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TM 11-6625-2921-14&P
TECHNICAL MANUAL
OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT,
AND GENERAL SUPPORT MAINTENANCE MANUAL
INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS
FOR
SIGNAL GENERATOR SG-1054/G
(STELMA MODEL PG-303A)
(NSN 6625-00-137-7738)
HEADQUARTERS,
DEPARTMENT OF THE ARMY
16 JANUARY 1980
This manual contains copyright material reproduced by permission of the
Stelma Corporation.
TM 11-6625-2921-14&P
HEADQUARTERS
DEPARTMENT OF THE ARMY
Washington, DC 16 January 1980
Technical Manual
No. 11-6625-2921-14&P
OPERATOR’S ORGANIZATIONAL, DIRECT SUPPORT,
AND GENERAL SUPPORT MAINTENANCE MANUAL
INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS
FOR
SIGNAL GENERATOR SG-1054/G
(STELMA MODEL PG-303A)
(NSN 6625-00-137-7738)
REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS
If you find any misYou can help improve this manual.
takes or if you know of a way to improve the procedures,
please let us know. Mall your letter, DA Form 2028 (Recommended Changes to Publications and Blank Forms), or DA Form
2 0 2 8 - 1 l o c a t e d i n b a c k o f t h i s m a n u a l d i r e c t t o : Commander,
US Army Communications and Electronics Materiel Readiness
Command, ATTN: DRSEL-ME-MQ, Fort Monmouth, New Jersey,
07703.
In either case, a reply will be furnished direct to you.
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.
The manual was not prepared in
accordance with military specifications; therefore, the format has not
been structured to consider categories of maintenance.
CONTENTS
Page
0
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 1
(A)
(B)
(C)
(D)
(E)
(F)
1
Scope . . . . . . . . . . . . . . . . . . . . . . . . .
Indexes of Publications . . . . . . . . . . . . . . . .
Maintenance Forms, Records and Reports . . . . . . . . .
Reporting Equipment Improvement Recommendations (EIR) .
Administrative Storage . . . . . . . . . . . . . . . . .
Destruction of Army Electronics Materiel . . . . . . . .
.
.
.
.
.
.
1
1
1
1
1
1
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
(A)
(B)
Electrical Description .
Equipment Description..
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . .
.
.
2
5
Page i
CONTENTS - Continued
PAGE
.
.
.
6
8
14
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . .
24
(A) Circuit Connections. . . . . . . . . . . . . . . . . .
(B) Operating Procedures . . . . . . . . . . . . . . . . . .
24
25
PRINCIPLES OF OPERATION. . . . . . . . . . . . . . . . . . .
29
(A) General . . . . . . . . . . . . . . . . . . . . . . . .
(B) Over-All Functional Description . . . . . . . . . . . .
(C) Logic and Circuit Descriptions . . . . . . . . . . . . .
29
29
32
MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . .
52
(A)
(B)
(C)
(D)
(E)
.
.
.
.
.
52
53
58
66
66
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . .
115
(A) Introduction . . . . . . . . . . . . . . . . . . . . . .
(B) Parts List, Tablular Listing . . . . . . . . . . . . . .
115
116
(C) Performance Specifications . . . . . . . . . . . . . .
(D) Description of Controls and Indicators . . . . . . . .
(E) Installation. . . . . . . . . . . . . . . . . . . . .
2
3
4
5
Required Test Equipment .
Performance Tests . . . .
Troubleshooting and Fault
Repairs . . . . . . . .
Power Supply Adjustment
. . . . .
. . . . .
Isolation .
. . . . .
Procedures
.
.
.
.
.
.
.
.
.
.
. .
. .
. .
. . .
. . .
. .
. .
. .
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APPENDIXES
A
References.
.
. . . . . . . . . . .
A-1
B
Components of End Item List . . .
. . . . . . . . . . .
B-1
C
Additional
D
Maintenance Allocation . . . . . . . . . . . . . . . . .
E
Expendable Supplies and Materials List
F
Repair
Page ii
Parts
.
.
.
.
.
.
Authorization
and
Special
.
.
.
List
Tools
.
(Not Applicable)
List
.
.
D-1
(Not Applicable)
.
.
.
.
.
.
.
.
F-1
O.
INTRODUCTION
(A) Scope
0.01 This manual describes Signal Generator SG-1054/G and provides ins t r u c t i o n s f o r o p e r a t i o n a n d m a i n t e n a n c e . Throughout this manual,
the SG-1054/G is referred to as the Pattern Generator.
(B) Indexes of Publications
0.02 DA Pam 310-4. Refer to the latest issue of DA Pam 310-4 to determine whether there are new editions, c h a n g e s , o r a d d i t i o n a l p u b l i cations pertaining to the equipment.
0.03 DA Pam 310-7. Refer to DA Pam 310–7 to determine whether there are
modification work orders (MWO’s) pertaining to the equipment.
(C) Maintenance Forms, Records, and Reports
0.04 Reports of Maintenance and Unsatisfactory Equipment. Department of
the Army forms and procedures used for equipment maintenance will
be those prescribed by TM 38-750, The Army Maintenance Management System.
0.05 Report of Packaging and Handling Deficiencies. Fill out and forward
DD Form 6 (Packaging Improvement Report) as prescribed in AR 700-58/
NAVSUPINST 4030.29/AFR 71-13/MCO P4030.29A, and DLAR 4145.8.
0.06 Discrepancy in Shipment Report (DISREP) (SF 361). Fill out and forward Discrepancy in Shipment Report (DISREP) (SF 361) as prescribed
in AR 55-38/NAVSUPINST 4610.33B/AFR 75-18/MCO P4610.19C and DLAR 4500.15.
(D) Reporting Equipment Improvement Recommendations (EIR)
0.07 If your Signal Generator SG-1054/G needs improvement, let us know.
Send us an EIR. Y o u , t h e u s e r , are the only one who can tell us
what you don’t like about your equipment.
Let us know why you don’t like
Put it on an
t h e d e s i g n . Tell us why a procedure is hard to perform.
S F 3 6 8 ( Q u a l i t y D e f i c i e n c y R e p o r t ) . Mail it to Commander, US Army Communications and Electronics Materiel Readiness Command, ATTN: DRSEL-MEMQ, Fort Monmouth, New Jersey 07703. We’ll send you a reply.
(E) Administrative Storage
0.08 To prepare the equipment for administrative storage, ascertain its
o p e r a b i l i t y a n d r e l i a b i l i t y . I n a d d i t i o n , use the proper packing
materials.
(F) Destruction of Army Electronics Materiel
0.09 Destruction of Army electronics materiel to prevent enemy use shall
be in accordance with TM 750-244-2.
Page 1
1. GENERAL
1.01 This manual describes installation, operation, theory, and maintenance of the
PG-303A Pattern Generator. A complete listing of replaceable parts and complete schematic coverage are provided at the end of the manual.
1.02 The Pattern Generator (Fig. 1) is a c o m p a c t , solid-state digital test set designed
to generate a wide variety of telegraph test signal patterns having predetermined
a n d c o n t r o l l a b l e c h a r a c t e r i s t i c s a n d p a r a m e t e r s . The Pattern Generator is intended for
use in conjunction with associated data measuring equipment to test and and evaluate
the performance of data/telegraph systems or equipment.
(A)
Electrical
Description
1.03 The Pattern Generator functions as a seIf-contained test signal generator operating from a 115/230-volt ac power source. For descriptive purposes the unit
may be considered to consist of four principal sections:
(a) S i g n a l p a t t e r n s a n d m o d e s .
(b) Distortion generation.
(c) Output circuits.
(d) Power supplies.
Signal Patterns and Modes
1.04
The Pattern Generator is capable of generating the following telegraph code output signal patterns:
(a)
Steady Mark or steady Space.
(b)
Reversals. Alternate Mark and Space bits in a serial stream at the selected bit
rate.
Fig. 1 - Front View - PG-303A Pattern Generator
Page 2
( c ) S e l e c t e d C h a r a c t e r s . A repeating sequence of one to six characters; these chara c t e r s m a y b e 5 - , 6 - , 7 - , o r 8 - l e v e l c o d e . A carriage-return/line-feed sequence
is automatically inserted after each 72 characters in the 5-level and 8-level code.
This automatic feature may be disabled via a rear-panel control switch. If less than
six characters is generated, the balance of unselected characters will be “filled out”
as a steady Mark to allow for answer-back character-receipt or other test purposes.
(d) FOX Message. A 5-level (baudot) or 8-level (ASCII) FOX test message having the
following contents:
5-Level (Baudot) Test Message
<< Z+ THE > QUICK > BROWN > FOX > JUMPS > OVER > THE > LAZY > DOG
>+1234567890 >* DE >ABCDEF > TEST*
8-Level (ASCII) Test Message
D EL << = THE > QUICK >BROWN > FOX > JUMPS > OVER > THE > LAZY > DOG
>1234567890 >DE > DEL DEL >ABCDEF > TEST
Symbol Legend: <
=
>
*
~
DEL
Carriage return
Line feed
Space
Upper case characters
Iower case characters
Delete
Note: The group of six representative characters, ABCDEF, is not a fixed part of
the FOX message. This group is derived from the front-panel switch matrix. The
operator may program any six station identification characters for this portion of
the total test message.
(e) Random Pattern. A repeating 511-bit (common or CCITT) or 2047-bit pseudorandom pattern for making error-count tests.
1.05 The test patterns may be produced as a repetitive serial stream (free running) or
may be stepped one character or one sequence at at time by use of a front-panel
control or by receipt of an externally generated step pulse.
1.06 The test patterns may be start-stop, with 1-, 1.5- or 2-element stop Marks, or
synchronous. The synchronous test patterns do not contain start pulses or stop
Marks in the character sequences.
1.07 The test patterns can be generated at any one of 17 bit rates that are switchselectable from the front panel. Ten of the bit rates are generated by an internal
Page 3
clock, and one bit rate i S derived from an externally generated timing signal. Plug-in
crystal sockets are provided for six customer-specified bit rates in conjunction with
located on the underside of the unit. All of the bit
six optional crystals (see Fig. 2)
rates can be selected by a front-panel control.
1.08 The 8-level (ASCII) test patterns may contain a parity-bit in the eighth bit Posit i o n . An internal strapping option is provided to permit even, odd, or no parity
(Mark always in the eighth bit).
Distortion Generation
1.09 The Pattern Generator output data patterns may be programed with distortion in
known, adjustable amounts ranging from 0 to 48 per cent in 1-per-cent increments.
Fig. 2 - Bottom View - Pattern Generator with Access Plate Removed
Page 4
The type of distortion introduced on the output signal is selectable and may be any
one of the following:
(a) Marking bias.
(b) Spacing bias.
(c) Switched bias.
(d) Marking end
Start-stop signal pattern only.
(e) Spacing end
Output Circuits
1.10
The Pattern Generator output circuits provide two levels of signal output as
follows :
(a)
Low-level logic (+6 volts) which may be internally strapped to conform with
EIA standard RS-232B or MIL-STD-188B.
b)
High-level electronic relay contact closures for neutral, polar, or Bell System
electronic hub circuits.
A 12-pin female cable connector for signal interfacing to other data equipment,
through an optional Data Set Adapter, is provided on the front panel of the
Pattern Generator.
1.11
Power Supplies
1.12 Operating power for the Pattern Generator circuitry is derived from three internal,
regulated dc power supply circuits furnishing +5 volts, +15 volts, and -15 volts.
F u s i n g p r o t e c t i o n i s p r o v i d e d in the ac primary input circuit and in each dc leg of the
three different supply circuits. In addition, an over-voltage protection circuit that
protects the integrated-circuit modules from bum-out is an integral part of the +5-volt
p o w e r s u p p l y . Operating ac power is applied via a detachable ac line cord to a connector at the rear of the unit and is controlled by a front-panel illuminating rocker
switch.
(B)
Equipment Description
1.13 The Pattern Generator may be contained in a portable carrying case, or it may be
adapted to rack mounting by using a pair of mounting brackets. The portable
carrying case consists of detachable front and rear covers. Storage space is provided
in the front cover for the power and signal cables.
1.14 All operating controls and indicators are mounted on the front panel. Fuses and
i n f r e q u e n t l y u s e d c o n n e c t o r s a n d t e r m i n a l s a r e located on a s m a l l s u b - p a n e l
having a hinged door at the rear of the unit (see Fig. 3). Access to the eight plug-in
printed-circuit (PC) cards is obtained at the rear of the unit. It is n o t n e c e s s a r y t o
Page 5
Fig. 3 - Rear View - Pattern Generator with Panel in Place
remove the chassis from the metal cabinet in order to remove these assemblies. A PCcard extender for test and troubleshooting is provided and stored in the slot
marked A9, directly under assembly A7 (see Fig. 4).
(c)
Performance
Specifications
1.15 Performance specifications for the Pattern Generator are provided in Table I,
which includes a description for each performance item listed.
Fig. 4 Rear View- Pattern Generator with Panel Removed
Page 6
TABLE I
PERFORMANCE SPECIFICATIONS
ITEM
DESCRIPTION
Output Signals:
Patterns
FOX message (S-level or 8-level code), reversal!
selected characters (5-, 6-, 7-, 8-level code),
random pattern and steady Mark or Space.
Bit Rates
Ten fixed rates (bits per second): 37.5, 50, 75,
150, 300, 600, 1200, 2400, 4800, 9600.
Input for external timing source, and provisions
for six plug-in crystals providing six additional
rates (customer option).
External Timing Signal Requirements
Polar square-wave, ±6 volts, at 200 times the
desired data rate.
Programmable Distortion:
Types
Marking bias, Spacing bias, switched bias
(alternate Mark/Space bias on a character basis)
Marking end, and Spacing end.
Amount
0 to 48 per cent in 1-per cent steps.
Modes:
Synchronous:
Free-run and external bit sync.
start-stop:
Free-run and stepped (manually or externally)
output Levels:
High
Polar, +130 to -130 volts, 10 to 30ma; neutral,
zero to 230 volts, 20 or 60ma; Bell System electronic hub, -130-volt Space closure to standard
hub pot. (Loop batteries externally supplied.)
Low
Low-level logic output (±6 volts) in accordance
with MIL-STD-188B or EIA standard RS-232B.
Page 7
TABLE I (Cont’d)
DESCRIPTION
ITEM
External Character-Stepping
Signal Requirements:
Polar (±6-volt) square -wave, or positive pulse
0 to +6 volts.
Power Requirements
115/230 volts +10%, 50 to 400Hz ±5%, 20 watts.
Dimensions
17 1/2 inches wide by 5 13/16 inches high by
12 1/4 inches deep.
Weight
18 pounds (approximately) in carrying case.
(D)
Description of Controls and Indicators
1.16 Fig. 5 shows all controls and indicators used during normal operation of the
Pattern Generator, and Table II lists and identifies the reference designation and
function of each control and indicator. The rear-panel terminals and controls are listed and described in Table III and illustrated in Fig. 3.
Fig. 5 - Front Panel Controls - Pattern Generator
Page 8
TABLE II
CONTROLS AND INDICATORS
NAME AND TYPE
CONTROL
POSITION
REF DES
FUNCTION
SELECTED CHARACTERS (48 red
pushbutton
switches)
S10A
through
S10H,
S15A
through
S15H
Characters 1
through 6 (8
bits per
character)
Provide means for programing the
six selected characters of output test signal. When a given
switch is depressed, the bit for
that position becomes a Mark.
Undepressed switches produce
Spaces.
CHARACTER
SEQUENCE
LENGTH (6
black pushbutton
switches)
S16A
through
S16F
(Characters 1
through 6)
Each numbered switch, when
depressed, establishes length of
the SELECTED CHARACTERS
sequence to be generated.
PATTERN selector
switch
S2
REV
Causes reversal pattern to be
generated (alternate Mark and
Space).
STEADY:
M
Causes a continuous Mark output signal to be generated.
S
Causes a continuous Space output signal to be generated.
SELECTED
CHARACTERS CODE LEVEL:
5, 6, 7, and 8
Establishes 5-, 6-, 7-, or 8level code format for characters
preset by SELECTED CHARACTERS
pushbutton switches.
FOX MSG: 5,
and 8
Selects programed FOX message
to be generated in 5-level code
(baudot) or 8-level code (ASCII).
RAND
Selects random bit pattern (internally strapped for 511-bit or
2047-bit format) to be generated.
Page 9
TABLE II (Cont ‘d)
NAME AND TYPE
REF DES
CONTROL
POSITION
FUNCTION
DISTORTION
switches:
PERCENT
(dual-concentric
switches)
TYPE
S5
S7
0 through
40
(inner knob,
red markings)
Selects increment of distortion,
in steps of 10%, up to 40%.
Add to 1% settings below to produce total distortion generated.
0 through 9
(outer knob,
black markings)
Selects increments of distortion,
in steps of 1%, up to 9%. Added
to 10% (incremental) setting
above to produce total distortion
generated.
OFF
In this position, no distortion is
introduced on signal output.
BIAS:
M
Selects Marking bias distortion.
S
Selects Spacing bias distortion.
SW
Selects switched bias distortion
(on a character basis).
END:
M
(applicable
to start-stop
mode only)
Selects Marking end distortion.
Selects Spacing end distortion.
(applicable
to start-stop
mode only)
Page 10
TABLE II (Cont ‘d)
NAME AND TYPE
REF DES
BIT RATE dualconcentric
switch
S1
411S1)
CONTROL
POSITION
A/B range selector (inner knob,
red markings).
FUNCTION
Selects upper (A) or lower (B)
scales of bit-rate dial.
Frequency selec- Selects rate of data output
signal (in bits per second).
or (outer knob)
MODE switches:
(left switch)
3
FREE RUN
Selected output signal pattern
is generated repetitively at
selected internal bit rate.
EXTERNAL:
External step signal is applied
to rear-panel STEP IN connector.
