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TM 11-6625-2980-14
TECHNICAL MANUAL
OPERATOR'S, ORGANIZATIONAL,
DIRECT SUPPORT AND GENERAL
SUPPORT MAINTENANCE MANUAL
FOR
PULSE GENERATOR AN/USM-359A
(NSN 6625-01-077-4620)
(TEKTRONIX MODEL PG 508 WITH TM 503)
HEADQUARTERS, DEPARTMENT OF THE ARMY
27 MARCH 1981
TM 11-6625-2980-14
SAFETY SUMMARY
This manual contains safety information which the user must follow to ensure safe operation of this instrument.
WARNING information is intended to protect the operator; CAUTION information is intended to protect the instrument.
The following general safety precautions must be observed during all phases of operation, service, and repair of this
instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the instrument.
Warning statements precede potentially dangerous procedures throughout this manual. The instructions contained in
the warnings must be followed. The following warning statements are found in this manual.
WARNING
Use a proper power source. This instrument is designed to operate from a power source with its neutral
at or near ground potential with a separate safety-earth conductor. It is not intended for operation from
two phases of a multi-phase system, or across the legs of a single-phase, three-wire system.
WARNING
Avoid live circuits. Dangerous voltages exist at several points throughout this instrument. When the
instrument is operated with the cover removed, do not touch exposed connections or components. Some
transistors have voltages present on their cases. Disconnect power before cleaning the instrument or
replacing parts.
WARNING
Avoid contact with chemicals. Handle silicone grease with care. Avoid getting silicon-in grease in
eyes. Wash hands thoroughly after use.
WARNING
Adequate ventilation should be provided while using TRICHLOROTRIFLUOROETHANE. Prolonged
breathing of vapor should be avoided. The solvent should not be used near heat or open flames; the
products of decomposition are toxic and irritating. Since TRICHLOROTRIFLUOROETHANE dissolves
natural oils, prolonged contact wit h skin should be avoided. When necessary,-use gloves which the
solvent cannot penetrate. If the solvent is taken internally, consult a-physician immediately.
WARNING
Compressed air is dangerous and can cause serious bodily harm if protective means or methods are not
observed to prevent a chip or particle (of whatever size) from being blown into the eyes or unbroken skin
of the operator or other personnel. Compressed air shall not be used for cleaning purposes except where
reduced to less than 30 p.s.i.f. and then only with effective chip guarding and personnel protective
equipment. Do not use compressed air to dry parts when Trichlorotrifloroethane has been used.
CAUTION
Avoid power surge damage. Do not remove or install plug-in unit while power is on as damage may
occur to circuitry.
TM 11-6625-2980-14
This manual contains copyright material reproduced b)y permission of Tektronix. Inc.
TECHNICAL MANUAL HEADQUARTERS
DEPARTMENT OF THE ARMY
No. 11-6625-2980-14 WASHINGTON, DC, 27 March 1981
OPERATOR'S, ORGANIZATIONAL, DIRECT SUPPORT, AND
GENERAL SUPPORT MAINTENANCE MANUAL
FOR
GENERATOR, PULSE AN/USM-359A
(TEKTRONIX MODEL PG 508 WITH TM 503)
(NSN 6625-01-077-4620)
REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS
You can help improve this manual. If you find any mistakes or if you know of a way to
improve the procedures, please let us know. Mail your letter, DA Form 2028 (Recommended
Changes to Publications and Blank Forms), or DA Form 2028-2 located in back of this
manual direct to: Commander, US Army Communications and Electronics Materiel
Readiness Command, ATTN: DRSEL-ME-MQ, Fort Monmouth, New Jersey 07703.
This manual is an authentication of the manufacturer's commercial literature which, through usage, has been found to
cover the data required to operate and maintain this equipment. Since the manual was not prepared in accordance with
military specifications, the format has not been structured to consider levels of maintenance.
TM 11-6625-2980-14
TABLE OF CONTENTS
Page Page
Section 0 INTRODUCTION 0-1 APPENDIX A TM 503 MAINFRAME
Section I. INSTALLATION PROCEDURE A-1
SECTION 1 OPERATING INSTRUCTIONS
Instrument Description 1-1 Section II. TM 503 OPERATING
INSTRUCTIONS A-3
Installation and Removal 1-1 Introduction A-3
BASIC OPERATION 1-2 Powering Up A-3
Period and Duration Selection 1-2 Building a System A-5
Duty Factors 1-2 Specifications A-6
Delayed and Paired Pulse Selection 1-2
Transition Time Selection 1-3 Section III.
