·87, 87·76-77
Cable: ELEMEX Manila
SINGAPDRE
Mechanical and Combustion
Engineering Company ltd.
9, Jalan Kilang
Red Hill Industrial Estate
SingapDre, 3
Tel, 642361·3; 632611
Cable: MECOMB Singapore
Hewlett-Packard Far East
Area Office
P.O. Box 87
Alexandra Post Office
Singapore 3
Tel, 633022
Cable, HEWPACK SINGAPORE
MDZAMBIQUE
A. N. Goncalves, LOA.
4.1 ApI. 14 Av. D.luis
P.O. Box 107
Lourenco Marques
Cable: NEGON
SDUTH AFRICA
Hewlett PaCkard South Africa
(Pty.), ltd.
P.O. Box 31716
Braamtontein Transvaal
Milnerton
30 De Beer Street
Johannesburg
Tel, 725-2080, 725-2030
Telex, 0226 JH
Cable: HEWPACK Johannesburg
NEW ZEALAND
Hewlett-Packard (N.Z.) Ltd.
94-96 Dixson SI.
P.O. Box 9443
Courtenay Place
Wellington, N.I.
Tel, 56·559
Cable: HEWPACK Wellington
Hewlett Packard South Africa
(Pty.), ltd.
Breecastle House
Bree Street
Cape Town
Ter, 3·6019, 3-6545
Cable: HEWPACK Cape Town
Telex; 5-0006
Hewlett Packard (NL) ltd.
Box 51092
pukuranga
Tel, 56·9837
Cable: HEWPACK, Auckland
Hewlett Packard South Africa
(PtY.I, ltd.
641 Ridge Road, Durban
P.O. Box 99
Overport, Natal
Tel: 88-6102
Telex: 567954
Cable: HEWPACK
TAIWAN
Hewlett Packard Taiwan
39 Chung Shiao West Road
Sec. 1
Overseas Insurance
Corp. Bldg. 7th Floor
Taipei
Te" 389160,1,2, 375121,
Ext. 240-249
Telex, TP824 HEWPACK
Cable: HEWPACK Taipei
THAILAND
UNIMESA Co., ltd.
Chongkoinee Building
56 Suriwongse Road
Bangkok
Tel, 37956, 31300, 31307,
37540
Cable; UNIMESA Bangkok
UGANDA
Uganda Tele-Electric Co., Ltd,
P.O. Box 4449
Kampala
Tel, 57279
Cable: COMCO Kampala
VIETNAM
Peninsular Trading Inc.
P.O. Box H·3
216 Hien-Vuong
Sa1 aon
Tel, 20-805, 93398
Cable, PENTRA, SAIGON 242
ZAMBIA
R. 1. Tilbury (Zambia) ltd.
P.O. Box 2792
lusaka
Zambia, Central Africa
Tel, 73793
Cable: ARJAYTEE, Lusaka
MEDITERRANEAN AND
MIDDLE EAST COUNTRI ES
NOT SHDWN PLEASE
CONTACT:
Hewlett·Packard
Co-ordination Office for
Mediterranean and Middle
East Operations
Via Marocco, 7
1-00144 Rome-Eur, Ital)'
Tel, (6) 59 40 29
Cable: HEWPACKlT Rome
Telex: 61514
DTHER AREAS NDT
LISTED, CONTACT:
Hewlett·Packard
INTERCONTINENTAL
3200 Hillview Ave.
Palo Alto, California 94304
Tel, (4]5) 326·7000
(Feb. 71 493·1501)
TWX, 910·373·1267
Cable: HEWPACK Palo Allo
Telex: 034·8300, 034·8493
E 8-72
•
MANUAL:CHANGES
MODEL 211B
SOUAREWAVEGENERATOR
Manual Serials Prefixed:' 0817A
Manual Printed: March 1971
Make all changes listed below a~ Er:rata.;Check .the following table for your instrument serial
and make listed change(s) to the rminu.al:
'
Mak~
Serial Prefix or Number
Serial !=,refix or Number
Changes
prefi~
and/or serial number
Make Changes
1210A
1218A
1,2
ERRATA
Page 5-1,
Delete Paragraph 5-8.
Page 5-2,
Delete Table 5-2,
Page 5,3, Paragraph 5-9 step b,
Change TIME/DIV setting to 10 usec.
Add: TRIGGER SLOPE
(-)
Page 5-3, Paragraph 5-10,
Change c to read as follows:
c. Set controls for Model 211 B as follows:
MULTIPLIER .............•....... 100K
FREOUENCY (Hz)
. . . . . . . . . . . .. 1
SYMMETRY
ccw
AMPLITUDE (switch) ......•.......... 5
VERNIER ........•......•......... cw
Change f to read as follows:
f. AdjusHhe high-frequency oscilloscope SWEEP
VERNIER until one pulse period occupies 8·
divisions on the CRT..