CHAR. STEP
(applicable to
start-stop
mode only)
Each character of the selected
signal pattern is generated
(stepped) by each externally
applied step pulse signal.
SEQ STEP
(applicable to
start-stop
mode only)
One complete selected pattern
sequence is generated (once) by
each externally applied step
signal.
BIT SYNC
(applicable to
synchronous
mode only)
Pattern Generator operates at the
externally applied bit timing
signal rate. Distortion cannot be
introduced on the output pattern.
MAN STEP:
CHAR
(applicable to
start-stop
mode only)
In conjunction with associated
RELEASE pushbutton switch,
causes one character at a time to
be generated with each actuation
Page 11
TABLE II (Cont’ d)
NAME AND TYPE
REF DES
CONTROL
POSITION
SEQ
(applicable to
start-stop
mode only)
RELEASE pushbutton switch
S4
(Right switch)
S6
-------
FUNCTION
In conjunction with associated
RELEASE pushbutton switch,
causes one entire character
pattern sequence to be generated
with each actuation of the
RELEASE pushbutton.
Provides for manual stepping of
output characters and sequences.
S TART/S TOP
UNIT STOP
MARK:
1.0
Stop-Mark duration = 1.0 bit
unit.
1.5
Stop-Mark duration = 1.5 bit
units.
2.0
Stop-Mark duration = 2.0 bit
units.
SYNC
Output data is generated in
synchronous form (a continuous
data stream without start-Spaces
and stop-Marks).
OUTPUTS (switch,
indicator, and
connectors):
HI-LEVEL
SELECT switch
Page 12
S9
NEUT
Sets conditions for keying neutral
loop signal (up to 230 volts at
60ma, max) at HI-LEVEL output
phone jack and rear-panel term i n a l s . (Battery and loop resistor
externally supplied.)
TABLE II (Cont‘d)
NAME AND TYPE
REF DES
CONTROL
POSITION
FUNCTION
POLAR
Sets conditions for keying polar
loop (±130 volts at 20 to 30ma)
at HI-LEVEL output phone jack
and rear-panel terminals.
(Battery and loop resistor
externally supplied.)
HUB
Sets conditions keying a HUB
circuit (+60-volt Mark to - 30 volt Space) at HI-LEVEL output
phone jack and rear-panel terminals. (Battery externally
supplied.)
DS1
------
Lights when a Mark is being
generated.
SIG
TP1
SIG
Low-level (±6 volts) output signal terminal.
GND
TP2
GND
Low-level output signal ground
terminal.
HI-LEVEL
phone jack
J1
------
Provides signal output connection for high-level (loop) output
signals.
Unmarked 12pin cable
connector
J2
------
Provides signal output connections for interfacing via Data Set
Adapter to other equipment.
S8
------
Controls application of ac line
power to unit,
SIG indicator
lamp, clear
LOW LEVEL
output terminals:
POWER/OFF
illuminated
rocker switch
Page 13
TABLE III
REAR-PANEL CONTROLS AND TERMINALS
NAME AND TYPE
REF DES
CONTROL
POSITION
FUNCTION
(Two 7-terminal
barrier strips)
A12TB1,
A12TB2
-----
Provides duplicate connections
for front -panel, low-level out put terminals and high-level
output jack. Also provides for
connection of external loop
batteries and external stepping
signal input.
1/4 AMP SLO BLO
fuse
A12F1
-----
AC power line fuse. (DC power
supply fuses located internally
on Assembly A2.)
EXT CLK coaxial
connector
A12J2
-----
BNC-type connector for applying external bit-rate timing
signal.
Unmarked re cessed male
cable connector
A12J1
-----
Twist-lock connector for detachable ac power cord.
CR/LF switch
A12S1
AUTO
Sets conditions for automatic
generation of a carriage-return
and line-feed signal after 72
characters in 5-level and 8level modes.
(A12S1)
OUT
Disables automatic generation
of carriage-return and linefeed signal.
(E)
Installation
Physical and Mechanical Considerations
1.17 The Pattern Generator may be installed and used in two different ways:
(a) A S a piece of portable test equipment enclosed in an optional c a r r y i n g c a s e
utilizing a removable cover having cable storage provisions.
(b) In a semi-premanent rack or cabinet installation wherein the unit is mounted and
wired in a way that precludes frequent changes of location.
Page 14
1.18 The over-all dimensions of the basic unit are shown in Fig. 6 along with the
dimensions of the carrying case for portable use. When used in standard 19inch rack -mount installations, the required 19-inch width is obtained by two brackets
which fasten to the sides of the unit. In the portable configuration, the Pattern
Generator will normally be carried to the point of use and set up on a bench or table.
Since this type of installation will usually be temporary, the usual handling practices
and precautions taken with quality portable test equipment in field use will generally
suffice.
1.19 When the Pattern Generator is to be rack- or cabinet-mounted, the unit should be
installed at a working height that enables convenient access to paneI controls
and markings. Avoid locating the unit above or near equipments generating large amounts
of heat. Consideration should also be made in planning the Iocation and routing of
connecting wiring and cables to prevent undesirable interaction with other equipment.
Electrical
Connections
1.20 Installation or application of the Pattern Generator in a given situation will require wiring connections to be made to and from the terminals and connectors on
the front and rear panels of the unit. In addition, a particular application may require
that certain internal wiring (strapping) connections be made or changed. Several of the
printed-circuit assemblies of this unit contain strapping terminals for these alternate
circuit configurations to satisfy the requirements of different system applications and
u s e s . For instance, the selection of odd or even parity-bit generation (or no paritybit) is made by a strapping connection on PC-card A8. Instructions for these various
strapping options are given in 1.24 below.
External Wiring Connections
1.21 The output terminals for both the high-level and low-level signals located on
the front panel are duplicated at a terminal board on the rear panel of the unit.
Choice of which output terminals to use in a given situation will be governed by the
individual circumstances of each installation or use. When the pattern Generator is
used in high-level telegraph circuits, the required loop battery connections are made at
the rear-panel terminal boards. External timing signals and external character stepping
signals, when used, are also applied via rear-panel connections.
1.22 Wiring connections for hub operation and the various modes of high-level loop
operation are shown in Fig. 7 through 13. Polarities shown should be carefully
o b s e r v e d . The Pattern Generator provides only dry-contact closures for the high-level
output circuits: therefore, the user of this equipment must ensure that adequate currentlimiting resistance is present in the external loop circuit. For this reason, a representative variable resistance symbol is shown connected in series with the loop supply in
these illustrations. The resistance value will be determined by the individual loop requirements and, thus, no specific ohmic values are given.
Page 15
Page 16
Fig. 6
1.23 The high-level output circuits of the Pattern Generator contain full-wave bridge
diode configurations which minimize the danger of damage or destruction of
Pattern Generator circuit components beta use of incorrect polarity connection of external
l o o p s u p p l i e s . However, the polarity of the output signal (positive Mark or negative
Mark) is affected by the polarity of the loop battery connection. The polarity symbols
in Fig. 7 through 13 indicate the relative polarity of the output signal for the various
l o o p b a t t e r y c o n n e c t i o n s . Reversing the battery polarity will reverse the relative polarities of the Space and Mark output signals.
Internal Strapping Options
1.24
(a)
The following Pattern Generator PC-cards contain s t r a p p i n g t e r m i n a l s :
PC -card A1 - - T i m e - b a s e a n d o s c i l l a t o r c i r c u i t s .
(b) PC-card A3 - - D a t a o u t p u t c i r c u i t s .
(c)
PC-card A4 - - M e s s a g e c o n t r o l c i r c u i t s .
(d) PC-card A7 - - C h a r a c t e r d i s t r i b u t o r a n d t i m i n g c o n t r o l .
(e) PC-card A8 -- Signal pattern matrix.
Instructions for making strapping connections are given in the next five para graphs in the same order as listed above. The location of the numbered wiring
terminals on each card is illustrated in Fig. 14.
1.25
Fig. 7 - High-Level Neutral Operation, Positive Tip, Using Front-Panel Phone
Jack for Connection to Loop or Equipment
Page 17
Fig. 8 - High-Level Neutral Operation, Positive Tip, Using Rear-Panel Terminals
for Connection to Loop or Equipment
Fig. 9 - High-Level Polar Operation (Positive-Mark), Using Front-Panel Phone Jack
for Connection to Loop or Equipment
Page 18
Fig .
10 - High-Level Polar Operation (Positive-Mark), Using Rear-Panel Terminals
for Connection to Loop or Equipment
Fig. 11 - Front-Panel Loop Connection, Neutral Operation, for Loop Supply
Integral with External Circuit
Page 19
Fig. 12 - Rear-Panel Loop Connection, Neutral Operation, for Loop Supply
Integral with External Circuit
Fig. 13 - External Connections, Hub Operation
Page 20
(a) The strapping on PC-card A1, Time- Base and Oscillator Circuits, affects the
bit-rate selections of the B range of the dual-range time base. The strapping
connections provide a choice of three frequency division rates (32, 16, and 1) for
the six B-range crystals (see Fig. 2). Each of the six crystals may be connected
for any one of the division factors of 32, 16, or 1. In selecting crystals to obtain
s p e c i f i c b i t r a t e s , the desired bit rate must be multipled by 200 times 32, 16, or
1 to arrive at the crystal frequency. (The output frequency of the time-base circuit
is 200 times the bit rate.) The strapping is as follows:
DIVISION
RATES
STRAPPING
CONNECTION:
Y1
32
16
1
4to3
4to2
4to1
Y4
32
16
1
8to7
8to6
8to5
Y2
32
16
1
Ato3
Ato2
Ato1
Y5
32
16
1
12 to 11
12 to 10
12 to 9
Y3
32
16
1
Bto7
Bto6
Bto5
Y6
32
16
1
Cto11
C to 10
Cto9
CRYSTAL
CRYSTAL
DIVISION
RATES
STRAPPING
CONNECTIONS
(b) The strapping on PC-card A3, Data Output Circuits, establishes the Mark
polarity of the low-level output signal. Make strap connections as follows:
LOW-LEVEL MARK POLARITY
CONNECTION REQUIRED
Positive (+6 volts)
strap 2 to 5
Negative (-6 volts)
strap 1 to 5
N o t e : Terminals 1, 2, 3, and 4 for high-level polarity are pre-strapped at the
factory as follows: 1 to 4 and 2 to 3. These connections do not require changi n g . Polarity changes for the high-level output signals may be accomplished by
reversing the loop battery connections.
(c) Stropping on PC-card A4, Message Control Circuits, establishes the triggering
polarity of the external character-stepping signal and adjusts the input circuit
to accommodate a hi-polar (±6 volt) or single-ended positive (0 to +6 volts)
stepping signal.
Page 21
Fig. 14 - PC-Card Strapping Terminal Locations
Page 22
STEPPING SIGNAL
CHARACTERISTICS
FUNCTION
CONTROLLED
Triggering Polarity
Positive-going
Strap 5 to 6
transition
transition
Strap 7 to 6
Bi-polar (±6-volts; 0-volt
threshold)
Strap 1 to 2
Single-ended positive (0 to
+6 volts; 0.7-volt threshold)
No strap (open circuit
between 1 and 2)
Negative-going
Signal T y p e
CONNECTIONS REQUIRED
(d) Strapping on PC-card A7, Character Distributor and Timing Control, establishes
the conditions for generation of any of three random pattern signals: a 511 bit
common pattern, a 511 bit CCITT standard pattern, and a 2047-bit pattern (RAND
setting of PATTERN switch). M a k e s t r a p c o n n e c t i o n s a s f o l l o w s :
RANDOM
BIT PATTERN
511 bit
Common
Pattern
CONNECTIONS
REQUIRED
CONNECTIONS
REQUIRED
1-2 and 5-6
2 - 3 and 5-6
511 bit
RANDOM
BIT PATTERN
2047-bit
1-2 and 4-5
Pattern
(e) PC-Card A8, Signal Pattern Matrix. The strapping on this PC-card establishes
the mode of parity-bit generation when the Pattern Generator is generating the
8-bit ASCII code. The three “choices available are odd parity, even parity, or no
p a r i t y b i t . In the latter case, the bit position will always contain a Mark. Make
strap connections as follows:
PARITY MODE
CONNECTION REQUIRED
Odd
Strap 1 to 3
Even
Strap 1 to 4
None
Strap 1 to 2
Page 23
Power Connections
1.26 The ac power cord of the Pattern Generator is a detachable item that is stored in
the hinged cover of the portable unit during storage or while the unit is in transit.
The only power connection required in setting up the Pattern Generator for use is the
attachment of this ac power cord to the rear-panel connector on the unit and to the ac
power source outlet. Connection of external loop batteries is covered in 1.20 through
1.23. Before making power connections for the first time, the input strapping connections should be checked, and changed if necessary, to match the source power at the
point of use. The strapping connections provide for wiring the primary input circuit for
a 115-volt or 230-volt ac power source. The strapping terminals are accessed by removing the bottom access plate (see Fig. 2). The four numbered terminals are strapped
as follows:
INPUT VOLTAGE
115 volts
STRAP CONNECTIONS
Strap terminal 1 to 3
Strap terminal 2 to 4
230 volts
Strap terminal 2 to 3
Initial Adjustments
1.27 The Pattern Generator requires no adjustments at the time of installation to effect
normal operation. The only adjustments in the unit are the power supply voltage
adjustments on PC-card A2; these are factory-adjusted and should not require readjustment unless component repairs and replacements have been made in the power supply
c i r c u i t r y . Procedures for power supply adjustments are contained in Maintenance
Section 4 of this manual.
2.
OPERATION
(A)
Circuit Connections
2.01 Connections between the Pattern Generator and the equipment or system under
test will generally vary from one application to another. No one fixed procedure or setup will apply to all cases . The Pattern Generator contains the built-in
flexibility to accommodate a relatively wide range of functional applications; this variety
variety is made available via the provisions for external input and control signaIs as
well as the internal strapping options. The details for making the required connections
and strapping are described in the previous section of this manual under (E) Installation.
Page 24
Generally, the procedure for making circuit connections prior to operating the equipment in a given situation will be as follows:
(a) Determine the mode of operation to be used.
to be high-level or low-level?
Principally, is the output signal
(b) Determine whether or not any of the internal strapping options require changing.
(c) Determine whether or not any external stepping sources or bit timing signals are
to be used (see Table II MODE switches, EXTERNAL). The external step signal
is applied to rear-panel STEP IN connector.
(d) When (a) through. (c) above are established, make the applicable connections
following the procedures and precautions described under (E) Installation in the
first section of this manual.
(B) Operating Procedures
2.02 Before operating the Pattern Generator, make certain that required connections
(ac power, loop, signal, etc.) have been properly made for the given application. Refer to 2.01 for explanatory details. After connections are made, turn on the
equipment and use the procedures outlined below as a guide in operating the Pattern
Generator.
Manipulation of Controls
2.03 Manipulate the Pattern Generator controls as follows:
(a) Select the output bit-rate by setting the appropriate combination of the dual BIT
RATE switches. Use the small, inner knob to select range A or B, then use the
large, outer knob to select the desired bit-rate.
(b) Select the desired output data pattern by positioning the PATTERN selector
switch. If one of the SELECTED CHARACTERS positions or one of the FOX MSG
positions is chosen, then the field of SELECTED CHARACTERS switches to the left of
the PATTERN switch must be programed as described in (c) below. For all other
positions of the PATTERN switch the settings of the SELECTED CHARACTERS pushbutton switches do not matter.
(c) If a selected character pattern or a FOX message is to be generated, program the
applicable bit positions of each vertical group of switches representing the six
programmable characters. The 6- character station identification code, which is part
of the complete FOX message, is programed by these switches. See Fig. 15 and 16
Page 25
Fig. 15 - Standard 5-Unit Start-Stop Teletypewriter Code
Page 26
for details of the Mark/Space patterns for both the Baudot and ASCII codes. To program a Mark, the applicable pushbutton should be depressed. Spaces will be generated for those positions where the pushbuttons are not depressed.
(d) Set the rear-panel CR/LF switch to AUTO or OUT to enable or inhibit the automatic generation of a carriage-return, line-feed sequence after generation of
72 characters (applicable to either 5-level or 8-level selected character codes
only).
(e) Select the length of the character sequence to be generated by depressing one
of the six CHARACTER SEQUENCE LENGTH pushbutton switches. Generally,
the stitch selected will be the same as the number of programed characters in the
field above, but any number may be selected. (For example, if six characters have
been programed and CHARACTER SEQUENCE LENGTH switch number 3 is depressed,
only the first three of the s lx selected characters will be generated. A steady
Mark will occupy the remaining character intervals.) These switches are functional only for the selected character’s positions of the PATTERN switch; they do
not affect the FOX message station identification code.
(f) Select the mode of character stepping by setting the left-hand MODE switch
to the desired position. In all positions except FREE RUN an external character stepping source is required (see Table II MODE switches, EXTERNAL) . The
external step signal is applied to rear-panel STEP IN connector. In the two MAN
STEP positions this external stepping is obtained manually by depressing the
RELEASE pushbutton switch. In FREE RUN the unit repeatedly generates the selected
output pattern without external triggering.
(g) Select the start-stop or-synchronous modes of code transmission by setting the
right-hand MODE switch to SYNC or to one of the three START/STOP settings,
as required. These latter three settings establish the length (duration) of the
stop-Mark bit.
(h) If distortion i S to be introduced on the output signal, set the DISTORTION
TYPE switch to select bias or end distortion. For zero distortion set this
switch to OFF. Select the amount of distortion by operating the dual-concentric
PERCENT control. The small, inner knob sets the amount in increments of ten.
The larger, outer knob sets the amount in unit increments. The two controls are
additive; i.e. , to obtain 15 per cent use settings of 10 and 5, respectively.
