Stanford Research Systems DG535 Operation And Service Manual

MODEL DG535

Digital Delay / Pulse Generator

1290-D Reamwood Avenue

Sunnyvale, CA 94089 U.S.A.

Phone: [phone], Fax: [phone]

Copyright © 1994, 1997, 2000

All Rights Reserved

Revision 2.5

11/2000

DG535 DIGITAL DELAY / PULSE GENE RATOR

OPERATION AND SERVICE MANUAL

CONDENSED INFORMATION

Safety and Preparation for Use v
Quick-Start Instructions vi
DG535 Specifications vii
Abridged GPIB Command List viii
Error Status Byte Definition ix
Instrument Status Byte Definition ix

GUIDE TO OPERATION

Introduction 1

Front Panel Features 1
Power Button 1
Liquid Crystal Display 1
Menu Keys 1
Data Entry Keys 1
Trigger Status LED's 1
Delay Outputs 1
Pulse Outputs 2
Option 06 - Trigger Inhibit Input 2

Table of Contents

Rear Panel Features 2

Power Entry Module 2
IEEE-488 Standard Port 2

10.000 MHz Reference 2
Option 02 - ±35 Volt Rear Panel Outputs 3
Front Panel Programming 3
Trigger Menu 4
Trigger Submenus 4
Trigger Tricks 4
Delay Menus 5
Output Menus 5
AB and CD Outputs 6
GPIB Menus 6
Store and Recall Menus 7

ACCURACY, DRIFT, AND JITTER

Accuracy 7
Timebase Drift 8
Jitter 8
Channel to Channel Interaction 8

i

Time Delay vs Repetition 9

GPIB PROGRAMMING

Detailed Command List 10
Initialization Commands 10
Status Commands 10
Error Status Byte Definition 10
Instrument Status Byte Definition 11
Display Control Commands 12
Delay and Output Commands 14
Delays 14
Output Control 14
Trigger Commands 15
Store and Recall Commands 16

TROUBLESHOOTING

LCD Contrast 17
Cold-Boot 17
Quick Test 17
Output Levels 17
Jitter 17
GPIB Problems 18

CALIBRATION

Required Equipment 19
Calibration Procedure 19
Trigger Threshold Calibration 19
Optional 1 ppm Internal Timebase Calibration 19
Output Amplitude Calibration 20
Calibration Menus 20
Output Offset Calibration 21
Jitter Calibration 21
Jitter Cal Factor 21
Delay Cal Factor 21

CIRCUIT DESCRIPTION

Microprocessor System 22
IEEE-488 Interface 22
Keypad and LED Indicators 22
LCD Display 22
Output Ports on the Top PCB 22
Output Ports on the Bottom PCB 22
Port Address Decoding 23
Input Ports 23
Digital to Analog Converter 24
Timebase 24

ii

Frequency Synthesizer 24
Line Trigger 24
Trigger Selection 24
Trigger Circuits 25
Trigger Sequence 25
Overview of the Delay Channels 25
Jitter Compensation 26
Jitter Precharge and Sample & Hold 26
Kickpulse 27
The T0 Delay 27
Channel A's Digital Delay 27
Analog Delays 27
Reset Cycle and Status Bits 28

Output Drivers 28
Offset Control 28
Impedance Control 29
Gate Output Drivers 29
Power Supplies 29
Rear Panel Output Drivers 30

PARTS LISTS

Top PCB 32
Bottom PCB 32
Front PCB 37
Optional Outputs PC Board 37
Miscellaneous and Chassis Assembly 38

PC LAYOUT

Top PCB 39
Bottom PCB 40
Front PCB 41
Optional Outputs PCB 41

FAST TRANSITION-TIME MODULES 42

SCHEMATIC DIAGRAMS 45

Top PCB

Sheet #1 Microprocessor System, GPIB and Digital I/O
Sheet #2 Slow Counter/Timers
Sheet #3 Trigger Status and Reset Sequence
Sheet #4 Rate Generators
Sheet #5 Power Supply and Dropout Detection
Sheet #6 System Connectors and Polarity Control

Bottom PCB

Sheet #1 Trigger Circuit and Gated 80 MHz

iii

Sheet #2 10 MHz Reference and 80 MHz PLL
Sheet #3 Jitter Compensation
Sheet #4 ECL Counters and Resync Circuits
Sheet #5 T0 Analog Delay and Output Driver
Sheet #6 A Analog Delay and Output Driver
Sheet #7 B Analog Delay and Output Driver
Sheet #8 C Analog Delay and Output Driver
Sheet #9 D Analog Delay and Output Driver
Sheet #10 AB & CD Gate Output Drivers
Sheet #11 Digital to Analog Converter and Multiplexer
Sheet #12 Power Regulators

Front PCB
Optional Outputs PCB

Table of Figures

Figure - 1 DG535 Rear Panel Page - 2
Figure - 2 DG535 Front Panel Page - 3
Figure - 3 Maximum Error vs. Time Delay Page - 6
Figure - 4 Apparent (Peak To Peak) Jitter and RMS Jitter Page - 7
Figure - 5 RMS Jitter Page - 8
Figure - 6 DG535 Block Diagram Page - 30
Figure - 7 DG535 Timing Diagram Page - 31
Figure - 8 Top PC Layout Page - 39
Figure - 9 Bottom PC Layout Page - 40
Figure - 10Front PC Layout Page - 41
Figure - 11Optional Outputs PC Layout Page - 41
Figure - 12Fast Transition-Time Modules Page - 42
Figure - 13Fast 2 Volt Output Step Page - 44

iv

SAFETY AND PREPARATION FOR USE

******CAUTION******

This instrument may be damaged if it is
operated with the LINE VOLTAGE
SELECTOR set for the wrong ac line voltage
or if the wrong fuse is installed.

LINE VOLTAGE SELECTION

The DG535 operates from a 100V, 120V,
220V or 240V (50 or 60 Hz) ac power source.
Before applying a power source, verify that
the line voltage selector card (located in the
rear panel power entry module) is in the
correct position. The selected voltage may be
seen through the clear window by viewing the
power entry module from below.

To change the line voltage selection, remove
the line cord, slide the window to the right,
and pull the "fuse pull" lever out. Verify that
the correct fuse is installed for the ac line
voltage: 1 Amp for 100 or 120V, and 1/2 Amp
for 220 or 240V. Pull out the line voltage
selector card with a pair of needle nose pliers,
and insert it with the correct line voltage
facing the bottom of the instrument and
towards the line cord. Verify that the correct

line voltage can be seen through the slot that is
just above thefuse holder. Push the fuse holder
back in, and install the correct fuse. Slide the
window to the left, and replace the line cord.

LINE CORD

The DG535 uses a three wire power cord for
connection to the power source and to a
protective ground. The exposed metal parts of
the instrument are connected to the outlet
ground: to protect against electrical shock,
always use an outlet which has a properly
connected protective ground.

To avoid shock or injury do not remove
product covers or panels. Do not operate the
product without all covers and panels in place.

CONNECTION TO OTHER
INSTRUMENTS

All front panel BNC shields are connected to
the chassis ground and to the power outlet
ground via the power cord. Do not apply any
voltage to either the shields or to the outputs.
The outputs are not protected against
connection to any potential other than ground.

v

QUICK START INSTRUCTIONS

(1) Make certain that the correct line voltage is selected on the rear panel.

(2) Press the power button "in" to turn on the unit.

(3) Press the RECALL Menu key, the "0" digit, and the EXC key in sequence to
recall default settings.

(4) Press the left cursor key (<) twice to select internal trigger.

(5) Trigger the oscilloscope on the rising edge of T0's output, and display A's
output on the 1µs/div scale.

(6) Press the DELAY Menu key and use the cursor keys to change the A delay
from 0.0 seconds.

(7) If you ever change the OUTPUT Menu, be sure to specify the correct
load impedance.

(8) If you have problems, read the detailed descriptions and troubleshooting
sections that follow.

vi

DG535 SPECIFICATIONS

DELAYS Channels Four independent delay outputs : A, B, C and D

Range 0 to 999.999,999,999,995 seconds
Resolution 5 ps
Accuracy 1500 ps + timebase error x delay
Timebase Standard: 25 ppm crystal oscillator

Optional: 1ppm TCXO (Opt. 03)
External: user provides 10.0 MHz reference

RMS Jitter Ext Trig to any output: 60 ps + delay x 10-8

T0 to any output: 50 ps + delay x 10-8

Trig Delay Ext Trig to T0 output : 85 ns

INTERNAL RATE GENERATOR Rate Single shot, .001 Hz to 1.000 MHz, or Line

Resolution 0.001 Hz below 10 Hz, otherwise 4 digits
Accuracy Same as timebase
Jitter 1:10,000
Settling <2 seconds for any rate change
Burst Mode 2 to 32766 pulses per burst at integer multiples

(4 to 32767) of the trigger period

INPUTS External Trigger Rate: dc to 1/( 1 µ s + longest delay)

Threshold: ±2.56 Vdc
Slope: Tr igger on rising or fal ling edge

Impedance: 1 MΩ + 40 pF or 50Ω

Option 06 TTL front panel trigger inhibit input.

OUTPUTS T0, A, B, C, D, AB, -AB, CD and -CD

Load 50Ω or high impedance
Risetime 2 to 3 ns (typical)
Slew Rate 1 Volt/ ns
Overshoot <100mV + 10% of pulse amplitude
Levels TTL: 0 to 4 Vdc, normal or inverted

ECL: -1.8 to -.8 Vdc, normal or inverted

NIM: -.8 to 0 Vdc, normal or inverted
VAR: Adjustable offset and amplitude

between -3 and +4 Vdc with 4V

maximum step size
Accuracy 50 mV + 3% of pulse amplitude
Option 02 Rear panel T0, A, B, C, D outputs for 1µs

pulses, amplitudes typically x8 of corresponding front
outputs at 1kHz rep. rate. Output level is reduced by
2V/mA of additional average output current.

COMPUTER INTERFACE IEEE488 Standard GPIB

SH1, AH1, T6, TE0, L4, LEO, SR1, RL1, PP0, DC1, DT1, C0 and E1.
256 characters are remembered in the command buffer.
All instrument functions and settings may be controlled over the
interface bus.

GENERAL Dimensions: 14" x 8.5" x 4.75"

Weight: 10 lbs
Power: 70 Watts from 100, 120, 220, or 240 Vac
Warranty: One year parts and labor on materials and workmanship.

vii

ABRIDGED COMMAND LIST

INITIALIZATION

CL Clear instrument
GT{i}{,j}{,k} Specify one to three ASCII codes which will terminate each response from the DG535

STATUS

ES Returns the Error Status byte
ES i Returns bit i of the Error Status Byte
IS Returns the Instrument Status byte
IS i Returns bit i of the Instrument Status Byte
SM {i} Set Status Mask for service request to i.

DISPLAY

DL {i,j,k} Select Display Line to menu i, submenu j, line k.
CS {i} Set Cursor Mode (i=0) or Number mode (i=1)
SC {i} Move cursor to column i= 0 to 19
MC i Move cursor left (i=0) or right (i=1)
IC i Increment (i=1) or decrement (i=0) the digit at the current cursor location.
DS string Display a string of 1-20 characters. Do not use spaces (use_underline_instead) or

semicolons.

DS Clear Display String

DELAYS

DT i{,j,t} Delay Time of channel i is set to t seconds relative to channel j. Example:

DT 3,2,1.2E-6 will set B=A+000.000,001,200,000 seconds

OUTPUTS

TZ i{,j} Set the Termination Impedance (Z). Output i is configured to drive a 50Ω load (j=0)

or a high-Z load (j=1)
OM i{,j} Set Output i to Mode j where j=0,3 for TTL, NIM, ECL, or VARiable.
OA i{,v} Output amplitude of output i is set to v Volts if in the VARiable mode
OO i{,v} Output Offset of output i is set to v Volts if in the VARiable mode
OP i{,j} Output Polarity of channel i is inverted (j=0) or normal (j=1) for TTL, ECL or NIM.

TRIGGER

TM {i} Set Trigger Mode to Int, Ext, SS or Burst (i=0,1,2,3)
TR i{,f} Set Int Trigger Rate (i=0) or Burst Trigger Rate (i=1) to f Hz.
TZ 0{,j} Set Trigger input impedance to 50Ω (i=0) or to high impedance (j=1)
TL {v} Set External Trigger Level to v Volts.
TS {i} Trigger Slope set to falling (i=0) or Rising Edge (i=1)
SS Single-Shot trigger if Trigger Mode = 2
BC {i} Burst Count of i (2 to 32766) pulses per burst
BP {i} Burst period of i (4 to 32766) triggers per burst

STORE and RECALL

ST i Store all instrument settings to location i=1 to 9
RC i Recall all settings from location i=1 to 9 Default settings may be recalled from location 0.

viii

ERROR STATUS BYTE INSTRUMENT STATUS BYTE

Bit Description Bit Description

7 Always zero 7 Memory contents corrupted
6 Recalled data was corrupt 6 Service request
5 Delay range error 5 Always zero
4 Delay linkage error 4 Trigger rate too high
3 Wrong mode for the command 3 80MHz PLL is unlocked
2 Value is outside allowed range 2 Trigger has occurred
1 Wrong number of parameters 1 Busy with timing cycle
0 Unrecognized command 0 Command error detected

NOTES

In all of the commands listed here, i, j and k
are integer values and f, t and v may be
integer, floating point or exponential notation.
Optional parameters are enclosed in curly
brackets. If optional parameters are omitted
then the current value of those parameters will
be sent back to the GPIB controller. For
example, the command "TM 3" sets the
Trigger Mode to mode 3 while the command
"TM" will return the response "3".

Also, blanks are ignored, case is ignored,
multiple commands may be sent on one line if
separated by semicolons. All responses are
terminated by a carriage return and a line feed.
The line feed is sent with an EOI.

The Delay and Output commands use integer
codes which are assigned to each front panel
BNC. The table for these assignment is given
below.

Integer Assignment

0 Trigger Input
1 T0 Output
2 A Output
3 B Output
4 AB and -AB Outputs
5 C Output
6 D Output
7 CD and -CD Outputs

ix

GUIDE TO OPERATION

INTRODUCTION

The DG535 Digital Delay and Pulse Generator
can provide four precisely timed logic
transitions, or two precisely controlled pulses.
The four digitally controlled time intervals may
be programmed from the front panel or via the
GPIB. Front panel BNC's provide high slew rate
outputs at TTL, NIM, ECL or continuously
adjustable levels. The outputs may be set to
drive either 50Ω or high impedance loads.

The high accuracy (1 ppm), precision (5 ps),
wide range (0 to 1000 s), and low jitter (50 ps
rms) recommend the DG535 as the solution to
many difficult timing problems in science and
industry.

FRONT PANEL OPERATION SUMMARY
POWER BUTTON

GPIB allows the user to see data received via

the GPIB and to set the GPIB address

STORE and RECALL provide a convenient

method to save all of the instrument
settings.

Detailed descriptions of each of these menus will be
given.

DATA ENTRY KEYS

Sixteen keys are used to enter and modify data.
There are three modes of operation for this keypad:
the mode is indicated by the three LED's in the
center of the panel. The cursor mode (< >) allows
individual digits to be modified in a fashion similar
to the operation of thumbwheel switches. The
numeric mode (NUM) allows the data to be entered
as a numeric string. The remote mode (REM) lets
the GPIB controller lock-out front panel operation.
The key beneath the Mode LED's allows the user to
change the keypad mode, if not locked-out by the
GPIB controller.

The unit is turned on by depressing the POWER
button. All instrument settings are stored in
nonvolatile RAM, and so the settings are not
affected by turning the power on and off. The
model, firmware version, and serial numbers for
the unit will be displayed briefly when the
power is first applied.

LIQUID CRYSTAL DISPLAY

The 20 character LCD is the user interface for
all front panel programming operations. The
wide viewing angle LCD is backlit by an
electroluminescent panel for convenient
operation in low light level conditions. When
the keypad is in the cursor mode, the contrast of
the LCD may be adjusted for optimum viewing
by the two right most keys on the front panel.

MENU KEYS

Six Menu Keys select the function to be
programmed. Most menu items are self­explanatory:

TRIG defines the trigger source
DELAY is used to adjust the four digital

delays

OUTPUT sets the output pulse levels

TRIGGER STATUS

Five LED's are used to indicate the trigger status.
The TRIG LED blinks each time the unit is
triggered, the BUSY LED is on whenever a timing
cycle is in progress, the RATE LED is lit if a trigger
is received while BUSY. The INT LED indicates
that the internal rate generator is the trigger source,
and the 50Ω LED is on when the EXT TRIG input
is terminated in 50Ω. The EXT TRIG BNC is the
input for external triggers.

DELAY OUTPUTS

There are five delay output BNC's: T0, A, B, C and
D. T0 marks the start of the timing interval and is
most useful when an internal trigger source has been
selected. The logic transitions at the outputs of A, B,
C and D may be set from 0 to 1000s in 5 ps
increments with respect to T0. The outputs may be
programmed for TTL, NIM, ECL or adjustable
output levels, and can drive 50Ω or high impedance
loads. The polarity of each output may be set to
provide a rising or a falling edge when the channel
times out. The outputs will remain asserted until 800
ns after the longest delay.

1

PULSE OUTPUTS

There are four, pulse output BNC's: AB, -AB,
CD and -CD. The AB output provides a pulse
for the interval between the time set for channel
A and channel B. The CD output provides a
pulse for the interval between the time set for
channel C and channel D. These outputs allow
the DG535 to generate two precisely timed
complementary pulses.

OPTION 06 - TRIGGER INHIBIT INPUT

If the DG535 was ordered with the option 06,
there will be a BNC connector located directly
under the power button on the front panel to
which the trigger inhibit input is applied. This
input is active low and is used to disable the
trigger mode. A TTL low inhibits triggers while
a TTL high permits triggers. If there is no input
signal, the input floats high and all triggers are
enabled.

for instructions on selecting the correct line voltage
and fuse.

IEEE-488 STD PORT

The 24 pin IEEE-488 rear panel connector allows a
computer to control the DG535. The command
syntax for the GPIB transactions is detailed in the
programming section of this manual. The address of
the instrument on the GPIB is set from the front
panel by the GPIB menu.

10.000 MHz REFERENCE

Internal or external references may be used as the
timebase for the digital delays. If the internal
timebase is to be used, the rear panel switch should
be in the INT position. In this position, the 10.000
MHz internal timebase will be appear as a 1V p-p
square wave at the rear panel BNC. This output is
capable of driving a 50Ω load, and may be used to
provide the same timebase to several DG535's.

REAR PANEL FUNCTIONS
POWER ENTRY MODULE

The power entry module is used to fuse the line,
select the line voltage, and block high frequency
noise from entering or exiting the instrument.
Refer to the section at the front of this manual

An external reference may be applied to the DG535
by placing the switch in the EXT position. A 10.0
MHz, ±1%, reference with a 1 Vp-p amplitude must
be applied to the rear panel BNC which now serves
as a reference input. If the external reference has
insufficient amplitude, or is more than a few percent
off the nominal 10.0 MHz, then the message "Ext
Clk Error" will appear on the LCD until the problem

2

is remedied.

To use the timebase in one DG535 as the
timebase for several DG535's, set the switch on
the "master unit" to the INT position. Use coax
cables to daisychain the 10.000 MHz output
from the "master unit" to the other DG535's
whose switches are all set to the EXT position.
Use a 50Ω terminator to terminate the 50Ω line
at the last unit on the daisychain.

OPTION 02 - ±32 Volt Rear Panel Outputs

If the DG535 was ordered with the option 02,
there will be five rear panel BNC's to provide
amplified outputs for T0, A, B, C and D. These
outputs have nominal adjustable output
amplitudes from -32 to +32 Volts. The pulse
width is approximately 1 µs, and the leading
edge has a transition time of 2 to 3 ns. The
outputs are designed to drive 50Ω loads,
however, if the cable is terminated into a high
impedance load, the pulse amplitude will double
(up to 64 Volts) for a duration equal to the
round trip cable delay. The amplitude of the
output pulse is reduced by 2 Volts per mA of
average output current: the average output
current is only 0.7 mA for a 32 Volt output into
50Ω at a 1 kHz repetition rate. For high
impedance terminations, charging and
discharging of the cable capacitance may be the

most important current factor. In this case, the
average current is given by:

I = 2Vtƒ / Z

where, V is the pulse step size, t is the length of the
cable in time (5 ns/meter for RG-58), ƒ is the pulse
repetition rate, and Z is the cable's characteristic
impedance (50Ω for RG-58).

FRONT PANEL PROGRAMMING

Pressing a new menu key will take you to the "top"
menu for that item. Each successive press of the
same menu key will take you to the "next" submenu
for that item. The power-up menu will be the same
menu that was displayed when the unit was last
turned off.

The Keypad mode (cursor or numeric) will be the
same as it was the last time the menu item was
accessed. Some menu items only allow one type of
keypad mode, for example, the GPIB address may
only be entered in the numeric mode.

In the cursor mode, only the keys with arrows are
active. The keys with the green arrows are used to
modify the displayed value (up/down) or to move
the cursor (left/right). The two keys with grey
arrows are used to adjust the LCD display contrast.

3

In the numeric mode, the entire keypad is active.
Data may be entered as a floating point number
or in exponential notation. Entered data may be
edited by using the BSP (backspace) key.
Backspacing past the left edge of the screen will
cancel the command. The entered data is
actually used when the EXC (Execute) key is
pressed. Selecting another menu item will have
the same affect as pressing the EXC key.

Error messages will appear on the LCD to
indicate improper commands. For example, an
attempt to decrement a delay below zero will
generate the error message "Delay Range Error".
The error message may be cleared from the
LCD by pressing any key.

TRIGGER MENU

The "top" line on the trigger menu is:

and digits more than three places beyond the
decimal point will be truncated.

The External trigger mode has three submenus to
specify the threshold, slope and termination
impedance of the external trigger input. Each
submenu is selected by pressing the TRIG key. The
Threshold may be entered as a floating point number
or may be modified in the cursor mode. The Slope
may be selected by using the cursor (up/down) keys,
as can the Trigger termination impedance. The
threshold, slope, and termination impedance shown
in the example menus would be appropriate for
triggering on the rising edge of a TTL Pulse.