TM 503 SYSTEM MAINTENANCE A-7
Transition Time Selection 1-3 General A-7
External Triggering and Gating 1-3 Troubleshooting Aids A-8
Trigger Output 1-4 Troubleshooting Techniques A-8
Manual Trigger 1-4 Parts Replacement A-10
Control Error Light 1-4 Diagrams and Circuit Board
Control Error Light 1-4 Illustrations A-14
OPERATING CONSIDERATIONS 1-4 Power Module Interface Pin
Output Termination's and Assignments A-15
Connections 1-4 Detailed Block Diagram A-16
Connections 1-4 Parts Location Grid A-17
Rise Time Measurements in Linear Parts Location Grid A-17
Systems 1-5 Replaceable Mechanical Parts A-19
Counted Burst Using the DD 501 APPENDIX B REFERENCES
External Voltage Control 1-5
Digital Delay Unit 1-5
Definitions of Pulse Characteristics 1-8 APPENDIX C COMPONENTS OF END ITEM AND
SPECIFICATIONS 1-9 BASIC ISSUE ITEMS LIST
Environmental Requirements 1-11 Section I. INTRODUCTION C-1
Using the Rear Interface Scope C-1
Connectors 1-12 General C-1
Explanation of Columns C-1
SECTION 2 THEORY OF OPERATION
Introduction 2-1 Section II. COMPONENTS OF END ITEM C-2
Input Circuitry 2-1 Section III. BASIC ISSUE ITEMS C-3
~ TRIG'D/GATED Light Circuitry 2-1
Triggered Mode 2-1 APPENDIX D ADDITIONAL AUTHORIZATION
Period Generator 2-2 LIST (Not Applicable)
Delay Generator 2-2
Duration Generator 2-2 APPENDIX E MAINTENANCE ALLOCATION
Duration and Delay Control Error Section I. INTRODUCTION E-1
Light Circuitry 2-3 General E-1
Variable Transition Time Circuitry 2-3 Maintenance Function E-1
Transition Time Control Error Column Entries E-2
Light Circuitry 2-3 Tool and Test Equipment
Level Control Multiplier 2-5 Requirement E-2
Output Amplifier 2-6
Power Supply 2-6 Remarks E-2
Section II. MAINTENANCE ALLOCATION
SECTION 3 SERVICE INFORMATION CHART OR PULSE
Symbols and Reference Designators 3-1 GENERATOR AN/USM-359A E-3
General Maintenance and Section III. TOOL AND TEST EQUIPMENT
Adjustments 3-2 REQUIREMENTS FOR PULSE
Maintenance 3-2 GENERATOR AN/USM-359A E-5
Circuit Board Removal 3-2
Circuit Board Removal 3-2 APPENDIX F EXPENDABLE SUPPLIES AND
Test Equipment 3-2 MATERIALS LIST
General 3-2 Section I. INTRODUCTION F-1
SECTION 4 CONTROLS AND CONNECTORS Scope F-1
AND SCHEMATIC DIAGRAMS 4-1 Explanation of Columns F-1
SECTION 5 REPLACEABLE MECHANICAL Section II. EXPENDABLE SUPPLIES AND
PARTS LIST 5-1 MATERIALS F-2
iii
TM 11-6625-2980-14
LIST OF ILLUSTRATIONS
Fig. Page Page
No. No. No.
1-0 Pulse Generator AN/USM-359A. vi FO-1 Controls and connectors. 4-1
1-1 PG 508 installation and removal. 1-1 FO-2 Block diagram. 4-3
1-2 Locations of period, delay and duration FO-3 Input circuit schematic diagram. 4-5
custom timing capacitors and TRIG/GATE FO-4 Period generator schematic diagram. 4-7
input impedance switch. 1-2 FO-5 Delay generator schematic diagram. 4-9
1-3 Location for transition custom timing FO-6 Duration generator and control error circuit
capacitor. 1-3 schematic diagram. 4-11
1-4 Equivalent circuit of external input for output FO-7 Transition time generator schematic diagram. 4-13
voltage control. 1-5 FO-8 Level control multiplier schematic diagram.4-15
1-5 Location of trigger jumpers in DD 501 for FO-9 Output amplifier schematic diagram. 4-17
selecting trigger or delay interval output 1-6 FO-10 Tracking voltage supply schematic diagram. 4-19
1-6 PG 508-DD 502 interconnections for counted FO-11 PG 508 power supply schematic diagram. 4-21
burst operation.1-6 FO-12 TM 503 power supply schematic diagram. 4-23
1-7 Typical propagation delays using PG 508 with 5-1 Al board component locations. 5-2
DD 501 in counted burst mode at 50 MHz FO-13 A2 board component locations. 5-3
repetition rate. 1-7 FO-14 A3 board component locations. 5-5
1-8 Pulse characteristics. 1-8 FO-15 A4 board component locations. 5-7
1-9 Locations for user installed rear interface FO-16 PG 508 exploded view. 5-9
connections. 1-12
2-1 Simplified schematic for
control error indicator
logic with control settings
causing illumination. 2-4
iv
TM 11-6625-2980-14
Figure 1-0 . Pulse generator AN/USM-359A
vi
TM 11-6625-2980-14
SECTION O
INTRODUCTION
Scope c. Discrepancy in Shipment Report (DISREP) (SF
361). Fill out and forward Discrepancy in Shipment
This manual describes Pulse Generator AN/USM- Report (DISREP) (SF 361) as prescribed in AR 55-38/
359A and provides instructions for operation and NA.VSUPI NST 4610.33B/AFR 75-18/MCO P4610.19C
maintenance. Throughout this manual, the SG- and DLAR 4500.15.