(i) If the Pattern Generator is being used on a high-level loop circuit, set the H I LEVEL SELECT switch to the position applicable to the type of loop circuit
used.
Page 27
Page 28
Figure 16
2.04 After the above control settings and manipulations have been made, the Pattern
Generator will be operational for the conditions established. Changes may be
made in most of the parameters of the output pattern while the unit is in operation.
For example, the PERCENT distortion and TYPE distortion control settings may be
changed at will.
3.
PRINCIPLES OF OPERATION
(A)
General
3.01 Pattern Generator operating principles are presented in two parts. The first part
describes the various functional sections of the unit, using an over-all block
diagram to depict interrelationships and main signal flow paths. The second part destribes the circuitry and logic of the unit on an assembly basis. With some minor exceptions, each of the PC-card assemblies is functionally self-contained, so that it
may be described separately in terms of the input and output signals that are processed.
Simplified logic and block diagrams present the essentials of circuit operation without
a point-to-point logic analysis.
(B)
Over-All
Functional
Description
3.02 Fig. 17 presents a block diagram of the Pattern Generator showing the functional
relationships between the major assemblies and the principal inter-assembly
control signals and data p a t h s . Power supply connections and the, numerous and complex switch control functions have been omitted for simplification. The signal interconnections shown in simplified form have been given functional titles to facilitate the
description.
3.03 The time-base circuit furnishes the stable clock signal from which the various
output data-bit rates and distortion-generating signals are derived. A crystal
oscillator circuit is used for the basic clock; the crystal oscillator feeds a binary
frequency-divider chain which provides the separate 100X clock signals for each data
r a t e . The output frequency from the time-base circuit is 100 times the selected databit rate. The start control signal turns the time base on and off in the stepped mode
of operation. In free-run operation, the time-base is always on.
3.04 The main purpose of the distortion generator circuits (PC-card A5) is to produce
data shift pulses which are controllable over a relatively wide range in time so
that known, adjustable amounts of distortion may be introduced on the output data patt e r n s . These circuits also furnish the “tree time” pulses for zero-distortion output
p a t t e r n s o r t r a n s i t i o n s . In all cases, the amount and type of distortion produced is
selectively pre-determined by the front-panel control settings. A secondary purpose
of the distortion circuits is to provide the unit with various clocking pulses (related
always to the duration of the selected data-bit rate) which are used to effect
s w i t c h i n g , s a m p l i n g , r e s e t , a n d data-transfer functions within the Pattern Generator
logic . The start control input to the distortion circuits is used to enable resetting of
t h e d i s t o r t i o n c o u n t i n g c i r c u i t s . The data sense input is derived from the input to the
Page 29
Page 30
Fig. 17
last stage of
in this stage
tortion shift
are used in
the data register; its purpose is to sense the presence of a Mark or Space
and thus signal the distortion circuit to produce a distortion or no-dis pulse. The data-transfer signals include timing and gating pulses which
the synchronizing of data-transfer.
3.05 The character distributor (PC-card A7) contains a 10-stage shift register which
performs a parallel-to-serial conversion of the message pattern data supplied
from the signal pattern matrix. The last (eleventh) stage of the data register is located
on PC-card A3; for this reason, the shift-pulse signal is shown applied to both A7 and
A3. As character data-bits (in parallel form) are loaded into the register, they are
shifted out serially to the output circuits on A3. For the random pattern and reversal
pattern outputs, this parallel-to-serial operation is not used. These patterns are generated in serial form by the internal logic of the unit and applied to the serial input terminal of the shift register modules, whereupon it is directly clocked out. (This latter
circuitry is not shown on this simplified block.) The data-enter signal is a timing
pulse derived from gating circuits connected to the data register. This signal o c c u r s
each time the register has been emptied and is ready to receive the next character from
the matrix. In the SELECTED CHARACTERS mode of operation, the data-enter signal is
routed to circuitry on PC-card A4 to advance the character counter/sequencer, thereby
causing the next character to be loaded into the data register. When the FOX message
is being-generated, the data-enter signal, applied to A6, advances the F O X m e s s a g e
character counter/sequencer to load the next FOX character into the data register. The
character end signal applied to A7 is derived from gating circuits on A4. This signal,
occurring at the end of each character or sequence, when the unit is being operated in
the manual step or external step modes, halts further output until the next step pulse’
i s a p p l i e d . In the free-run mode, the step pulse is generated automatically by the
internal circuit logic; in the manual step mode, whenever the front-panel pushbutton is
depressed; and, in the external step mode, by an external step signal.
3.06 The message control assembly (A4) contains miscellaneous circuitry which generates various control and timing signals required to effect the orderly sequencing and processing of the selected output patterns. The data-enter input from PC-card
A7, occurring whenever the data register is empty and ready to receive the next character, generates the message control signal that is shown applied to the pattern
matrix. This message control signal is an enable signal to the matrix that will allow a
new character to be fed to the data register. Concurrent with producing the message
control signal, the data-enter signal c a u s e s a character-counter circuit (four binary
counter stages) to advance one count. This new character count, in BCD form, is fed
to the pattern matrix. (This character-counter circuit pertains to the selected characters {switch matrix) only; the FOX circuits have a separate counter/sequencer.) A BCDto-decimal decoder on the pattern matrix assembly receives this count and correspondingly advances one decimal step (to the next matrix character), thereby generating a
signal pulse that causes the next selected character to be shifted into the data register.
The message control signal is also fed to the FOX message assembly (A6), where it
performs essentially the same function, in conjunction with the data-enter signal, as
for the selected characters described above. The reset input from the FOX message
assembly causes the message control signal to be reset at the completion of the FOX
message.
Page 31
3.07 The principal component of the signal pattern matrix PC-card (A8) is a multiinput diode/NOR-gate matrix. The purpose of this matrix is to provide a common input network to the data register for the various pre-programed character bit
sources such as the front-panel switch matrix and the FOX message assembly. The
matrix is driven by a group of NAND gates which are sequentially enabled by the character count and message control input signals. The first six gate positions are associated with the six selected characters programed via the front-panel switch matrix.
As these first six characters are gated, each gated output pulse is fed to the frontpanel selected character switch matrix, which develops the appropriate Mark/Space bit
pattern for each programed character. This bit-pattern (in parallel form) is then applied
to the data register via the NOR-gate matrix of PC-card A8. The output. data-bits of
the FOX message assembly are applied to the NOR-gate matrix and data register on the
same lines as the output of the switch matrix; however, these two signal patterns are
always generated separately, thereby permitting the sharing of a common input connection to the matrix.
3.08 The FOX message generator circuit features a monolithic read-only memory (ROM)
containing the pre-programed FOX message patterns for both the ASCII (8-level)
a n d b a u d o t ( 5 - l e v e l ) f o r m a t s . This assembly also contains its own sequencing counter,
stepped by the message control and data-enter input signals, for sequentially reading
the output of the ROM. As the ROM is sequentially read, the output data-bits are applied to the signal pattern matrix. A gating circuit on PC-card A6, connected to appropriate points in the sequencing counter, develops the reset signal to the message
control assembly when the predetermined count at the completion of the message has
been reached.
3.09 The data-output circuits (PC-card A3) consist basically of two separate output
circuits (high-level and low-level) driven simultaneously by the serial output of
the data register. The high-level circuit provides the capability for keying polar,
neutral, and Bell System Electronic Hub circuits at levels up to 130 volts. The lowlevel output produces a standard ±6-volt polar output per MIL-STD-188 or, by reversing
the polarity, for RS-232 signaling. Output terminals are located at both the front and
rear of the unit. Loop battery supplies for high-level operation must be externally
supplied.
3.10 The power supply circuits (PC-card A2 and A12) provide regulated outputs of
+ 1 5 , - 15, and +5 volts to power the electronics circuitry of the unit. Over-load
protection is provided by fuses in both the ac primary circuit and the individual dc output of each supply. The primary ac input circuit may be adjusted by strapping connections to operate from either a 115-volt or 230-volt source.
(c)
Logic and Circuit Descriptions
Logic Definitions
3.11 Generally, the logic symbols used throughout this manual conform to the definitions and rules established by Military Standard 806B. The descriptive logic
terms used in the text descriptions are defined as follows:
Page 32
(a) A logical-0 signal or level equals approximately 0 volt. This logic level may
also be referred to as being a “low. ”
(b) A logical-1 signal or level equals approximately +5 volts. This logic level may
also be referred to as being a “high.”
(c) Triggering of logic elements such as flip-flops and counters is accomplished by
negative-going transitions (+5 to 0 volts, or logical-1 to logical-0).
Time-Base PC-Cards A1 and A11
3.12
Logic and circuitry essentials of the time-base circuits are shown in Fig. 18.
The stable crystal oscillator circuit is located on a small subassembly PC-card
(A1A1) which connects to the main time-base PC-card. This circuit uses either the
s i n g l e A-range crystal (Y7) or one of six optional B-range crystals as the fundamental
f r e q u e n c y s o u r c e . The crystal oscillator output is applied to a frequency-dividing
binary counter chair having ten different output division rates. Nine of these division
rates follow the binary sequence from 1 to 256. The tenth division rate (for the bit
rate of 50.0) is a factor of 192, obtained by altering the normal counting sequence via
a f e e d b a c k c i r c u i t . These ten output frequencies are all applied, together with the output from the external timing source shaping amplifier, to a gate selection network.
This gating network contains one gate for each frequency; these gates are selectively
enabled by positioning the 11-position BIT RATE frequency selector.
3.13 The selected gated output of the binary divider is applied to one input of the
select A-range gate. This gate operates in conjunction with the B-range select
gate and the range selection portion of the BIT RATE switch to select the A or B ranges
of the time base. A ground input to either gate inhibits it and allows the other gate to
be enabled. The B-range outputs of the time base are obtained by gating the ÷32,
÷16, or ÷1 frequency-division rates in association with the first six positions of the
BIT RATE switch, which selects one of the six optional B-range crystals. The selected
A-range or B-range frequency is applied to a flip-flop output stage which provides a
further division factor of two. The output frequency from the time-base assembly is a
factor of 100 times the indicated setting of the BIT RATE switch.
3.14 The start control input signal (SC) functions as an on-off control of the time
b a s e . The output flip-flop is clamped in the set state when the input is a
logical-0 (SC), thereby preventing the flip-flop from being toggled by the input signal.
At the same time, the SC signal resets the frequency-division countdown chain. When
the start control signal is a logical-1 , the time-base circuit is enabled. In step mode
operation, the time base is turned off between successive generation of characters or
sequences.
Crystal Oscillator Circuit PC-Card A1A1
3.15 The time-base crystal oscillator is depicted in block form in Fig. 19. The common-base input stage serves as a constant-current reference source which is
applied to one side of the differential amplifier. In addition, this input stage serves
Page 33
Page 34
Fig. 18
Fig. 19 - Block Diagram - Crystal Oscillator Circuit, Subassembly A1A1
as the input load for the selected crystal. The function of the differential amplifier
configuration is to produce essentially uniform and reliable output Ievels over a wide
range of crystal frequencies. The reference level provides compensation for variations
in the outputs of the different crystals used.
3.16 Feedback is derived from the reference side of the differential amplifier and applied to the crystal via a 2-stage buffer consisting of cascaded emitterf o l l o w e r s ( D a r l i n g t o n c i r c u i t ) . This buffer effects an impedance-transformation to provide the required low source-impedance for driving the crystal. The output squaring
amplifier, fed from the signal side of the differential amplifier, produces a sharptransition output waveshape.
Distortion PC-Card A5
3.17 The distortion circuit (Fig. 20) furnishes the time-controllable shift pulses used
to clock the character bits out of the data register. Control of the time of shift
pulse occurrence provides the means for introducing distortion on the transitions of the
output signal. The input 100 X clock from the time-base, in association with two decade counters and BCD-to-decimal decoders, allows the data-bit to be divided into
uniform increments in steps of 1 per cent and 10 per cent of the data-hi} period. An
illustration of the data-bit period subdivision and its relevance to the distortion circuits is shown in Fig. 21. Two sample data-bits, encompassing three transitions, are
shown. The data-bit transitions are produced by the shift pulse applied to the data
register. These transitions, labeled A, B, and C, are shown on the first and second
l i n e . Between the transitions are the 10 per cent and 1 per cent subdivisions. Note
that a complete span of 100 per cent extends from A to B and from B to C.
3.18 Taking transition B as an example, note that with respect to the direction of the
time scale, shift pulses occurring to the left are early and those occurring to the
right are late. Similarly, there is a period designated early and late around each shift
p u l s e ( t r a n s i t i o n ) p o i n t . The maximum theoretical percentage that a given transition
Page 35
Page 36
Fig. 20
will vary is 50 per cent; the maximum practical setting of the Pattern Generator is 48
per cent. The decade counter, BCD-to-decimal decoder combination counts uniformly
from 1 to 100, then recycles and repeats the count as shown on line 3 of Fig. 21.
Each count from 1 to 100 corresponds to one discrete point on the distortion scale.
For instance, a count of 72 corresponds to an early shift pulse transition having 28 per
cent distortion. The “true-time” or zero distortion transitions coincide with the zero
count (reset) condition of the counter.
3.19 Referring again to Fig. 20, the outputs of the two BCD-to-decimal decoders,
providing the units and tens outputs for every discrete count from 1 to 100, are
applied to the various contacts of the dual-concentric BIT RATE switch. The wiper
contacts of these switches, grouped in two pairs by units and tens, for early and late,
are connected to a gating circuit controlled by the state of the distortion type control
flip-flop. The state of this flip-flop, in turn, is established by the setting of the frontpanel distortion TYPE switch. This entire early/late gating network is enabled or inhibited by the state of the distortion control flip-flop.
3.20 The distortion control flip-flop is the control element in the selection of “truetime” shift pulses or “distorted” (early or late) shift pulses. Depending on the
state, either the “true-time” shift pulse gating network will be enabled and the “distorted” shift pulse g a t i n g network will be inhibited, or vice versa. Thus, only one
“type” of shift pulse will be gated through at any one time to appear at the output as
SR. The “true-time” pulses are derived by a gating network (not shown) connected to
the zero (0%, 100%) outputs of the BCD-to-decimal decoders. The selection of “true
time” versus distortion is determined by sampling the state of the next-to-last stage of
the data register for a Mark or a Space. Since, by definition, the direction of the
transition (Mark-to-Space or Space-to-Mark) establishes the classification (bias or
end) of the distortion, sampling of this stage is necessary to provide the information
needed to select a distorted or undistorted shift pulse. For example, if Marking bias
distortion has been chosen, the shift pulse for all Space-to-Mark transitions must be
made to occur early by the selected percentage. Thus, when a Mark condition is
sampled in the next-to-last stage of the data register, the subsequent data transition
will be initiated by an early shift pulse so that the transition from Space to Mark will be
“ d i s t o r t e d . ” Note that the data sampling logic level is applied to the distortion control
flip-flop J-K inputs at opposite logic levels by inverting the input to the J terminal. In
this way the flip-flop is enabled for a change of state by the EE toggle pulse. The
toggling pulse for this flip-flop occurs at “EE” time; this is at the center of the data-bit
(corresponding to a count of 50).
3.21 When an external source is used to clock the output data from the Pattern
Generator, this stepping signal is routed to the output of this assembly via a
NAND-gate enabled by the setting of the MODE switch to the EXTERNAL-BIT SYNC position. At the same time, both the “true time” and the “time displaced” gating networks
are inhibited by a logical-0 derived from this same MODE switch setting.
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Page 38
Fig. 21
Data Register PC-Card A7
3.22 The Pattern Generator data register contains a total of 11 stages to encompass
the maximum bit-length signal pattern generated; this maximum-length signal
would be an 8-bit start-stop code having a 2.0 unit stop-Mark. Ten of the stages are
contained on PC-card A7 (see Fig. 22); the eleventh stage is located on PC-card A3
(Fig. 26). Input data from the pattern matrix, some of which are routed via the PATTERN
switch, are parallel-loaded into the register by the read pulse which is generated when
the previous content of the register has been shifted out, The number of active databits that are applied to the register depends on the format of the selected pattern. In
the case of a 5-unit start-stop code having a l-unit stop-Mark, the total number of
b i t s i s s e v e n . Data patterns are shifted out of the register by the SR signal originating
from the distortion circuit (PC-card A5), but routed via an inverter circuit on PC-card
A3 .
3.23 Loading of the register is accomplished by a read pulse which gates each character into the register in parallel form. This read pulse is derived from the
data-enter signal and a clock pulse (J output) from the units decoder of the distortion
c i r c u i t . The data-enter (DE) signal is generated when every stage of the register is in
the Space condition; that is, when the last Mark (the stop-Mark) of a start-stop character has been shifted out of the register, the register is empty and is ready to receive
the next character from the pattern matrix. Thus, the “all Space” condition, detected
by a gating network which senses each stage of the register, enables a change of state
of the data-enter control flip-flop when the D clock pulse from the distortion circuit is
a p p l i e d . It should be noted that the D clock which toggles the flip-flop occurs a short
time before the J clock which provides the read pulse. As soon as a new character is
in the register, the “all Space” condition no longer exists and the enable input is removed. When the next D clock pulse arrives, the data-enter control flip-flop is reset,
since a fixed +5-volt enable is applied to the other input. This removes the dataenter signal.