The Single-Shot trigger mode has only one
submenu. If SS is selected by the cursor, pressing
the TRIG menu key will display "Single Shot
(EXC)." Now each press of the execute key will
trigger the timing cycle.

Int Ext SS Bur Line

The cursor, underlines one of the five modes in
the list to indicate Internal, External, Single­Shot, Burst, or Line trigger. The left and right
cursor keys may be used to change the mode.
Subsequent menus, which are different for each
trigger mode, are selected by pressing the TRIG
menu key again.

TRIGGER SUBMENUS

Mode Menu Example

Int Rate =10000.000Hz

Ext Threshold =+1.00V

Slope(±) = +
Trigger Term = HighZ

SS Single-Shot (Exc)

Bur Rate =10000.000Hz

Pulses/Burst 10
Periods/Burst 20

Line (No submenu)

The Internal trigger mode has only one submenu
to set the trigger rate. The rate may be entered in
the numeric mode or modified in the cursor
mode. Only four digits of precision are allowed,

The Burst mode has three submenus to specify
trigger rate, number of pulses per burst, and number
of periods between the start of each burst of pulses.
All of the items may be entered in the numeric
mode, or modified in the cursor mode. The Rate
may be entered in floating point or exponential
notation, and may be specified to four digits of
precision. For the entries shown in the above menu
example, there would be 10 pulses per burst, each
pulse separated by 100 µs, and a new burst of pulses
would start every 20 periods, i.e. every 2 ms.

The Line trigger mode has no submenus. The unit
will be triggered on a zero crossing of the power line
at the line frequency. The line trigger is also
synchronized to the internal 80 MHz timebase, so
that the timing jitter of the delay outputs in this
trigger mode will be very low (typically 25 ps rms).

TRIGGER TRICKS

There are several techniques that may be used to
extend the versatility of the DG535's trigger modes.

The Jitter of the delay outputs will be reduced by
about a factor of two (to less than 25 ps rms) if the
unit is triggered synchronously with the 10 MHz
time base. This is done automatically if the Line
Trigger is selected. You may also want to arrange
your external trigger so that it is synchronous with
the 10 MHz output on the rear panel (if the internal
time base is being used).

4

It is often desirable to trigger the unit at a sub­multiple of the trigger source. Suppose you wish
to trigger a laser at 10 Hz synchronously with
the zero crossing of the power line. In this case
you would select the Line Trigger, and set
channel D's delay to 95 ms. Once triggered, the
DG535 will ignore other triggers until all
channels have timed out, hence every sixth Line
trigger (at 60 Hz) will cause a new timing cycle.
The RATE error LED on the front panel will be
illuminated to indicate that triggers occurred
while the unit was busy. Trigger rates up to
100 MHz can be used, with the unit ignoring all
triggers until all channels have timed out, as in
the above case.

DELAY MENUS

There are four delay menus to specify the delays
for channels A, B, C and D. Each delay may be
entered in floating point or exponential notation
or may be modified in the keypad cursor mode.
The maximum time delay is

999.999,999,999,995 seconds, which may be set
with a resolution of 5 ps.

Example Delay Menus

A=T0+0.123456789125
B=A+0.001000000000
C=T0+123.456789123455
D=C+0.000000010000

Any delay channel may be "linked" to another
channel. Two examples of this are shown in the
above sample menus. While A is referenced to
T0, channel B's delay is set to A's delay plus

0.001 seconds. Linking provides a convenient
method to specify a pulse output (AB) as a pulse
start time and width rather than start and stop
times. Now, if channel A's delay is modified, B's
delay moves with it, so that the pulse width
stays at 0.001 seconds. With the above settings,
the CD output will produce a very accurate 10
ns pulse despite the very long delay which is
specified for channel C.

To change the linkage, the cursor is positioned
beneath the character just to the right of the
equal sign, and the cursor up/down keys are
used to select from the available links. Not all
links are available, for example, in the above
menus linking channel A to channel B is not

allowed, as B is linked to channel A in the second
menu.

Delay can be scrolled by first selecting the delay
menu, positioning the cursor under the digit to be
incremented. Depress the #5 and either the up or
down keys simultaneously. The step rate will be
approximately 4 Hz, and may vary during a scan.

OUTPUT MENUS

The output menus are used to specify the load
impedances, pulse output amplitudes, offsets, and
polarities for each of the front panel BNC's. The
cursor (left/right) keys are used in the "top" line of
the OUTPUT menu to select which output is to be
programmed. Successive presses of the OUTPUT
key will access each menu line for the selected
output, finally returning to the "top" line.

The menu items for the T0, A, B, C and D output
are virtually identical. An example of these menus
is given here for channel A's output:

A:load= High Z
A:TTL NIM ECL VAR
A:Inverted Normal (if TTL, NIM or ECL is
selected)
A:Amplitude = +1.00V (if VARiable is selected)
A:Offset = 0.50V (if VARiable is selected)

The first line in this submenu specifies the load
impedance. The cursor (up/down) keys are used to
select between High Z and 50Ω loads. This is a very
important step in setting up the output: the wrong
choice will cause the output to have half the
expected amplitude, or to misbehave entirely.

The cursor (left/right) keys are used in the second
submenu to select either standard logic levels for the
output, or continuously variable offsets and
amplitudes. If either the TTL, NIM or ECL logic
levels are selected, the next submenu is used to
specify the polarity of the output pulse: the
"Normal" polarity will provide a rising edge at the
output at the set time: "Inverted" polarity will
provide a falling edge.

If VAR (variable) is selected in the second
submenu, then subsequent submenus allow the pulse
amplitude and offset to be set. Both numbers may be
entered as floating point numbers or may be
modified by the cursor keys. The minimum

5

amplitude is 100 mV, the maximum amplitude
is 4.00 VDC, and outputs outside the range of -3
to +4 VDC are not allowed.

AB and CD OUTPUTS

The menus for the AB and CD outputs are
similar to the other outputs. Example menus for
the AB output are shown on the following page:

AB&-AB Loads = High Z
AB: TTL NIM ECL VAR
AB:Amplitude = +1.00V (if VARiable is
selected)
AB:Offset= +0.50V (if VARiable is selected)

The cursor (up/down) keys select the load
impedance for both the AB and -AB outputs. It
is very important that if a 50Ω load is specified,
that a 50Ω load be present on BOTH the AB
and the -AB output BNC's.

The cursor (left/right) keys select the logic
levels for the AB and -AB outputs. If TTL, NIM
or ECL is selected, then no further submenus are
needed to specify the outputs: both the
"Normal" and "Inverted" logic levels are
available at separate front panel BNC's. If VAR
is selected, then the next two submenus are used
to set the amplitude and offset of the outputs.

GPIB MENUS

There are three menus which are accessed by the
GPIB key. They are:

Data:_______________
GPIB Address: 15
Service RQST: (EXC)

The first menu displays the last 15 characters of data
that have been received over the GPIB. 256
characters are retained in memory and may be
viewed by scrolling the display window with the
cursor keys. Spaces and control codes will not be
displayed, however special characters for carriage
returns and line feeds will be displayed. This feature
is very useful when debugging computer programs
that control the DG535.

The GPIB address may be set in the second menu.
The keypad is automatically placed in the numeric
mode for this menu item. Any address from 1 to 30
may be entered: the default address for this
instrument is 15.

The third menu allows the user to generate a service
request by pressing the EXC button (lower right on
the front panel). A service request is used to attract
the attention of the GPIB controller.

6

STORE and RECALL MENUS

There are ten storage locations from which
setup data may be recalled. One of these
locations, number 0, contains default setup data,
the other nine locations contain setup
information that was stored by the user. Because
the information is stored in nonvolatile RAM, it
will be available for recall even if the instrument
is turned off.

All of the instrument's settings are stored, even
those which are not currently active: for
example, the external trigger threshold is saved
even though the instrument is operating on
internal trigger.

Operating data is stored by pressing the STORE
key, one digit (1-9) to specify the storage
location, and the EXC (execute) key. Mistakes
may be edited with the BSP (backspace) key.

Instrument settings are recalled from storage by
pressing the RECALL key, one digit (0-9), and
the EXC (execute) key. If the stored data has
been corrupted since it was saved, the error
message "Recall Error" will be displayed. The
error message can be removed by pressing any
key. A defective Lithium battery or very noisy
ac line voltages will cause "Recall Errors".

ACCURACY, DRIFT, AND JITTER

Each of the delay channels, A, B, C and D, may
be programmed to time out from 0 to 1000
seconds with a resolution of 5 ps. The factors,

which detract from this ideal performance, are
discussed here.

ACCURACY

The error in the time delay between any two outputs
is less than (1500 ps [500 ps typical] + Timebase
error x Time between Outputs). (This specification
is exclusive of time shifts due to slew rates at the
outputs, i.e., it should be measured with both
outputs set for the same logic levels driving the
same loads). The timebase error depends on the
timebase being used:

Standard <25 ppm 0-50 °C
Option 03 <1 ppm 0-50 °C
External Source spec + 0.0002ppm

Using the typical error figure, for a time delay of 1.0
ms, this table implies an absolute error of ±25 ns,
±1.5 ns and ±0.5 ns respectively for the standard,
optional and external timebases (assuming a 0.01
ppm external source specification). If A=100.000µs
and B=100.01µs, the error with respect to T0 will be
±2.6 ns with the standard timebase, however the
accuracy of A with respect to B will be ±500 ps.

A graph showing the maximum time error as a
function time delay is shown in Figure 3. The four
curves show the time error for the standard,
optional, 0.01 ppm external, and ideal external
timebases. The excess error for time delays longer
than 1 second on the "ideal external source " curve
is due to drift in the analog jitter compensation
circuits.

7

TIMEBASE DRIFT

The drift of the timebase over several hours is
substantially less (x10 to x100 less) than the
absolute timebase error. The major factor in the
timebase drift is the instrument's temperature:
after the instrument has warmed up, the
timebase drift is about 0.5 ppm/°C for the
standard timebase, and about 0.05 ppm/°C for
the optional timebase. The drift between several
DG535's which are used in the same experiment
may be eliminated by daisychaining the
reference output from one DG535 to the
reference input on the other DG535's.

JITTER

Various noise sources in the DG535 modulate
the time delay for the outputs causing "jitter".
Some of these noise sources are common to all
of the channels, others are independent. The
distribution of the pulses around the desired
time can be approximated by a Gaussian (or
"normal") distribution:

Figure 4 shows the shape of the Gaussian
distribution and the relations between the rms jitter
and the peak-to-peak jitter.

The rms jitter, σ, is a function of the delay setting.
The jitter is about 50 ps rms for delays less than100
µs. For short delays, the peak-to-peak jitter
measured on an oscilloscope is about four times the
rms jitter. For long delays, the observed jitter
measured on an oscilloscope is

primarily due to the jitter of the oscilloscope's
horizontal (timebase) deflection circuits. For a good
300 MHz oscilloscope, the rms jitter is typically (25
ps + 10 ppm of the time base).

The rms jitterm, as a function of time delay, is
shown in Figure 5 for a Tektronix 2465
oscilloscope, the DG535 using an internal timebase,
and for a DG535 with an ideal external source. The
jitter for time delays longer than 10 seconds, using
the ideal external source, is due to the drift of the
analog jitter compensation circuits in the DG535. It
can be seen from this figure that the Tek 2465 scope
would show an apparent jitter of 1 ns rms at 100 µs
even though the DG535's jitter is only 50 ps rms.

where,

p(t)= probability of pulse occurring at time t
T = set time for the output (mean value)

σ = standard deviation of the distribution

CHANNEL to CHANNEL INTERACTION

There is a small interaction (pulling) between
channels A and B and between channels C and D
when these channels are set within 10 ns of each

8

other. The pulling of one channel by the other is
typically less than 100 ps.

TIME DELAY vs REPETITION RATE

The time delay for any channel may change by
200 ps as the pulse repetition rate is changed
from single shot to the maximum rate of 1/(1 µs
+ longest delay). The burst mode of triggering
is, effectively, a rapid change of the pulse
repetition rate.

9

GPIB PROGRAMMING

DETAILED COMMAND LIST

In all of the commands listed here, i, j and k are
integer values and f, t and v may be integer,
floating point or exponential notation. Optional
parameters are enclosed in curly brackets. In
general, if optional parameters are omitted then
the current value of those parameters will be
sent back to the GPIB controller. For example,
the command "TM 3" sets the Trigger Mode to
mode 3 while the command "TM" will return
the response "3".

Command errors will be reported in the Error
Status Byte. The controller should verify that
the Error Status Byte is zero after each
command is sent: a nonzero value indicates a
programming problem. When an error is
detected, all of the pending commands in the
communication buffer are cancelled.

Also, blanks are ignored, case is ignored,
multiple commands may be sent on one line if
separated by semicolons. All responses are
terminated by a carriage return and line feed.
The line feed is sent with an EOI.

INITIALIZATION COMMANDS

GPIB: The GPIB address is not

affected, but the terminator is
returned to its default value of a
carriage return and a line feed with
an EOI.

GT{i}{,j}{,k}
Specify one to three ASCII codes, which will
terminate each response from the DG535. The
default terminator for any response from the DG535
is a carriage return and a line feed. The line feed is
accompanied by an EOI. Example: to change the
terminator to line feed only, the command would be
"GT 10" (the ASCII code for line feed is 10
decimal). The EOI is always sent with the last
character of the terminator sequence.

STATUS COMMANDS

ES
Returns the Error Status byte. The error status byte
definition is given below. Example: if a command
was sent to the DG535 with too many parameters,
bit 1 would be set. If the ES command is used to
read the error status, and no other errors had
occurred, the value "2" would be returned. All bits
in the Error Status byte are latched and so will
remain set until the "ES" command is executed. All
bits are reset to zero after the "ES" command is
executed.

CL
Clear instrument. The communication buffers
are cleared and the default settings are recalled.
The instrument default settings are:

Trig: Trigger mode set to

Single-Shot (ie. triggers
are off)

Internal: The default trigger rate is

10,000 Hz

Burst Mode: Trigger rate = 10,000Hz, 10

pulses per burst and 20
periods per burst.

External: +1VDC, positive slope,

high impedance
termination.

Delays: All delays, A, B, C and D

are linked to T0 and set to
zero.

Outputs: All outputs are set to drive

high impedance loads to
TTL levels.

ES i
Returns bit i of the Error Status Byte. Example: the
command "ES 5" can be used to check for a delay
range error. If a delay range error had occurred since
the last ES or ES 5 commands had been sent, then a
"1" would be returned, otherwise the value "0"
would be returned. This command also resets the
error bit that is being checked.

ERROR STATUS BYTE DEFINITION

Bit Description

7Always zero
6 Recalled data was corrupt
5 Delay range error
4 Delay linkage error
3 Wrong mode for the command
2 Value is outside allowed range
1 Wrong number of parameters
0 Unrecognized command

10

Bit 6: This bit is set if the RC (recall stored
settings) command finds that the stored values
have been corrupted. A checksum is done on the
settings when they are stored, and if the
computed checksum on recall does not match,
then the command is aborted and this error bit is
set.

Bit 5: This bit is set if an attempt is made to set
a delay to a value below zero or above

999.999,999,999,995 seconds. Because the
delay channels may be linked to each other,
changing a delay to an allowed value may cause
another delay to exceed the allowed range of
values.

command to test one bit of the Instrument Status
byte.)

IS i
Returns bit i of the Instrument Status Byte.
Example: the command "IS 4" will test bit 4, the
"trigger rate too high" bit. The value "1" will be
returned if a trigger rate error occurred since the last
time the "IS" or "IS 4" command was sent. If no
error had occurred, then the value "0" will be
returned.

INSTRUMENT STATUS BYTE DEFINITION

Bit Description

Bit 4: This bit is set if an attempt is made to link
delays in an illogical fashion. For example
A=B+1.000 and B=A+2.000 is a condition
which clearly cannot be satisfied.

Bit 3: This bit is set if the instrument is not in
the correct mode for the command that was sent.
For example, if the instrument set to trigger on
the internal rate generator, the SS (single shot)
command will be ignored and cause bit 3 to be
set.

Bit 2: This bit is set if the value of a parameter
exceeds the allowed range for that parameter.
For example, if the command "TL 20.0" is sent,
the command will be ignored and bit 2 will be
set (because the trigger level may only be set
between ±2.56VDC).

Bit 1: This bit is set if too many or too few
parameters are sent with a command.

Bit 0: This bit is set if the command is
completely unrecognized.

IS
Returns the Instrument Status byte. The
definition of the instrument status byte is given
below. Example: if the trigger rate to the DG535
is too high, bit 4 of the instrument status byte
will be set. Sending the command "IS" will
return the value "16" (if no other bits have been
set). All of the bits in the instrument status byte,
except for the BUSY bit, are latched, ie., if a
trigger rate error is detected at any time, that bit
will stay set until the "IS" command is sent. All
bits, except the BUSY bit, will be reset to 0 after
the "IS" command is executed. (See the IS i

7 Memory contents corrupted
6 Service request
5Always zero
4 Trigger rate too high
3 80MHz PLL is unlocked
2 Trigger has occurred
1 Busy with timing cycle
0 Command error detected

Bit 7: This bit is set if the instrument settings were
corrupted since the last time power was removed.
The processor computes a checksum of RAM
contents, which contain the instrument settings,
when a power supply dropout is detected. The
checksum is again computed on power-up. If the
checksums do not match, then the default settings
are used (see CL command for default settings) and
the message "Memory Failure" is displayed. A
defective Lithium battery or very noisy ac line
voltages may cause "Memory Failures" to occur.

Bit 6: This bit is set if the unit is currently
requesting service of the GPIB controller. A service
request may be generated by a variety of conditions
as specified by the service request mask. This bit
allows the controller to see if this instrument was
the one that asserted the service request line on the
GPIB.

Bit 4: This bit is set if the trigger rate is too fast. The
instrument requires one microsecond after the last
delay has finished to reset all the delay channels. If a
trigger comes during this time, then the front panel
RATE LED will be turned on and bit 4 will be set.

Bit 3: This bit is set if a gross error is detected in the
80MHz PLL. This can happen if the rear panel
switch is set to EXT reference, and the applied

11

10.0MHz reference is too small or more than a
fewpercent off the nominal 10.0MHz. If this
occurs, the LCD will display the message "Ext
Clk Error".

Bit 2: This bit is set whenever a trigger occurs
that starts a delay cycle. Triggers, which occur
during a delay cycle, do not set this bit, rather
they will set bit 4, the rate error bit.

Bit 1: This bit is set if the unit is currently busy
with a timing cycle. Unlike all of the other
status bits, it is not latched (rather it reflects the
current status of the unit) and it is not reset
when read by the IS command (it is reset when
the unit finishes the current timing cycle.)

Bit 0: This bit is set if a command error is
detected. If this bit is set, the controller should
read the Error Status Byte to determine the exact
nature of the command error. Command errors
can originate from either the GPIB or from front
panel interactions.

SM {i}
Set Status Mask for service request to i. The service
request status mask is used to specify which
Instrument Status bits will generate a GPIB service
request. For example, if the command "SM 16" is
sent, then a service request will be generated if the
"trigger rate too high" bit is set. When a service
request is generated, the corresponding bit in the
Service Request Mask is turned off. This will
prevent an uncontrolled stream of service requests
from being generated by the DG535. To re-enable
the service request, the controller must again set the
service request mask with the "SM i" command.

CS {i}
Set Cursor Mode (i=0) or Number mode (i=1). The
unit must be in the cursor mode (CS 0) for the SC,
MC, or IC commands to work. Note that certain
menu items allow only one type of cursor mode. For
example, there is no numeric mode for the menu
item, which selects between TTL, NIM, ECL and
VAR outputs, and there is no cursor mode in the
STORE and RECALL Menus. Selecting an

DISPLAY CONTROL COMMAND

DL {i, j, k}
Select Display to show menu i, submenu j, line k. The menu, submenu, and line number designations are
given in the table below:

DISPLAY LINE SELECT TABLE

i j k Display Example Comment

0 0 0 Int Ext Ss Bur Line Trigger Mode Menu

0 1 0 Rate =1234000.123Hz Internal Trigger Rate
0 2 0 Threshold = +1.23V External Trigger Menu
0 2 1 Slope(±) = +
0 2 2 Trigger Term = 50Ω

0 3 0 Single Shot (EXC) Single Shot Trigger

0 4 0 Rate =1234000.000Hz Burst Trigger Menu
0 4 1 Pulses/Burst 12345
0 4 2 Periods/Burst 12345

1 0 0 A = T+123.456789123450 Delay Menus
1 0 1 B = A- 0.123456789125
1 0 2 C = B+ 23.456789123455
1 0 3 D = T+ 0.000000000005

12

i j k Display Example Comment

2 0 0 T0 A B AB C D CD Output Menu Select

2 1 0 T0: Load = 50Ω T0 Output Control Menus
2 1 1 T0: TTL NIM ECL VAR
2 1 2 T0: Amplitude = +1.23 (Only if VAR selected)
2 1 3 T0: Offset = -2.00 (Only if VAR selected)
2 1 4 T0: Inverted Normal (For TTL, NIM, and ECL)

2 2 0 A: Load = 50Ω A Output Control Menus
2 2 1 A: TTL NIM ECL VAR
2 2 2 A: Amplitude = +1.23 (Only if VAR selected)
2 2 3 A: Offset = -2.00 (Only if VAR selected)
2 2 4 A: Inverted Normal (For TTL, NIM, and ECL)

2 3 0 B: Load = 50Ω B Output Control Menus
2 3 1 B: TTL NIM ECL VAR
2 3 2 B: Amplitude =+1.23 (Only if VAR selected)
2 3 3 B: Offset = -2.00 (Only if VAR selected)
2 3 4 B: Inverted Normal (For TTL, NIM, and ECL)

2 4 0 AB & -AB Loads = 50Ω AB output control menu
2 4 1 AB: TTL NIM ECL VAR
2 4 2 AB: Amplitude = +1.23
2 4 3 AB: Offset = -2.43

2 5 0 C: Load = 50Ω C Output Control Menus
2 5 1 C: TTL NIM ECL VAR
2 5 2 C: Amplitude = +1.23 (Only if VAR selected)
2 5 3 C: Offset = -2.00 (Only if VAR selected)
2 5 4 C: Inverted Normal (For TTL, NIM, and ECL)

2 6 0 D: Load = 50Ω D Output Control Menus
2 6 1 D: TTL NIM ECL VAR
2 6 2 D: Amplitude = +1.23 (Only if VAR selected)
2 6 3 D: Offset = -2.00 (Only if VAR selected)
2 6 4 D: Inverted Normal (For TTL, NIM, and ECL)

2 7 0 CD & -CD Loads = 50Ω CD output control menu
2 7 1 CD: TTL NIM ECL VAR
2 7 2 CD: Amplitude = +1.23
2 7 3 CD: Offset = -2.43

3 0 0 Data: GPIB Strings GPIB Menu
3 0 1 GPIB Address = 15
3 0 2 Service RQST (EXC)

4 0 0 Store Store Menu
5 0 0 Recall Recall Menu

13

incorrect cursor mode will have no effect: the
error will not be reported in the error status
byte.