1178/USM-359A is referred to as Tektronix Model PG
508 and PP-7578/USM 359A is referred to as TM 503. Reporting Equipment Improvement
Recommendations (EIR)
Indexes of Publications
If your AN/USM-359A needs improvement, let us
a. DA Pam 310-4. Refer to the latest issue of DA know. Send us an EIR. You, the user, are the only one
Pam 310-4 to determine whether there are New who can tell us what you don't like about your
editions, changes, or additional publications pertaining equipment. Let us know why you don't like the design.
to the equipment. Tell us why a procedure is hard to perform. Put it on an
SF 368 (Quality Deficiency Report). Mail it to
b. DA Pam 310-7. Refer to DA Pam 310-7 to Commander, US Army Communications and Electronics
determine whether there are modification work orders Materiel Readiness Command, ATTN: DRSEL-ME-MO,
(MWO's) pertaining to the equipment. Fort Monmouth, New Jersey 07703. We'll send you a
reply.
Maintenance Forms, Records, and Reports
Administrative Storage
Reports of Maintenance and Unsatisfactory
Equipment. Department of the Army forms and To prepare the equipment for administrative
procedures used for equipment maintenance will be storage, ascertain its operability and reliability. In
those prescribed by TM 38-750, The Army Maintenance addition, use the proper packing materials.
Management system (Army).
Destruction of Army Electronics Materiel
b. Report of Item and Packaging Discrepancies. Fill
out and forward SF 364 [Report of Discrepancy (ROD)] Destruction of Army electronics materiel to prevent
as prescribed in AR 735-11-2/DLAR enemy use shall be in accordance with TM 750-244-2.
4140.55/NAVMATINS4355.73/AFR 400-54/MCO
4430.3E.
0-1
TM 11-6625-2980-14
Section 1-PG 508
OPERATING
INSTRUCTIONS
Instrument Description The front panel is color coded for easy reference to
controls and their associated functions. Green indicates
The PG 508 is a 50 MHz general purpose full triggering functions and blue indicates mode functions.
function pulse generator usable in all TM 500-series
power modules except the TM 501. It is compatible with Installation and Removal
MOS and other general purpose circuitry. Important
features of the instrument include independent period The PG 508 is calibrated and ready for use when
and duration controls with a control error light, received. It operates in any two compartments of the TM
independent pulse top and bottom level controls, 500-series power modules. See Appendix A for line
variable leading and trailing transition time adjustments, voltage requirements and power module operation. Fig.
and fully adjustable pulse delay capabilities. Front panel 1-1 shows the installation and removal procedure. Make
controls and connectors provide a trigger or certain the power module is off when inserting or
synchronous gate input with level and slope controls, removing the PG 508. Check that the PG 508 is fully
square wave output and complementary pulse output for inserted in the power module. Pull the power switch on
high duty factors. Delayed and paired pulse and manual the power module. The POWER light on the PG 508
trigger or gate capabilities are also provided. All inputs should now be on. Refer to the Controls and Connectors
and outputs are internally terminated in 50 n except the foldout page in Section 4 of this manual for a complete
TRIG/GATE input which is internally selectable for description of the front panel controls and connectors.
either 50 n or 1 Mn, 20 pF input impedance. Special
positions on PERIOD, DURATION, DELAY, and
TRANSITION controls permit customized control
ranges.
Fig. 1-1. PG 508 installation and removal.
1-1
TM 11-6625-298014
BASIC OPERATION 10-2 or a 500pF capacitor. If a polarized capacitor is
used, observe the correct polarity. Use at least a 6 V
Period and Duration Selection rated capacitor. Connect this capacitor as shown in Fig.
1-2.