3 . 2 4 T h e f o r e g o i n g s e q u e n c e o f e v e n t s , involving the loading of a new character into
the data register, takes place during the first half of the start-Space bit interval
of the new character. In this way, successive start-stop characters are generated with
no breaks for recycling and loading the register. The “last Mark” (LM) output signal is
developed when the last Mark of the start-stop character is in the final stage of the
register. This LM signal is applied to PC-card AS, where it is combined (gated) with
the EE clock pulse from the distortion counter to perform various timing and clocking
f u n c t i o n s ( s e e F i g . 2 0 ) . One of the uses of this combined LM and EE signal is to perform a reset function in the start-stop mode of operation when the stop-Mark duration
is a 1.5-bit interval. This LM o EE signal is used to develop the DCR1 (dc reset 1)
signal via a gating circuit on PC-card A7; this DCR1 signal is operative only in the
start-stop mode and, in time, it is coincident with the LM-EE signal. When the 1.5unit stop-Mark is being produced, a 2.0-unit stop-Mark is initially loaded into the
register (see Fig. 22). However, the distortion counter is reset in the middle of the
second of these two stop-Mark intervals by the DCR1 signal gated with the enable
level derived from the 1.5 position of the MODE switch (see Fig. 20). In other words,
Page 39
Page 40
Fig. 22
when the “last Mark” condition occurs, the reset signal is developed one-half a bit
interval later, thus cutting the second of the two stop-Marks in half. This reset
signal to the distortion counters is gated with the SC (start control) signal which, in
the case of start-stop operation, is an enabling logical-1 at this time. The SC signal
is explained in further detail in 3.27.
3.25 Synchronous operation is similar to start-stop in that the characters are
parallel-loaded and serially shifted out of the register, but there are no startSpaces or stop-Marks between the data information bits. Therefore, the last Mark and
all Space detection circuits operate in a different manner than for start-stop. In
synchronous operation, the “last Mark” detection gating is arranged to detect a Mark
in the next-to-last stage of the register, with all the remaining stages containing
S p a c e s . As previously described, start-stop operation detects the last-Mark in the
stage of the register. In synchronous operation, an extra Mark is loaded into the
last
register at the end of each group of data-bits; its purpose is to serve as an “indicator
Mark” to identify the end of each group of synchronous character bits. This “indicator
Mark” never gets out of the register to appear as an output bit as does the stop-Mark
i n a s t a r t - s t o p c h a r a c t e r . When this synchronous indicator Mark is in the next-tolast stage of the register, it signifies that the last bit of the synchronous character is
in the last stage of the register and is thus being transmitted. At this time, the remaining stages contain Spaces, and the conditions for detection of the end of the
synchronous character are satisfied; i.e., the indicator Mark is in the next-to-last
stage with the subsequent stages all Spaces. Upon detection of this condition, the
indicator Mark is reset to a Space, whereupon the next synchronous character is loaded
into the register, with a new indicator Mark following the last character bit. This detection and reloading process takes place in each case while the last bit of the
p r e v i o u s s y n c h r o n o u s c h a r a c t e r i s “ o n t h e l i n e ; ” i . e . , in the last stage of the shift
register.
3.26 In the random pattern and reversals modes of operation, the data register is not
loaded and emptied as described above. The random pattern is produced by a
closed feedback loop which operates through an exclusive-OR gating circuit into the
serial input terminal of the first shift register module (IC9) . For reversals patterns,
the SR output of the distortion circuit is propagated directly through the second half
of the register by feeding back a sample of this signal, via the functional switching
of the PATTERN switch, to the serial input terminal of the second shift register module
(IC10).
3.27 The start control flip-flop contained on this assembly functions as an “on-off”
switch in the character and sequence step modes of operation. In the free-run,
s y n c h r o n o u s , random, and reversals modes of operation, a direct set input is applied
w h i c h k e e p s t h e f l i p - f l o p s e t . In the set state, the SC and SC outputs are applied as
enabling signals to the distortion circuit (A5) and the time base circuit (A1), allowing
t h e s e c i r c u i t s t o p e r f o r m t h e i r n o r m a l f u n c t i o n s . In the step modes of operation, the
start control flip-flop is set by the “SC set” signal, either through actuating the frontpanel RELEASE switch or by applying a pulse from an external source to the rear-panel
STEP IN terminals. These stepping signals are routed via the MODE switch. When
Page 41
thus set, the Pattern Generator produces a single character or a single character
sequence output, depending on which has been selected. At the end of each single
character or single sequence generated, the character end (CE) signal, generated on
PC-card A4, toggles the start control flip-flop to the other state, thereby “turning off”
the unit. While in this “off,” the SC signal applied to A3 puts the last stage of the
data register in the Mark state, thereby producing a “steady Mark” output from the
Pattern Generator during the intervals between step pulses.
Signal Pattern Matrix PC-Card A8 (See Fig. 23.)
3.28 The circuitry on this assembly consists of three principal sections: the BCDto-decimal decoder, the character-sequencing 2-input NAND gates, and the
N O R - g a t e / d i o d e m a t r i x . The decoder translates the BCD output of the character
counter on A4 into a sequential decade count of from 1 to 10. The 2-input NAND-gates
are arranged into three main groups as follows: the first six gates are associated with
the six programmable characters selected by the front-panel switch matrix; the next five
gates (C7 through C 1 1 ) are used in generating the final characters of the 5-level
(baudot) FOX message; the third group consists of five gates (C7 through C11 again)
used in generating the ending of the 8-level (ASCII) FOX message. Finally, there is
the C12 (character 12) gate used only in the S-level (baudot) FOX message. As the
BCD input to the decoder is decoded, the sequential output applies activating signals
to gates 1 through 10. An enabling level for these gates is derived from the MC
(message control) signal from A4. It should be noted that the MC signal is used in the
control and transfer of data from the FOX message circuit on A6 and the selected character switch matrix, via the A8 pattern matrix circuit to the data register. The MC signal is explained in the next part of this section. The first six gates activated cause
the programed content of the selected characters switch matrix to be sequentially
parallel-shifted to the data register via the NOR-gate/diode matrix.
3.29 For a given FOX message format, only one group of the message ending gates
will be enabled. This selective enabling is accomplished by a gating network
in association with the PATTERN switch-derived baudot and ASCII signals and the M C
signal from A4. After the first six characters are enabled, the next five characters (in
the selected format) are sequentially produced. However, in this case, the outputs of
the C7-C11 gates feed the NOR-gate/diode matrix directly. Character 11 is obtained
from a separate gating circuit on A4 (connected to the character counter on that same
assembly), since a maximum of only ten outputs is available from the BCD-to-decimal
decoder. The character 12 signal is obtained in a similar way.
3.30 In the ASCII 8-level code format, the eigth bit position is designated as a
parity information bit. The Pattern Generator provides strapping connections
for establishing the mode of parity (odd or even) or for deleting the parity information
and substituting a constant Mark in this bit position. The eighth ASCII data-bit is
routed to the data register via a gating network controlled by the strapping connections.
Page 42
Fig. 23
Page 43
Message Control Circuits, PC-Card A4 (See Fig. 24.)
3.31 This assembly consists of various counting, gating, and flip-flop circuits used
in controlling and sequencing the selected output patterns. The selected
character-sequencing counter provides the counting sequence (up to 12) that sequentially activates the pattern matrix gates which, in turn, load the six front-panel programmable characters and the FOX message endings into the data register. The output
of this counter, in BCD form, is decoded by circuitry on A8 for the first 10 counts.
The remaining two counts, 11 and 12, are developed by the CHAR 11 and CHAR 12
gating circuits on A4. The message control flip-flop is the key control element of this
circuit . Operation of the circuit will first be described for the case of FOX message
g e n e r a t i o n . In one state of the flip-flop, the selected character sequencing counter is
activated and the selected character gate matrix is enabled; in the other state, the FOX
message 6-stage sequencing counter on A6 is activated. A data-enter clocking pulse
is applied to the flip-flop with each new character. The state assumed by the flip-flop
will be determined by the logic levels applied to the J and K inputs. At the end of the
ROM FOX message sequence, the JMC signal goes high and allows the next data-enter
signal to toggle the flip-flop, thus switching to the selected character-sequencing
counter on A4. At the end of the selected character portion of the FOX message, the
C12 signal (derived by gating selected points in the counter) goes high, allowing the
flip-flop to change state and reactivate the ROM counter on A6.
3.32 Operation of the circuit for the selected character patterns will now be described.
When either the 6- or 7-level selected character position of the PATTERN switch
is being used, the message control flip-flop remains in the set state via a direct set
i n p u t . For the 5- or 8-level code patterns, the message control flip-flop is left free to
be toggled for the purpose of switching to the ROM to generate a carriage-return/linefeed signal after 72 characters have been generated. In selected character operation,
the sequencing counter is reset by the C6 signal from gate G-1 instead of the transition
being derived from the change of state of the message control flip-flop. Since there is
a maximum of six programmable selected characters, the counting sequence needs to
extend only to six instead of twelve. Gate G-1 is disabled in either of the two FOX
message positions of the PATTERN switch. Thus, the counter is reset every six characters only in selected character operation.
3.33
The C6 signal, which resets the sequencing counter, also steps the 72-character counter. This counter is used in the generation of an automatic carriagereturn/Iine-feed signal after each sequence of 72 characters has been generated (in 5 or 8-level code patterns only). The counter, normally a 16-count configuration, is
arranged to count to 12 (signifying 72 characters, since the C6 input pulse occurs
every six characters) by connecting the inputs to gate G-3 to those points of the
counter that will activate the gate at the count of twelve. When gate G-3 is
activated, it generates the equivalent of a Cl 2 signal, thus causing the message control flip-flop to change state and thereby activate the ROM FOX message circuitry on
A6. The pre-programed carriage-return/line-feed (CR/LF) sequence is contained in
the initial portion of the ROM. This automatic CR/LF feature is optionally enabled or
disabled by the rear-panel CR/LF switch which controls gate G-3.
Page 44
Fig.24
Page 45
3.34 The selected character control flip-flop, operating independently of the other
circuitry on this assembly, is used in conjunction with the front-panel
CHARACTER SEQUENCE LENGTH switches to control the number of selected characters
generated in each message sequence. The output of this flip-flop controls the gating
of the output of the data register. When the flip-flop is in the set state, the character control gate (located on A3) is enabled and the output of the register is gated
through to the output circuits, For all patterns except selected characters, a direct
set input keeps the flip-flop in the set state. When this flip-flop is reset, the gate is
disabled and the output signal becomes a steady Mark. Thus, if the number 3 CHARACTER SEQUENCE LENGTH switch has been depressed, only the first three of the six
programmable selected characters will be generated. At the end of the third character,
a reset enable signal, derived from the character sequencer (on A8) and routed via the
number 3 CHARACTER SEQUENCE LENGTH switch, will reset the selected character
c o n t r o l f l i p - f l o p . The flip-flop will remain in this state, producing a steady Mark output signal for the three remaining character intervals, until it is returned to the set
state by recurrence of the character 1 enabling input at the time the sequencing counter
i s r e s e t . The LM EE clocking pulse to the flip-flop is developed during each character
EE transicycle when the last Mark is in the last stage of the data register. This LM
tion occurs at the center (50% point) of the last Mark bit.
●
3.35 The character end gating complex contains three multi-input gating circuits that
function to generate the character end (CE) signal when the unit is operated in
the external step or manual step modes. This character end signal, when generated, is
applied as a toggle input to the start-control flip-flop to cause this flip-flop to “turn
off” the unit. Whenever a single character or a sequence of characters has been generated in the step mode of operation, the CE signal resets the start-control flip-flop,
which, in turn, causes the unit to emit a steady Mark output until the next step pulse
initiates another character or sequence cycle.
FOX Message Generator Circuits, PC-Card A6
3.36 The heart of the FOX message generator circuits (see Fig. 25) is a read-only
memory device (ROM) consisting of a single MSI integrated-circuit module. This
single device contains the bulk of the FOX message in both the 5-level and 8-level code
f o r m a t s . Only the last two groups of characters, the 6-character station identification
code and the word TEST, originate outside the ROM. These last portions of the FOX
message are derived from the SELECTED CHARACTERS switches and from separate gated,
sections of the pattern matrix assembly (see 3.27). The ROM is read, character-bycharacter, by applying a progressive binary count (up to 63) to six counter input term i n a l s . The output is taken from eight terminals for the ASCII format and from the first
five terminals in the case of the baudot (5-level) format.
3.37 The 6-stage sequencing counter consists of six flip-flop circuits connected in a
s t r a i g h t f o r w a r d b i n a r y c o u n t e r c o n f i g u r a t i o n . This counter is enabled when the
MC signal applied to gate G-2 from the message control flip-flop on A4 is high (logical1). At this time, the selected character counter on that same assembly is inhibited by
the logical-0 state of the MC output. Thus only one of these two sequencing counters
is operative at a time, as established by the state of the message control flip-flop. The
Page 46
Fig. 25
Page 47
MC levels applied to the counter serve also to reset the count to zero at the beginning
of a new message. With gate G-2 enabled by the high MC signal, the data-enter
signal is gated and inverted to clock the counter. A logical-1 level at the output of
gate G-1 is necessary to enable the counter to be stepped. This enable input from
gate G-1 is applied whenever the PATTERN switch is set to either of the FOX positions
or to the 5-level or 8-level selected character positions. This circuitry is enabled
for the 5-level and 8-level selected character positions of the PATTERN switch so that
the carriage-return/line-feed characters may be generated after each cycle of 72 chara c t e r s . It should be noted that the first four programed characters of the ROM contain
a carriage-return/line-feed sequence; in generating the automatic CR/LF after 72 characters in 5- and 8-level modes, this portion of the ROM is used, and then reset.
3.38 Concurrent with stepping the sequencing counter, a read pulse is developed for
the ROM. This read pulse gates the character bit pattern out of the ROM in
parallel form. The selection of 5-level or 8-level code format is made by the signal
applied to the ROM via gate G-3 and inverter I-3. A ground signal (logical-0) is applied to G-3 when the PATTERN switch is set to either the 8-level selected character
position or the 8-bit FOX message (ASCII) position. The resultant logical-0 applied to
the ROM causes the 8-bit output pattern to be generated. With a logical-1 (high) applied to this ROM input, the 5-bit output pattern (baudot) is generated.
3.39 The remaining circuitry on this assembly, gates G-4 through G-6, is used in
developing a reset signal to terminate the FOX message sequence. That is,
when the ROM content has been read, the enabling input levels (MC and MC) which
initiated operation are removed by changing the state of the message control flip-flop
on A4. Gate G-5 has 6 inputs, one from each stage, to detect the full-count state of
the counter. When the counter reaches this count at the end of the FOX message
sequence, an output transition is developed which is appIied as a reset to the message
c o n t r o l f l i p - f l o p . Similarly, gate G-6, with 3 inputs from the counter, causes this
same reset signal, but at a different count. This time the reset O C C U r S at the count of
4, when the carriage-return/line-feed portion of the ROM message content has been
g e n e r a t e d . This latter case applies only to the 5-level and 8-level selected character
positions of the PATTERN switch and only if the circuitry has been enabled by the rearpanel CR/LF switch (see Fig. 23) . Gate G-4 furnishes an enable input to gate G-6
when the PATTERN switch is set to either of these positions . Inverter I-5 develops a
logic signal for use as an input to gate G-1.
Data Output Circuits, PC-Card A3
3.40 A simplified block diagram of the Pattern Generator output circuits is shown in
Fig. 26. The output of the final stage of the data register is applied to one input of the character control gate. This gate is enabled or inhibited by the SCC signal
output of the selected character control flip-flop on A4 (see Fig. 24). Whenever the
gate is inhibited, the output level of the gate is a logical-1 (high); this produces a
Mark signal at the output terminals of the unit. For all operating patterns except
selected characters (5-level through 8-level), this gate is held in the enable condition
by keeping the flip-flop in the set condition. In selected character operation, the gate
receives an inhibit level at the completion of the programed number of selected characters (one through six) established by the front-panel CHARACTER SEQUENCE LENGTH
switches.
Page 48
Fig. 26
Page 49
3.41 The output of the character control gate is applied simultaneously to the highand the low-leveI output driver stages; in addition, the front-panel SIG indicat o r l a m p d r i v e r c i r c u i t i s a c t i v a t e d . The SIG indicator lamp illuminates when the output signal is a Mark. The high-level driver stage consists of a pair of complementary
transistors connected in a push-pull configuration driving the center-tapped primary of
transformer T1. The common return (the center-tap lead of T1) contains a unijunctionoscillator operated switching circuit which functions in a manner similar to a tone
coupler to transfer the dc data-bits to the output stage via the transformer, thus providing dc isolation. Each output stage contains high-voltage switching transistors
operating in an open-circuit/saturated condition, analogous to relay contacts. The
polarity of the secondary windings is arranged so that only one circuit is switched into
conduction at a time.
3.42 Loop batteries for high-level operation are connected to the output (relay) circuit through a full-wave diode bridge circuit on each side of the circuit. This
bridge circuit makes it unnecessary to label the loop battery connection points with
polarity signs (+ or -). T h u s , b a t t e r y c o n n e c t i o n i s s i m p l i f i e d a n d t h e p o s s i b i l i t y o f
damage or destruction to circuit parts, due to improperly connected loop batteries, is
e l i m i n a t e d . For example, when setting up operation for a positive Mark, the operator
or installer simply connects the Mark (M) terminal to the positive terminal of the loop
supply. The details of these connections, and the necessary precautions, are fully
explained under (E) Installation in Section 1 of this manual.
Power Supply Circuits, PC-Card A2
3.43 Operating voltages for the Pattern Generator circuits are obtained from three
separate, but interrelated, regulated power supplies furnishing outputs of +15
volts, -15 volts, and +5 volts. The essentials of these power supplies are depicted in
the functional block diagram of Fig. 27. One power transformer is used for the three
supplies; full-wave rectification, in conjunction with center-tapped secondary windings, is also used in all three cases. Rectifiers CR3 and CR4 are connected in opposite
polarity to the other rectifiers, as required to furnish a negative 15-volt output with
respect to ground. The Zener reference diode for the +15-volt supply is also used as
the reference source for the +5-volt supply. The remaining circuitry of these supplies
is conventional in configuration and in circuit details.