Delete step g.
Page 5-4, Figure 5-5.
Reverse the position of the 1410A and 1425A.
Page 5-5, Figure 5-6.
Reverse the 'position of the 1410A and 1425A.
Page 5-8a, Performance Check Record •.
Delete the following items from Paragraph 5-13:
Preshoot (leading edge) ~5%
Overshoot (leading edge) ~ 5%
Preshoot (trailing edge) ~ 5%
Overshoot (trailing edge) ~ 5%
Table 6-2,
A2C18: Change to HPPart No. 0150·0073;
TO 1; C: fxd cer 100 pF 10%1000 wVdc.
A2C27: Change to HP Part No. 0160-2261; TO 1;
C: fxd15 pF 5% 500wVdc.
Table 6-2 (Cont'd'J,
.
A2R19: Change to HPPart No. 0758-0076; TO 1;
R: fxdflm560 ohm:'2% 1/4W.
.
A2R31: Change to HP Part No. 0758-0094; TO 1;
R: fxd metox 62 ohm 5% 1/2W.
A2R32: Add asterisk. (*) to indicate factory selected
value.
A2R41: Change to HP Part No. 0758·0101; TO 1;
R: fxd metox 150K ohm 5% 1/2W.
A2R48: Change to HP Part No. 0758-0035; TO 1;
R: fxd metox 3K ohm 5% 1/2W.
A2R75: Change to HP Part No. 0758-0066; TO 1;
. R: fxd metox 620 ohm 5% 1/4. ,
DS 1: Change to HP Part No. 2140,0244; TO 1;
. DS: neon p/o S1.
A2R84: Change to HP Part No. 0698-5884; TO 1; R:
fxd flm 22 ohm,.5% 1/2W.
MP5: Change to HP Part No. 01701-04109; TO 1;
MP: Cover, transformer T1.
Add: MP16; HP Part No. 00211-00207; TO 1; MP:
Panel, rear.
S2: Change to HP Part No. 3101-1234; TO 1;
S: slide DPDT.
Page 8-6, Figure 8-9,
Replace Figurtl 8-9. with the attached Figure 8-9.
Page 8-7/8-8, Figure 8-11,
A2R 19: Change value to 560 ohms.
A2R24: Change value to 1000 ohms.
A2R31: Change value to 62 ohms.
A2R41:Change value to 151k ohms.
A2R48: Change value to 3000 ohms.
VR6:
Move 01:l base connection from cathode
of VR6 to anode of VR6.
Page 8:9, Figure 8~ 12,
A2R75: Change value to 620 ohms.
. 7 June 1972 .
l:i = Latest additions to this change sheet.
This change sheet supersedes all prior change sheets for this manual.
Supplement A for
00211 -90901
Model 211 B Page 2/4
CHANGE 1
Table 6-2,
MP2: Change to HP Part No. 5000-8583; TO 1;
MP: Cover, bottom, olive-gray..
.
', ...
MP3: Change to HP Part No. 5000·8479; TO 2;'
MP: Cover, side, olive-gray.
Tabl~, 6·2 (Cont:d),
MP~:. Change to HP Part No. 5060-8573; TO 1;
. MP: Cover top, olive-gray.
MP16:Change to HP Part No. 00211-10202; TO 1;
MP: Panel, rear, mintllray.
\Add: MPH; HP Part No; 00211·10201; TO 1; MP:
. Panel, front; mint-gray,
A CHANGE 2
Table 6·2,
S1: Change to HP Part No. 3101·1248; T01; S:
push, SPOT, illuminated.
Revision C
•
Model 211B Page3/4
:;.
OPTIONS
Page 7-1, Paragraph ]-6,
Change paragraph 7-6 to read as follows:
Page 7-1 (Cont'd),
7-6. Options for an HP instrument are standard modification installed at the factory, and are available on
request.
OPTION X95
Table 7~2; Replacement Parts for Option X95 Modification
I'
Ref
. Desig
HP Part No .
MP2
5000-0717
1
MP: Cover, bottom, blueilray
MP3
5000-0567
2
MP: Cover, side, blueilray
MP4
5060-0718
1
MP: Cover, top, blue-gray
MP16
00211-00207
1
MP: Panel, rear, light gray
MP17
00211-00201
1
MP: Panel, front, light gray
Revision B
TQ
Description
I
,
HEWLETT
00211-90901
11 ~ PACKARD
PRINTED IN U.S.A.
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