SC {i}
Move cursor to column i= 0 to 19. This
command allows the controller to position the
cursor under a particular digit (usually in a
DELAY menu) so that the digit may be
incremented or decremented by the "IC"
command. A request to position the cursor in a
non-allowed location (for example, under the
decimal point in a time delay menu) will result
in a "value outside of allowed range" error,
setting bit 2 in the Error Status byte.

MC i
Move cursor left (i=0) or right (i=1). This
command allows the cursor to be moved relative
to its present position.

Integer Assignment

0 Trigger Input
1 T0 Output
2 A Output
3 B Output
4 AB and -AB Outputs
5 C Output
6 D Output
7 CD and -CD Outputs

DELAYS

DT i{,j,t}
Delay Time of channel i is set to t seconds relative
to channel j. Example: DT 3,2,1.2E-6 will set
B=A+0.000,001,200,000 seconds. The command
DT 2,1,10.5 will set A=T0+10.500000000000
seconds. Setting delays shorter than 0 or longer than

999.999,999,999,995 seconds will set bit 2 of the
Error Status Byte.

IC i
Increment (i=1) or decrement (i=0) the digit at
the current cursor location. This command is
used to change a displayed parameter in a
manner analogous to operating a thumbwheel
switch.

DS string
Display a string of 1 to 20 characters. This
command allows the controller to display a
message on the DG535's liquid crystal display.
As with all data that is sent to the DG535,
spaces will be stripped from the transmitted
data, so the program should use the underline
character to_separate_words. Also, do not use
semicolons, as they are reserved characters
which allow several characters to be sent on the
same line.

If the "DS" command is sent without a string,
then the display will be cleared and the menu
item which was displayed before the "DS string"
command was used will be displayed.

DELAY AND OUTPUT COMMANDS

The Delay and Output commands use integer
codes, which are assigned to each front panel
BNC. The table for these assignment is given
below.

A "Delay Linkage Error", bit 4 of the Error Status
Byte, is caused by an attempt to totally disconnect a
time reference from T0. For example the commands
DT 2,3,1.5 ; DT 3,2,2.5 attempt to reference A to B
and B to A so that neither is referenced to T0. This
command sequence would generate a "Delay
Linkage Error".

An efficient method to change a delay is to position
the cursor under a digit (using the SC command) and
then increment/decrement the digit (using the IC
command).

OUTPUT CONTROL

TZ i{,j}
Set the Termination Impedance. Output i is
configured to drive a 50Ω load (j=0) or a high-Z
load (j=1). (If i=0, this command is used to set the
impedance of the external trigger input: see the
Trigger control section). Example: "TZ 4,1" will
configure both the AB and -AB outputs to drive high
impedance loads. The command "TZ 4" will then
return the response "1", indicating that the AB and ­AB outputs are configured to drive high impedance
loads.

OM i{,j}
Set Output i to Mode j where j=0-3 for TTL, NIM,
ECL, or VARiable. This command sets the logic
level of the front panel outputs. If TTL, NIM or

14

ECL is selected, the polarity of the logic output
is specified by the "OP" command. If the
VARiable output mode is selected, then the
output amplitude and offsets may be set with the
"OA" and "OO" commands. Example: the
command "OM 6,0" selects TTL levels (0 to
4VDC) for the D output.

OA i{,v}
Amplitude of output i is set to v Volts if in the
VARiable mode. This command is used to set
the amplitude, i.e. the size of the step, at an
output BNC. The maximum step size is limited
to ±4 Volts: the minimum step size is ±0.1VDC.
The specified step size must not cause the
output level (including the programmed offset)
to exceed +4V or -3V. Example: the command
sequence "OM 5,3; OO 5,0 ; OA 5,4.0" will
select the VARiable mode for output C, zero its
offset (see below) and set its amplitude to

4.0VDC. Note the importance of setting the
offset: if the offset was set to a level greater
than zero, the command "OA 5,4.0" would
generate an error because the programmed offset
plus amplitude would exceed the +4VDC
maximum.

OO i{,v}
Output Offset of output i is set to v Volts if in
the VARiable mode. This command is used to
set the offset of an output when in the VARiable
mode. For pulses which have a rising edge
output, the offset is the voltage between the
lowest output level and ground, and so a TTL
signal has zero offset and +4VDC amplitude,
while an ECL signal has -1.8VDC offset and a
+1VDC amplitude. To invert the polarity of the
pulse, i.e. for a falling edge output, a TTL
output is described as a +4VDC offset an a ­4VDC amplitude pulse, and an inverted ECL
pulse is described by a -0.8VDC offset with a -

1.0VDC amplitude.

OP i{,j}
Output Polarity of channel i is inverted (j=0) or
normal (j=1) for TTL, ECL or NIM outputs.
This command sets the polarity of logic pulses
at the BNC outputs. In all cases, normal polarity
means that the output will provide a rising edge
at the specified time. Example: the command
sequence "OM 5,2; OP 5,0" will set the C output
for an inverted ECL output, i.e., the output goes
from -0.8VDC to -1.8VDC when the channel
times out.

TRIGGER COMMANDS

TM {i}
Set Trigger Mode to Int, Ext, SS or Bur (i=0,1,2,3).
This command selects between Internal, External,
Single-Shot, or Burst trigger modes. Other trigger
commands are then used to completely specify the
trigger conditions: TR will set the internal trigger
rate, TL and TS set the trigger level and trigger
slope for external triggers, SS is used to execute a
single shot if in the SS mode, and BC and BP set the
burst count and burst period for the burst mode. The
TR, TL, TS, BC, and BP commands may be
executed at any time, regardless of the trigger mode.
Example: The command "TM 0" selects the internal
rate generator as the trigger source.

TR i{,f}
Set Internal Trigger Rate (i=0) or Burst Trigger Rate
(i=1) to f Hz. The frequency may be any value
between 0.001 Hz and 1.000MHz. The precision is

0.001Hz below 10Hz, or 4 digits if above 10Hz.
Other digits will be truncated. The internal rate
generator will settle to the programmed value within
2 seconds after the command is executed: significant
departures from the programmed value may be
expected during the 2 second settling period. (A
simple way to disable triggers during this settling
time is to select the single-shot trigger mode, i.e.
"TM 2".) Example: the commands "TM 0; TR
0,100.2" will select the internal trigger mode and set
the trigger frequency to 100.2Hz.

TL {v}
Set External Trigger Level to v Volts. This
command sets the threshold voltage for external
triggers. To completely specify the external trigger,
the TS (trigger slope) command must also be used.
Example: "TM 1; TL 1.00; TS 1" specify the
external trigger mode, with the trigger level at

1.00VDC, with a positive slope. These values would
be appropriate for triggering on the rising edge of a
TTL logic pulse. (Also see the TZ 0{,j} command
which sets the input impedance for external
triggers.)

TS {i}
Trigger Slope set to falling (i=0) or Rising Edge
(i=1). This command selects the slope condition for
external triggers. It is used with the TM, TL and TZ
commands to specify the conditions for an external
trigger. Example: the command "TM 1; TL -1.2; TS
1; TZ 0,0" specify the external trigger mode, a
trigger level of -1.2VDC, a positive trigger slope,

15

and a trigger input impedance of 50Ω to ground.
These trigger conditions would be appropriate
for triggering on the rising edge of an ECL logic
pulse (if it is able to drive a 50Ω load to
ground.)

TZ 0{,j}
Set the input impedance of the external trigger
input to 50Ω (j=0) or high impedance (j=1).
Example: the command "TZ 0,1" will set the
input impedance to 1 MΩ, the command "TZ
0,0" will set the input impedance to 50Ω.

SS
Single-Shot trigger if Trigger Mode = 2. Each
time this command is issued, a new delay cycle
will be initiated (if one is not already in
progress) provided that the single shot trigger
mode has been selected. Example: the
commands "TM 2; SS; SS; SS" will place the
instrument in the single-shot mode and trigger it
three times.

BC {i}
Burst Count of i (2 to 32766) pulses per burst.
This command is used to specify the number of
pulses, which will be in each burst of pulses
when in the burst mode. The Trigger Rate and
Burst Period commands are also used to
completely specify the burst mode of operation.
Example: the command sequence "TM 3; TR
1,1000; BC 4; BP 10" selects the burst mode,
sets the trigger rate to 1000Hz, and specifies 4
pulses per burst. Each burst is separated by 10
triggers, so that a new burst will start every
10ms.

BP {i}
Burst Period of i (4 to 32766) triggers per burst.
This command specifies the number of triggers
between the start of each burst of pulses when in
the burst mode. The burst period must always be

at least one larger than the Burst Count. Example:
the command "TM 3; TR 1,1E5; BC 100; BP 101"
sets the burst mode of operation with a trigger rate
of 100KHz. There will be 100 pulses in each burst,
one trigger will be skipped, and a new burst of
pulses will start.

STORE and RECALL COMMANDS

ST i
Store all instrument settings to location i=1 to 9.
This command allows nine complete setups to be
stored in the instrument's nonvolatile RAM. All of
the instrument's settings are stored, even those that
are not currently active: for example, the trigger
level for external triggers will be stored even though
the instrument may be operating on internal trigger.
Example: the command "ST 3" will save all the
instrument settings to the third storage location.

RC i
Recall all settings from location i=1 to 9. Default
settings may be recalled from location 0. (See the
CL command for the values of the default settings
that are recalled from location 0.) Example:the
command "RC 3" will recall all of the instrument
settings which were last stored by the ST command
to location 3. The display will show the menu item
that was active when the ST 3 command was
executed. It is possible that the memory contents
of the stored settings were corrupted between the
time they were stored and when they were recalled.
If this happens, the message "Recall Error" will be
displayed on the LCD and bit 6 of the Error Status
byte will be set. Example: The command sequence
"RC 3; ES 6" would recall location 3 and check bit 6
of the Error Status byte. If a "1" is returned by the
"ES 6" command, then the stored values were found
to be corrupted, and so the instrument setting will
not be changed. Memory contents may be lost if the
Lithium battery is defective or if large line transients
occur.

16

TROUBLESHOOTING

To start, make sure that the power entry module
on the rear panel is set for ac line voltage in
your area, and that the correct fuse is installed.
The programmed voltage may be seen through a
window when the power entry module is viewed
from the bottom of the unit. Verify that the line
cord is plugged all the way into the power entry
module, and that the power button on the front
panel is pressed "in".

When the ac power is applied, you should be
able to hear the fan: the unit will not function
properly if the fan is not operating or if the side
or bottom vent holes are blocked.

Set the rear panel switch "down" to select the
INT timebase. If this switch is "up", and a
reference is not applied, then the error message
"Ext Clk Error" will appear on the LCD.

will blink once each time the "EXC" key is pressed.
Now press the left arrow key (the "4" key) twice to
select the Internal trigger source. The default trigger
rate is 10 kHz, so the TRIG and BUSY LED's will
now glow steadily. Trigger an oscilloscope on the
rising edge of the T0 output, and use the scope to
look at the output from channel A on the 1µs per
division scale.

The default time delays are all zero. Press the
DELAY Menu Key to show the A delay setting.
Use the left/right cursor keys to position the cursor
beneath the 1µs digit (seventh from the right). Use
the up cursor key to increment the delay in 1µs
increments. The rising edge of the A output will
move 1µs later each time the "up" cursor key is
pressed. The RATE error LED will come on if the
delay setting exceeds 99µs, as the trigger period is
100µs (10kHz) and 1µs is required for the reset
cycle. If channel A is set for a longer delay than any
of the other channels, its pulse will have a constant
pulse width of about 800ns.

LCD CONTRAST

If there are no characters on the LCD, or the
contrast is very poor, adjust the contrast with the
two right most keys (the ones with the gray
up/down arrows). The up arrow will increase the
contrast, the down arrow will decrease the
contrast when the keypad is in the cursor mode.

COLD BOOT

If the instrument turns on, but is completely
unresponsive to the keyboard, then the RAM
contents may have been corrupted causing the
instrument to "hang". To remedy this situation,
turn the unit off, then hold down the BSP
(backspace) key down and turn the unit back on
again. This procedure initializes the RAM. User
calibration parameters will be overwritten by the
factory calibration parameters and GPIB address
will be set to 15.

QUICK TEST

Unplug all cables from the unit and recall the
"default" settings by pressing the "RECALL"
menu key, the "0" key, and the "EXC" key in
sequence. The trigger menu will appear on the
LCD with the cursor under "Ss" for single shot.
Press "TRIG" to select this mode. To trigger the
unit once, press the "EXC" key. The TRIG and
BUSY LED's on the left side of the instrument

OUTPUT LEVELS

If an output has only half of the programmed
amplitude, then it is very likely that a high
impedance load was specified in the OUTPUT
Menu, but a 50Ω load is attached. If an output
behaves very erratically, then it is very likely that a
50Ω load was specified, but a high impedance load
is attached. The pulse outputs, AB and CD, will
misbehave if a 50Ω load is specified for these
outputs, but a 50Ω load is attached to only one side
of the pair (i.e., to the AB output but not to the -AB
output).

JITTER

The most common causes of excess jitter are (1)
incorrect external trigger threshold setting, (2) noise
or amplitude fluctuations on the trigger input, (3)
insufficient or excessive trigger amplitude, (4)
blocked or stalled cooling fan, or (5) triggering at
too high a rate. The instrument is specified to have
a jitter of 50ps + 0.01ppm of the delay (rms). The
peak-to-peak jitter, as seen on an oscilloscope, is
approximately four times the rms jitter, hence one
would expect to see about 200ps peak-to-peak on an
oscilloscope for short delays.

17

GPIB PROBLEMS

The first requirement for GPIB operation is to
properly attach GPIB cable and to specify the
correct address for the instrument. The default
GPIB address is 15, but any address between 1
and 30 may be set from the front panel. To
check the GPIB address, press the GPIB menu
key twice. A new GPIB address may be entered
by keying in the number and pressing the EXC
key.

The DG535 will respond to commands only if it
is addressed and the Remote Enable line (REN)
is asserted. When this happens, the front panel

goes to the REMote state, which disables all of the
keys except the keyboard mode key, which allows
the user to leave the REMote state.

The program can prevent users from using the
keyboard by asserting the Local-Lockout state
(LLO).

Different GPIB controllers expect different "string
terminators" to finish each response from an
instrument. The default GPIB terminator for the
DG535 is a carriage return and a linefeed with an
EOI. The "GT" command may be used to change
the GPIB terminator if your controller requires a
different one.

18

CALIBRATION

CALIBRATION PROCEDURE

There are hundreds of bytes of calibration data
in ROM which are determined when the
instrument is calibrated at the factory. Most of
these calibration bytes will never need to be
adjusted: they correct for unit-to-unit variations,
which will not change with aging. Other
calibration bytes may need to be adjusted to re­calibrate the instrument.

All of the calibration bytes are stored in ROM,
however, those which may need to be adjusted
are also stored in nonvolatile RAM. The RAM
bytes are the values that are used in the
operation of the instrument. These bytes are
transferred from ROM to RAM when (1) the
unit is first calibrated, (2) if the RAM data is
found to be corrupted, or (3) by a request to
"Recall Factory Cal" in the calibration menu.
Only the bytes that are stored in RAM may be
modified by the end user in the calibration
procedure.

The procedure for the adjustment of these
calibration bytes is detailed here. The
calibration bytes are used to minimize jitter,
adjust the full-scale analog delays to 12.50ns,
adjust the offsets and amplitudes of the output
drivers, adjust the trigger threshold offset, and
to set the optional TCXO time base to exactly
10MHz.

Any part, or all, of the calibration procedure
may be done. If only an adjustment of the
timebase is desired there is no need to do the
entire calibration procedure. If your calibration
attempt only makes things worse, you have the
option of recalling the factory calibration
constants to restore the RAM values to their
factory settings.

REQUIRED EQUIPMENT

A 300MHz scope with 500ps/div timescale such
as a Tektronix 2465. A frequency counter with a
timebase better than 0.1ppm such as an HP
5384A with option 004 (ovenize timebase) to
calibrate the optional 1ppm TCXO. A pulse
generator to provide adjustable amplitude fast
risetime (less than 5ns) pulses such as an SRS
DG535. You will also need several 50Ω coax
cables and about ten 50Ω terminators.

Start by setting the instrument to the default settings
with a RECALL 0 EXC. This will set the trigger
mode to Single shot, the delays to zero, the output
levels to TTL, normal polarity, and configure the
output drivers for high impedance loads.

You should recall the factory calibration values. If
you are going to do only a partial calibration you
may wish to write down calibration values that have
been recently entered so that they may reentered
without redoing the calibration. To recall the factory
calibration values hold down the BSP key and press
the RECALL key. The message "Rcl Fact Cal
(EXC)" will appear. Now press the EXC button to
recall the factory calibration parameters.

Trigger Threshold Calibration

The trigger threshold calibration is required only if
the Ext Trigger input was damaged, and the input
JFET transistor, Q114, has been replaced. This
calibration adjusts the input offset for the trigger
input to cancel variations in the gate-to-source
voltage between JFETs.

___ Recall default instrument settings by

RECALL 0 EXC.

___ Select Ext trigger and set the Trigger Input

to 50 Ω ( leave the Threshold = +1.00 VDC,
Slope = + )

___ Apply a 10 KHz 0 to +1.00 VDC pulse to

the Ext Trigger Input.

___ Adjust the Trig Threshold value ( the last

item in the BSP-GPIB Menu ) so that the
TRIG LED blinks intermittently.

Optional 1 ppm Internal Timebase Calibration

This procedure should be done only if the /03
optional 1ppm TCXO oscillator is installed (refer to
the rear panel serial number tag). There is no
adjustment for the standard 25ppm time base.

___ Set the rear panel 10.000 MHz source

switch to the INT position.

___ Attach a frequency counter to the 10.0 MHz

reference output BNC. This output can
provide a 1V p-p output into a 50Ω load.

___ Press the STORE Menu Key and adjust the

value to set the reference frequency to

10.000000 MHz ± 1Hz. This calibrates the
internal time base to 0.1ppm.

19

CALIBRATION MENUS

To access the calibration menus you must hold down the BSP key then press a menu key. Each menu key
is used to access a different calibration factor per the following table:

Menu Key Name

Function

TRIG Jitter Cal Minimize jitter from Ext Trig to A

DELAY Delay T0 Set T0's full scale analog delay

Delay A Set A's full scale analog delay (do not alter this value)
Delay B Set B's full scale analog delay
Delay C Set C's full scale analog delay
Delay D Set D's full scale analog delay

GPIB Amplitude T0 Adjust T0's amplitude

Amplitude A Adjust A's amplitude
Amplitude B Adjust B's amplitude
Amplitude AB Adjust AB's amplitude
Amplitude C Adjust C's amplitude
Amplitude D Adjust D's amplitude
Amplitude CD Adjust CD's amplitude

Trigger Thres Calibrate Ext Trig Input threshold

OUTPUT Offset T0 Adjust T0's output offset

Offset A Adjust A's output offset
Offset B Adjust B's output offset
Offset AB Adjust AB's output offset
Offset -AB Adjust -AB's output offset
Offset C Adjust C's output offset
Offset D Adjust D's output offset
Offset CD Adjust CD's output offset
Offset -CD Adjust -CD's output offset

STORE Freq Cal Set optional TCXO to 10.000000 MHz

RECALL Rcl Fact Cal Press EXC to recall factory calibration

Output Amplitude Calibration

This procedure is used to calibrate the amplitude
of the front panel output drivers. You will adjust
calibration values to get a -0.800 VDC pulse
into a high impedance load on the T0, A, B, C,
D, AB and the CD outputs.

___ Recall default settings: RECALL 0

EXC

___ Use the TRIG Menu key to select Int

trigger. Press TRIG again to set the rate
to 100 KHz.

___ Use the DELAY Menu key to set the

___ Use the OUTPUT Menu key to set all the

outputs for High-Z loads, NIM logic levels.
(between 0 and -0.8 VDC.) Do this for T0,
A, B, AB, C, D and CD outputs.

For each of the outputs T0, A, B, AB, C, D and CD:

___ Connect the output to the oscilloscope

input (1 MΩ input, 200 mV/div sensitivity ).

___ Hold down the BSP key and press the GPIB

key to access the amplitude calibration
factor for the corresponding channel.

___ Use the Up/Down cursor keys to adjust the

amplitude of the output to -0.800 VDC.

delays for channel B and channel D to
5 µs.

20

Output Offset Calibration

This procedure is used to calibrate the offset of
the front panel output drivers. You will adjust
calibration values to get zero offset into a high
impedance load on the T0, A, B, AB, -AB, C, D,
CD and the -CD outputs.

The jitter from the External Trigger input to any
output (T0, A, B, C or D) should be less than 50 ps
rms. On a non-intensified fast oscilloscope triggered
at 10 KHz, a 50 ps rms jitter will appear as about
200 ps peak-to-peak jitter. Careful attention to
trigger levels and termination impedances is
required to observe this small jitter.