3.44 The 5-volt power supply employs a series-regulator circuit with a protective
over-voltage circuit connected across the output terminals. The 5-volt supply
is the operating power source for all the integrated-circuit modules. For this reason,
prevention of an over-voltage condition at the output of this supply is essential; an
over-voltage condition would probably result in the destruction of many of the
integrated-circuit modules in a small fraction of a second.
3.45 The over-voltage protection circuit functions in the following manner (see Fig. 28).
Under normaI operating conditions, Zener diode VR3 is back-biased (nonconducting), thereby keeping transistor Q9 in a cut-off state. The SCR (CR7) is thereby
a l s o n o n c o n d u c t i n g , since its gate electrode is at ground (0-volt) potential when Q9 is
n o n c o n d u c t i n g . A n y over-voltage condition of greater than 7.5 volts will cause Zener
Page 50
Fig. 27
Page 51
VR3 to break down and will thereby turn
on both Q9 and CR7 to full conduction.
The fully conducting SCR effectively
short-circuits the power supply and
blows dc fuse F3, which is located at
the input to the series-regulator stage.
This removes the supply from service.
The circuit operates automatically and
is self-resetting after the fuse is replaced and the fault condition remedied.
3.46 Each of the three supplies contains a series dc fuse for the
purpose of short-circuit protection. It
should be noted that a momentary short
circuit will not normally cause a fuse to
fail; the short-circuit condition must
be a sustained one in order to blow the
f u s e . In either case, full protection is
provided for all circuit components.
4.
(A)
F i g . 2 8 - Simplified Schematic Diagram Over-Voltage Protection Circuit
for +5-Volt Supply
MAINTENANCE
Required Test Equipment
4.01 The equipment listed in Table IV is required for maintenance of the Pattern
Generator. The Common Name column of the table gives the names by which the
test equipment will be called in the following maintenance procedures. TABLE IV
REQUIRED TEST EQUIPMENT
NAME
COMMON NAME
FUNCTION
Electronic Frequency
Counter, Hewlett-Packard
Model H-P, or equivalent
Counter
Measurement of time-base
frequencies and data rates.
.
Oscilloscope, Tetronix
Model 535A, or equivalent
Oscilloscope
Waveform observation and
measurement. Used also for
signal tracing.
Multimeter, Simpson
Model 260, or equivalent
Multimeter
General voltage and resistance
measurements.
Page 52
TABLE IV (Cont’ d)
NAME
FUNCTION
COMMON NAME
Data Measuring Set,
STELMA Model DMS-303A,
or equivalent
DMS-303A
Measurement of telegraph distortion.
Teletype Printer Units
(2 required: 5-level code
and 8-level code machines)
Teleprinter
Provide printed read-outs of
Pattern Generator output signals for verification of equipment accuracy.
(B)
Performance Tests
4.02 A thorough performance test of the Pattern Generator requires that the various
functional sections of the unit be tested and evaluated separately, since there
is no one combination of control settings and associated measuring equipment that will
provide a comprehensive test of the entire unit. Therefore, the performance testing
outlined below is designed to cover the total unit in a logical series of separate tests.
(See Fig. 29 through 57 at the end of this section for schematic, component location,
and wiring diagrams.) The order of testing is as follows:
(a) Bit rates.
(b) Patterns, excluding selected character and random.
Note: These tests will also verify the performance of the high-level and low-level
output circuits.
(c) Selected character patterns and code level modes.
(d)
Distortion.
(e) External stepping.
(f) Random pattern.
Bit-Rate Tests
4.03
(a)
Preset Pattern Generator controls as follows:
BIT RATE range selector to Range A.
(b)
DISTORTION switches to zero and OFF.
(c)
MODE switches to FREE RUN and SYNC.
(d)
PATTERN switch to REV.
Page 53
4.04 Proceed as follows:
(a) Using a frequency counter connected to the LOW LEVEL output terminals of the
Pattern Generator, measure the output frequency at each numbered setting of the
BIT RATE frequency selector (outer knob) . The frequency in bits per second indicated
by the counter should correspond to one-half the bit-rate marking at each setting of
the selector switch.
(b) Set BIT RATE frequency selector to the EXT position. Connect an external timing
source having appropriate characteristics (see to Table I) to the EXT CLK connector at the rear of the unit. The output bit-rate indicated on the counter should be
1/200th of the input timing frequency.
(c) If the six optional crystals have been installed for range B, set the BIT RATE
range selector to range B and repeat step (a) above for the first six positions of
the BIT RATE frequency selector switch.
Output Circuits and Pattern Tests
4.05 The following tests verify the performance of the Pattern Generator at all settings
of the PATTERN switch. Output signals are taken from both the high-level and
low-level output terminals, thus completely testing the output circuits.
Steady Mark Steady Space, and Reversals
4.06
Preset Pattern Generator controls as follows:
(a)
BIT RATE switch to Range A at 75 bits per second.
(b)
DISTORTION switches to zero and OFF.
(c)
MODE switches to FREE RUN and SYNC.
(d)
PATTERN switch to STEADY, M.
4.07
(a)
Proceed as follows:
(a) Turn on power and observe that SIG indicator lamp lights steadily (indicating
steady Mark signal).
Using voltmeter or dc oscilloscope, measure output at LOW LEVEL terminals.
Output should be a steady +6 volts if Pattern Generator has been strapped for
p o s i t i v e M a r k ( l o w - l e v e l ) . If strapped for negative Mark, output should be -6 volts.
(See. 1.24 for strapping information.)
(b)
(c) Set PATTERN switch to STEADY, S. The SIG indicator lamp should go out, and
the steady Space output voltage at the LOW LEVEL terminals should measure -6
volts if the unit is strapped for positive Mark, or +6 volts if strapped for negative
Mark.
Page 54
(d) Set PATTERN switch to REV and use an oscilloscope to verify presence of reversals signal at LOW LEVEL output terminals. The displayed signal should be a
square-wave pattern having a peak-to-peak amplitude of 12 volts (-6 to +6 volts)
at a rate of 75 bits per second.
FOX Message (5-level and 8-level)
4.08
Preset Pattern Generator controls as follows:
(a)
BIT RATE switches to Range A at 75 bits per second.
(b)
DISTORTION switches to zero and OFF.
(c)
MODE switches to FREE RUN and START/STOP, 1.0.
(d)
PATTERN switch to FOX MSG , 5.
4.09
Proceed as follows:
(a)
Connect an appropriate 5-level teleprinter unit to the high-level output terminals.
Be sure that the output loop circuit connection (polar or neutral) matches the input requirements of the teleprinter unit. (See 1.21 through 1.23 for information on
external connections.)
(b) Set front-panel HI-LEVEL SELECT switch to POLAR or NEUT, in accordance with
the connections made in step (a) above.
(c) Program the SELECTED CHARACTERS switches for any desired combination of
c h a r a c t e r s . Depress the correspondingly numbered CHARACTER SEQUENCE
LENGTH switch. (See Fig. 15 for 5-level code patterns.)
(d) Turn on power to units and observe that the FOX message format, including the
six programed characters, is repeatedly generated and printed.
(e) For 8-level FOX message, repeat the above procedure using an appropriate 8level teleprinter unit connected to the high-level output of the Pattern
Generator. (See Fig. 16 for 8-level code patterns when programing the S E L E C T E D
CHARACTERS switches.
Selected Characters (5-Level and 8-Level)
4.10 The performance test for the 5-level and 8-level selected character patterns is
essentially identical to the FOX message tests in 4.08 above. Preset the
Pattern Generator the same way except for the PATTERN switch, which is set to CODE
LEVEL 5 and CODE LEVEL 8 for the respective tests. Repeat the procedure of parag r a p h 4 . 0 9 . The CHARACTER SEQUENCE LENGTH selection function should be tested
by depressing the six numbered buttons sequentially and observing that the corresponding number of the six programed characters is repeatedly generated and printed.
Page 55
Selected Characters (6-Level and 7-Level)
4.11 To verify the performance of the Pattern Generator in the 6-level and 7-level
selected character positions of the PATTERN switch, the output pattern must be
v i e w e d o n a n o s c i l l o s c o p e . Preset the Pattern Generator controls as follows:
(a)
BIT RATE switches to Range A at 75 bits per second.
b)
DISTORTION switches to zero and OFF.
(c)
MODE switches to W STEP, CHAR and START/STOP, 1.0 UNIT STOP MARK.
(d)
PATTERN switch to SELECTED CHARACTERS, CODE LEVEL 6.
(e)
SELECTED CHARACTERS switches -- Program a Mark into all six bit positions of
all six characters. (Depress all switches.)
(f)
CHARACTER SEQUENCE LENGTH switches -- Depress number 6.
4.12
Proceed as follows:
(a)
Connect oscilloscope vertical input to LOW LEVEL output terminals of Pattern
Generator.
(b)
Connect external sweep trigger input of oscilloscope to TP7 of PC-card A7
(accessible at rear of unit). Set scope for external, positive sync.
Turn on equipment and step characters manually, using RELEASE pushbutton.
Each character displayed should show a full complement of Marks in the bit
pattern.
(c)
(d) Release all odd numbered switches, thus restoring them to Space condition, and
repeat step (c) above. Displayed patterns should indicate alternate Mark/Space
bit pattern having Marks in second, fourth, and sixth positions.
(e) Release all remaining switches and repeat step (c). Each displayed character
should contain a full complement of Spaces in each bit position.
(f) Set PATTERN SWITCH to the 7 position of SELECTED CHARACTERS, and repeat
above procedures for 7-level code.
Distortion
4.13 Distortion testing requires the use of a data measuring set (such as the STELMA
DMS-303A Analyzer) having distortion-measuring capabilities commensurate with
the Pattern Generator specifications. The indicated distortion settings of the Pattern
Generator front-panel controls are verified and measured by the data measuring set. Pre set the Pattern Generator controls as follows:
Page 56
(a)
BIT RATE switches to Range A at 75 bits per second.
(b)
PATTERN switch to SELECTED CHARACTERS, CODE LEVEL 5.
(c)
MODE switches to FREE RUN and START/STOP, 1.0 UNIT STOP MARK.
4.14
(a)
Proceed as follows:
Connect the DMS-303A Analyzer to the LOW LEVEL output terminals of the
Pattern Generator.
Set the DISTORTION - TYPE switch of the Pattern Generator to BIAS, M. Adjust
the controls of the DMS-303A for measurement of Marking bias on a low-level
start-stop signal.
(b)
Program the SELECTED CHARACTERS switches for character no. 1 to provide alternate Marks and Spaces. Depress CHARACTER SEQUENCE LENGTH switch
n o . 1.
(c)
(d)
Set both DISTORTION - PERCENT switches to O (zero) positions.
(e)
Turn on equipment and observe distortion indication on meter of DMS-303A.
Distortion should be zero.
(f)
Set the decade (small inner) knob of the Pattern Generator DISTORTION - PERCENT switches to the 10 position. The DMS-303A meter should now indicate
distortion of 10 per cent ±2 per cent.
(g) Set decade knob to remaining three positions (20, 30, and 40 per cent positions).
At each step, the DMS-303A meter should indicate the corresponding amounts of
distortion present on the output signal, ±2 per cent.
(h) Set the decade DISTORTION - PERCENT switch to 0 (zero). The DMS-303A
should indicate zero distortion again.
(i) Set the units (large outer) knob of the DISTORTION - PERCENT switch sequentially to each numbered position (up to 9). At each numbered position the
corresponding amount of distortion should be indicated on the DMS-303A meter,
±2.
per cent.
(j) Set the decade knob to 20 and repeat step (i) above. The distortion indication
on the DMS-303A meter should now be the sum of 20 plus the numbered units
setting, ±2 per cent.
(k) Measure the output distortion for all remaining positions of the DISTORTION TYPE switch (Spacing bias, switched bias, Marking end, and Spacing end).
Use same general procedure as outlined above for Marking bias.
Page 57
External Character Stepping
4.15 This function may be verified with the Pattern Generator setup for the 5- or 8level Selected Characters test (see 4.10) or the FOX message test (paragraph
4.08). The procedure is as follows:
(a) Connect external stepping source signal wires between STEP IN and GND input
terminals on rear-panel terminal board. (See Table I for electrical specifications
of stepping signals.) (See 1.25 for information on applicable strapping.)
(b) Set MODE switch to EXTERNAL, CHAR STEP or EXTERNAL, SEQ STEP.
(c) Turn on equipment. Selected output program should now be generated in step
with the externally applied signal.
Random Pattern Check
4.16 This test should be performed in conjunction with the associated DMS-303A
Analyzer, since this feature of the Pattern Generator was designed to be compatible with the bit-error measuring capabilities of the DMS-303A. (The 511-bit
random pattern output conforms to the standard established by CCITT.) Preset the
Pattern Generator controls as follows:
(a) PATTERN switch to RAND.
(b) DISTORTION switches to zero and OFF.
(c) BIT RATE switches to same rate as DMS-303A.
(d) MODE switches to FREE RUN and SYNC.
4.17 Set the DMS-303A controls in accordance with the instructions contained in the
a p p l i c a b l e m a n u a l . Connect the LOW LEVEL output of the Pattern Generator to
the INPUT SIG jack of the DMS-303A. Turn on equipment and proceed as follows:
(a) Press the PUSH TO SYNC switch on the DMS-303A Analyzer.
(b) Reset the DMS-303A display circuits by actuating the DISPLAY RESET switch to
the MAN position. The meter should indicate no bit errors, thereby verifying
that the two units are synchronized.
(c)
Troubleshooting and Fault Isolation
4.18 The information presented below is a suggested approach to analyzing
symptoms and isolating faults down to the assembly or circuit level.
proach is most valuable if performed in conjunction with a performance test,
each part of these tests generally pertains to specific functional circuits or
of the unit. A conventional troubleshooting table is not supplied because of
Page 58
trouble
This apbecause
assemblies
the usual
l i m i t a t i o n s o f t h i s a p p r o a c h , i . e . , the impracticality of making such a table comprehensive enough to cover all possible fault condition-s and resultant symptoms.
Instead, it will be assumed that the technician or engineer has accumulated enough
basic and detailed knowledge of this unit to permit him to analyze and locate troubles
through reasoning, using suitable measuring test equipment. Finally, it is assumed
that prior to undertaking trouble analysis the usual preliminary steps and measures
have been taken; these measures include visual inspection of the equipment to uncover
faults such as loose or broken assemblies, connectors, wiring, etc., and a check of
the primary input power and power supply voltages.
4.19 The power supply fuses and the power supply voltages should be checked
before disassembling the unit for further testing. Three of the fuses are
mounted on power supply PC-card A2. In addition, fuses are located in each leg of
the battery inputs of the high-level loop output circuit. If the equipment malfunction
has occurred during high-level output operation, these fuses (located on PC-card A3)
should be among the first things to check. To remove the power supply card, the two
knurled, captive, securing screws at the top must first be loosened. The procedure for
checking the power supply output voltages is covered in (E) Power Supply Adjustment
Procedures. If power supply voltages are normal, signal tracing and waveform
observation, using an oscilloscope, must be performed on the signal portions of the
unit.
4.20 Trouble analysis of the Pattern Generator must proceed in a logical order to
isolate the cause of faults by “process of elimination.” The different functional sections and assemblies of the unit, as described in the Principles of Operation portion of this manual, must be thought of both in terms of their individual
characteristics and in terms of how they interact and are, in numerous cases, mutually
i n t e r d e p e n d e n t . Thus, certain malfunctions may render the whole unit inoperative,
whereas other malfunctions may cause only one or more output patterns to be adversely
a f f e c t e d . As a guide for signal tracing and trouble analysis, a selected sampling of
waveform data is provided in the subsequent paragraphs. The information presented is
intended to serve as a starting point for checking the functioning of the various
a s s e m b l i e s a n d c i r c u i t s . The data represents the “norm” for a given set of conditions.
The following items merit emphasis:
(a) The waveforms were taken at the numbered test point terminals on the PC-cards.
For each waveform, a particular set of operating control settings of the Pattern
Generator is used; these control settings are specified and should be duplicated
when signal tracing with the oscilloscope.
( b ) W h e n s i g n a l t r a c i n g , it is suggested that the applicable PC-card schematic
diagrams be referred to frequently. Use of schematic diagrams will facilitate
signal tracing on a point-to-point basis when using test points other than the
e s t a b l i s h e d n u m b e r e d t e r m i n a l s . Such procedures will usually be needed to locate
defective circuit parts (such as I-C modules) and require a thorough understanding
of the many individual circuits that constitute the unit.
Page 59
4.21 Assembly A1: Unless otherwise indicated, waveform measurements are
obtained using the following Patterm Generator control settings:
PATTERN . . . . . . . . . . . . . . . . . REV
MODE . . . . . . . . . . . . . . . . . . . FREE RUN, SYNC
DISTORTION . . . . . . . . . . . . . .
zero, OFF
BIT RATE
75
. . .. . . . . . . . . . .
Oscilloscope set for triggered sweep; triggering source: A7-TP7
Page 60
4.22 Assembly A3: Control settings and oscilloscope settings same as for Assembly
A1, unless otherwise noted.
4.23 Assembly A4: Unless otherwise indicated, waveform measurements are
obtained with the Pattern Generator controls set as follows:
Page 61
4 . 2 4 A s s e m b l y A S : U n l e s s o t h e r w i s e i n d i c a t e d , waveform measurements are
obtained with the Pattern Generator controls set as follows:
Page 62
4.25 Assembly A6: Unless otherwise indicated, waveform measurements are
obtained with the Pattern Generator controls set as follows:
Page 63
4.26 Assembly A7: Unless otherwise indicated, waveform measurements are
obtained with the Pattern Generator controls set a s f o l l o w s :
Page 64
4 . 2 7 A s s e m b l y A 8 : Unless otherwise indicated, waveform measurements are
obtained with the Pattern Generator controls set as follows:
(D)
Repairs
4.28 Repairs and replacement of Pattern Generator components may be accomplished
using standard techniques and practices, including the precautionary measures
required when replacing transistors and integrated circuits. In most cases, component replacement will not necessitate recalibration or readjustment of the unit, assuming
an exact replacement part has been used. However, if any parts are replaced in the
power supply circuits of PC-card A2, the applicable adjustment procedures for these
circuits should be performed to restore these circuits to their factory-adjusted status.
(E)
Power SUPPLY Adjustment Procedures
4.29 Procedures are given below for the adjustment of power supply output voltages.
Because there is a degree of interdependence and interaction between the power
supply circuits, it is important that these adjustments be carried out in the order
given.
Note: The -15-volt supply voltage level is established at the factory by selection
of the appropriate resistance value for A2R15 after the +15-volt supply is adjusted.
Therefore, whenever the +15-volt supply is subsequently adjusted, the -15-volt
level should automatically be correct.
(a) +15-Volt Adjustment
(1) Remove rear cover from enclosure to expose PC-cards.
(2) Connect unit to ac line and turn on power.
(3) Connect negative lead of dc voltmeter to TP3 (ground) of PC-card A2; connect
positive lead to TP1 of AZ.
(4) Adjust trim-pot R6 (see Fig. 4) for an indication of exactly 15.0 volts on the
voltmeter.
(5) Verify the presence and accuracy of -15-volt supply output. Connect negative lead of meter to TP4 on PC-card A2 and positive lead to TP3. Meter
should indicate - 15-volt dc (±5 per cent).
(b) +5-Volt Adjustment
(1) Reconnect negative lead of voltmeter to TP3 and connect positive lead to
TP2.
(2) Adjust trim-pot R21 (see Fig. 4) for an indication of exactly 5.0 volts on the
voltmeter.
(3) Disconnect the voltmeter and replace the rear cover of the unit.
Page 66
Fig. 29
Page 67/68
Fig. 30 Component Locations - Time-Base Circuit, Assembly A1
Page 69
Page 70
fig. 31
Fig. 32 - Component Locations - Time-Base Oscillator, Subassembly A1A1
Page 71
Page 72
fig. 33
Fig. 34
Page 73/74
Fig. 35 - Component Locations - Power Supply Circuits, Assembly A2
Page 75
Fig. 36 - Schematic Diagram - Power Supply Primary Circuits, Assembly A12
Page 76
Fig. 37
Page 77/78
Fig. 38
Page 79/80
Fig. 39
Page 81/82
Fig. 40
Page 83/84
Fig. 41
Page 85/86
Fig. 42
Page 87/88
Fig. 43
Page 89/90
Fig. 44
Page 91/92
Fig. 45
Page 93/94
Fig. 46
Page 95/96
Fig. 47
Page 97/98
Fig. 48
Page 99/100
Fig. 49
Page 101/102
Fig. 50 - Component Locations - Harness Board, Assembly A10
Fig. 51 - Schematic/Wiring Diagram - Selected Character Switches
Page 103
Page 104
fig. 52
Fig. 53
Page 105/106
Fig. 54
Page 107/108
Fig. 55
Page 109/110
Fig. 56
Page 111/112
Fig. 57
Page 113/114
5.
PARTS LIST
(A) Introduction
5 . 0 1 A c o m p l e t e list of replaceable electronic parts for the PG-303A Pattern Generator
is presented in (B) below. Table VI consists of an equipment breakdown into
assemblies, subassemblies, and detailed parts; Table VII consists of an optional accessories breakdown; and Tables VIII through XXI consist of breakdowns of PC-cards
and assemblies into detailed parts. Table XXII cross references commercial part
numbers to National Stock Numbers.
(a) Within each table, parts are listed in alphanumeric order, by reference-designation symbol; for each entry, a brief description and the manufacturer part and
code number are provided. M a n u f a c t u r e r c o d e s a r e i d e n t i f i e d i n T a b l e V .
(b) To order
to the National
els. If the part
through normal
a part, note the part number and then cross reference that part number
Stock Number in Table XXII; then order through normal ordering channnumber does not have a National Stock Number, then order the part
ordering channels using the commercial part number.
TABLE V MANUFACTURER CODES
Page 115
TABLE V (Cont’d)
(B)
Parts List, Tabular Listing
5.02 Refer to Tables VIII through XXI for parts lists of Pattern Generator components
listed in Table VI and of accessory items listed in Table VII.
TABLE VI
Page 116
TABLE VI (CONT'D)
REF
DESIG
MFR'S
PART NO.
MFR'S
CODE NO.
CKT CARD ASSY,SIGNAL PATTERN
MATRIX
CKT CARD ASSY,EXTENDER CARD:
CKT CARD ASSY,PATTERN GEN HARNESS CARD:
80372080-000
96238
80372180-000
80372090-000
96238
96238
A11
A12
A13
CRYSTAL BRACKET ASSY:
POWER SUPPLY,PATTERN GEN:
LINE CORD ASSY:
90372006-000
90372004-000
74000054-000
96238
96238
96238
A13P1
CONN,PLUG,ELEC:
7571
74545
A13W1
CABLE ASSY,PWR:
74000000-002
96238
A14
CKT CARD ASSY: SEL SWITCH
80372200-000
96238
DS1
LIGHT,INDICATOR:
72619
J1
J2
JACK,TELEPHONE:
CONN,RCPT. ELEC: 12 PIN
507-3905-1437500
N112A
90372005-000
MP1
KNOB FOR S1
PS70D95C1BLK
MP2,3,6
7,9
MP5
MP10MP15
MP16,17
KNOB FOR S2,S3,S7, AND S9
PS70BLS2BLK
21604
2BLK
21604
KNOB FOR S5, MODIFIED
PUSHBOTTON FOR S10 THROUGH
S15
HANDLE
57025147-000
96238
400/3
56025087-000
82104
96238
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10-S15
S16
(P/O A11 ASSY 90372006-000)
SWITCH,ROTARY: 4 POLE, 10 POS
SWITCH,ROTARY: 3 POLE, 6 POS
SWITCH,PB: SPDT, 115 VAC MOM.
SWITCH,ROTARY: 2 POLE, 5-10 POS
SWITCH,ROTARY: 2 POLE, 4 POS
SWITCH,ROTARY: 2 POLE, 6 POS
SWITCH,ROCKER:
SWITCH,ROTARY: 3 POLE, 3 POS
(USED ON A14 80372200-000)
SWITCH,PB:
46020389-000
46020386-000
MSP105F
46020391-000
46020397-000
46020383-000
LRSW322N30KCR
46020388-000
96238
96238
95146
96238
96238
96238
22753
96238
46027640-000
96238
TP1
TP2
POST,BINDING: RED
POST,BINDING: BLACK
111-102
111-103
74970
74970
XDS1
SOCKET,IND LIGHT:
515-0012
72619
Y1-Y6
FREQUENCY VALUES OF CRYSTALS IS
DETERMINED BY THE RATE SPECIFIED BY
THE CUSTOMER
XTAL UNIT, QTZ: 1.920MHZ
40040081-000
96238
A8
A9
A10
Y7
PAGE 117
DESCRIPTION
COLORLESS LENS
82389
96238
TABLE VII
ACCESSORY ITEMS: (OPTIONAL)
REF
DESIG
Y1
Y2
Y3
Y4
Y5
Y6
DESCRIPTION
MFR'S
PART NO.
MFR'S
CODE NO.
CASE AND COVER ASSEMBLY
64030083-000
96238
DIAL ASSEMBLY:
57025141-000
96238
XTAL
XTAL
XTAL
XTAL
XTAL
XTAL
40040082-001
40040082-002
40040082-004
40040082-006
40040082-003
40040082-005
96238
96238
96238
96238
96238
96238
57000021-000
96238
UNIT,QTZ: 291.200KHZ
UNIT,QTZ: 363.712KHZ
UNIT,QTZ: 391.296KHZ
UNIT,QTZ:474.880KHZ
UNIT,QTZ: 352.000KHZ
UNIT,QTZ: 430.400KHZ
(DIAL ASSY 57025141-000 AND CRYSTALS
Y1-Y6 ARE USED SIMULTANEOUSLY)
DIAL ASSEMBLY:
Y1-Y6
(CRYSTALS SPECIFIED BY CUSTOMER)
REF
DESIG
TABLE VIII
CIRCUIT CARD ASSEMBLY, TIME-BASE LOGIC: A1, 80372010-00
MFR'S
DESCRIPTION
PART NO.
MFR'S
CODE NO.
A1
CKT CARD ASSY,OSCILLATOR:
80372190-000
96238
C1,C2
C3
CAP,FXD,CERAMIC: 0.0LUF, ±35%, 100V
CAP,FXD,ELCTLT: 4.7UF, ±20% 10V
TA01UF
CS13BC475M
91418
81349
CR1,CR2
CR3-CR5
CR6
SEMICOND,DIODE: SILICON
SIMICOND,DIODE: GERMANIUM
SAME AS CR1
1N914
1N277
81349
81349
IC1,IC2
IC3,IC4
IC5,IC6
INTEGRATED
INTEGRATED
INTEGRATED
NOR GATE
INTEGRATED
FLIP-FLOP
INTEGRATED
FLIP-FLOP
CKT: NAND/NOR GATE
CKT: NAND/NOR GATE
CKT: QUAD 2-INPUT NAND/
SN15849N
MC858P
SN15846N
01295
04713
01295
CKT: DUAL J-K CLOCKED
SN158097N
01295
CKT: DUAL J-K CLOCKED
SN158099N
01295
IC7
IC8
PAGE 118
TABLE VIII (CONT'D)
REF
DESIG
MFR'S
PART NO.
MFR'S
CODE NO.
SN158094N
01295
IC10
INTEGRATED CKT: DUAL J-K CLOCKED
FLOP-FLOP
INTEGRATED CKT: 4 BIT BINARY COUNTER
SN7493N
01295
Q1
Q2
Q3
TRANSISTOR: NPN
TRANSISTOR: NPN
SAME AS Q1
2N2222
2N706
81349
81349
R1
R2
R3
R4-R16
R17
R18
R19
R20
RES,FXD,COMP:
RES,FXD,COMP:
RES,FXD,COMP:
RES,FXD,COMP:
SAME AS R3
RES,FXD,COMP:
RES,FXD,COMP:
SAME AS R18
6.8 OHMS, ±5%, 1/4W
2.2K OHMS, ±5%, 1/4W
1K OHMS, ±5%, 1/4W
10K OHMS, ±5%, 1/4W
RC07GF682J
RC07GF222J
RC07GF102J
RC07GF103J
81349
81349
81349
81349
3K OHMS, ±5%, 1/4W
47K OHMS, ±5%, 1/4W
RC07GF302J
RC07GF473J
81349
81349
REF
DESIG
TABLE IX
CIRCUIT CARD ASSEMBLY, OSCILLATOR: A1A1, 80372190-000
MFR'S
DESCRIPTION
PART NO.
C1
C2
C3-C8
C9,C10
CAP,FXD,CERAMIC: 0.0LUF, ±35% 100V
CAP,FXD,CERAMIC: 0.1UF, ±20% 25V
NOT USED
SAME AS C1
TA01UF
5C023104X0250B3
91418
56289
CR1
CR2-CR5
SEMICOND,DIODE: SILICON
SEMICOND,DIODE: GERMANIUM
1N914
1N277
81349
81349
Q1
Q2,Q3
Q4
Q5
Q6
TRANSISTOR: PNP
TRANSISTOR:
TRANSISTOR: NPN
TRANSISTOR: NPN
SAME AS Q4
2N2907
2N5222
2N706
2N2222
81349
04713
81349
81349
R1
R2
R3
R4
R5
R6
R7-R11
RES,FXD,COMP:
RES,FXD,COMP:
RES,FXD,COMP:
RES,FXD,COMP:
RES,FXD,COMP:
RES,FXD,COMP:
NOT USED
RC07GF822J
RC07GF302J
RC07GF512J
RC07GF332J
RC07GF393J
RC07GF183J
81349
81349
81349
81349
81349
81349
IC9
PAGE 119
DESCRIPTION
8.2K OHMS, ±5%, 1/4W
3K OHMS, ±5%, 1/4W
3.1K OHMS, ±5%, 1/4W
3.3K OHMS, ±5%, 1/4W
39K OHMS, ±5%, 1/4W
18K OHM, ±5%, 1/4W
MFR'S
CODE NO.
TABLE IX (CONT'D)
REF
DESIG
DESCRIPTION
R12
R13
R14
R15
R16
RES,FXD,COMP:
RES,FXD,COMP:
RES,FXD,COMP:
RES,FXD,COMP:
RES,FXD,COMP:
REF
DESIG
TABLE X
CIRCUIT CARD ASSEMBLY,POWER SUPPLY: A2 80372020-000
MFR'S
DESCRIPTION
PART NO.
C1,C2
C3
C4
C5
C6
CAP,FXD,ELCTLT: 260UF, 30V
CAP,FXD,ELCTLT: 15UF, ±10%, 35V
CAP,FXD,ELCTLT: 1UF, ±10%, 35V
SAME AS C3
CAP,FXD,MICA: 4700PF, ±5%, 500V
C7
CAP,FXD,MICA: 560PF, ±10%, 500V
C8
C9,C10
CAP,FXD,ELCTLT: 22UF, ±10%, 35V
SAME AS C3
CR1-CR4
CR5,CR6
CR7
15K OHMS, ±5%, 1/4W
2.4K OHMS, ±5%, 1/4W
100 OHMS, ±5%, 1/4W
10K OHMS, ±5%, 1/4W
2K OHMS, ±5%, 1/4W
MFR'S
PART NO.
MFR'S
CODE NO.
RC07GF153J
RC07GF242J
RC07GF101J
RC07GF103J
RC07GF202J
81349
81349
81349
81349
81349
MFR'S
CODE NO.
39D257G030EL4
CS13BF156K
CS13BF105K
56289
81349
81349
DM19E472J0500
WV4CR
DM15F561K0500
WV4CR
CS13BF226K
72136
SEMICOND,DIODE: SILICON
SEMICOND,DIODE: SILICON
RECTIFIER,SILICON:
1N645
1N1614
C106Q21
81349
81349
03508
F1,F2
F3
FUSE,CARTRIDGE: 1/8 AMP
FUSE,CARTRIDGE: 3/4 AMP
312-125
312-750
75915
75915
Q1
Q2
Q3,Q4
Q5
Q6
Q7,Q8
Q9
TRANSISTOR:
TRANSISTOR:
TRANSISTOR:
TRANSISTOR:
SAME AS Q1
SAME AS Q2
SAME AS Q3
2N1613
2N930
2N2905
2N297
81349
81349
81349
81349
R1
R2-R4
R5
R6
RES,FXD,COMP: 39 OHMS, ±5%, 2W
RES,FXD,COMP: 1K OHMS, ±5%, 1/4W
RES,FXD,COMP: 1.5K OHMS, ±5%, 1/4W
RESISTOR,VAR:500 OHMS, 1/4W
RC42GF390J
RC07GF102J
RC07GF152J
200P1-501
81349
81349
81349
80294
PAGE 120
NPN
NPN
PNP
PNP
72136
81349
TABLE X (CONT'D)
REF
DESIG
DESCRIPTION
MFR'S
PART NO.
MFR'S
CODE NO.
R7
R8
R9
R10
R11-R13
R14
R15
R16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27,R28
R29
SAME AS R2
RES,FXD,COMP:
RES,FXD,COMP:
SAME AS R1
SAME AS R2
SAME AS R8
RES,FXD,COMP:
RES,FXD,WW: 1
RES,FXD,COMP:
RES,FXD,COMP:
RES,FXD,COMP:
RES,FXD,FILM:
RESISTOR,VAR:
RES,FXD,FILM:
RES,FXD,COMP:
RES,FXD,COMP:
SAME AS R18
RES,FXD,COMP:
SAME AS R2
RES,FXD,COMP:
6.8K OHMS, ±5%, 1/4W
680 OHMS, ±5%, 1/2W
RC07GF682J
RC20GF681J
81349
81349
(FACTORY SELECT)
OHMS, ±5%, 5W
180 OHMS, ±5%, 1/4W
560 OHMS, ±5%, 1/4W
22 OHMS, ±5%, 1/2W
453 OHMS, ±10%, 1/8W
200 OHMS, 1/4W
732 OHMS, ±1%, 1/8W
2.2K OHMS, ±5%, 1/4W
4700 OHMS, ±5%, 1/4W
RW67V1R0
RC07GF181J
RC07GF561J
RC20GF220J
RN55D4530F
200P1-201
RN55D7320F
RC07GF222J
RC07GF471J
81349
81349
81349
81349
81349
80294
81349
81349
81349
620 OHMS, ±5%, 1/4W
RC07GF621J
81349
680 OHMS, ±5%, 1/4W
RC07GF681J
81349
VR1
VR2
VR3
SEMICOND,DIODE: ZENER
SEMICOND,DIODE: ZENER
SAME AS VR1
1N752
1N748
81349
81349
TABLE XI
CIRCUIT CARD ASSEMBLY, DATA OUTPUT CIRCUITS HI-LO LEVEL: A3, 80372030-000
REF
DESIG
C1
C2
C3
C4,C5
C6,C7
C8
C9,C10
C11
C12
PAGE 121
DESCRIPTION
CAP,FXD,CERAMIC: 2000PF, 1000V
CAP,FXD,CERAMIC: 0.00LUF, ±20%,
1000V
CAP,FXD,CERAMIC: 0.0LUF, ±35%,
100V
CAP,FXD,CERAMIC: 0.05UF, ±20%, 100V
NOT USED
CAP,FXD,CERAMIC: 0.015UF, ±20%,
1000V
NOT USED
SAME AS C8
CAP,FXD,MICA: 120PF, ±10% 500V
MFR'S
PART NO.
MFR'S
CODE NO.
