TM 11-5841-287-30
the test is in progress.
3-31.
Testing Video Multiplexer 2A9
(8) Initiate a second test by repeating step
a. Test Setup. Connect the equipment as
(7) above Verify that the green PASS indicator lamp on
shown in figure 3-10
the digital tester illuminates at the completion of the
b. Preliminary Control Settings.
Prior to
second test
testing the circuit card, set the equipment controls as
(9) Set the POWER switches on the
follows.
equipment to their off positions Remove the circuit card
Control
Setting
Control interface unit
under test and the program card from the test setup
POWER ON/OFF
OFF
MODE SELECT
POWER OFF
3-32.
Testing MPU/Timing 2A11
Digital tester
a. Test Setup Connect the equipment as
POWER
Down (off)
shown in figure 3-8
WT POWER
Down (off)
b. Preliminary Control Settings Prior to testing
TEST RATE PER SEC
100K
the circuit card, set the equipment controls as follows
NUMBER OF TESTS
1M
Control
Setting
DISPLAY
PASS/FAIL
Control interface unit
PROBE THRESHOLD
2V
POWER ON/OFF
OFF
c. Test Procedure.
Perform the following
MODE SELECT
POWER OFF
steps In the sequence given.
Change equipment
Digital tester
controls only when instructed in the test procedure
POWER
Down (off)
(1) Verify that cable W3 is connected as
UUT POWER
Down (off)
shown in figure 3-10 and insert the circuit card to be
TEST RATE PER SEC
2M
tested into the MODULE TEST circuit card rack
NUMBER OF TESTS
20M
connector J1 on the control interface unit
DISPLAY
PASS/FAIL
(2) Insert A9 program card (SM-A-
PROBETHRESHOLD
2V
c. Test Procedure Perform the following steps
942365) into the card reader slot on the digital tester
in the sequence given Change equipment control
(3) On the control interface unit, set the
settings only when instructed in the test procedure
POWER ON/OFF switch to ON and the MODE SELECT
(1) Insert the circuit card to be tested into
switch to MODULE TEST ENC Verify that the
the MODULE TEST circuit card rack connector J2 on the
MODE/POWER MODULE TEST ON green indicator
control interface unit
lamp is illuminated
(2) Insert All program card (SM-A-942385)
NOTE
into the card reader slot on the digital tester.
The MODE/POWER SHORT red
(3) On the control interface unit, set the
indicator lamp will be illuminated at this
POWER ON/OFF switch to ON and the MODE SELECT
time, but will be extinguished when the
switch to MODULE TEST ENC.
Verify that the
digital tester UUT POWER switch is set
MODE/POWER MODULE TEST ON green indicator
to the on position in the following step
lamp is illuminated
(4) On the digital tester, set the POWER
NOTE
and UUT POWER switches to the on positions (up)
The MODE/POWER SHORT red
Verify that the red indicator lamps for these switches are
indicator lamp will be illuminated at this
illuminated and the MODE/POWER SHORT lamp is off
time, but will be extinguished when the
(5) On the digital tester, load the program
digital tester UUT POWER switch is set
on the A9 program card into the digital tester memory by
to the on position in the following step
pressing the PROGRAM ENTER momentary switch to
(4) On the digital tester, set the POWER
the down position.
and UUT POWER switches to the on positions (up)
NOTE
Verify that the red indicator lamps for these switches are
The PROGRAM ENTER red indicator
illuminated and the MODE/POWER SHORT lamp is off.
lamp will be illuminated during the
(5) On the digital tester, load the program
program enter period
on the All program card into the digital tester memory by
(6) Verify that the READY/ERROR white
pressing the PROGRAM ENTER momentary switch to
indicator lamp on the digital tester illuminates when the
the down position
program has been entered
NOTE
(7) Initiate a complete test sequence by
The PROGRAM ENTER red indicator
pressing either one of the TEST momentary switches to
lamp will be illuminated during the
the down position
program enter period.
NOTE
The TEST red indicator lamp for the
switch selected will be illuminated while
3-39
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