The period generator operates, in all modes except
EXT TRIG or MAN, at a rate set by the PERIOD range Duty Factors
switch and variable control. The duration of the output
pulse is set by the DURATION range switch and Duty factors greater than those specified are obtainable
variable control. When the DURATION control is set for on several ranges. When the duty factor is increased to
a time greater than the PERIOD, the CONTROL the point that internal circuitry prevents completion of
ERROR lamp will light. When the DURATION control is the pulse waveform, the CONTROL ERROR light will
set to the SQ WAVE position, the duration time is flash. To further increase the duty factor, switch to the
determined internally at approximately 50% of the complement mode. Set the DURATION control for a
period time. pulse width equal to the desired pulse off time and push
the front panel COMPLEMENT (-) pushbutton.
The custom range positions on the PERIOD and
DURATION controls permit user-selected period and Delayed and Paired Pulse Selection
duration times. To determine the approximate capacitor
value for the desired period, multiply the period time in In the pulse delay mode, the output pulse is delayed
seconds by 5 X 10-3. The result is the value of the from the +TRIG OUT signal by the DELAY time
capacitor in Farads. For example, a 50 ms period times selected plus a specified fixed delay. In the PAIRED
5 X 10-3 equals 250 X 10- or 250 HF. This capacitor mode of operation, the delay controls the time between
must be non-polarized and have at least a 6 V rating. the leading edges of the paired pulses. To use this
Solder this capacitor in the position shown in Fig. 1-2. feature push the DELAY button and trigger the external
device from the +TRIG OUT jack. Set the DELAY
To determine the capacitor value for the duration control for the desired delay time from trigger to pulse
time desired, multiply the duration time by 1 X 10-2. For leading edge. Use the variable control labeled CAL for
example a 50 ms duration time requires 50 ms times 1 time adjustments between steps or to increase the delay
X times beyond the steps.
Fig. 1-2. Locations of period, delay and duration custom timing capacitors and TRIG/GATE IN input
impedance switch. Remove the Input board to gain access to the delay pads.
1-2
TM 11-6625-2980-14
Paired pulses are obtained by pushing both the
DELAY and UNDLY buttons. An initial pulse now occurs
at external trigger time with the second or paired pulse
delayed by the selected delay time. The CONTROL
ERROR light illuminates if the delay is too short or long
for a valid pulse train. A custom delay position is
provided on the DELAY switch. To determine the value
of the capacitor required, multiply the desired delay time
in seconds by 1 X 10-2. For example, a 50 ms delay
time requires a 500 Pf capacitor (50 ms times 1 X 10-2).
Use either a polarized or non-polarized capacitor with a
rating of at least 6 V. If a polarized capacitor is used,
observe the polarity markings. Remove the input board
and connect the capacitor as shown in Fig. 1-2.
Transition Time Selection
The leading and trailing times of the pulses may be
varied by using the TRANSITION TIME control and the
LEADING and TRAILING variable controls. Select the
desired transition time range with the TRANSITION Fig. 1-3 . Location for transition custom timing
TIME control and vary the leading and trailing times capacitor .
independently with the LEADING and TRAILING
controls. The pulse high and low levels can be preset. Push
A custom range position is also provided on the the PRESET button and adjust the HIGH LEVEL and the
TRANSITION TIME control. To select the correct LOW LEVEL potentiometers with a screwdriver for the
capacitor (in Farads) for this range, multiply the desired desired output levels.
transition time (in seconds) measured from 10% to 90%
points, by 4.4 X 10-'. For example, a desired transition External Triggering and Gating
time of 50 ms requires a capacitor of 220 HF. Connect
To change the TRIG/GATE IN input impedance
the capacitor as shown in Fig. 1-3. Use a capacitor with
remove the plug-in from the mainframe. Remove the
at least a 10 V rating and observe polarity requirements.
left side cover. Set the slide switch, located on the Input
When the transition times become large compared
board and labeled Input Impedance, to either the 50 n or
with the duration or period times and the pulse does not
the 1 MO position. In the 1 MO position the shunt
reach full amplitude, the CONTROL ERROR light will
capacitance is approximately 20 pF. A standard
flash indicating improper control settings.
oscilloscope probe can be used to acquire the triggering
signal from the external circuitry. If a compensated
Output Levels probe is used, calibrate the probe on the input of a 1 M)
The output amplitude and offset are selected by 20 pF oscilloscope first. A 10X probe allows triggering
independent pulse LOW LEVEL and HIGH LEVEL directly from high impedance sources such as MOS
controls. Use the front panel voltage calibration marks digital circuitry with an effective TRIG/GATE LEVEL
for an open circuit load and divide the values by two range of ◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo