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 c. Procedure.
Control settings
step
Normal Indication
Test equipment
Procedure
Equipment under test
AN/TPM-25A
1
a. Connect system timing setup as
MODE: 1
a. None.
POWER: ON
shown in figure 5.2-1.
FUNCTION: SYSTEM
MEASUREMENT FUNCTION SEL:
b. On AN/USM-281A, observe
b. None.
PWR
positive going prf pulse from
ISLS: OFF
REPLIES MODULATION SEL:
A5TP5 on A INPUT, and the
SIF
delayed prf pulse from the
PUSH TO TEST: lock
REPLIES SUB PULSE SEL: OFF
28 VDC-115
AN/UPM-15A on B INPUT.
RANGE DELAY SEL:0100
VAC OFF: 115 VAC
c. Adjust AN/UPM-15A PULSE
c. None.
PRT SEL (USEC) IMMATERIAL
DELAY to position the delayed
TRIG SEL INT DCD/EXT EXT
prf pulse approximately .5 ma
SIG GEN FUNCTION: FIXED
before the trailing edge of the prf
FREQ
pulse.
AN/USM-281A
d. Continue adjustment of PULSE
d. ACCEPT LAMP IS ON.
POWER ON
DELAY as required until the
Sweep display switch
transponder test set ACCEPT
MAIN
lamp is on solidly.
DELAYED TIME/DIV: OFF
MAIN TIME/DIV: 1 MSEC
INT AUTO/EXT/EXT 10: AUTO
EXT
10/EXT/INTL: EXT
MAIN - SLOPE + : + DIV
DELAY: Immaterial DISPLAY:
ALT
A AND B VOLTS/DIV: 5
A AND B POLARITY: + UP
A AND B AC/GND/DC: DC
INT AU'TO/EXT/EXT 10: AUTO
EXT 10/EXT/INT/ILINE: EXT
MAIN SLOPE +:+
DIV DELAY 280
DISPLAY. ALTERNATE
MODE: 1
A AND B VOLTS/DIV: 2
FUNCTION: SYSTEM
A AND B POLARITY: + UP
CODE: ANY
A AND B AC/GND/DC: DC
POWER: 115 VAC
PRESS TO TEST LOCK
2
AN/TPM-25A
a. Turn off transponder test set and
a. None.
POWER: ON
connect equipment as shown in
figure 5.2-2, transmitter
MEASUREMENT FUNCTION
frequency test setup.
SEL: FREQ
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