___ Recall default settings: RECALL 0

EXC

___ Use the TRIG Menu key to select Int

trigger. Press TRIG again to set the rate
to 100 KHz.

___ Use the DELAY Menu key to set the

delays for channel B and channel D to 5
µs.

___ Use the OUTPUT Menu key to set all

the outputs for High-Z loads, NIM logic
levels (between 0 and -0.8 VDC). Do
this for T0, A, B, AB, C, D and CD
outputs.

For each of the outputs T0, A, B, AB, -AB, C,
D, CD and -CD:

___ Connect the output to the oscilloscope

input (1 MΩ input, 200 mV/div
sensitivity ).

___ Hold down the BSP key and press the

OUTPUT key to access the Offset
calibration value for the corresponding
channel.

___ Use the Up/Down cursor keys to adjust

the offset of the output ( i.e. the top of
the -0.800 V pulse ) to zero.

Jitter Calibration

This procedure is used to minimize the timing
jitter of all the outputs with respect to an
external trigger. Apply a fast risetime ( <3 ns )
+2 V pulse with a 10 KHz repetition rate to
External Trigger input of the DG535 under test.
The same pulse should also go to the CH 1 input
of the oscilloscope. A good way to do this is to
use the T0 output from another DG535, which
has been set to drive a 50 Ω load to TTL levels.
Place a tee directly on this output, with one
cable to the DG535 under test, and the other
cable to the oscilloscope. Both cables should be
terminated into 50 Ω. With this arrangement the
T0 output sees a 25 Ω load, and so the pulse
amplitude will be 2 V.

DG535 settings:

___ Recall default settings with RECALL 0

EXC

___ Select Ext trigger: +1.00 V threshold,

+ slope, 50 Ω Term
___ Set Delay A = 100 ns, B, C, D to 1 µs
___ Connect the A output to the oscilloscope's

CH 2 input

Scope settings:

___ CH 1 and CH 2 inputs both terminated into

50 Ω
___ Trigger on CH 1 with trigger threshold set

to +1.00 V
___ 500 mV/div sensitivity on both channels.
___ Main timebase set for 50 ns/div
___ Delayed timebase set for 5 ns/div
___ Center CH 2 trace and horizontal expand

x10 to 500 ps/div
___ Change CH 2 sensitivity to 200 mV/div

Jitter Cal Factor

___ Hold down the BSP key and press the TRIG

key to access the Jitter Cal factor.
___ Adjust the Jitter Cal factor to minimize the

jitter from the External trigger to the A

delay output.

Delay Cal Factors

For each of the channels T0, B, C and D (not A):

___ Set the delay for the selected channel to

100 ns, all other delays to 1 µs. ( Skip this

step for T0 )
___ Connect the selected delay to the CH 2

input of the oscilloscope.
___ Hold down the BSP key and press the

DELAY key to access the delay factor for

the corresponding delay output.
___ Adjust the delay factor to minimize the jitter

between the External trigger and the delay

output

21

CIRCUIT DESCRIPTION

The DG535 has three printed circuit boards. The
"top" printed circuit board (Figure 8) contains
the unregulated power supplies, microprocessor,
GPIB interface, and the slow counters
(<20MHz) that are used in each of the four time
delays. The "bottom" PCB (Figure 9) contains
the 80MHz PLL reference clock, ECL counters
which are used in each of the four time delays,
jitter compensation circuits, analog delay
circuits, trigger circuits, and the fast rise time
output line drivers. The "front" PCB (Figure 10)
holds the key pad and status LED indicator
lamps. The electroluminescent back lit LCD is
mounted above the "front" PCB. A block
diagram for the DG535 is depicted in Figure 6.

MICROPROCESSOR SYSTEM

The DG535 is controlled by a Z-80B
microprocessor (U303) which is clocked by a
5MHz source which is derived from the 80MHz
PLL clock on the "bottom" PCB. The unit's
firmware resides in a 27128 UVEPROM
(U402). This ROM also contains the calibration
bytes that were determined when the unit was
manufactured. The system uses 8K Bytes of
RAM (U403). While operating, the supply
current to the RAM comes from the +5VDC
supply via D501. When the power is turned off,
a Lithium battery provides power to the RAM
via D502 (to retain the instrument settings) and
RESET is asserted which disables further chip
selects which are normally routed to the RAM
via Q501.

controls the eight status LED's. The eight switch
lines, SWR1-SWR8, are normally held low by
RN701. A key press is detected by scanning the key
pad with the REM, NUM and CURS LED control
lines and reading the switch input port. The diodes
D709, D710, and D711 prevent simultaneous key
presses from shorting out two LED control lines.

LCD DISPLAY

The connector to the front panel LCD, J14, ties
directly to the Z-80's data bus. Besides the eight data
lines on J14, there are two address lines, a chip­select, a display contrast control, +5VDC and
ground. The 120 VAC required for the back lit
electroluminescent display are wired directly to the
120VAC primary tap on the transformer: use
caution to avoid electric shock.

OUTPUT PORTS ON THE TOP PCB

The Octal Buffer U408, a 74HC244, is used to
buffer the Z-80's data bus to the six octal output
ports and six LSI counter/timer IC's which are on the
"top" PCB, and to the 40 pin connector which goes
to the "bottom" PCB. This data bus buffer is only
active during I/O requests by the Z-80.

Octal Latch Description

U202 Preset data for HC191's (A&B)
U203 Preset data for HC191's (C&D)
U204 Internal rate generator control
U409 Front panel LED's
U410 Output impedance control
U411 Polarity and trigger control

IEEE-488 INTERFACE

The interface to the IEEE-488 is provided by
U302, a TMS9914A GPIB controller. U301 and
U401 are the line receiver/drivers which
interface the controller IC to the IEEE-488 bus.
The data bus driver is configured with open
collector outputs. The controller IC handles all
of the handshaking requirements to the bus, and
interrupts the microprocessor if commands or
data are sent to the instrument.

KEY PAD and LED INDICATORS

The "front" PCB, which holds the key pad and
the status LED's is connected to the "top" PCB
by a 20 pin ribbon cable. The octal latch, U409,

Each of the six LSI counter/timer IC's (uPD8253)
have three independent 16 bit counter channels.
Three channels are used in each of the four digital
delays, and the rest are used to generate the 1KHz
timer interrupt and to synthesize the clock for the
internal rate generator.

OUTPUT PORTS ON THE BOTTOM PCB

There are two Octal Latches, U806 and U807 (on
the bottom PCB), which are used to preset the ECL
counters in each of the four delay channels. Another
octal latch, U813, controls four 1:8 analog
multiplexers to refresh 30 sample and hold circuits
with the output of the 12-bit D/A converter. These
30 analog voltages are used to control amplitudes
and offsets, analog time delays, external trigger

22

PORT ADDRESS DECODING

I/O port decoding is done by U404 (74HC154) and U308 (74HC138). These IC's provide active low
outputs which are used to strobe input and output ports, and to provide reset strobes.

Hex Name

Description

B8 CTR6_CS LSI Counter/Timer Chip select
B0 INT_CLR Clears timer interrupt flag
A8 Spare to top PCB
A0 FLAG_CLR Clears OVERRUN and TRIGGERED Flags
98 P11_CS HC Counter preset register (C&D)
90 P10_CS HC Counter preset register (A&B)
88 P9_CS ECL Counter preset register (C&D)
80 P8_CS ECL Counter preset register (A&B)
78 P7_CS Output termination control
70 P6_CS Key pad input strobe
68 P5_CS Front panel LED indicators
60 P4_CS Misc status bits input strobe
58 P3_CS Internal rate generator control
50 P2_CS Analog MUX select
48 P1_CS Output polarity and trigger source
40 DISP_CS Front panel LCD select
38 Spare to bottom PCB
30 DAC_CS Write strobe to 12bit D/A
28 CTR5_CS LSI counter Chip select
20 CTR4_CS LSI counter Chip select
18 CTR3_CS LSI counter Chip select
10 CTR2_CS LSI counter Chip select
08 CTR1_CS LSI counter Chip select
00 IEEE_CS GPIB controller Chip select

The two eight-bit input ports on the microprocessor's bus, U406 and U407, are 74HC244 Octal buffers
which are used to read the front panel key pad and miscellaneous status bits from the instrument.

Status Bits (U406) Name

B7 Always One
B6 Always One
B5 TIMER_INT 1KHz Clock Tick
B4 DROPOUT Low Power Supply
B3 UNLOCK 80MHz PLL Error
B2 BUSY Timing Cycle in Progress
B1 OVERRUN Trigger Rate too Fast
B0 TRIGGERED Triggered at least once

INPUT PORTS

Description

23

threshold, reference oscillator frequency,
display contrast, and to calibrate assorted
current sources. Each of the 30 D/A sample and
hold circuits is refreshed for 1ms every 30ms.

DIGITAL TO ANALOG CONVERTER

The 12-bit D/A converter is loaded by the Z-80
four bits at a time. The current output from the
D/A is converted to a voltage by 1/4 of U402
with a full-scale range of 0 to -10.24VDC. The
D/A voltage is offset and/or attenuated by 2/4,
3/4 and 4/4 of U402.

The output of 4/4 of U402, which controls the
amplitudes of all of the front panel outputs, is
referenced to the -6.0VDC power supply. This is
so that variations in the -6.0VDC supply will not
change the amplitude current source.

The output of 2/4 of U402, which controls the
current sources that calibrate the analog time
delay circuits, is referenced to the +15.0VDC
supply. This is done so that variations in the
+15.0VDC supply will not change the
calibration of the analog time delays.

TIMEBASE

The basic time interval for all the digital delays
is an 80MHz oscillator. The 80MHz is
generated by a varactor-tuned VCO which is
phase locked to a 10.000MHz reference. There
are three sources for the 10.000MHz reference:
a standard 10.000MHz reference with a 25ppm
maximum error over 0 to 50°C, an optional

10.000MHz reference with a 1ppm maximum
error, or a user supplied source. The optional
1ppm oscillator is powered from a doubly
regulated +12VDC source (U509) and is
varactor tuned by a D/A output to better than
1Hz accuracy. (See calibration procedure to set
the frequency.)

The internal reference is selected when the rear
panel switch is in the INT position. In this
position, the 10.000MHz source is shifted to
ECL levels by Q502 and Q503 and passed to the
ECL phase comparator U502, a MC12040 . The
output of the phase comparator is filtered by the
two-pole active low-pass filter (U503 and
passive components). The filter output is
buffered by Q504 and used to control the
frequency of the varactor-tuned LC-tank

oscillator. The window comparator, U507, is used to
detect gross frequency errors as might be expected if
an external reference has insufficient amplitude or a
frequency more than a few percent off the nominal

10.000MHz.
The 80MHz output serves as the basic unit of time
in all of the digital delays. The 80Mhz is divided by
8 to generate a 10MHz signal which is used to close
the phase-locked-loop. The 10MHz ECL signal is
shifted to TTL levels by 3/4 of U107, and buffered
by Q505, to provide a nominal 1Volt square wave
into 50Ω at the rear panel 10.000MHz BNC. The
10MHz TTL signal is also used as the clock to the
frequency synthesizer circuits.

FREQUENCY SYNTHESIZER

The "bottom" PCB provides a 10 MHz frequency
source to the "top" PCB, which is used as the
reference for all synthesized frequencies on the
"top" PCB. The 10MHz source is divided by two
(1/2 U101) to generate the 5MHz clock for the Z-80.
The 5MHz is in turn divided by 2 (2/2 U101) to
provide a 2.5MHz clock to 3/3 of U209 (a uPD8253
Counter/Timer) which is divided by 2500 to produce
a 1KHz clock to the timer interrupt flag, 1/2 U307 (a
74HC74).

U112 divides the 1KHz clock to generate a 100Hz
clock, which is the reference source for the internal
rate synthesizer. A CMOS VCO/PLL (U110) is
phase locked to an integer multiple (x1000 to
x10,000 per 1/3 U210) of the 100Hz reference. The
VCO output (100KHz to 1MHz) is then divided by
two more LSI counter/timer channels (2/3 and 3/3 of
U210)to generate any frequency between 0.001Hz
and 1.000MHz.

LINE TRIGGER

The 8 VAC tap on the power transformer is
discriminated by the comparator 1/4 of U502. This
line trigger is then synchronized to the 80 MHz
timebase by the flip-flop, 2/2 of U307, which is
clocked by the 2.5 MHz signal, which has been
divided down from the 80 MHz clock.
Synchronizing the trigger to the 80 MHz timebase
reduces the jitter of the delay outputs to about 25 ps
rms.

TRIGGER SELECTION

Three control bits are used to select the operating
mode of the internal rate generator. These bits are

24

set according to the selection, which is made in
the TRIG Menu. If EXT trigger is selected, then
the output of the rate generator is set to either 0
or 1 in order to control the polarity of the
external trigger. If an INT trigger is selected,
then either the VCO or the divided VCO is
selected as the output to trigger the delay
generator. If a BURst mode is selected, then the
VCO or divided VCO is gated through U310 to
produce a burst of triggers. The number of
pulses in the burst is controlled by 2/3 of U209
and the interval between bursts is controlled by
1/3 of U209. The dual D-type flip-flop, U109, is
used to synchronize the gate to U310 so that the
falling edge of the output triggers is not affected
by the propagation delay through the LSI
counters.

Control Bits

Burst Clk_Sel Int_Trig Output

000VCO
010VCO/N
0 0 1 Line Trig
0 1 1 0 (Trig on Fall)
1 0 0 Burst VCO
1 1 0 Burst VCO/N
1 0 1 Line Trig
1 1 1 1 (Trig on Rise)

TRIGGER CIRCUITS

The digital delay generator may be triggered
internally or externally. To trigger externally,
the control bit EXT_TRIG is set high (Pin 19,
U411 and Pin 12 on J16), and TRIG_POL is set
high to trigger on rising edges or low to trigger
on falling edges of the external trigger input.

External triggers are discriminated by the fast
Schmitt Trigger which compares the external
trigger to the TRIG_THRES voltage from the
D/A. The input impedance of the EXT TRIG
input is 50Ω if R101 is shorted to ground by
Q101 which may be turned on by a high level at
TRIG_TERM. The comparator input, Q114, is
protected from excessive inputs by the series
impedance of R104 and R107. The input offset
voltage (due to the difference in Vgs between
Q114 and Q115) is corrected by a calibration
byte in the unit's ROM. The source follower
outputs of the JFETs are applied to the

differential pair Q102 and Q103; the outputs of this
differential pair is applied to the differential pair
formed by Q104 and Q105 which shifts the
comparator's output to ECL levels. A 1KΩ resistor
from the collector of Q104 to the source of Q114
provides about 100mV of hysteresis.

The ECL output from the comparator may be
inverted by the exclusive-or gate, 1/2 of U102,
under the control of the TRIG_POLarity bit. If
TRIG_POL=1 then the exclusive-or gate inverts the
comparator's output so that a rising edge at the
trigger input will trigger the unit.

If INTernal trigger is selected from the trigger menu,
then EXT_TRIG will be set low, forcing the output
of the comparator to an ECL low level, and the unit
may be triggered by a falling edge of INT_TRIG.

A Single Shot trigger is done by bringing the
INT_TRIG/TRIG_POL bit low once, while the
EXT_TRIG bit is low. All trigger modes may be
stopped by setting the TRIG_INH bit (Pin 5 of
U411) to a high level.

TRIGGER SEQUENCE

The delay cycle is initiated when the ECL flip-flop,
1/2 U103, is clocked low. The output of this flip­flop is used to: (1) set TTL_LATCH high so that the
processor can see that a timing cycle is in progress,
(2) commute the current in the differential pair of
Q106 and Q107 to turn off the circuit which
precharges the jitter compensation voltage, (3) start
the leading edge of the "Jitter Pulse" which will
measure the time between the trigger and the rising
edge of 80MHz clock, and (4) start a "1" shifting
through the two-bit shift register formed by U105.
The two-bit shift register provides an output which
is synchronous with the rising edge of the 80MHz
clock. This output is used to terminate the jitter
pulse and to enable the five or-gates which
multiplex the 80MHz clock to the ECL counters for
channels T0, A, B, C, and D.

OVERVIEW OF THE DELAY CHANNELS

The basic time interval in the digital delay generator
is the 80MHz clock, which has a period of 12.5ns.
Time intervals from 0 to 1000s require that each
channel be able to count from 0 to 80,000,000,000
cycles of the clock. The high count rate requires
using ECL, however, the large number of counts
precludes using ECL exclusively.

25

Each of the four delay channels behave like a 37
bit presettable synchronous binary ECL counter.
Each channel actually consists of a 2 bit ECL
counter (a 10131 dual flip-flop), a 4 bit HC
counter (a 74HC191), and three 16 bit LSI
counters (uPD8253's). To overcome the long
propagation delays in the HC and LSI counters,
there are two ECL flip-flops that re-synchronize
the counter output to the 80MHz clock.

Throughout the instrument there are many
places where signals must be converted between
ECL and HCMOS levels. To convert from ECL
to HCMOS, a 10125 Quad ECL to TTL
converter is used, with a resistor pull-up. To
convert from HCMOS to ECL, a three-resistor
network is used.

Analog time delay circuits provide delays from
0 to 12.495ns so that delays may be set with a
5ps resolution. These analog delays also
compensate for the jitter in the digital delay
output which arises from the uncertainty in the
phase of an external trigger with respect to the
80MHz internal clock. Without jitter
compensation this uncertainty would give rise to
a 12.5ns jitter.

JITTER COMPENSATION

The purpose of the jitter compensation circuit is
to produce a voltage, which is proportional to
the time between the trigger and a rising edge of
the 80MHz clock. This voltage is used to
modify the analog delays on each channel so as
to eliminate this large component of output
jitter.

The jitter voltage is produced by integrating a
constant current source on a capacitor for the
time that the jitter pulse is present. The constant
current source, Q113, is controlled by a D/A
output from the processor. The D/A voltage,
which is stored on C108, is compared to the
voltage across the resistor R137. The correct
D/A voltage is determined in final calibration of
the instrument and is stored in the unit's ROM.

A very low leakage current switch formed by
Q111 and Q112 is controlled by
JITTER_PULSE. While the jitter pulse is on, all
of the current is drawn from the integrating
capacitor, C106. The voltage on C106 will be
reduced by exactly 100mV per nanosecond of

jitter pulse. The voltage on C106 is buffered by
Q109, a J310 FET, level shifted by D102, a 12V
Zener, to drive the base of the emitter-follower,
Q110. The emitter of Q110 is the source of the jitter
compensation voltage for all of the analog delay
circuits. The JFET and Zener are biased by the
constant current source, Q116, a JFET run at
Id=Idss.

Small leakage currents can cause the jitter voltage to
drift. The dual op-amp, U112, prevents the jitter
voltage from drifting so far as to cause a problem
with the analog delay circuits. If the jitter voltage
drifts up beyond the safe limit, 2/2 of U112 will
lower the drain voltage to Q109 to stop the drift.
(The safe upper limit threshold is reduced during the
timing cycle by the size of the step at the collector
of Q106. In this way, the drift limit circuit is not
active while the timing cycle is not active, allowing
the precharge of the integrating capacitor.) If the
jitter voltage drifts down below -7.4VDC, then 1/2
of U112 will raise the voltage on the source of Q116
and so stop the downward drift.

JITTER PRECHARGE AND S&H

Three reference voltages are generated by the op­amp, 1/4 of U312. The input to this circuit is the
+10.000VDC reference. The op-amp is configured
with a gain of -1.07 to produce an output of -

10.70VDC. The output is divided to produce
reference levels of -7.40 and -4.00VDC.

The -4.0VDC is the pre-trigger level for the jitter
voltage. Before the trigger, ECL_LATCH is low and
so Q107 is on, and so its collector is about 3Volts
above the -15VDC supply. This will provide about
1mA to the bias input (pin 16) of the Operational
Transconductance Amplifier, 1/2 U111. The OTA
will source or sink current to the integrating
capacitor to bring the jitter voltage to -4.0VDC.
When the unit is triggered, ECL_LATCH goes high,
turning off the OTA.

The integrating capacitor, C106, needs to be small
so that its voltage may change appreciably during
the brief jitter pulse. However, small leakage
currents will rapidly discharge such a small
capacitor. To eliminate this problem a much larger
capacitor, C104, is charged by an OTA , 2/2 of
U111, to provide a charge reservoir. This sample
and hold OTA is active only during the first few
microseconds after the trigger since the bias current
to the OTA drops off as C103 discharges.

26

KICKPULSE

OTA's (Operational Transconductance
Amplifiers) are used throughout the system to
precharge capacitors when the delay cycle is
complete. The maximum steady state bias
current to these devices is only a few milliamps,
so, in order to rapidly recharge these capacitors,
a "kick pulse" isused to boost the current by
several milliamps at the start of the reset cycle.
This "kick pulse" is generated by differentiating
the 800 ns GATE pulse, amplifying it with an
OTA, and buffering with a Darlington pair.

The way in which the LSI counters are used depends
on the number of cycles which must be counted. For
very short delays, the output "A/N" may be preset
high by setting the output of the last LSI counter,
U206 pin 17, low. In this case, the LSI counters are
not used in the delay cycle.

For delays which require 1 to 32767 ticks of the HC
counter in the delay, the output of the LSI counter
which is connected to the or-gate is set low,
allowing the last LSI counter to count the HC ticks.
The last LSI counter's output goes low on the
terminal count.

THE T0 DIGITAL DELAY

The T0 output is similar to the A, B, C, and D
output, except the delay cannot be adjusted.
When a trigger is received, 4/4 of U104 gates
the 80 MHz clock to U201T. The first rising
edge of the 80 MHz clock sets Q-bar of 1/2
U201T, which clocks 1/2 of U103, asserting the
T0-CNT to indicate the completion of the digital
count for the T0 delay. The analog delay portion
of the T0 delay is identical to the analog delays
of the other channels.

CHANNEL A's DIGITAL DELAY

The digital delays are essentially identical for all
of the channels; the references in this
description will be to channel A.

