TM 11-5841-287-30
Table 3-4. Encoder Circut Cards to be Tested
3-27. Testing Analog-Digital Converter 2A2
Circuit
Reference
Reference
a. Test Setup. Connect the equipment as shown
cord
designation
paragraph
Analog-digital
2A2
3-27
b. Preliminary Control Settings Prior to testing the
converter
circuit card, set the equipment controls as follows:
FT
accumulator
2A3/2A4
3-28
Control
Setting
memory
Control Interface unit
MT
accumulator
2A512A6
3-29
POWER ON/OFF
OFF
memory
MODE SELECT
POWER OFF
Videocontrol
2A7
3-30
Digital tester
Videomultiplexer
2A9
3-31
POWER
Down (off)
MPU/tlmmg
2A11
3-32
UUT POWER
Down (off)
Output buffer
2A12
3-33
TEST RATE PER SEC
1M
Power fault detector
2A13
3-34
NUMBER OF TESTS
2M
Output memory
2A14
3-35
DISPLAY
PROBE
ADAS control
2A16
3-36
PROBETHRESHOLD
2V
Video interface
2A17
3-37
c. Test Procedure. Perform the following steps in
b. Test Equipment Required. Test equipment
the sequence given. Change equipment control settings
required for encoder circuit card testing is listed in table
only when instructed in the test procedure.
(1) Insert the encoder extender card into the
MODULE TEST circuit card rack connector J1 on the
Table 3-5. Test Equipment Required For Circuit Card
control interface unit.
Testing
(2) Insert 2A2 card into the extender card.
Test Equipment
Common name
(3) Connect +5 V power supply positive lead to
Test Set, Electronic Systems
Control Interface unit
pin 85 on extender card and negative lead to pin 86.
TS-3796/UKM-4
Using the digital voltmeter, adjust power supply for 0.28
Systems Test Set, Electronic
Digital tester
+ 0.01 V dc.
Systems, ANFUYM-7
Power Supply PP-3940/G
Power supply
(4) Insert A2 program card (SM-A-942405) into
Oscilloscope AN/USM-281C
the card reader slot on the digital tester.
Digital Voltmeter AN/GSM-64B
Digital voltmeter (DVM)
(5) On the control interface unit, set the POWER
Extender Card, Video Encoder
Extender card
ON/OFF switch to ON and the MODE SELECT switch to
SM-D-94243-1
MODULE TEST ENC. Verify that the MODE/ POWER
Data recording-programmed
MODULE TEST ON green indicator lamp is illuminated
magnetic cards as follows
NOTE
SM-A-942405
A2 program Card
The MODE/POWER SHORT red indicator lamp
SM-A-942355
A31A4 program card
SM-A-942360
A51A6 program card
will be illuminated at this time, but will be
SM-A-942410-1
A7programcardno 1
extinguished when the digital tester UUT
SM-A-942410-2
A7 program card no 2
POWER switch is set to the ON position in the
SM-A-942365
A9 program card
following step.
SM-A-942385
All program card
(6) On the digital tester, set the POWER and
SM-A-942445-1
A12 program card no 1
UUT POWER switches to the on positions (up). Verify
SM-A-942445-2
A12 program card no 2
that the red indicator lamps for these switches are
SM-A-942445-3
A12 program card no 3
illuminated and the MODE/POWER SHORT lamp is off.
SM-A-942445-4
A12 program card no 4
SM-A-942445-5
A12 program card no 5
(7) On the digital tester, load the program on the
SM-A-942465-1
A13 program card no 1
A2 program card into the digital tester memory by
SM-A-942465-2
A13 program card no 2
pressing the PROGRAM ENTER momentary switch to
SM-A-942465-3
A13 program card no 3
the down position
SM-A-942370-1
A14 program card no 1
NOTE
SM-A-942370-2
A14 program card no 2
The PROGRAM ENTER red indicator lamp will
SM-A-942450-1
A16 program card no 1
be illuminated during the program enter period.
SM-A-942450-2
A16 program card no 2
(8) Verify that the READY/ERROR white
SM-A-942450-3
A16 program card no 3
SM-A-942450-4
A16 program card no 4
indicator lamp on the digital tester illuminates when the
SM-A-942450-5
A16 program card no 5
program has been entered (9) Depress the CONT TEST
SM-A-942440-1
A17 program card no 1
switch on the digital tester (10) Connect the positive lead
SM-A-942440-2
A17 program card no 2
of the digital volt-meter to test point Jl-1 and the negative
SM-A-942440-3
A17 program card no 3
lead to J1-22 (fig 3-9)
Change 1 3-32
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