DD202
5GAD10
71590
56289
TA01UF
91418
TGS50
56289
CCD153
72136
DM15E121K0500
WV4CR
72136
TABLE XI (CONT'D)
REF
DESIG
DESCRIPTION
MFR'S
PART NO.
MFR'S
CODE NO.
C13
C14,C15
C16
C17
CAP,FXD,ELCTLT: 4.7UF, ±20% 10V
SAME AS C2
SAME AS C3
CAP,FXD,ELCTLT: 4.7UF, ±20%, 35V
CS13BC475M
81349
CS13BF475M
81349
CR1
CR2,CR3
CR4
CR5
CR6-CR9
CR10
CR11
CR12-CR15
CR16-CR18
CR19
SEMICOND,DIODE:
SEMICOND,DIODE:
SEMICOND,DIODE:
SAME AS CR2
SEMICOND,DIODE:
SAME AS CR4
SAME AS CR2
SAME AS CR6
SAME AS CR1
SAME AS CR2
GERMANIUM
SILICON
ZENER
1N277
1N914
1N746
81349
81349
81349
SILICON
1N647
81349
F1,F2
FUSE,CARTRIDGE: 1/8 AMP
312-125
75915
IC1
IC2
INTEGRATED CKT: FLIP-FLOP
INTEGRATED CKT: QUAD 2-INPUT
NAND GATE
SN15845N
SN15846N
01295
01295
Q1
Q2-Q4
Q5-Q8
Q9
Q10
Q11
Q12,Q13
TRANSISTOR: UNIJUNCTION
TRANSISTOR: PNP
TRANSISTOR: NPN
TRANSISTOR:
SAME AS Q2
SAME AS Q9
SAME AS Q2
2N2646
2N2905
40001213-000
2N2222
04713
81349
96238
81349
R1,R2
R3
R4
R5
RES,FXD,COMP:
RES,FXD,COMP:
RES,FXD,COMP:
RES,FXD,FILM:
1/8W
RES,FXD,COMP:
1/4W
SAME AS R1
SAME AS R6
SAME AS R1
RES,FXD,COMP:
RES,FXD,COMP:
NOT USED
SAME AS R10
SAME AS R11
62K OHMS, ±5%, 1/4W
33K OHMS, ±5%, 1/4W
1K OHMS, ±5%, 1/4W
1.5K OHMS, ±1%
RC07GF623J
RC07GF333J
RC07GF102J
RN55D1501F
81349
81349
81349
81349
6.8K OHMS, ±5%,
RC07GF682J
81349
1K OHMS, ±5%, 1/2W
100 OHMS, ±5%, 1/4W
RC20GF102J
RC07GF101J
81349
81349
R6
R7
R8
R9
R10
R11
R12,R13
R14
R15
PAGE 122
TABLE XI (CONT'D)
REF
DESIG
MFR'S
PART NO.
DESCRIPTION
R16,R17
NOT USED
R18
RES,FXD,COMP: 20K OHMS, ±5%, 1/4W
RC07GF203J
19
SAME AS R6
20
RES,FXD,COMP: 51K OHMS, ±5%, 1/4W
RC07GF513J
R21
SAME AS R5
R22,R23
RES,FXD,FILM: 6190 OHMS, ±1%, 1/8W
RN55D6191F
R24
SAME AS R5
R25,R26
SAME AS R10
R27
RES,FXD,COMP: 3.6K OHMS, ±5%, 1/4W
RC07GF362J
R28
RES,FXD,COMP: 68K OHMS, ±5%, 1/4W
RC07GF683J
R29
SAME AS R4
R30
NOT USED
R31
RES,FXD,COMP: 10K OHMS, ±5%, 1/4W
RC07GF103J
R32,R33
RES,FXD,COMP: 5.1K OHMS, ±5%, 1/4W
RC07GF512J
R34,R35
RES,FXD,COMP: 3K OHMS, ±5%, 1/4W
RC07GF302J
T1
TRANSFORMER, PULSE: 500V, 60HZ
43003041-000
TABLE XII
CIRCUIT CARD ASSEMBLY, MESSAGE CONTROL CIRCUITS: A4, 80372040-000
REF
MFR'S
DESIG
DESCRIPTION
PART NO.
MFR'S
CODE NO.
81349
81349
81349
81349
81349
81349
81349
81349
96238
MFR'S
CODE NO.
C1
C2
C3
CAP,FXD,CERAMIC: 2000PF, 1000V
CAP,FXD,CERAMIC: 0.01UF, ±35%, 100V
CAP,FXD,ELCTLT: 4.7UF, ±20%, 10V
DD202
TA01UF
CS13BC475M
71590
91418
81349
CR1-CR3
CR4,CR5
CR6,CR7
SEMICOND,DIODE: SILICON
SEMICOND,DIODE: GERMANIUM
SAME AS CR1
1N914
1N277
81349
81349
IC1
INTEGRATED CKT:
GATE
INTEGRATED CKT:
NAND GATE
INTEGRATED CKT:
SAME AS IC2
INTEGRATED CKT:
SAME AS IC1
SAME AS IC3
INTEGRATED CKT:
FLIP-FLOP
QUAD 2-INPUT NAND
SN15846N
01295
HEX INVERTER
SN15830N
01295
HEX INVERTER
SN15836N
01295
DIVIDE BY 12 COUNTER
SN7492N
01295
DUAL J-K CLOCKED
SN158093N
01295
IC2
IC3
IC4
IC5
IC6
IC7
IC8
PAGE 123
TABLE XII (CONT'D)
REF
DESIG
MFR'S
PART NO.
MFR'S
CODE NO.
SN158099N
01295
IC10
IC11
INTEGRATED CKT: DUAL J-K CLOCKED
FLIP-FLOP
SAME AS IC2
SAME AS IC9
Q1,Q2
Q3
TRANSISTOR: NPN
TRANSISTOR: PNP
2N930
2N2907
81349
81349
IC9
DESCRIPTION
R1,R2
RES,FXD,COMP: 10K OHMS, ±5%, 1/4W
RC07GF103J
R3
NOT USED
R4
RES,FXD,COMP: 6.8K OHMS, ±5%, 1/4W
RC07GF682J
R5
RES,FXD,COMP: 15K OHMS, ±5%, 1/4W
RC07GF153J
R6
RES,FXD,COMP: 1.5K OHMS, ±5%, 1/4W
RC07GF152J
R7
RES,FXD,COMP: 22K OHMS, ±5%, 1/4W
RC07GF223J
R8
RES,FXD,COMP: 6.2K OHMS, ±5%, 1/4W
RC07GF622J
R9
NOT USED
R10
RES,FXD,COMP: 220 OHMS, ±5%, 1/4W
RC07GF221J
R11
RES,FXD,COMP: 39K OHMS, ±5%, 1/4W
RC07GF393J
R12
RES,FXD,COMP: 62K OHMS, ±5%, 1/4W
RC07GF623J
R13-R16
SAME AS R1
R17
SAME AS R6
TABLE XIII
CIRCUIT CARD ASSEMBLY, DISTORTION GENERATOR: A5, 80372050-000
REF
MFR'S
DESIG
DESCRIPTION
PART NO.
81349
C1
C2
C3
CAP,FXD,CERAMIC: 0.01UF, ±35%, 100V
CAP,FXD,ELCTLT: 4.7UF, ±20%, 10V
CAP,FXD,MICA: 100PF, ±5%, 500V
TA01UF
CS13BC475M
DM15F101J0500
WV4CR
91418
81349
72136
CR1-CR4
CR5
SEMICOND,DIODE: SILICON
SEMICOND,DIODE: GERMANIUM
1N914
1N277
81349
81349
IC1,IC2
IC3
INTEGRATED
INTEGRATED
FLIP-FLOP
INTEGRATED
GATE
INTEGRATED
NAND GATE
INTEGRATED
CKT: HEX INVERTER
CKT: DUAL J-K CLOCKED
SN15836N
SN158093N
01295
01295
CKT: QUAD 2-INPUT NAND
SN15846N
01295
CKT: DUAL 4-INPUT EXP.
SN15830N
01295
CKT: DECADE COUNTER
SN7490N
01295
IC4
IC5,IC6
IC7
PAGE 124
81349
81349
81349
81349
81349
81349
81349
81349
MFR'S
CODE NO.
TABLE XIII (CONT'D)
REF
DESIG
MFR'S
PART NO.
MFR'S
CODE NO.
SN7442N
01295
IC12
IC13
SAME AS IC1
SAME AS IC7
SAME AS IC1
INTEGRATED CKT: BCD-TO-DECIMAL 4-10
LINE DECODER
SAME AS IC4
SAME AS IC11
Q1
TRANSISTOR: SILICON
2N708
81349
IC8
IC9
IC10
IC11
DESCRIPTION
R1
RES,FXD,COMP: 2K OHMS, ±5%, 1/4W
RC07GF202J
R2
RES,FXD,COMP: 5.1K OHMS, ±5%, 1/4W
RC07GF512J
R3
RES,FXD,COMP: 220 OHMS, ±5%, 1/4W
RC07GF221J
R4
RES,FXD,COMP: 1.2K OHMS, ±5%, 1/4W
RC07GF122J
R5-R14
RES,FXD,COMP: 10K OHMS, ±5%, 1/4W
RC07GF103J
TABLE XIV
CIRCUIT CARD ASSEMBLY, MESSAGE GENERATOR: A6, 80372060-000
C1
CAP,FXD,ELCTLT: 4.7UF, ±20%, 10V
CS13BC475M
C2
CAP,FXD,CERAMIC: 0.01UF, ±35%, 100V
TA01UF
C3,C4
CAP,FXD,ELCTLT: 4.7UF, ±20%, 35V
CS13AF4R7M
81349
81349
81349
81349
81349
CR1-CR11
SEMICOND,DIODE: SILICON
1N914
81349
IC1
INTEGRATED CKT:
FLIP-FLOP
INTEGRATED CKT:
NAND GATE
INTEGRATED CKT:
SAME AS IC1
INTEGRATED CKT:
INTEGRATED CKT:
GATE
SAME AS IC1
SAME AS IC3
INTEGRATED CKT:
DUAL J-K CLOCKED
SN158099N
01295
DUAL 4-INPUT EXP.
SN15830N
01295
HEX INVERTER
SN15836N
01295
READ ONLY MEMORY
QUAD 2-INPUT NAND
MM522
SN15846N
12040
01295
HEX INVERTER
SN7404N
01295
IC2
IC3
IC4
IC5
IC6
7
IC8
IC9,IC10
PAGE 125
81349
91418
81349
TABLE XIV (CONT'D)
REF
DESIG
DESCRIPTION
R1-R8
R9-R16
R17,R18
R19,R20
RES,FXD,COMP:
RES,FXD,COMP:
RES,FXD,COMP:
RES,FXD,COMP:
6.8K OHMS, ±5/5, 1/4W
7.5K OHMS, ±5%, 1/4W
10K OHMS, ±5%, 1/4W
68 OHMS, ±5%, 1/2W
MFR'S
PART NO.
MFR'S
CODE NO.
RC07GF682J
RC07GF752J
RC07GF103J
RC20GF680J
81349
81349
81349
81349
VR1,VR2
SEMICOND,DIODE: ZENER 12V, 1W
1N4742
TABLE XV
CIRCUIT CARD ASSEMBLY, CHARACTER DISTR & TIMING CONTROL: A7, 80372070REF
MFR'S
DESIG
DESCRIPTION
PART NO.
04713
C1
C2
CAP,FXD,CERAMIC: 2000PF, 1000V
CAP,FXD,MICA: 150PF, ±5%, 500V
71590
72136
C3
C4
CAP,FXD,CERAMIC: 0.01UF, ±35%, 100V
CAP,FXD,ELCTLT: 4.7UF, ±20%, 10V
DD202
DM15F151J0500
WV4CR
TA01UF
CS13BC475M
CR1-CR3
CR4
CR5,CR6
SEMICOND,DIODE: GERMANIUM
SEMICOND,DIODE: SILICON
SAME AS CR1
1N277
1N914
81349
81349
IC1,IC2
QUAD 2-INPUT NAND
SN15846N
01295
HEX INVERTER
TRIPLE: 3-INPUT NAND/
SN15836N
SN15862N
01295
01295
DUAL J-K CLOCKED
SN15093N
01295
DUAL 4-INPUT EXP.
SN15830N
01295
IC7,IC8
IC9,IC10
INTEGRATED CKT:
GATE
INTEGRATED CKT:
INTEGRATED CKT:
NOR GATE
INTEGRATED CKT:
FLIP-FLOP
INTEGRATED CKT:
NAND GATE
SAME AS IC3
INTEGRATED CKT:
5 BIT SHIFT REGISTER
SN7496N
01295
Q1
Q2
TRANSISTOR: NPN
TRANSISTOR: NPN
2N706
2N708
81349
81349
R1-R3
R4
R5
RES,FXD,COMP: 10K OHMS, ±5%, 1/4W
RES,FXD,COMP: 62K OHMS, ±5%, 1/4W
RES,FXD,COMP: 39K OHMS, ±5%, 1/4W
RC07GF103J
RC07GF623J
RC07GF393J
81349
81349
81349
IC3
IC4
IC5
IC6
PAGE 126
MFR'S
CODE NO.
91418
81349
TABLE XV (CONT'D)
REF
DESIG
MFR'S
PART NO.
DESCRIPTION
MFR'S
CODE NO.
R6
RES,FXD,COMP: 2K OHMS, ±5%, 1/4W
RC07GF202J
R7
RES,FXD,COMP: 220 OHMS, ±5%, 1/4W
RC07GF221J
R8
RES,FXD,COMP: 5.1K OHMS, ±5%, 1/4W
RC07GF512J
R9
RES,FXD,COMP: 1.2K OHMS, ±5%, 1/4W
RC07GF122J
R10
RES,FXD,COMP: 2.2K OHMS, ±5%, 1/4W
RC07GF222J
R11
RES,FXD,COMP: 100K OHMS, ±5%, 1/4W
RC07GF104J
R12
RES,FXD,COMP: 6.8K OHMS, ±5%, 1/4W
RC07GF682J
R13,R14
NOT USED
R15,R16
SAME AS R1
TABLE XVI
CIRCUIT CARD ASSEMBLY, SIGNAL PATTERN MATRIX: A8, 80372080-000
REF
MFR'S
DESIG
DESCRIPTION
PART NO.
81349
81349
81349
81349
81349
81349
81349
C1
C2
CAP,FXD,ELCTLT: 4.7UF, ±20%, 10V
CAP,FXD,CERAMIC: 0.01UF, ±35%, 100V
CS13BC475M
TA01UF
81349
91418
CR1-CR11
SEMICOND,DIODE: SILICON
1N914
81349
IC1
INTEGRATED CKT:
NAND GATE
INTEGRATED CKT:
SAME AS IC1
INTEGRATED CKT:
GATE
INTEGRATED CKT:
INTEGRATED CKT:
LINE DECODER
SAME AS IC8
SAME AS IC5
DUAL 4-INPUT EXP.
SN15830N
01295
HEX INVERTER
MC840P
04713
QUAD 2-INPUT NAND
SN15846N
01295
HEX INVERTER
BCD-TO-DECIMAL 4-10
SN15836N
SN7442N
01295
01295
R1-R3
RES,FXD,COMP: 10K OHMS, ±5%, 1/4W
TABLE XVII
CIRCUIT CARD ASSEMBLY, EXTENDER CARD: A9, 80372180-000
REF
DESIG
DESCRIPTION
RC07GF103J
81349
MFR'S
PART NO.
MFR'S
CODE NO.
J1
225-2222110500
02660
IC2
IC3,IC4
IC5-IC7
IC8
IC9
IC10
IC11,IC12
PAGE 127
CONN,RCPT,ELEC: 22 PIN, DUAL
MFR'S
CODE NO.
TABLE XVIII
CIRCUIT CARD ASSEMBLY, PATTERN GEN HARNESS CARD: A10 80372090-00
REF
MFR'S
DESIG
DESCRIPTION
PART NO.
MFR'S
CODE NO.
XA1-XA10
CONN,RCPT,ELEC: 22 PIN
TABLE XVIX
CRYSTAL BRACKET ASSEMBLY: A11 90372006-000
REF
DESIG
DESCRIPTION
252-22-30-220
71785
MFR'S
PART NO.
MFR'S
CODE NO.
R1-R7
RES,FXD,COMP: 1K OHMS, ±5% 1/4W
RC07GF102J
81349
SI
SWITCH,ROTARY:
C212-26036-2-1
71450
XY1-XY7
SOCKET,CRYSTAL:
TABLE XX
POWER SUPPLY, PATTERN GENERATOR: A12, 90372004-000
REF
DESIG
DESCRIPTION
TS0205P01
81349
MFR'S
PART NO.
MFR'S
CODE NO.
C1
CAP,FXD,ELCTLT: 4600UF, 15V
36D462G015AA2A
56289
E1-E4
E5,E6
TERMINAL,STANDOFF:
TERMINAL,STANDOFF
4820-1-0516
4821-1-0516
71279
71279
F1
FUSE,CARTRIDGE: 1/4 AMP-3AG
312-250
75915
J1
J2
CONN,RCPT,ELEC:
CONN,RCPT,ELEC: COAXIAL
7595
UG1094U
74545
81349
R1
RES,FXD,WW: 3-3K, 5W
RW67V332
81349
SI
SWITCH,TOGGLE: SPDT
MST105D
95146
T1
TRANSFOMER,PWR: 47HZ, 132 VAC
43000276-000
96238
TB1,TB2
TERMINAL BOARD: 7 TERM
599-2004-7
75382
XF1
FUSEHOLDER:
HKP
71400
PAGE 128
TABLE XXI
CIRCUIT CARD ASSEMBLY, SELECTOR SWITCH: A14, 80372200-000
REF
MFR'S
DESIG
DESCRIPTION
PART NO.
MFR'S
CODE NO.