When a trigger is received, an 80MHz reference
is provided by the ECL OR Gate, U106, to the
two-bit ECL counter, U201A. The high bit of
this counter is shifted to TTL levels by 1/4 of
U203 and passed to the "top" PCB. This bit,
"A/4", is used as the clock input to the 4-bit
binary counter U304 (a 74HC191). The high bit
of the HC counter, "A/64", is used as a clock to
the uPD8253 LSI counters. The maximum clock
frequency to the HC counter is 20MHz and the
maximum clock frequency to the LSI counters is

1.25MHz.

The quad 1:2 multiplexer, U309, passes the A
inputs to the Y outputs during the count cycle.
During the 820ns reset cycle, this multiplexer
sends the LOAD pulse (at the B input) to the
LSI counters' clock inputs to reload the counters
for the next timing cycle.

For delays which require more than 32767 ticks of
the HC counter, the LSI counter which is clocked by
the inverted output of the HC counter, is
programmed to divide by 32768. The next LSI
counter's output will go low after 1 to 65535 ticks of
the first LSI counter thus gating the HC counter's
output to the last LSI counter. The last LSI counter's
output goes low after 1 to 65,535 counts.

The output from the HC counter (A/64) and the
inverted output from the last LSI counter (A/N) are
passed to the bottom PCB for synchronization to the
80MHz reference oscillator. The ECL flip-flop, 1/2
U202A, is clocked by A/64; if the D-input (A/N) is
high (indicating that the LSI count is complete) then
the Q-bar output of the flip-flop will go low. This
eliminates the jitter of the LSI counter, as the ECL
output is synchronous with the HC counter's
transition. The final synchronization is done by the
2/2 of U202A. This flip flop is clocked by the ECL
output of the synchronous two-bit ECL counter
(20MHz toggle rate). Its output will change states
synchronously with the first clock input after the Q­bar output of the 1/2 of U202A goes low. The
outputs of 2/2 of U202A going low signal the end of
the digital count. The channel will stop counting and
the analog delay for the channel will be started.

ANALOG DELAYS

The analog delays for each output, T0, A, B, C and
D, are essentially the same. Circuit references to
channel A will be used in this description.

The analog delays are controlled by charging a
capacitor (C309A) with a constant current source
(Q304A). The constant current source, and so the
delay calibration, is controlled by D/A output
(A_CAL) from the processor. When the digital

27

portion of the delay is complete, A_CNT and its
complement are asserted which causes the
differential pair formed by Q305A and Q306A
to switch the current source away from the OTA
and to the capacitor. The OTA is used to
precharge the capacitor to a programmed
voltage: changing the voltage will change the
duration of the analog delay. The current source
is calibrated to charge the capacitor at a rate of
100mV/ns, the same rate coefficient that is used
in the jitter compensation circuit. The
capacitor's voltage is the input to a differential
comparator formed by Q307A and Q308A. The
jitter voltage is applied to the other side of the
comparator. When the capacitor's voltage equals
the jitter compensation voltage, the analog delay
times-out. In this way, the jitter of the trigger
with respect to the internal 80MHz clock is
canceled.

The output of the differential comparator (the
collector of Q308A) is applied to the ECL OR
gate, 1/4 of U303. The non-inverting output of
the OR gate is applied to the ECL exclusive OR
gate which can invert polarity of the output
pulse. The inverting output of the ECL or gate is
wire-ORed with the outputs from the other
channels. The reset cycle is started when this
wire-ORed signal goes low, indicating that all of
the delay channels have timed out. During the
reset cycle, ECL_HOLD is asserted, holding the
outputs of the ECL OR gate high.

RESET CYCLE AND STATUS BITS

An 800ns reset cycle is initiated by TTL_EOD
when all of the delay channels have timed-out.
TTL_EOD clocks the 2/2 of U311 high,
asserting the GATE pulse. About 200ns later,
C301 will be discharged by R302 and P302, and
so the output of 1/6 of U312 will go high,
asserting the LOAD pulse. About 250ns later,
the LOAD pulse is terminated by R304 and
P303 charging C303, which brings the output of
the 2/2 of U312 low. The GATE pulse, and so
the reset cycle, is terminated 350ns later when
C302 is discharged by R303 and P301, resetting
the flip-flop. U311 and U312 are powered from
a separate +5.0VDC regulator, U313, to prevent
noise from modulating the reset cycle timing.

The reset cycle can be initiated by the Z-80 by
asserting the CPU_RELOAD signal. CPU
reloads are required when the digital delays are

changed, so that the counters will be preset to their
new values. This signal will reset the 1/2 of U311,
presetting the 2/2 of U311 and so start the reset
cycle. The 1/2 of U311 is set immediately by the
GATE-bar signal, enabling the circuit for the next
CPU_RELOAD. Note that the HOLD pulse, which
maintains the BNC outputs in their time-out state
during a normal reset cycle, is disabled during a
CPU initiated reset cycle.

The GATE and LOAD pulses are used throughout
the system to preset the ECL, HC, and LSI counters
and to precharge the capacitors in the analog delays
and jitter compensation circuits.

Three status bits are available to allow the processor
know the state of the delay cycle: BUSY is high if
either TTL_LATCH is high or if a reset cycle is in
progress. TRIGGERED will be high if a BUSY
occurred since the last polling of this bit.
OVERRUN will be set if the unit is triggered while
BUSY with the current timing or reset cycle. Both
TRIGGERED and OVERRUN are reset after they
are polled by the Z-80 asserting the FLAG_CLR bit.

OUTPUT DRIVERS

The output drivers for each output, T0, A, B, C and
D, are essentially the same. Circuit references to
channel A will be used in this description.

The outputs of the exclusive-or gate are shifted and
attenuated by the resistor network N301A, and used
to drive the bases of the output driver transistors
Q309A and Q310A. The common emitter current
source is switched between R321A and the output
BNC by these transistors. The amplitude of the
output pulse is set by the common emitter current
source, Q316A, which is controlled by the D/A
output A_AMP.

OFFSET CONTROL

The DC offset voltage of the outputs is controlled by
the bipolar current source formed by Q302, Q303
and the op-amps 1/4 and 4/4 of U313. This current
source is set by the D/A output, OFFSET_CNTL.

When sourcing current to the output, only Q303 is
on, and the 1/4 of U313 amplifies the differential
voltage across the 10Ω shunt resistor, R304A. This
signal is fed-back to the error amplifier, 4/4 of
U313, for comparison to the programmed level,
OFFSET_CNTL. The error amplifier drives the base

28

of Q303A through the emitter follower Q301A
for improved pulse response at high currents.

Q302A is used to sink currents from the output
BNC. The sink current is controlled by feeding
back the amplified voltage across the 10Ω shunt
resistor, R305A, to the error amplifier, 4/4
U313.

The offset current is passed to the output via
L301A. This inductor improves the high
frequency response of the current source,
maintaining constant current during output
transitions, and isolating the offset current
source from the output BNC.

IMPEDANCE CONTROL

Both the output pulse driver and the offset
current source require a 50Ω load to work
properly. In some applications the user will not
want to use a 50Ω load, and so, each channel
has a 50Ω load which may be placed on the
output. This 50Ω load consists of the 45.3Ω
resistor, R322A, and the JFET transistor,
Q311A, which has about 5Ω of channel
resistance when it is turned on by a high level
on A_TERM.

The 50Ω load is placed on the output if the user
specifies that there is a high impedance load on
the output. (The load specification is made in
the OUTPUT Menu from the front panel.) If the
wrong specification is made then the output will
have 1/2 the programmed amplitude and offset
(in the case where two 50Ω loads are on the
output), or will misbehave altogether (in the
case where no load is on the output).

GATE OUTPUT DRIVERS

The Gate Output Drivers are essentially the
same as the output drivers for channels T0, A,
B, C and D, except that there are outputs on
both sides of the output current switch formed
by Q314 and Q315. This allows the
simultaneous output of the gate pulse and its
complement for differential pulse applications.

The second output requires a second bipolar
offset current source. Both of the offset current
sources are controlled by D/A outputs from the
processor: these D/A controls are separate (to
compensate for the different input offset

voltages on the two current sources), but are
controlled together, i.e., the offset current sources
are both controlled by the same menu item from the
front panel.

POWER SUPPLIES

The unit uses a linear power supply to generate +15,
+6.0, +5.2, +5.0, -2.0, -5.2, -6.0, and -15VDC. The
line voltage enters through a power entry module,
which provides a fuse and RFI filter. The power
entry module also configures the primary of the
power transformer so that the unit can operate from
100, 120, 220 or 240VAC. The secondary voltages
of the power transformer are full-wave rectified by
BR601 and BR501 and filtered by C605, C606,
C608 and C609 to provide unregulated ±20VDC and
±9 VDC.

On the "top" PCB, the voltage regulators U501,
U503, and U601 provide +5.0, -15, and +15VDC.
There is a jumper header in the outputs of each of
these regulators to allow current measurements to be
made. The +5.0VDC regulator is bypassed by a
10Ω, 5Watt resistor to reduce the current in this
regulator. U502, an LM2901 quad comparator, is
used to generate active low signals to indicate
DROPOUT and RESET. DROPOUT is asserted if
the unregulated +9VDC drops below 7.5VDC or if
the unregulated -9VDC goes above -6.8VDC. The
DROPOUT signal generates an interrupt to the
processor to allow it enough time to store checksum
bytes on the instrument settings before power is lost.
The RESET signal is asserted for about one second
on power-up (C503 and RN2+R502) or whenever
the unregulated +9VDC is below 6.8VDC. The
RESET signal is used to reset the microprocessor,
and to protect the battery backed-up RAM when the
power is first applied or removed.

All of the unregulated voltages and the three
regulated voltages generated on the "top" PCB are
passed down the "bottom" PCB via J7. The voltage
regulators on the "bottom" PCB, U902, 903, 909,
908 and U907, provide regulated +6.0, +5.2, -2.0, -

5.2 and -6.0VDC. All of these regulators, except
U903 (+5.2VDC), have heat sinks and jumpers in
their outputs (to allow current measurements). The -

5.2VDC regulator (U908) is bypassed by a 10Ω,
5Watt resistor to reduce the current load in this
regulator. The -2.0VDC regulator, (U909) has a

6.8Ω, 5Watt resistor in series with its input to
reduce the power dissipated in the regulator. The

29

+10.000VDC reference is generated on the
"bottom" PCB.

REAR PANEL OUTPUT DRIVERS

The /02 option provides rear panel outputs for
the T0, A, B, C and D outputs with an amplitude
of 8x the corresponding front panel output. Each
of the five output drivers are the same, the
description which follows references channel
A's output.

An ECL level signal indicating the end of delay
for channel A is applied to the base of Q3A. The
amplified pulse is coupled through T1A to the
base of the Darlington pair, Q2A and Q1A. Q1A
is saturated, shorting its collector to its emitter.
The relay on the output is shown in the position

for positive output pulses. When Q1A is turned on,
the capacitors C4A and C5A, which were charged to

-20 VDC through R9A, are connected to the
capacitors C2A and C3A, which were precharged to
a voltage from - 19 to +20 VDC by the op amp 2/2
of U1. The output will pulse high from 1 to 40Volts,
depending on the precharge of C2A and C3A. The
pulse will last until the core of the transformer,
T1A, saturates.

The op amp, which precharges C2A and C3A, is a
linear differential amplifier, which senses the
amplitude current source for the corresponding front
panel output. The average current output from the
rear panel outputs is limited by the 1 KΩ charging
resistors, R5A and R6A. These resistors also reduce
the amplitude of the outputs by 2 Volts per
milliampere of output current.

30

31

Top PC Board Parts List

REF# SRS PART # VALUE DESCRIPTION
BR601 3-00062-340 KBP201G/BR-81D Integrated Circuit (Thru-hole Pkg)
BT1 6-00001-612 BR-2/3A 2PIN PC Battery
C 101 5-00131-501 560P Capacitor, Ceramic Disc, 50V, 10%, SL
C 102 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 103 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 104 5-00038-509 10U Capacitor, Electrolytic, 50V, 20%, Rad
C 105 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 201 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 202 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 203 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 304 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 305 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 306 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 307 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 310 5-00138-558 200P Cap, Monolythic Ceramic, 50V, COG, 10%
C 312 5-00017-501 47P Capacitor, Ceramic Disc, 50V, 10%, SL
C 401 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 402 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 501 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 502 5-00192-542 22U MIN Cap, Mini Electrolytic, 50V, 20% Radial
C 503 5-00040-509 1.0U Capacitor, Electrolytic, 50V, 20%, Rad
C 504 5-00192-542 22U MIN Cap, Mini Electrolytic, 50V, 20% Radial
C 601 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 602 5-00192-542 22U MIN Cap, Mini Electrolytic, 50V, 20% Radial
C 603 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 605 5-00125-520 12000U Capacitor, Electrolytic, 16V, 20%, Rad
C 606 5-00125-520 12000U Capacitor, Electrolytic, 16V, 20%, Rad
C 607 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 608 5-00124-526 5600U Capacitor, Electrolytic, 35V, 20%, Rad
C 609 5-00124-526 5600U Capacitor, Electrolytic, 35V, 20%, Rad
C 610 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 611 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 612 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
D 201 3-00226-301 1N5822 Diode
D 501 3-00004-301 1N4148 Diode
D 502 3-00004-301 1N4148 Diode
D 503 3-00226-301 1N5822 Diode
D 504 3-00226-301 1N5822 Diode
D 505 3-00226-301 1N5822 Diode
D 506 3-00226-301 1N5822 Diode
D 601 3-00198-301 1N5231B Diode
J 5 1-00039-116 5 PIN, WHITE Header, Amp, MTA-156
J 7 1-00036-116 7 PIN, WHITE Header, Amp, MTA-156
J 14 1-00032-130 14 PIN DIL Connector, Male
J 16 1-00037-130 16 PIN DIL Connector, Male
J 20 1-00035-130 20 PIN DIL Connector, Male
J 24 1-00238-161 GPIB SHIELDED Connector, IEEE488, Reverse, R/A, Female
J 40 1-00038-130 40 PIN DIL Connector, Male
P 310 4-00268-446 2.2K Pot, Under Adjust
PC1 7-00079-701 DG535-30 Printed Circuit Board
Q 501 3-00140-325 2N2369A Transistor, TO-92 Package
R 103 4-00090-401 560 Resistor, Carbon Film, 1/4W, 5%
R 104 4-00059-401 22K Resistor, Carbon Film, 1/4W, 5%
R 106 4-00094-401 6.8K Resistor, Carbon Film, 1/4W, 5%
R 201 4-00062-401 270 Resistor, Carbon Film, 1/4W, 5%
R 301 4-00027-401 1.5K Resistor, Carbon Film, 1/4W, 5%
R 309 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 310 4-00027-401 1.5K Resistor, Carbon Film, 1/4W, 5%
R 311 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 312 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 507 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 508 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 509 4-00101-401 750 Resistor, Carbon Film, 1/4W, 5%
R 510 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 511 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 512 4-00300-409 10 Resistor, Wire Wound
R 601 4-00161-407 2.49K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 602 4-00176-407 3.01K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 603 4-00187-407 4.53K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 605 4-00312-401 270K Resistor, Carbon Film, 1/4W, 5%
R 607 4-00031-401 100 Resistor, Carbon Film, 1/4W, 5%
R 608 4-00034-401 10K Resistor, Carbon Film, 1/4W, 5%
R 609 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 610 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 611 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 612 4-00065-401 3.3K Resistor, Carbon Film, 1/4W, 5%
R 613 4-00048-401 2.2K Resistor, Carbon Film, 1/4W, 5%
R 614 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
RN1 4-00270-425 1.0KX5 Resistor Network SIP 1/4W 2% (Common)
RN2 4-00297-421 100KX5 Res. Network, SIP, 1/4W,2% (Isolated)
RN3 4-00287-425 820X9 Resi stor Network SIP 1/4W 2% (Common)
RN101 4-00298-425 470X5 Resistor Network SIP 1/4W 2% (Common)

REF# SRS PART # VALUE DESCRIPTION
U 101 3-00049-340 74HC74 Integrated Circuit (Thru-hole Pkg)
U 102 3-00049-340 74HC74 Integrated Circuit (Thru-hole Pkg)
U 103 3-00171-340 74HC191 Integrated Circuit (Thru-hole Pkg)
U 104 3-00171-340 74HC191 Integrated Circuit (Thru-hole Pkg)
U 105 3-00155-340 74HC04 Integrated Circuit (Thru-hole Pkg)
U 106 3-00182-340 74HC02 Integrated Circuit (Thru-hole Pkg)
U 107 3-00040-340 74HC157 Integrated Circuit (Thru-hole Pkg)
U 108 3-00166-340 74HC153 Integrated Circuit (Thru-hole Pkg)
U 109 3-00049-340 74HC74 Integrated Circuit (Thru-hole Pkg)
U 110 3-00160-340 74HC4046 Integrated Circui t (Thru-hole Pkg)
U 111 3-00116-325 78L05 Transistor, TO-92 Package
U 112 3-00171-340 74HC191 Integrated Circuit (Thru-hole Pkg)
U 201 3-00988-340 MC74HC32AN Integrated Circuit (Thru-hole Pkg)
U 202 3-00046-340 74HC374 Integrated Circuit (Thru-hole Pkg)
U 203 3-00046-340 74HC374 Integrated Circuit (Thru-hole Pkg)
U 204 3-00046-340 74HC374 Integrated Circuit (Thru-hole Pkg)
U 205 3-00491-340 UPD71054C Integrated Circuit (Thru-hole Pkg)
U 206 3-00491-340 UPD71054C Integrated Circuit (Thru-hole Pkg)
U 207 3-00491-340 UPD71054C Integrated Circuit (Thru-hole Pkg)
U 208 3-00491-340 UPD71054C Integrated Circuit (Thru-hole Pkg)
U 209 3-00491-340 UPD71054C Integrated Circuit (Thru-hole Pkg)
U 210 3-00491-340 UPD71054C Integrated Circuit (Thru-hole Pkg)
U 301 3-00078-340 DS75160A Integrated Circuit (Thru-hole Pkg)
U 302 3-00164-340 TMS9914A Integrated Circuit (Thru-hole Pkg)
U 303 3-00162-340 Z80B-CPU Integrated Circuit (Thru-hole Pkg)
U 304 3-00171-340 74HC191 Integrated Circuit (Thru-hole Pkg)
U 305 3-00171-340 74HC191 Integrated Circuit (Thru-hole Pkg)
U 306 3-00155-340 74HC04 Integrated Circuit (Thru-hole Pkg)
U 307 3-00049-340 74HC74 Integrated Circuit (Thru-hole Pkg)
U 308 3-00037-340 74HC138 Integrated Circuit (Thru-hole Pkg)
U 309 3-00040-340 74HC157 Integrated Circuit (Thru-hole Pkg)
U 310 3-00165-340 74HC08 Integrated Circuit (Thru-hole Pkg)
U 313 3-00116-325 78L05 Transistor, TO-92 Package
U 314 3-00199-340 74HC4538 Integrated Circui t (Thru-hole Pkg)
U 315 3-00199-340 74HC4538 Integrated Circui t (Thru-hole Pkg)
U 401 3-00079-340 DS75161A Integrated Circuit (Thru-hole Pkg)
U 403 3-00157-341 8KX8-100 LOW STATIC RAM, I.C.
U 404 3-00158-340 74HC154N Integrated Circuit (Thru-hole Pkg)
U 406 3-00044-340 74HC244 Integrated Circuit (Thru-hole Pkg)
U 407 3-00044-340 74HC244 Integrated Circuit (Thru-hole Pkg)
U 408 3-00044-340 74HC244 Integrated Circuit (Thru-hole Pkg)
U 409 3-00046-340 74HC374 Integrated Circuit (Thru-hole Pkg)
U 410 3-00046-340 74HC374 Integrated Circuit (Thru-hole Pkg)
U 411 3-00046-340 74HC374 Integrated Circuit (Thru-hole Pkg)
U 501 3-00112-329 7805 Voltage Reg., TO-220 (TAB) Package
U 502 3-00185-340 LM2901 Integrated Circuit (Thru-hole Pkg)
U 503 3-00120-329 7915 Voltage Reg., TO-220 (TAB) Package
U 504 3-00167-340 LM324A Integrated Circuit (Thru-hole Pkg)
U 505 3-00167-340 LM324A Integrated Circuit (Thru-hole Pkg)
U 601 3-00114-329 7815 Voltage Reg., TO-220 (TAB) Package
Z 0 0-00096-041 #4 SPLIT Washer, Split
Z 0 0-00162-007 TO-200 UP Heat Sinks
Z 0 0-00187-021 4-40X1/4PP Screw, Panhead Phillips
Z 0 0-00261-003 TO-18 Insulators
Z 0 0-00478-055 1.5"X#30 BLK Wire, Other
Z 0 0-00514-030 TUBULAR NYLON Spacer
Z 0 1-00026-150 28 PIN 600 MIL Socket, THRU-HOLE
Z 0 7-00068-720 DG535-21 Fabricated Part
Z 0 7-00074-720 DG535-34 Fabricated Part

Bottom PC Board Parts List

REF# SRS PART # VALUE DESCRIPTION
C 101 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 102 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 103 5-00068-513 .047U Capacitor, Mylar/Poly, 50V, 5%, Rad
C 104 5-00052-512 .01U Cap, Stacked Metal Film 50V 5% -40/+85c
C 106 5-00134-529 100P Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 107 5-00132-501 56P Capacitor, Ceramic Disc, 50V, 10%, SL
C 108 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 109 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 110 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 111 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 112 5-00052-512 .01U Cap, Stacked Metal Film 50V 5% -40/+85c
C 113 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 114 5-00016-501 470P Capacitor, Ceramic Disc, 50V, 10%, SL
C 301A 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 301B 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 301C 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 301D 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 301E 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 301F 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 301G 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 301H 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c