CR1-CR8
SEMICOND,DIODE: SILICON
1N914
81349
S10-S15
SWITCH,PB: SEQ CHAR
46027641-000
96238
PAGE 129
TABLE XXII
PART NUMBER - NATIONAL STOCK NUMBER
CROSS REFERENCE INDEX
NATIONAL
PART
STOCK
NUMBER
FSCM
NUMBER
PART
NUMBER
FSCM
NATIONAL
STOCK
NUMBER
CS13BF105K
81349
5910-00-787-2109
RC07GF393J
81349
5905-00-115-8055
CS13BF156K
81349
5910-00-779-4968
RC07GF471J
81349
5905-00-120-9154
CS13BF226K
81349
5910-00-779-8390
RC07GF471J
81349
5905-00-683-2242
DD202
71590
5910-00-044-6034
RC07GF473J
81349
5905-00-683-2246
DD202
71590
5910-00-538-1508
RC07GF512J
81349
5905-00-683-2241
DM15F101J0500WV4CR
72136
5910-00-984-7588
RC07GF513J
81349
5905-00-682-4103
DM15F151J0500WV4CR
72136
5910-01-030-1770
RC07GF561J
81349
5905-00-682-4109
HKP
71400
5920-00-892-9311
RC07GF621J
81349
5905-00-801-6998
MC858P
04713
5962-00-184-8205
RC07GF622J
81349
5905-00-682-4100
MSP105F
95146
5930-00-059-3399
RC07GF623J
81349
5905-00-682-4104
MST105D
95146
5930-00-902-4150
RC07GF681J
81349
5905-00-727-8001
N112A
82389
5935-00-893-3935
RC07GF682J
81349
5905-00-110-7622
RC07GF101J
81349
5905-00-683-7721
RC07GF683J
81349
5905-00-119-3505
RC07GF102J
81349
5905-00-681-6462
RC07GF752J
81349
5905-00-682-4101
RC07GF103J
81349
5905-00-683-2238
RC07GF822J
81349
5905-00-831-6134
RC07GF104J
81349
5905-00-110-0388
RC20GF102J
81349
5905-00-110-0196
RC07GF104J
81349
5905-00-686-3129
RC20GF220J
81349
5905-00-279-3519
RC07GF122J
81349
5905-00-686-9994
RC20GF680J
81349
5905-00-116-8566
RC07GF152J
81349
5905-00-683-7723
RC20GF681J
81349
5905-00-111-8357
RC07GF153J
81349
5905-00-681-8818
RC20GF681J
81349
5905-00-111-8357
RC07GF181J
81349
5905-00-097-9534
RC42GF390J
81349
5905-00-279-3418
RC07GF183J
81349
5905-00-687-0000
RN55D1501F
81349
5905-00-728-1659
RC07GF202J
81349
5905-00-686-3370
RN55D4530F
81349
5905-00-913-5086
RC07GF203J
81349
5905-00-686-3368
RN55D6191F
81349
5905-00-965-9088
RC07GF221J
81349
5905-00-683-2240
RW67V1R0
81349
5905-00-081-7348
RC07GF222J
81349
5905-00-723-5251
RW67V332
81349
5905-00-975-1139
RC07GF223J
81349
5905-00-687-0002
SN158093N
01295
5962-00-103-4463
RC07GF242J
RC07GF302J
81349
81349
5905-00-683-7724
5905-00-682-4097
SN158093N
SN158094N
01295
01295
5962-00-103-4463
5962-00-163-4166
RC07GF332J
81349
5905-00-681-9969
SN158099N
01295
5962-00-420-6545
RC07GF333J
81349
5905-00-686-3903
SN15830N
01295
5962-00-011-2962
RC07GF362J
81349
5905-00-805-9714
SN15836N
01295
5962-00-193-0323
PAGE 130
TABLE XXII
PART NUMBER - NATIONAL STOCK NUMBER
CROSS REFERENCE INDEX (CONT'D)
FSCM
NATIONAL
STOCK
NUMBER
PART
NUMBER
FSCM
NATIONAL
STOCK
NUMBER
SN15845N
01295
5962-00-011-3010
46020383-000
96238
5930-01-009-7615
SN15846N
01295
5962-00-819-2215
46020386-000
96238
5930-01-013-8409
SN15849N
01295
5962-00-130-0353
46020388-000
96238
5930-01-013-8410
SN15862N
01295
5962-00-927-1749
46020389-000
96238
5930-01-013-8411
SN7404N
01295
5962-00-404-2559
46020391-000
96238
5930-01-013-7293
SN7442N
01295
5962-00-193-0329
46020397-000
96238
5930-01-013-7294
SN7490N
01295
5962-00-102-7519
46027640-000
96238
5930-01-010-7648
SN7493N
01295
5962-00-102-7520
46027641-000
96238
5930-01-010-7649
SN7496N
01295
5962-00-404-6174
4821-1-0516
71279
5940-00-901-4899
TGS50
56289
5910-00-577-3281
5GAD10
56289
5910-00-822-5682
TSO205P01
81349
5935-00-581-6941
5GAD10
56289
5910-00-822-5682
1N1614
81349
5961-00-410-3858
507-3905-1437-500
72619
6240-00-001-1524
1N4742
04713
5961-00-076-1403
599-2004-7
75382
5940-00-229-6900
1N645
81349
5961-00-577-6084
74000000-002
96238
5995-01-010-0022
1N746
81349
5961-00-847-5246
7571
74545
5935-00-480-7278
1N914
81349
5961-00-022-5664
7595
74545
5935-00-937-4219
111-102
74970
5940-00-615-2282
80372010-000
96238
6625-00-205-0294
111-103
74970
5940-00-688-2770
80372020-000
96238
6625-00-205-0298
2N2646
04713
5961-00-902-1177
80372030-000
96238
6625-00-205-0299
200P1-201
80294
5905-00-801-6213
80372040-000
96238
6625-00-207-9851
200P1-501
80294
5905-00-682-4142
80372050-000
96238
6625-00-207-9922
312-125
75915
5920-00-082-7437
80372060-000
96238
6625-00-213-2624
312-250
75915
5920-00-280-4181
80372070-000
96238
6625-00-207-9930
312-750
75915
5920-00-881-6775
80372080-000
96238
6625-00-213-2620
36D462G015AA2A
56289
5910-00-828-7905
80372090-000
96239
6625-00-213-2621
39D257G030EL4
56289
5910-00-927-5130
80372180-000
96238
6625-00-213-2686
40001213-000
96238
5961-00-584-2365
80372200-000
96238
6625-00-209-5333
40040082-004
96238
5955-01-009-4538
90372005-000
96238
5935-01-009-5653
40040082-005
96238
5955-01-009-4539
PART
NUMBER
PAGE 131
APPENDIX A
REFERENCES
DA Pam 310-4
I n d e x o f T e c h n i c a l P u b l i c a t i o n s : Technical Manuals,
T e c h n i c a l B u l l e t i n s , Supply Manuals (Types 7, 8,
and 9), Supply Bulletins, and Lubrication Orders.
DA Pam 310-7
US Army Equipment Index of Modification Work Orders.
TM 38-750
The Army Maintenance Management System (TAMMS).
TM 750-244-2
Procedures for Destruction of Electronics Materiel
to Prevent Enemy Use.
(Electronics Command).
Page A-1
APPENDIX B
COMPONENTS OF END ITEM LIST
Section I.
B-1 .
INTRODUCTION
Scope
This appendix lists integral components of and basis issue items for
the Signal Generator SG-1054/G to help you inventory items required for
safe and efficient operation.
B-2 .
General
This Components of End Item List is divided into the following sections:
a.
S e c t i o n I I . Integral Components of the End Item.
These items,
when assembled, comprise the Signal Generator SG-1054/G and must accompany it whenever it is transferred or turned in. T h e i l l u s t r a t i o n s w i l l
help you identify these items.
b . S e c t i o n I I I . Basic Issue Items. These are the minimum essential
items required to place the Signal Generator SG–1054/G in operation, to
o p e r a t e i t , a n d t o p e r f o r m e m e r g e n c y r e p a i r s . Although shipped separately packed, they must accompany the SG-1054/G during operation and whenever it is transferred between accountable officers. T h e i l l u s t r a t i o n s
w i l l a s s i s t y o u w i t h h a r d - t o - i d e n t i f y i t e m s . This manual is your authori t y t o r e q u i s i t i o n r e p l a c e m e n t B I I , based on TOE/MTOE authorization of
the end item.
B-3 .
a.
Explanation of Columns
Illustration.
This column is divided as follows:
(1) Figure number. Indicates the figure number of the illustration
on which the item is shown.
(2) Item number. Not applicable.
b. National Stock Number.
Indicates the National stock number
assigned to the item and which will be used for requisitioning.
Indicates the Federal item name and, if required, a
c. Description.
minimum description to identify the item. The part number indicates the
primary number used by the manufacturer, which controls the design and
characteristics of the item by means of its engineering drawings, specif i c a t i o n s , s t a n d a r d s , and inspection requirements to identify an item or
range of items.
Following the part number, the Federal Supply Code for
Manufacturers (FSCM) is shown in parentheses.
Page B-1
d.
Location.
Not
applicable.
e. Usable on Code. Not applicable.
f . Q u a n t i t y R e q u i r e d ( Q t y R e q d ) . This column lists the quantity of
each item required for a complete major item.
g.
Under
major
major
Quantity. This column is left blank for use during an inventory.
the Rcvd column, list the quantity you actually receive on your
item. The Date columns are for your use when you inventory the
item.
Page B-2
SECTION II INTEGRAL COMPONENTS OF END ITEM
(1)
(2)
(3)
ILLUSTRATION
NATIONAL
DESCRIPTION
(A)
(B)
STOCK
FIG
ITEM
NUMBER
NO.
NO.
PART NUMBER
(FSCM)
1
SIGNAL GENERATOR SG-1054/G
(96238)
1
LINE CORD ASSEMBLY
74000054-000
(96238)
1
6625-00-137-7738
PAGE B-3
(4)
(5)
LOCATION USABLE
ON
CODE
(6)
QTY
REQD
(7)
QUANTITY
RCVD
DATE
SECTION III BASIC ISSUE ITEMS
(1)
(2)
ILLUSTRATION
NATIONAL
(A)
(B)
STOCK
FIG
ITEM
NUMBER
NO.
NO.
(3)
DESCRIPTION
PART NUMBER
TECHNICAL MANUAL
TM 11-6625-2921-14&P
PAGE B-4
(4)
(5)
LOCATION USABLE
ON
CODE
(6)
QTY
REQD
(7)
QUANTITY
RCVD
(FSCM)
1
DATE
APPENDIX D
MAINTENANCE ALLOCATION
Section I.
D-1.
INTRODUCTION
General
This appendix provides a summary of the maintenance operations for
Signal Generator SG1054/G.
It authorizes categories of maintenance for
specific maintenance functions on repairable items and components and
This
the tools and equipment required to perform each function.
appendix may be used as an aid in planning maintenance operations.
D-2 .
Maintenance Function
Maintenance functions will be limited to and defined as follows:
a . I n s p e c t . To determine the serviceability of an item by comparing
its—physical, mechanical, and/or electrical characteristics with established standards through examination.
b . T e s t . To verify serviceability and to detect incipient failure
by measuring the mechanical or electrical characteristics of an item and
comparing those characteristics with prescribed standards.
c . S e r v i c e . Operations required periodically to keep an item in
proPer operating condition, i.e., to clean (decontaminate), to preserve,
to drain, to paint, or to replenish fuel, lubricants, hydraulic fluids,
or compressed air supplies.
d. Adjust. To maintain, within prescribed limits, by bringing into
proper or exact position, or by setting the operating characteristics to
the specified parameters.
e. Align. To adjust specified variable elements of an item to bring
about optimum or desired performance.
f. Calibrate. To determine and cause corrections to be made or to
be adjusted on instruments or test measuring and diagnostic equipments
used in precision measurement.
Consists of comparisons of two instruments, one of which is a certified standard of known accuracy, to detect
and adjust any discrepancy in the accuracy of the instrument being compared.
g. Install. The act of emplacing, seating, or fixing into position
an item, part, module (component or assembly) in a manner to allow the
proper functioning of the equipment or system.
Page D-1
h.
Replace.
The act of substituting a serviceable like type part,
subassembly, or module (component or assembly) for an unserviceable
counterpart.
i. Repair. The application of maintenance services (inspect, test,
s e r v i c e , a d j u s t , align, calibrate, replace) or other maintenance actions
(welding, grinding, riveting, straightening, facing, remachining, or
resurfacing) to restore serviceability to an item by correcting specific
damage, f a u l t , m a l f u n c t i o n , or failure in a part, subassembly, module
(component or assembly), end item, or system.
j. Overhaul. That maintenance effort (service/action) necessary to
restore an item to a completely serviceable/operational condition as
prescribed by maintenance standards (i.e., DMWR) in appropriate technic a l p u b l i c a t i o n s . Overhaul is normally the highest degree of maintenOverhaul does not normally return an item
ance performed by the Army.
to like new condition.
k . Rebuild.
Consists of those services/actions necessary for the
restoration of unserviceable equipment to a like new condition in
a c c o r d a n c e w i t h o r i g i n a l m a n u f a c t u r i n g s t a n d a r d s . Rebuild is the highest degree of materiel maintenance applied to Army equipment. The
rebuild operation includes the act of returning to zero those age
measurements (hours, miles, etc.) considered in classifying Army equipments/components.
D-3.
Column Entries
a . Column 1, Group Number. Column 1 lists group numbers, the purpose of which is to identify components, assemblies, subassemblies, and
modules with the next higher assembly.
b . Column 2, Component/Assembly. Column 2 contains the noun names
of components, assemblies, subassemblies, and modules for which maintenance is authorized.
c . Column 3, Maintenance Functions.
Column 3 lists the functions to
be performed on the item listed in column 2. When items are listed
without maintenance functions, it is solely for purpose of having the
group numbers in the MAC and RPSTL coincide.
d . Column 4, Maintenance Category.
Column 4 specified, by the
l i s t i n g o f a “ w o r k t i m e ” figure in the appropriate subcolumn(s), the
lowest level of maintenance authorized to perform the function listed in
column 3. T h i s f i g u r e r e p r e s e n t s t h e a c t i v e t i m e r e q u i r e d t o p e r f o r m
that maintenance function at the indicated category of maintenance. If
the number or complexity of the tasks within the listed maintenance
function vary at different maintenance categories, appropriate “work
time” figures will be shown for each category. The number of task-hours
specified by the “work time” figure represents the average time required
to restore an item (assembly, subassembly, component, module, end item
Page D-2
or system) to a serviceable condition under typical field operating
This time includes preparation time, troubleshooting time,
conditions.
and quality assurance/quality control time in addition to the time
required to perform the specific tasks identified for the maintenance
f u n c t i o n s a u t h o r i z e d i n t h e m a i n t e n a n c e a l l o c a t i o n c h a r t . Subcolumns of
column 4 are as follows:
C - Operator/Crew
O - Organizational
F - Direct Support
H - General Support
D - Depot
e.
Column 5, Tools and Equipment. Column 5 specifies by code, those
tom—on tool sets (not individual tools) and special tools, test, and
support equipment required to perform the designated function.
f . Column 6, Remarks. Column 6 contains an alphabetic code which
leads to the remark in section IV, Remarks, which is pertinent to the
item opposite the particular code.
D-4 .
Tool and Test Equipment Requirements (Section III)
a. Tool or Test Equipment Reference Code. The numbers in this
column coincide with the numbers used in the tools and equipment column
of the MAC. T h e n u m b e r s i n d i c a t e t h e a p p l i c a b l e t o o l o r t e s t e q u i p m e n t
for the maintenance functions.
b . Maintenance Category. The codes in this column indicate the
ma in t e n a n c e c a t e g o ry allocated the tool or test equipment.
c . Nomenclature.
This column lists the noun name and nomenclature
of the tools and test equipment required to perform the maintenance
functions.
d . National/NATO Stock Number.
This column lists the National/NATO
stock number of the specific tool or test equipment.
e . Tool Number. This column lists the manufacturer’s part number of
the tool followed by the Federal Supply Code for Manufacturers (5-digit)
in parentheses.
D-5.
Remarks (Section IV
a. Reference Code.
section II, column 6.
This code refers to the appropriate item in
b . Remarks. This column provides the required explanatory information necessary to clarify items appearing in section II.
Page D-3
SECTION II MAINTENANCE ALLOCATION CHART
Page D-4
SECTION III TOOL AND TEST EQUIPMENT REQUIREMENTS
FOR
GENERATOR, SIGNAL SG-1054/G
TOOL OR TEST
EQUIPMENMAINTENANOMENCLATURE
REF CODECATEGORY
NATIONAL/NATO
STOCK NUMBER
1
H,D
ANALYZER, DATA, TELEGPENDING
2
H,D
COUNTER, ELECTRONIC, 6625-00-044-3228
3
H,D
MULTIMETER, AN/USM-226625-00-999-7465
4
H,D
OSCILLOSCOPE, AN/USM-6625-00-106-9622
5
H,D
TELETYPEWRITER, TT-4 PENDING
6
H,D
TOOL KIT, TK-100/G
5180-00-605-0079
TOOLS AND TEST EQUIPMENT AVAILABLE TO THE OPERATOR BECAUSE
OF HIS/HER ASSIGNED MISSION.
PAGE D-5
TOOL NUMBER
APPENDIX F
REPAIR PARTS AND SPECIAL TOOLS LIST
Refer to Section 5, Parts List, for all maintenance parts.
Page F-1
By Order of the Secretary of the Army:
Official:
J. C. PENNINGTON
Major General, United States Army
The Adjutant General
E. C. MEYER
General, United States Army
Chief of Staff
THE METRIC SYSTEM AND EQUIVALENTS
PIN: 044286-000
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