32

REF# SRS PART # VALUE DESCRIPTION
C 301T 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 302A 5-00064-513 .0047U Capacitor, Mylar/Poly, 50V, 5%, Rad
C 302B 5-00064-513 .0047U Capacitor, Mylar/Poly, 50V, 5%, Rad
C 302C 5-00064-513 .0047U Capacitor, Mylar/Poly, 50V, 5%, Rad
C 302D 5-00064-513 .0047U Capacitor, Mylar/Poly, 50V, 5%, Rad
C 302E 5-00064-513 .0047U Capacitor, Mylar/Poly, 50V, 5%, Rad
C 302F 5-00064-513 .0047U Capacitor, Mylar/Poly, 50V, 5%, Rad
C 302G 5-00064-513 .0047U Capacitor, Mylar/Poly, 50V, 5%, Rad
C 302H 5-00064-513 .0047U Capacitor, Mylar/Poly, 50V, 5%, Rad
C 302T 5-00064-513 .0047U Capacitor, Mylar/Poly, 50V, 5%, Rad
C 303A 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 303B 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 303C 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 303D 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 303E 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 303F 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 303G 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 303H 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 303T 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 304A 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 304B 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 304C 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 304D 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 304E 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 304F 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 304G 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 304H 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 304T 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 305A 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 305B 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 305C 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 305D 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 305T 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 306A 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 306B 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 306C 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 306D 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 306T 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 307A 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 307B 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 307C 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 307D 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 307T 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 308A 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 308B 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 308C 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 308D 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 308T 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 309A 5-00134-529 100P Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 309B 5-00134-529 100P Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 309C 5-00134-529 100P Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 309D 5-00134-529 100P Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 309T 5-00134-529 100P Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 310A 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 310B 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 310C 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 310D 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 310T 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 311A 5-00017-501 47P Capacitor, Ceramic Disc, 50V, 10%, SL
C 311B 5-00017-501 47P Capacitor, Ceramic Disc, 50V, 10%, SL
C 311C 5-00017-501 47P Capacitor, Ceramic Disc, 50V, 10%, SL
C 311D 5-00017-501 47P Capacitor, Ceramic Disc, 50V, 10%, SL
C 311J 5-00008-501 22P Capacitor, Ceramic Disc, 50V, 10%, SL
C 311K 5-00008-501 22P Capacitor, Ceramic Disc, 50V, 10%, SL
C 311T 5-00017-501 47P Capacitor, Ceramic Disc, 50V, 10%, SL
C 312A 5-00008-501 22P Capacitor, Ceramic Disc, 50V, 10%, SL
C 312B 5-00008-501 22P Capacitor, Ceramic Disc, 50V, 10%, SL
C 312C 5-00008-501 22P Capacitor, Ceramic Disc, 50V, 10%, SL
C 312D 5-00008-501 22P Capacitor, Ceramic Disc, 50V, 10%, SL
C 312J 5-00008-501 22P Capacitor, Ceramic Disc, 50V, 10%, SL
C 312K 5-00008-501 22P Capacitor, Ceramic Disc, 50V, 10%, SL
C 312T 5-00008-501 22P Capacitor, Ceramic Disc, 50V, 10%, SL
C 315A 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 315B 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 315C 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 315D 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 315T 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 316A 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 316B 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 316C 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 316D 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 316J 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 316K 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 316T 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 317A 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL

REF# SRS PART # VALUE DESCRIPTION
C 317B 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 317C 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 317D 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 317J 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 317K 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 317T 5-00002-501 100P Capacitor, Ceramic Disc, 50V, 10%, SL
C 318A 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 318B 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 318C 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 318D 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 318J 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 318K 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 318T 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 401 5-00008-501 22P Capacitor, Ceramic Disc, 50V, 10%, SL
C 402 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 403 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 504 5-00049-566 .001U Cap, Polyester Film 50V 5% -40/+85c Rad
C 505 5-00049-566 .001U Cap, Polyester Film 50V 5% -40/+85c Rad
C 506 5-00049-566 .001U Cap, Polyester Film 50V 5% -40/+85c Rad
C 507 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 508 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 509 5-00049-566 .001U Cap, Polyester Film 50V 5% -40/+85c Rad
C 510 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 511 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 512 5-00123-531 8-35P Capacitor, Variable, Under Adj., 5mm
C 514 5-00056-512 .1U Cap, Stacked Metal Film 50V 5% -40/+85c
C 901 5-00102-517 4.7U Capacitor, Tantalum, 35V, 20%, Rad
C 902 5-00102-517 4.7U Capacitor, Tantalum, 35V, 20%, Rad
C 903 5-00102-517 4.7U Capacitor, Tantalum, 35V, 20%, Rad
C 904 5-00102-517 4.7U Capacitor, Tantalum, 35V, 20%, Rad
C 905 5-00102-517 4.7U Capacitor, Tantalum, 35V, 20%, Rad
C 906 5-00102-517 4.7U Capacitor, Tantalum, 35V, 20%, Rad
C 907 5-00102-517 4.7U Capacitor, Tantalum, 35V, 20%, Rad
C 909 5-00192-542 22U MIN Cap, Mini Electrolytic, 50V, 20% Radial
C 910 5-00098-517 10U Capacitor, Tantalum, 35V, 20%, Rad
C 911 5-00192-542 22U MIN Cap, Mini Electrolytic, 50V, 20% Radial
C 912 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 919 5-00192-542 22U MIN Cap, Mini Electrolytic, 50V, 20% Radial
C 920 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 921 5-00192-542 22U MIN Cap, Mini Electrolytic, 50V, 20% Radial
C 922 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 923 5-00192-542 22U MIN Cap, Mini Electrolytic, 50V, 20% Radial
C 924 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 926 5-00038-509 10U Capacitor, Electrolytic, 50V, 20%, Rad
C 927 5-00038-509 10U Capacitor, Electrolytic, 50V, 20%, Rad
C 928 5-00038-509 10U Capacitor, Electrolytic, 50V, 20%, Rad
C 929 5-00038-509 10U Capacitor, Electrolytic, 50V, 20%, Rad
C 940 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 941 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 942 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 944 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 945 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 951 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 952 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 954 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 955 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 956 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 957 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 958 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 960 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 961 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 962 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 963 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 964 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 965 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 966 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 967 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 968 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 969 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 970 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 971 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 972 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 973 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 974 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 975 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 976 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 977 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 978 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 979 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 980 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 981 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 982 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 984 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
CN504 5-00141-503 .22U Capacitor, Ceramic Disc, 50V, 20%, Z5U
CR509 5-00003-501 10P Capacitor, Ceramic Disc, 50V, 10%, SL

33

REF# SRS PART # VALUE DESCRIPTION
D 102 3-00134-301 1N759A Diode
D 104 3-00004-301 1N4148 Diode
D 301A 3-00004-301 1N4148 Diode
D 301B 3-00004-301 1N4148 Diode
D 301C 3-00004-301 1N4148 Diode
D 301D 3-00004-301 1N4148 Diode
D 301T 3-00004-301 1N4148 Diode
D 501 3-00004-301 1N4148 Diode
D 502 3-00135-301 1N5445A Diode
J 7 1-00036-116 7 PIN, WHITE Header, Amp, MTA-156
J 16 1-00037-130 16 PIN DIL Connector, Male
J 40 1-00038-130 40 PIN DIL Connector, Male
L 301A 6-00006-602 33U Inductor, Radial
L 301B 6-00006-602 33U Inductor, Radial
L 301C 6-00006-602 33U Inductor, Radial
L 301D 6-00006-602 33U Inductor, Radial
L 301T 6-00006-602 33U Inductor, Radial
L 302J 6-00006-602 33U Inductor, Radial
L 302K 6-00006-602 33U Inductor, Radial
L 303J 6-00006-602 33U Inductor, Radial
L 303K 6-00006-602 33U Inductor, Radial
L 501 6-00012-602 .11UH Inductor, Radial
N 101 4-00255-421 100X3 Res. Network, SIP, 1/4W,2% (Isolated)
N 102 4-00283-421 47X4 Res. Network, SIP, 1/4W,2% (Isolated)
N 103 4-00284-421 1.0KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 105 4-00258-421 100KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 107 4-00262-425 100X7 Resistor Network SIP 1/4W 2% (Common)
N 108 4-00262-425 100X7 Resistor Network SIP 1/4W 2% (Common)
N 109 4-00252-425 100X5 Resistor Network SIP 1/4W 2% (Common)
N 201A 4-00262-425 100X7 Resistor Network SIP 1/4W 2% (Common)
N 201B 4-00262-425 100X7 Resistor Network SIP 1/4W 2% (Common)
N 201C 4-00262-425 100X7 Resistor Network SIP 1/4W 2% (Common)
N 201D 4-00262-425 100X7 Resistor Network SIP 1/4W 2% (Common)
N 202A 4-00318-425 820X5 Resistor Network SIP 1/4W 2% (Common)
N 202B 4-00318-425 820X5 Resistor Network SIP 1/4W 2% (Common)
N 202C 4-00318-425 820X5 Resistor Network SIP 1/4W 2% (Common)
N 202D 4-00318-425 820X5 Resistor Network SIP 1/4W 2% (Common)
N 203A 4-00298-425 470X5 Resistor Network SIP 1/4W 2% (Common)
N 203B 4-00298-425 470X5 Resistor Network SIP 1/4W 2% (Common)
N 203C 4-00298-425 470X5 Resistor Network SIP 1/4W 2% (Common)
N 203D 4-00298-425 470X5 Resistor Network SIP 1/4W 2% (Common)
N 204A 4-00319-420 470X7 Resistor Network, DIP, 1/4W,2%,8 Ind
N 204B 4-00319-420 470X7 Resistor Network, DIP, 1/4W,2%,8 Ind
N 204C 4-00319-420 470X7 Resistor Network, DIP, 1/4W,2%,8 Ind
N 204D 4-00319-420 470X7 Resistor Network, DIP, 1/4W,2%,8 Ind
N 206 4-00252-425 100X5 Resistor Network SIP 1/4W 2% (Common)
N 301A 4-00248-421 150X4 Res. Network, SIP, 1/4W,2% (Isolated)
N 301B 4-00248-421 150X4 Res. Network, SIP, 1/4W,2% (Isolated)
N 301C 4-00248-421 150X4 Res. Network, SIP, 1/4W,2% (Isolated)
N 301D 4-00248-421 150X4 Res. Network, SIP, 1/4W,2% (Isolated)
N 301J 4-00248-421 150X4 Res. Network, SIP, 1/4W,2% (Isolated)
N 301K 4-00248-421 150X4 Res. Network, SIP, 1/4W,2% (Isolated)
N 301T 4-00248-421 150X4 Res. Network, SIP, 1/4W,2% (Isolated)
N 302 4-00252-425 100X5 Resistor Network SIP 1/4W 2% (Common)
N 303 4-00252-425 100X5 Resistor Network SIP 1/4W 2% (Common)
N 304 4-00285-421 470X3 Res. Network, SIP, 1/4W,2% (Isolated)
N 305 4-00293-421 470X4 Res. Network, SIP, 1/4W,2% (Isolated)
N 306 4-00313-425 390X7 Resistor Network SIP 1/4W 2% (Common)
N 307 4-00266-421 4.7KX3 Res. Network, SIP, 1/4W,2% (Isolated)
N 308 4-00245-421 4.7KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 309 4-00267-421 100KX3 Res. Network, SIP, 1/4W,2% (Isolated)
N 310 4-00258-421 100KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 313A 4-00245-421 4.7KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 313B 4-00245-421 4.7KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 313C 4-00245-421 4.7KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 313D 4-00245-421 4.7KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 313E 4-00245-421 4.7KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 313F 4-00245-421 4.7KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 313G 4-00245-421 4.7KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 313H 4-00245-421 4.7KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 313T 4-00245-421 4.7KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 314A 4-00256-421 47KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 314B 4-00256-421 47KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 314C 4-00256-421 47KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 314D 4-00256-421 47KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 314E 4-00256-421 47KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 314F 4-00256-421 47KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 314G 4-00256-421 47KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 314H 4-00256-421 47KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 314T 4-00256-421 47KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 315A 4-00244-421 10KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 315B 4-00244-421 10KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 315C 4-00244-421 10KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 315D 4-00244-421 10KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 315E 4-00244-421 10KX4 Res. Network, SIP, 1/4W,2% (Isolated)

REF# SRS PART # VALUE DESCRIPTION
N 315F 4-00244-421 10KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 315G 4-00244-421 10KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 315H 4-00244-421 10KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 315T 4-00244-421 10KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 316A 4-00246-421 47X3 Res. Network, SIP, 1/4W,2% (Isolated)
N 316B 4-00246-421 47X3 Res. Network, SIP, 1/4W,2% (Isolated)
N 316C 4-00246-421 47X3 Res. Network, SIP, 1/4W,2% (Isolated)
N 316D 4-00246-421 47X3 Res. Network, SIP, 1/4W,2% (Isolated)
N 316T 4-00246-421 47X3 Res. Network, SIP, 1/4W,2% (Isolated)
N 317A 4-00246-421 47X3 Res. Network, SIP, 1/4W,2% (Isolated)
N 317B 4-00246-421 47X3 Res. Network, SIP, 1/4W,2% (Isolated)
N 317C 4-00246-421 47X3 Res. Network, SIP, 1/4W,2% (Isolated)
N 317D 4-00246-421 47X3 Res. Network, SIP, 1/4W,2% (Isolated)
N 317T 4-00246-421 47X3 Res. Network, SIP, 1/4W,2% (Isolated)
N 322 4-00252-425 100X5 Resistor Network SIP 1/4W 2% (Common)
N 323 4-00252-425 100X5 Resistor Network SIP 1/4W 2% (Common)
N 401 4-00244-421 10KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 402 4-00244-421 10KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 403 4-00249-421 22KX3 Res. Network, SIP, 1/4W,2% (Isolated)
N 404 4-00291-421 10KX3 Res. Network, SIP, 1/4W,2% (Isolated)
N 405 4-00291-421 10KX3 Res. Network, SIP, 1/4W,2% (Isolated)
N 406 4-00244-421 10KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 407 4-00291-421 10KX3 Res. Network, SIP, 1/4W,2% (Isolated)
N 408 4-00244-421 10KX4 Res. Network, SIP, 1/4W,2% (Isolated)
N 501 4-00247-425 100X9 Resistor Network SIP 1/4W 2% (Common)
N 502 4-00293-421 470X4 Res. Network, SIP, 1/4W,2% (Isolated)
N 503 4-00266-421 4.7KX3 Res. Network, SIP, 1/4W,2% (Isolated)
N 504 4-00284-421 1.0KX4 Res. Network, SIP, 1/4W,2% (Isolated)
PC1 7-00077-701 DG535-28 Printed Circuit Board
Q 101 3-00139-325 J108 Transistor, TO-92 Package
Q 102 3-00027-325 2N5770 Transistor, TO-92 Package
Q 103 3-00027-325 2N5770 Transistor, TO-92 Package
Q 104 3-00028-325 2N5771 Transistor, TO-92 Package
Q 105 3-00028-325 2N5771 Transistor, TO-92 Package
Q 106 3-00022-325 2N3906 Transistor, TO-92 Package
Q 107 3-00022-325 2N3906 Transistor, TO-92 Package
Q 108 3-00021-325 2N3904 Transistor, TO-92 Package
Q 109 3-00030-325 J310 Transistor, TO-92 Package
Q 110 3-00022-325 2N3906 Transistor, TO-92 Package
Q 111 3-00025-325 2N5088 Transistor, TO-92 Package
Q 112 3-00025-325 2N5088 Transistor, TO-92 Package
Q 113 3-00021-325 2N3904 Transistor, TO-92 Package
Q 114 3-00030-325 J310 Transistor, TO-92 Package
Q 115 3-00030-325 J310 Transistor, TO-92 Package
Q 116 3-00029-325 2N5951 Transistor, TO-92 Package
Q 301A 3-00022-325 2N3906 Transistor, TO-92 Package
Q 301B 3-00022-325 2N3906 Transistor, TO-92 Package
Q 301C 3-00022-325 2N3906 Transistor, TO-92 Package
Q 301D 3-00022-325 2N3906 Transistor, TO-92 Package
Q 301E 3-00022-325 2N3906 Transistor, TO-92 Package
Q 301F 3-00022-325 2N3906 Transistor, TO-92 Package
Q 301G 3-00022-325 2N3906 Transistor, TO-92 Package
Q 301H 3-00022-325 2N3906 Transistor, TO-92 Package
Q 301T 3-00022-325 2N3906 Transistor, TO-92 Package
Q 302A 3-00177-321 2N2222 Transistor, TO-18 Package
Q 302B 3-00177-321 2N2222 Transistor, TO-18 Package
Q 302C 3-00177-321 2N2222 Transistor, TO-18 Package
Q 302D 3-00177-321 2N2222 Transistor, TO-18 Package
Q 302E 3-00177-321 2N2222 Transistor, TO-18 Package
Q 302F 3-00177-321 2N2222 Transistor, TO-18 Package
Q 302G 3-00177-321 2N2222 Transistor, TO-18 Package
Q 302H 3-00177-321 2N2222 Transistor, TO-18 Package
Q 302T 3-00177-321 2N2222 Transistor, TO-18 Package
Q 303A 3-00136-320 2N2905 Transistor, TO-05 Package
Q 303B 3-00136-320 2N2905 Transistor, TO-05 Package
Q 303C 3-00136-320 2N2905 Transistor, TO-05 Package
Q 303D 3-00136-320 2N2905 Transistor, TO-05 Package
Q 303E 3-00136-320 2N2905 Transistor, TO-05 Package
Q 303F 3-00136-320 2N2905 Transistor, TO-05 Package
Q 303G 3-00136-320 2N2905 Transistor, TO-05 Package
Q 303H 3-00136-320 2N2905 Transistor, TO-05 Package
Q 303T 3-00136-320 2N2905 Transistor, TO-05 Package
Q 304A 3-00022-325 2N3906 Transistor, TO-92 Package
Q 304B 3-00022-325 2N3906 Transistor, TO-92 Package
Q 304C 3-00022-325 2N3906 Transistor, TO-92 Package
Q 304D 3-00022-325 2N3906 Transistor, TO-92 Package
Q 304T 3-00022-325 2N3906 Transistor, TO-92 Package
Q 305A 3-00022-325 2N3906 Transistor, TO-92 Package
Q 305B 3-00022-325 2N3906 Transistor, TO-92 Package
Q 305C 3-00022-325 2N3906 Transistor, TO-92 Package
Q 305D 3-00022-325 2N3906 Transistor, TO-92 Package
Q 305T 3-00022-325 2N3906 Transistor, TO-92 Package
Q 306A 3-00022-325 2N3906 Transistor, TO-92 Package
Q 306B 3-00022-325 2N3906 Transistor, TO-92 Package
Q 306C 3-00022-325 2N3906 Transistor, TO-92 Package

34

REF# SRS PART # VALUE DESCRIPTION
Q 306D 3-00022-325 2N3906 Transistor, TO-92 Package
Q 306T 3-00022-325 2N3906 Transistor, TO-92 Package
Q 307A 3-00027-325 2N5770 Transistor, TO-92 Package
Q 307B 3-00027-325 2N5770 Transistor, TO-92 Package
Q 307C 3-00027-325 2N5770 Transistor, TO-92 Package
Q 307D 3-00027-325 2N5770 Transistor, TO-92 Package
Q 307T 3-00027-325 2N5770 Transistor, TO-92 Package
Q 308A 3-00027-325 2N5770 Transistor, TO-92 Package
Q 308B 3-00027-325 2N5770 Transistor, TO-92 Package
Q 308C 3-00027-325 2N5770 Transistor, TO-92 Package
Q 308D 3-00027-325 2N5770 Transistor, TO-92 Package
Q 308T 3-00027-325 2N5770 Transistor, TO-92 Package
Q 309A 8-00071-860 SR534 ASSY SRS sub assemblies
Q 309B 8-00071-860 SR534 ASSY SRS sub assemblies
Q 309C 8-00071-860 SR534 ASSY SRS sub assemblies
Q 309D 8-00071-860 SR534 ASSY SRS sub assemblies
Q 309T 8-00071-860 SR534 ASSY SRS sub assemblies
Q 310A 8-00071-860 SR534 ASSY SRS sub assemblies
Q 310B 8-00071-860 SR534 ASSY SRS sub assemblies
Q 310C 8-00071-860 SR534 ASSY SRS sub assemblies
Q 310D 8-00071-860 SR534 ASSY SRS sub assemblies
Q 310T 8-00071-860 SR534 ASSY SRS sub assemblies
Q 311A 3-00139-325 J108 Transistor, TO-92 Package
Q 311B 3-00139-325 J108 Transistor, TO-92 Package
Q 311C 3-00139-325 J108 Transistor, TO-92 Package
Q 311D 3-00139-325 J108 Transistor, TO-92 Package
Q 311T 3-00139-325 J108 Transistor, TO-92 Package
Q 312J 3-00139-325 J108 Transistor, TO-92 Package
Q 312K 3-00139-325 J108 Transistor, TO-92 Package
Q 313J 3-00139-325 J108 Transistor, TO-92 Package
Q 313K 3-00139-325 J108 Transistor, TO-92 Package
Q 314J 8-00071-860 SR534 ASSY SRS sub assemblies
Q 314K 8-00071-860 SR534 ASSY SRS sub assemblies
Q 315J 8-00071-860 SR534 ASSY SRS sub assemblies
Q 315K 8-00071-860 SR534 ASSY SRS sub assemblies
Q 316A 3-00021-325 2N3904 Transistor, TO-92 Package
Q 316B 3-00021-325 2N3904 Transistor, TO-92 Package
Q 316C 3-00021-325 2N3904 Transistor, TO-92 Package
Q 316D 3-00021-325 2N3904 Transistor, TO-92 Package
Q 316J 3-00021-325 2N3904 Transistor, TO-92 Package
Q 316K 3-00021-325 2N3904 Transistor, TO-92 Package
Q 316T 3-00021-325 2N3904 Transistor, TO-92 Package
Q 502 3-00022-325 2N3906 Transistor, TO-92 Package
Q 503 3-00022-325 2N3906 Transistor, TO-92 Package
Q 504 3-00021-325 2N3904 Transistor, TO-92 Package
Q 505 3-00021-325 2N3904 Transistor, TO-92 Package
R 101 4-00233-424 47 Resistor, Carbon Comp, 2W, 5%
R 102 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 103 4-00022-401 1.0M Resistor, Carbon Film, 1/4W, 5%
R 104 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 105 4-00072-401 330 Resistor, Carbon Film, 1/4W, 5%
R 106 4-00027-401 1.5K Resistor, Carbon Film, 1/4W, 5%
R 107 4-00072-401 330 Resistor, Carbon Film, 1/4W, 5%
R 108 4-00154-407 150 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 109 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 112 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 113 4-00185-407 4.02K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 114 4-00043-401 180 Resistor, Carbon Film, 1/4W, 5%
R 115 4-00043-401 180 Resistor, Carbon Film, 1/4W, 5%
R 116 4-00103-401 820 Resistor, Carbon Film, 1/4W, 5%
R 117 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 118 4-00193-407 499 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 119 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 120 4-00072-401 330 Resistor, Carbon Film, 1/4W, 5%
R 122 4-00065-401 3.3K Resistor, Carbon Film, 1/4W, 5%
R 123 4-00034-401 10K Resistor, Carbon Film, 1/4W, 5%
R 124 4-00034-401 10K Resistor, Carbon Film, 1/4W, 5%
R 125 4-00062-401 270 Resistor, Carbon Film, 1/4W, 5%
R 126 4-00035-401 10M Resistor, Carbon Film, 1/4W, 5%
R 128 4-00072-401 330 Resistor, Carbon Film, 1/4W, 5%
R 129 4-00072-401 330 Resistor, Carbon Film, 1/4W, 5%
R 130 4-00138-407 10.0K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 131 4-00278-407 10.7K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 132 4-00094-401 6.8K Resistor, Carbon Film, 1/4W, 5%
R 133 4-00277-407 3.40K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 134 4-00309-407 3.32K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 135 4-00090-401 560 Resistor, Carbon Film, 1/4W, 5%
R 136 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 137 4-00208-407 825 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 138 4-00072-401 330 Resistor, Carbon Film, 1/4W, 5%
R 139 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 140 4-00034-401 10K Resistor, Carbon Film, 1/4W, 5%
R 141 4-00083-401 47K Resistor, Carbon Film, 1/4W, 5%
R 142 4-00048-401 2.2K Resistor, Carbon Film, 1/4W, 5%
R 143 4-00042-401 15K Resistor, Carbon Film, 1/4W, 5%

REF# SRS PART # VALUE DESCRIPTION
R 144 4-00059-401 22K Resistor, Carbon Film, 1/4W, 5%
R 145 4-00030-401 10 Resistor, Carbon Film, 1/4W, 5%
R 147 4-00138-407 10.0K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 148 4-00138-407 10.0K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 149 4-00138-407 10.0K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 150 4-00310-407 6.19K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 151 4-00043-401 180 Resistor, Carbon Film, 1/4W, 5%
R 152 4-00316-401 91 Resistor, Carbon Film, 1/4W, 5%
R 153 4-00034-401 10K Resistor, Carbon Film, 1/4W, 5%
R 154 4-00057-401 220 Resistor, Carbon Film, 1/4W, 5%
R 155 4-00314-401 12 Resistor, Carbon Film, 1/4W, 5%
R 156 4-00072-401 330 Resistor, Carbon Film, 1/4W, 5%
R 301A 4-00080-401 47 Resistor, Carbon Fi lm, 1/4W, 5%
R 301B 4-00080-401 47 Resistor, Carbon Fi lm, 1/4W, 5%
R 301C 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 301D 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 301E 4-00080-401 47 Resistor, Carbon Fi lm, 1/4W, 5%
R 301F 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 301G 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 301H 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 301T 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 302A 4-00080-401 47 Resistor, Carbon Fi lm, 1/4W, 5%
R 302B 4-00080-401 47 Resistor, Carbon Fi lm, 1/4W, 5%
R 302C 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 302D 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 302E 4-00080-401 47 Resistor, Carbon Fi lm, 1/4W, 5%
R 302F 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 302G 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 302H 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 302T 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 303A 4-00031-401 100 Resistor, Carbon Film, 1/4W, 5%
R 303B 4-00031-401 100 Resistor, Carbon Film, 1/4W, 5%
R 303C 4-00031-401 100 Resistor, Carbon Film, 1/4W, 5%
R 303D 4-00031-401 100 Resistor, Carbon Film, 1/4W, 5%
R 303E 4-00031-401 100 Resistor, Carbon Film, 1/4W, 5%
R 303F 4-00031-401 100 Resistor, Carbon Film, 1/4W, 5%
R 303G 4-00031-401 100 Resistor, Carbon Film, 1/4W, 5%
R 303H 4-00031-401 100 Resistor, Carbon Film, 1/4W, 5%
R 303T 4-00031-401 100 Resistor, Carbon Film, 1/4W, 5%
R 304A 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 304B 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 304C 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 304D 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 304E 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 304F 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 304G 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 304H 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 304T 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 305A 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 305B 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 305C 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 305D 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 305E 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 305F 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 305G 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 305H 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 305T 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 306A 4-00292-401 1.1K Resistor, Carbon Film, 1/4W, 5%
R 306B 4-00292-401 1.1K Resistor, Carbon Film, 1/4W, 5%
R 306C 4-00292-401 1.1K Resistor, Carbon Film, 1/4W, 5%
R 306D 4-00292-401 1.1K Resistor, Carbon Film, 1/4W, 5%
R 306E 4-00292-401 1.1K Resistor, Carbon Film, 1/4W, 5%
R 306F 4-00292-401 1.1K Resistor, Carbon Fil m, 1/4W, 5%
R 306G 4-00292-401 1.1K Resistor, Carbon Film, 1/4W, 5%
R 306H 4-00292-401 1.1K Resistor, Carbon Film, 1/4W, 5%
R 306T 4-00292-401 1.1K Resistor, Carbon Fil m, 1/4W, 5%
R 307A 4-00094-401 6.8K Resistor, Carbon Film, 1/4W, 5%
R 307B 4-00094-401 6.8K Resistor, Carbon Film, 1/4W, 5%
R 307C 4-00094-401 6.8K Resistor, Carbon Film, 1/4W, 5%
R 307D 4-00094-401 6.8K Resistor, Carbon Film, 1/4W, 5%
R 307T 4-00094-401 6.8K Resistor, Carbon Fil m, 1/4W, 5%
R 308A 4-00080-401 47 Resistor, Carbon Fi lm, 1/4W, 5%
R 308B 4-00080-401 47 Resistor, Carbon Fi lm, 1/4W, 5%
R 308C 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 308D 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 308J 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 308K 4-00080-401 47 Resistor, Carbon Fi lm, 1/4W, 5%
R 308T 4-00080-401 47 Resistor, Carbon Film, 1/4W, 5%
R 309A 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 309B 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 309C 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 309D 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 309J 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 309K 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 309T 4-00234-407 10 Resistor, Metal Film, 1/8W, 1%, 50PPM

35

REF# SRS PART # VALUE DESCRIPTION
R 310A 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 310B 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 310C 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 310D 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 310T 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 311A 4-00215-407 909 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 311B 4-00215-407 909 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 311C 4-00215-407 909 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 311D 4-00215-407 909 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 311T 4-00215-407 909 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 312A 4-00034-401 10K Resistor, Carbon Film, 1/4W, 5%
R 312B 4-00034-401 10K Resistor, Carbon Film, 1/4W, 5%
R 312C 4-00034-401 10K Resistor, Carbon Film, 1/4W, 5%
R 312D 4-00034-401 10K Resistor, Carbon Film, 1/4W, 5%
R 312T 4-00034-401 10K Resistor, Carbon Film, 1/4W, 5%
R 313A 4-00057-401 220 Resistor, Carbon Film, 1/4W, 5%
R 313B 4-00057-401 220 Resistor, Carbon Film, 1/4W, 5%
R 313C 4-00057-401 220 Resistor, Carbon Film, 1/4W, 5%
R 313D 4-00057-401 220 Resistor, Carbon Film, 1/4W, 5%
R 313T 4-00057-401 220 Resistor, Carbon Film, 1/4W, 5%
R 314A 4-00185-407 4.02K Resistor, Metal Fil m, 1/8W, 1%, 50PPM
R 314B 4-00185-407 4.02K Resistor, Metal Fil m, 1/8W, 1%, 50PPM
R 314C 4-00185-407 4.02K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 314D 4-00185-407 4.02K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 314T 4-00185-407 4.02K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 315A 4-00130-407 1.00K Resistor, Metal Fil m, 1/8W, 1%, 50PPM
R 315B 4-00130-407 1.00K Resistor, Metal Fil m, 1/8W, 1%, 50PPM
R 315C 4-00130-407 1.00K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 315D 4-00130-407 1.00K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 315T 4-00130-407 1.00K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 316A 4-00048-401 2.2K Resistor, Carbon Film, 1/4W, 5%
R 316B 4-00048-401 2.2K Resistor, Carbon Film, 1/4W, 5%
R 316C 4-00048-401 2.2K Resistor, Carbon Film, 1/4W, 5%
R 316D 4-00048-401 2.2K Resistor, Carbon Film, 1/4W, 5%
R 316T 4-00048-401 2.2K Resistor, Carbon Fil m, 1/4W, 5%
R 317A 4-00072-401 330 Resistor, Carbon Film, 1/4W, 5%
R 317B 4-00072-401 330 Resistor, Carbon Film, 1/4W, 5%
R 317C 4-00072-401 330 Resistor, Carbon Film, 1/4W, 5%
R 317D 4-00072-401 330 Resistor, Carbon Film, 1/4W, 5%
R 317T 4-00072-401 330 Resistor, Carbon Film, 1/4W, 5%
R 318A 4-00103-401 820 Resistor, Carbon Film, 1/4W, 5%
R 318B 4-00103-401 820 Resistor, Carbon Film, 1/4W, 5%
R 318C 4-00103-401 820 Resistor, Carbon Film, 1/4W, 5%
R 318D 4-00103-401 820 Resistor, Carbon Film, 1/4W, 5%
R 318T 4-00103-401 820 Resistor, Carbon Film, 1/4W, 5%
R 319A 4-00071-401 33 Resistor, Carbon Fi lm, 1/4W, 5%
R 319B 4-00071-401 33 Resistor, Carbon Fi lm, 1/4W, 5%
R 319C 4-00071-401 33 Resistor, Carbon Film, 1/4W, 5%
R 319D 4-00071-401 33 Resistor, Carbon Film, 1/4W, 5%
R 319T 4-00071-401 33 Resistor, Carbon Film, 1/4W, 5%
R 320A 4-00071-401 33 Resistor, Carbon Fi lm, 1/4W, 5%
R 320B 4-00071-401 33 Resistor, Carbon Fi lm, 1/4W, 5%
R 320C 4-00071-401 33 Resistor, Carbon Film, 1/4W, 5%
R 320D 4-00071-401 33 Resistor, Carbon Film, 1/4W, 5%
R 320T 4-00071-401 33 Resistor, Carbon Film, 1/4W, 5%
R 321A 4-00056-401 22 Resistor, Carbon Fi lm, 1/4W, 5%
R 321B 4-00056-401 22 Resistor, Carbon Fi lm, 1/4W, 5%
R 321C 4-00056-401 22 Resistor, Carbon Film, 1/4W, 5%
R 321D 4-00056-401 22 Resistor, Carbon Film, 1/4W, 5%
R 321T 4-00056-401 22 Resistor, Carbon Film, 1/4W, 5%
R 322A 4-00236-407 45.3 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 322B 4-00236-407 45.3 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 322C 4-00236-407 45.3 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 322D 4-00236-407 45.3 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 322T 4-00236-407 45.3 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 323A 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 323B 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 323C 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 323D 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 323T 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 324J 4-00236-407 45.3 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 324K 4-00236-407 45.3 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 325J 4-00236-407 45.3 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 325K 4-00236-407 45.3 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 326J 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 326K 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 327J 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 327K 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 328J 4-00071-401 33 Resistor, Carbon Film, 1/4W, 5%
R 328K 4-00071-401 33 Resistor, Carbon Fi lm, 1/4W, 5%
R 329J 4-00071-401 33 Resistor, Carbon Film, 1/4W, 5%
R 329K 4-00071-401 33 Resistor, Carbon Fi lm, 1/4W, 5%
R 330 4-00031-401 100 Resistor, Carbon Film, 1/4W, 5%
R 331A 4-00090-401 560 Resistor, Carbon Film, 1/4W, 5%
R 331B 4-00090-401 560 Resistor, Carbon Film, 1/4W, 5%

REF# SRS PART # VALUE DESCRIPTION
R 331C 4-00090-401 560 Resistor, Carbon Film, 1/4W, 5%
R 331D 4-00090-401 560 Resistor, Carbon Film, 1/4W, 5%
R 331T 4-00090-401 560 Resistor, Carbon Film, 1/4W, 5%
R 332A 4-00048-401 2.2K Resistor, Carbon Film, 1/4W, 5%
R 332B 4-00048-401 2.2K Resistor, Carbon Film, 1/4W, 5%
R 332C 4-00048-401 2.2K Resistor, Carbon Film, 1/4W, 5%
R 332D 4-00048-401 2.2K Resistor, Carbon Film, 1/4W, 5%
R 332E 4-00048-401 2.2K Resistor, Carbon Film, 1/4W, 5%
R 332F 4-00048-401 2.2K Resistor, Carbon Fil m, 1/4W, 5%
R 332G 4-00048-401 2.2K Resistor, Carbon Film, 1/4W, 5%
R 332H 4-00048-401 2.2K Resistor, Carbon Film, 1/4W, 5%
R 332T 4-00048-401 2.2K Resistor, Carbon Fil m, 1/4W, 5%
R 333A 4-00311-405 100 Resistor, Carbon Film, 1/8W, 5%
R 333B 4-00311-405 100 Resistor, Carbon Film, 1/8W, 5%
R 333C 4-00311-405 100 Resistor, Carbon Film, 1/8W, 5%
R 333D 4-00311-405 100 Resistor, Carbon Film, 1/8W, 5%
R 333T 4-00311-405 100 Resistor, Carbon Film, 1/8W, 5%
R 402 4-00034-401 10K Resistor, Carbon Film, 1/4W, 5%
R 403 4-00192-407 49.9K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 404 4-00281-407 11.8K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 405 4-00068-401 300 Resistor, Carbon Film, 1/4W, 5%
R 406 4-00834-407 7.15K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 407 4-00034-401 10K Resistor, Carbon Film, 1/4W, 5%
R 501 4-00038-401 120 Resistor, Carbon Film, 1/4W, 5%
R 502 4-00034-401 10K Resistor, Carbon Film, 1/4W, 5%
R 503 4-00103-401 820 Resistor, Carbon Film, 1/4W, 5%
R 504 4-00057-401 220 Resistor, Carbon Film, 1/4W, 5%
R 505 4-00031-401 100 Resistor, Carbon Film, 1/4W, 5%
R 506 4-00032-401 100K Resistor, Carbon Film, 1/4W, 5%
R 508 4-00051-401 2.7K Resistor, Carbon Film, 1/4W, 5%
R 509 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 510 4-00057-401 220 Resistor, Carbon Film, 1/4W, 5%
R 511 4-00083-401 47K Resistor, Carbon Film, 1/4W, 5%
R 901 4-00149-407 121 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 902 4-00238-407 464 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 903 4-00169-407 249 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 904 4-00241-407 787 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 917 4-00235-407 383 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 918 4-00149-407 121 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 919 4-00149-407 121 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 920 4-00317-407 422 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 921 4-00149-407 121 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 922 4-00242-407 73.2 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 923 4-00300-409 10 Resistor, Wire Wound
R 924 4-00320-409 18 Resistor, Wire Wound
SW501 2-00022-217 DPDT Switch, On-None-On, Toggle, Right Angle
U 102 3-00180-340 MC10H107 Integrated Circuit (Thru-hole Pkg)
U 103 3-00194-340 MC10H131 Integrated Circuit (Thru-hole Pkg)
U 105 3-00142-340 MC10131 Integrated Circuit (Thru-hole Pkg)
U 106 3-00179-340 MC10H101 Integrated Circuit (Thru-hole Pkg)
U 107 3-00151-340 MC10125 Integrated Circuit (Thru-hole Pkg)
U 108 3-00200-340 MC10124 Integrated Circuit (Thru-hole Pkg)
U 109 3-00201-340 MC10H105 Integrated Circuit (Thru-hole Pkg)
U 111 3-00093-340 LM13600 Integrated Circuit (Thru-hole Pkg)
U 112 3-00088-340 LF353 Integrated Circuit (Thru-hole Pkg)
U 201A 3-00142-340 MC10131 Integrated Circuit (Thru-hole Pkg)
U 201B 3-00142-340 MC10131 Integrated Circuit (Thru-hole Pkg)
U 201C 3-00142-340 MC10131 Integrated Circuit (Thru-hole Pkg)
U 201D 3-00142-340 MC10131 Integrated Circuit (Thru-hole Pkg)
U 202A 3-00142-340 MC10131 Integrated Circuit (Thru-hole Pkg)
U 202B 3-00142-340 MC10131 Integrated Circuit (Thru-hole Pkg)
U 202C 3-00142-340 MC10131 Integrated Circuit (Thru-hole Pkg)
U 202D 3-00142-340 MC10131 Integrated Circuit (Thru-hole Pkg)
U 203 3-00151-340 MC10125 Integrated Circuit (Thru-hole Pkg)
U 303 3-00179-340 MC10H101 Integrated Circuit (Thru-hole Pkg)
U 304 3-00179-340 MC10H101 Integrated Circuit (Thru-hole Pkg)
U 305 3-00180-340 MC10H107 Integrated Circuit (Thru-hole Pkg)
U 306 3-00180-340 MC10H107 Integrated Circuit (Thru-hole Pkg)
U 307 3-00093-340 LM13600 Integrated Circuit (Thru-hole Pkg)
U 308 3-00093-340 LM13600 Integrated Circuit (Thru-hole Pkg)
U 309 3-00093-340 LM13600 Integrated Circuit (Thru-hole Pkg)
U 310 3-00087-340 LF347 Integrated Circuit (Thru-hole Pkg)
U 311 3-00087-340 LF347 Integrated Circuit (Thru-hole Pkg)
U 312 3-00087-340 LF347 Integrated Circuit (Thru-hole Pkg)
U 313 3-00087-340 LF347 Integrated Circuit (Thru-hole Pkg)
U 314 3-00087-340 LF347 Integrated Circuit (Thru-hole Pkg)
U 315 3-00087-340 LF347 Integrated Circuit (Thru-hole Pkg)
U 316 3-00087-340 LF347 Integrated Circuit (Thru-hole Pkg)
U 317 3-00087-340 LF347 Integrated Circuit (Thru-hole Pkg)
U 318 3-00087-340 LF347 Integrated Circuit (Thru-hole Pkg)
U 319 3-00087-340 LF347 Integrated Circuit (Thru-hole Pkg)
U 401 3-00059-340 AD7542JN Integrated Circuit (Thru-hole Pkg)
U 402 3-00087-340 LF347 Integrated Circuit (Thru-hole Pkg)
U 403 3-00152-340 CD4051 Integrated Circuit (Thru-hole Pkg)
U 404 3-00152-340 CD4051 Integrated Circuit (Thru-hole Pkg)

36

REF# SRS PART # VALUE DESCRIPTION
U 405 3-00152-340 CD4051 Integrated Circuit (Thru-hole Pkg)
U 406 3-00152-340 CD4051 Integrated Circuit (Thru-hole Pkg)
U 501 6-00183-623 10MHZ 1PPM Temp. Controlled Crystal Osc.
U 502 8-00073-860 SR531 ASSY SRS sub ass emblies
U 503 3-00105-340 LM741 Integrated Circuit (Thru-hole Pkg)
U 504 3-00147-340 MC1648 Integrated Circuit (Thru-hole Pkg)
U 505 3-00142-340 MC10131 Integrated Circuit (Thru-hole Pkg)
U 506 3-00142-340 MC10131 Integrated Circuit (Thru-hole Pkg)
U 507 3-00143-340 LM393 Integrated Circuit (Thru-hole Pkg)
U 508 3-00190-340 10MHZ 25PPM Integrated Circuit (Thru-hole Pkg)
U 510 3-00088-340 LF353 Integrated Circuit (Thru-hole Pkg)
U 806 3-00046-340 74HC374 Integrated Circuit (Thru-hole Pkg)
U 807 3-00046-340 74HC374 Integrated Circuit (Thru-hole Pkg)
U 813 3-00046-340 74HC374 Integrated Circuit (Thru-hole Pkg)
U 901 3-00188-340 LH0070-0H Integrated Circuit (Thru-hole Pkg)
U 902 3-00234-329 LT1085 Voltage Reg., TO-220 (TAB) Package
U 903 3-00149-329 LM317T Voltage Reg., TO-220 (TAB) Package
U 907 3-00141-329 LM337T Voltage Reg., TO-220 (TAB) Package
U 908 3-00141-329 LM337T Voltage Reg., TO-220 (TAB) Package
U 909 3-00141-329 LM337T Voltage Reg., TO-220 (TAB) Package
Z 0 0-00089-033 4" Tie
Z 0 0-00110-053 1-1/2" #24 Wire #24 UL1007 Strip 1/4x1/4 Tin
Z 0 0-00127-050 4" #18 Wire #18 UL1007 Stripped 3/8x3/8 No Tin
Z 0 0-00162-007 TO-200 UP Heat Sinks
Z 0 0-00163-007 TO-5 Heat Sinks
Z 0 0-00165-003 TO-18 Insulators
Z 0 0-00207-003 TO-5 Insulators
Z 0 0-00261-003 TO-18 Insulators
Z 0 0-00513-003 TO5 Insulators
Z 0 0-00514-030 TUBULAR NYLON Spacer
Z 0 1-00034-113 7 PIN, 18AWG/OR Connector, Amp, MTA-156
Z 0 6-00017-630 FB43-301 Ferrite Beads
Z 0 9-00193-917 DG535 SERIAL Product Labels

Front PC Board Parts List

REF# SRS PART # VALUE DESCRIPTION
C 1 5-00266-559 .01U Cap., Coated Ceramic Disc, AC Rated
D 709 3-00004-301 1N4148 Diode
D 710 3-00004-301 1N4148 Diode
D 711 3-00004-301 1N4148 Diode
DS101 3-00012-306 GREEN LED, Rectangular
DS102 3-00175-306 YELLOW LED, Rectangular
DS103 3-00013-306 RED LED, Rectangular
DS104 3-00012-306 GREEN LED, Rectangular
DS105 3-00012-306 GREEN LED, Rectangular
DS106 3-00012-306 GREEN LED, Rectangular
DS107 3-00175-306 YELLOW LED, Rectangular
DS108 3-00012-306 GREEN LED, Rectangular
J 20 1-00035-130 20 PIN DIL Connector, Male
L 1 6-00023-601 150UH Inductor
PC1 7-00076-701 DG535-32 Printed Circuit Board
RK1 7-00141-740 DG535-27 Keypad, Conductive Rubber
RN701 4-00276-425 10KX9 Resistor Network SIP 1/4W 2% (Common)
RN702 4-00226-425 150X9 Resistor Network SIP 1/4W 2% (Common)
T 1 6-00018-610 DG535 Transformer
Z 0 0-00014-002 6J4 Power_Entry Hardware
Z 0 0-00025-005 3/8" Lugs
Z 0 0-00048-011 6-32 KEP Nut, Kep
Z 0 0-00096-041 #4 SPLIT Washer, Split
Z 0 0-00104-043 #4 NYLON Washer, nylon
Z 0 0-00126-053 3-1/2" #24 Wire #24 UL1007 Strip 1/4x1/4 Tin
Z 0 0-00140-009 SHEET Mylar Sheet
Z 0 0-00152-000 SR540FOOT Hardware, Misc.
Z 0 0-00153-057 GROMMET2 Grommet
Z 0 0-00157-000 BNC PLUG Hardware, Misc.
Z 0 0-00158-000 60MM 24V Hardware, Misc.
Z 0 0-00159-000 FAN GUARD Hardware, Misc.
Z 0 0-00160-011 10-32 KEP Nut, Kep
Z 0 0-00167-023 6-32X1/2RP Screw, Roundhead Phillips
Z 0 0-00170-021 10-32X1-5/8 Screw, Panhead Phillips
Z 0 0-00171-021 6-32X5/16 Screw, Panhead Phillips
Z 0 0-00172-027 #4X1/4PPA Screw, Sheet Metal
Z 0 0-00173-044 CLEAR 2 Window
Z 0 0-00183-043 #10 SHOULDER Washer, nylon
Z 0 0-00187-021 4-40X1/4PP Screw, Panhead Phillips
Z 0 0-00196-052 1-1/2"X#22 Wire #22 UL1007
Z 0 0-00209-021 4-40X3/8PP Screw, Panhead Phillips
Z 0 0-00368-053 21" #24 Wire #24 UL1007 Strip 1/4x1/4 Tin
Z 0 0-00414-033 #4 CLAMP Tie
Z 0 0-00443-000 SWITCH Hardware, Misc.
Z 0 0-00523-048 5-5/8" #18 Wire, #18 UL1015 Strip 3/8 x 3/8 No Tin
Z 0 1-00003-120 BNC Connector, BNC
Z 0 1-00032-130 14 PIN DIL Connector, Male

REF# SRS PART # VALUE DESCRIPTION
Z 0 1 -00033-113 5 PIN, 18AWG/OR Connector, Amp, MTA-156
Z 0 1-00053-172 USA Line Cord
Z 0 2-00023-218 DPDT Switch, Panel Mount, Power, Rocker
Z 0 4-00214-407 90.9K Resistor, Metal Film, 1/8W, 1%, 50PPM
Z 0 6-00043-611 1.5A 3AG Fuse
Z 0 7-00067-711 DG535-18 Rear Panel
Z 0 7-00069-720 DG535-22 Fabricated Part
Z 0 7-00070-720 DG535-23 Fabricated Part
Z 0 7-00113-720 DG535-37 Fabricated Part
Z 0 7-00124-720 TRANSCOVER2-

Z 0 7-00441-720 DG535-15 Fabricated Part
Z 0 7-00442-709 DG535 Lexan Overlay
Z 0 8-00043-820 1X20 LCD Display
Z 0 9-00797-924 1/2" WIDE ADHES Tape, All types

MOD

Fabricated Part

Optional Outputs PC Board Parts List

REF# SRS PART # VALUE DESCRIPTION
C 2A 5-00060-512 1.0U Cap, Stacked Metal Film 50V 5% -40/+85c
C 2B 5-00060-512 1.0U Cap, Stacked Metal Film 50V 5% -40/+85c
C 2C 5-00060-512 1.0U Cap, Stacked Metal Film 50V 5% -40/+85c
C 2D 5-00060-512 1.0U Cap, Stacked Metal Film 50V 5% -40/+85c
C 2T 5-00060-512 1.0U Cap, Stacked Metal Film 50V 5% -40/+85c
C 3A 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 3B 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 3C 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 3D 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 3T 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 4A 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 4B 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 4C 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 4D 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 4T 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 5A 5-00060-512 1.0U Cap, Stacked Metal Film 50V 5% -40/+85c
C 5B 5-00060-512 1.0U Cap, Stacked Metal Film 50V 5% -40/+85c
C 5C 5-00060-512 1.0U Cap, Stacked Metal Film 50V 5% -40/+85c
C 5D 5-00060-512 1.0U Cap, Stacked Metal Film 50V 5% -40/+85c
C 5T 5-00060-512 1.0U Cap, Stacked Metal Film 50V 5% -40/+85c
C 7A 5-00008-501 22P Capacitor, Ceramic Disc, 50V, 10%, SL
C 7B 5-00008-501 22P Capacitor, Ceramic Disc, 50V, 10%, SL
C 7C 5-00008-501 22P Capacitor, Ceramic Disc, 50V, 10%, SL
C 7D 5-00008-501 22P Capacitor, Ceramic Disc, 50V, 10%, SL
C 7T 5-00008-501 22P Capacitor, Ceramic Disc, 50V, 10%, SL
C 8A 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 8B 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 8C 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 8D 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 8T 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 9 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 10 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 11 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 12 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 13 6-00000-600 DELETED Misc. Components
C 14A 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 14B 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 14C 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 14D 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 14T 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 15 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 16 5-00100-517 2.2U Capacitor, Tantalum, 35V, 20%, Rad
C 17A 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 17B 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 17C 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 17D 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
C 17T 5-00023-529 .1U Cap, Monolythic Ceramic, 50V, 20%, Z5U
D 1 3-00001-301 1N4001 Diode
P 1A 4-00008-440 500 Trim Pot, Single Turn, In-Line Leads
P 1B 4-00008-440 500 Trim Pot, Single Turn, In-Line Leads
P 1C 4-00008-440 500 Trim Pot, Single Turn, In-Line Leads
P 1D 4-00008-440 500 Trim Pot, Single Turn, In-Line Leads
P 1T 4-00008-440 500 Trim Pot, Single Turn, In-Line Leads
PC1 7-00115-701 DG532 Printed Circuit Board
Q 1A 3-00015-322 2N5583 Transistor, TO-39 Package
Q 1B 3-00015-322 2N5583 Transistor, TO-39 Package
Q 1C 3-00015-322 2N5583 Transistor, TO-39 Package
Q 1D 3-00015-322 2N5583 Transistor, TO-39 Package
Q 1T 3-00015-322 2N5583 Transistor, TO-39 Package
Q 2A 3-00015-322 2N5583 Transistor, TO-39 Package
Q 2B 3-00015-322 2N5583 Transistor, TO-39 Package
Q 2C 3-00015-322 2N5583 Transistor, TO-39 Package
Q 2D 3-00015-322 2N5583 Transistor, TO-39 Package
Q 2T 3-00015-322 2N5583 Transistor, TO-39 Package
Q 3A 8-00071-860 SR534 ASSY SRS sub assemblies
Q 3B 8-00071-860 SR534 ASSY SRS sub as semblies

37

REF# SRS PART # VALUE DESCRIPTION
Q 3C 8-00071-860 SR534 ASSY SRS sub assemblies
Q 3D 8-00071-860 SR534 ASSY SRS sub assemblies
Q 3T 8-00071-860 SR534 ASSY SRS sub assemblies
Q 4A 3-00022-325 2N3906 Transistor, TO-92 Package
Q 4B 3-00022-325 2N3906 Transistor, TO-92 Package
Q 4C 3-00022-325 2N3906 Transistor, TO-92 Package
Q 4D 3-00022-325 2N3906 Transistor, TO-92 Package
Q 4T 3-00022-325 2N3906 Transistor, TO-92 Package
R 1A 4-00204-407 750 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 1B 4-00204-407 750 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 1C 4-00204-407 750 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 1D 4-00204-407 750 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 1T 4-00204-407 750 Resistor, Metal Film, 1/8W, 1%, 50PPM
R 2A 4-00192-407 49.9K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 2B 4-00192-407 49.9K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 2C 4-00192-407 49.9K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 2D 4-00192-407 49.9K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 2T 4-00192-407 49.9K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 3A 4-00130-407 1.00K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 3B 4-00130-407 1.00K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 3C 4-00130-407 1.00K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 3D 4-00130-407 1.00K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 3T 4-00130-407 1.00K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 4A 4-00192-407 49.9K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 4B 4-00192-407 49.9K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 4C 4-00192-407 49.9K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 4D 4-00192-407 49.9K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 4T 4-00192-407 49.9K Resistor, Metal Film, 1/8W, 1%, 50PPM
R 5A 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 5B 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 5C 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 5D 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 5T 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 6A 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 6B 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 6C 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 6D 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 6T 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 7A 4-00071-401 33 Resistor, Carbon Film, 1/4W, 5%
R 7B 4-00071-401 33 Resistor, Carbon Film, 1/4W, 5%
R 7C 4-00071-401 33 Resistor, Carbon Film, 1/4W, 5%
R 7D 4-00071-401 33 Resistor, Carbon Film, 1/4W, 5%
R 7T 4-00071-401 33 Resistor, Carbon Film, 1/4W, 5%
R 8A 4-00030-401 10 Resistor, Carbon Film, 1/4W, 5%
R 8B 4-00030-401 10 Resistor, Carbon Film, 1/4W, 5%
R 8C 4-00030-401 10 Resistor, Carbon Film, 1/4W, 5%
R 8D 4-00030-401 10 Resistor, Carbon Film, 1/4W, 5%
R 8T 4-00030-401 10 Resistor, Carbon Film, 1/4W, 5%
R 9A 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 9B 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 9C 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 9D 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
R 9T 4-00021-401 1.0K Resistor, Carbon Film, 1/4W, 5%
T 1A 6-00021-610 T1.5-1-X65 Transformer
T 1B 6-00021-610 T1.5-1-X65 Transformer
T 1C 6-00021-610 T1.5-1-X65 Transformer
T 1D 6-00021-610 T1.5-1-X65 Transformer
T 1T 6-00021-610 T1.5-1-X65 Transformer
U 1 3-00088-340 LF353 Integrated Circuit (Thru-hole Pkg)
U 2 3-00088-340 LF353 Integrated Circuit (Thru-hole Pkg)
U 3 3-00088-340 LF353 Integrated Circuit (Thru-hole Pkg)
U 5A 3-00196-335 HS-212S-5 Relay
U 5B 3-00196-335 HS-212S-5 Relay
U 5C 3-00196-335 HS-212S-5 Relay
U 5D 3-00196-335 HS-212S-5 Relay
U 5T 3-00196-335 HS-212S-5 Relay
Z 0 0-00051-056 RG174 Cable, Coax & Misc.
Z 0 0-00122-053 2-1/4" #24 Wire #24 UL1007 Strip 1/4x1/4 Tin
Z 0 0-00132-053 6-1/2" #24 Wire #24 UL1007 Strip 1/4x1/4 Tin
Z 0 0-00136-053 8-1/2" #24 Wire #24 UL1007 Strip 1/4x1/4 Tin
Z 0 0-00207-003 TO-5 Insulators
Z 0 0-00407-032 SOLDR SLV RG174 Termination
Z 0 1-00047-130 14 PIN IDP Connector, Male
Z 0 1-00048-171 14 COND Cable Assembly, Ribbon
Z 0 6-00019-630 FB43-101 Ferrite Beads

REF# SRS PART # VALUE DESCRIPTION
Z 0 0-00185-021 6-32X3/8PP Screw, Panhead Phillips
Z 0 0-00187-021 4-40X1/4PP Screw, Panhead Phillips
Z 0 0-00189-016 F0104 Power Button
Z 0 0-00190-030 #8X1" Spacer
Z 0 0-00191-068 3658 Springs
Z 0 0-00195-020 6-32X3/8PF Screw, Flathead Phillips
Z 0 0-00200-043 #8 SHOULDER Washer, nylon
Z 0 0-00204-000 REAR FOOT Hardware, Misc.
Z 0 0-00222-021 6-32X1/4PP Screw, Panhead Phillips
Z 0 0-00500-000 554808-1 Hardware, Misc.
Z 0 0-00590-066 0097-0555-02 Copper Foil Tape, Self Adhesive
Z 0 1-00048-171 14 COND Cable Assembly, Ribbon
Z 0 1-00050-171 16 COND Cable Assembly, Ribbon
Z 0 1-00051-171 20 COND Cable Assembly, Ribbon
Z 0 1-00052-171 40 COND Cable Assembly, Ribbon
Z 0 7-00071-720 DG535-24 Fabricated Part
Z 0 7-00072-720 DG535-25 Fabricated Part
Z 0 7-00073-720 DG535-33 Fabricated Part
Z 0 7-00122-720 DG535-36 Fabricated Part
Z 0 7-00123-720 DG535-57 Fabricated Part
Z 0 9-00797-924 1/2" WIDE ADHES Tape, All types

Miscellaneous and Chassis Assembly Parts List

REF# SRS PART # VALUE DESCRIPTION
U 402 3-00161-342 27128-150 EPROM/PROM, I.C.
Z 0 0-00167-023 6-32X1/2RP Screw, Roundhead Phillips
Z 0 0-00179-000 RIGHT FOOT Hardware, Misc.
Z 0 0-00180-000 LEFT FOOT Hardware, Misc.

38

39

40

41

FAST TRANSITION-TIME
MODULES

OPTION 04A: 100 ps RISETIME

OPTION 04B: 100 ps FALLTIME

OPTION 04C: BIAS TEE

INTRODUCTION

Available as options for the Digital Delay /
Pulse Generator, these modules will enhance the
leading or trailing edge pulse transition times by
a factor of 20. Applications include time domain
reflectometry measurements, recording the pulse
response of fast amplifiers, checking high speed
digital circuits or use as a low jitter trigger
source in high EMI environments.

The devices consist of a step recovery diode and
matching network mounted in an in-line package
with BNC type connectors. The units provide a fast,
low distortion step into a 50 Ω line with adjustable
amplitudes from 0.5 V to 2.0 V. There is a fixed
negative offset of -0.8 VDC for the fast risetime
model, and +0.8 VDC for the fast falltime model.
These units can provide step amplitudes of up to 3.7
V with some increase in distortion, and up to 15 V
when used with option 02 (rear panel outputs) and
option 04C (bias tee).

OPERATION

For step amplitudes of less than 3.7 V the fast
transition time units should be attached directly to
the front panel of the DG535.

SPECIFICATIONS

When used on front panel with 50 Ω load.

OPTION 04A: FAST RISETIME OPTION 04B: FAST FALLTIME

Output Amplitude1 0.5 to 2.0 VDC Output Amplitude1 -0.5 to -2.0 VDC

Output Offset -.8 VDC, typ. Output Offset +0.8 VDC, typ.

Transition Time Transition Time
Rise (20/80%) 100 ps, max. Rise (20/80%) 2500 ps, max.
Fall (20/80%) 2000 ps, max. Fall (20/80%) 100 ps, max.

Pulse Aberrations Pulse Aberrations
Foot 4%, typ. Foot 4%, typ.
Ring ±5%, typ. Ring ±5%, typ.

Warranty: One year parts and labor on materials and workmanship.

Note1: Amplitudes up to 3.7 Volts are obtainable with some increase in distortion. Amplitudes up to 15 Volts are
available using DG535 option 02, rear panel ouputs and option 04C, bias tee.

42

SETUP FOR OUTPUT STEPS LESS

THAN 2.0 VOLTS

SETUP FOR OUTPUT STEPS UP TO

3.7 VOLTS

Option 04A, Fast Risetime (All front panel outputs)

LOAD= HIGH-Z Internal 50Ω in place
VARiable output
AMPLITUDE +1 to +4V Output step = AMPLITUDE/2
OFFSET -1.45 to -1.70 V Adjust for best shape

Option 04B, Fast Falltime (T0, A, B, C, D only)

LOAD = HIGH-Z Internal 50Ω in place
VARiable Output
AMPLITUDE -1 to -4V Output step = AMPLITUDE/2
OFFSET +1.45 to +1.70 V Adjust for best shape
__ __
Option 04B, Fast Falltime (AB, AB, CD, CD)

LOAD = HIGH-Z Internal 50Ω in place
VARiable Output
AMPLITUDE +1 to +4V Output step = AMPLITUDE/2
OFFSET=1.6V-AMPLITUDE Adjust for best shape

OUTPUT STEPS LESS THAN 2.0 VOLTS

The output from the fast transition-time units
will have a step amplitude of 1/2 of the
programmed output amplitude from the DG535.
The offset, which may be adjusted for the best
pulse shape on the fast transition, will be about -

0.8 VDC for the fast risetime unit, and about
+0.8 VDC for the fast fall time unit (.ie. 1/2 of
the programmed offset).

The offset is critical to the operation of the
device: the offset is used to forward bias the
step recovery diode (SRD) prior to the pulse
output from the DG535. When the pulse from
the DG535 begins, the stored carriers in the
SRD maintain the conduction in the diode,
shunting the output pulse to ground. When the
stored carriers are depleted (about 3 ns after the
start of the pulse), the diode abruptly stops
conduction, creating a very fast transition time
step at the output.

The offset must be increased when the output
amplitude is increased. The offset should be set
to about 1.45 v for a 1.0 V amplitude, and to
about 1.70 V for a 4.0 V amplitude from the
DG535. The offset may be adjusted for the best
output pulse shape. If the offset is set too high,
the output step will overshoot: if the offset is too
small, the output step will undershoot the final
value.

Option 04A, Fast Risetime (All front panel outputs)

LOAD = 50Ω Removes internal 50Ω
VARiable outputs
AMPLITUDE = 4.0 V
OFFSET = -1.15 V

Option 04B, Fast Falltime (T0, A, B, C, D only)

LOAD = 50Ω Removes internal 50Ω
VARiable outputs
AMPLITUDE = -4.0 V
OFFSET = +1.15 V
__ __
Option 04B, Fast Falltime (AB, AB, CD, CD)

LOAD = 50Ω Removes internal 50Ω
VARiable Outputs
AMPLITUDE = 4.0 V
OFFSET = 1.15V - AMPLITUDE

OUTPUTS STEPS UP TO 3.7 VOLTS

The step size of the output pulse may be increased
to about 3.7 VDC by changing the output
configuration of the DG535. This configuration will
increase the step size and the distortion of the output
pulse.

In each of these cases, the offset of the DG535's
outputs may be adjusted for minimum pulse
distortion. Specifying a load impedance of 50 Ω will
allow larger pulse amplitudes at the expense of
increased ringing after the fast transition. Pulse
aberrations after the fast transition will be about
10%, or about 3x larger than the pulse aberrations
when a high impedance load is specified.

OUTPUT STEPS UP TO 15 VOLTS

The fast rise time (option 04A) and fast fall time
(option 04B) units may be used with the high
voltage rear panel outputs (option 02) to generate
step sizes up to 15 V. A bias tee, Option 04C, is
required for this mode of operation.

The high voltage rear panel outputs are ac coupled
hence some accommodation must be made to
provide a dc current to forward bias the SRD prior
to the output pulse. This current is applied via a bias
tee (Option 04C) which passes the bias current
through an inductor to the diode. The same inductor

43

SETUP FOR OUTPUT STEPS UP TO

j

15 VOLTS

Option 04A, Fast Risetime (All rear panel outputs)

LOAD = 50 Ω
VARiable output
AMPLITUDE +0.5 to +4.0 Output step= 5x Amplitude
OFFSET -1 to -3 V Adjust for best pulse shape

Option 04B, Fast Falltime (All rear panel outputs)

LOAD = 50 Ω
VARiable output
AMPLITUDE -0.5 to -4.0 Output step = 5x
Amplitude
OFFSET +1 to +3 V Ad

ust for best pulse shape

IMPORTANT

DO NOT CONNECT THE FAST
TRANSITION UNITS DIRECTLY TO THE
REAR PANEL OUTPUTS: ALWAYS USE
WITH THE BIAS TEE. OTHERWISE, THE
SRD CAN BE DAMAGED IF THE WRONG
POLARITY PULSE IS SPECIFIED OR IF
THE REVERSE BREAKDOWN VOLTAGE
IS EXCEEDED. THE BIAS TEE CONTAINS
A SERIES RESISTOR SO THAT THE
DG535 CANNOT DAMAGE THE SRD.

prevents the pulse from the rear panel output
from passing to the bias source.

The bias tee is placed between rear panel output
and the fast transition-time unit. A series resistor
in the bias tee will attenuate the output pulse
and protect the SRD against output pulses of the
wrong polarity. A good source for the bias
current is the corresponding front panel output:
attach the bias tee directly to the rear panel and

connect the bias input to the corresponding front
panel output with a coax cable. Connect the fast
transition-time unit directly to the bias tee.

The bias current for the fast transition-time unit may
also come from an external bias circuit which
should be limited so that the absolute maximum
current rating for the SRD (100 mA) is not
exceeded. A forward bias current of about 40 mA
will be required for a 15 V output pulse.

44