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TM 11-5820-890-30-5
2-29. OPERATIONAL CHECK. Continued
Step 19. RECEIVER SENSITIVITY.
Action
Response
a. Move cable from UUT RT RXMT connector
a.
No response.
back to UUT RT AUD/DATA connector.
b. Set REF RT: FCTN: OFF.
b. No response.
Set UUT RT: FCTN: SQ OFF.
Set UUT RT: CHAN: 1.
Set SIGNAL GENERATOR:
FREQ: 37.8750 MHz
(37.8748 to 37.8752 MHz)
LEVEL: -96 dBm
(-96.5 to -95.5 dBm)
FM MOD: INT
DEV: 6.5 kHz.
c. Set RF SWITCH: 4.
c. Scope chan A displays a 14 to 20 V p-p,
Set TEST EQPT SELECTOR: SCOPE.
1 kHz sine wave with some noise that
RESPONSE: 1
changes when RF is OFF. If not, go to
LOAD:
1.
chart 36.
d. Increase signal generator output to
d. Scope chan A displays same sine wave as
-86 dBm.
for step 19 c, but without noise. If not, go
to chart 37.
e. Repeat steps 19 a thru d for all channels.
e. Same as for steps 19 c and d.
Set signal generator FREQ to RT display for
each channel.
Step 20. HOLDING BATTERY CHECK.
Action
Response
a. Set UUT RT: FCTN: OFF.
a. RT display turns off. If not, the switch flex
assembly (1A16A1W2) is bad.
b. Set 13 V: OFF and wait 30 seconds.
b. No response.
c. Set 13 V: ON.
c. No response.
d. Set UUT RT:
d. RT displays ID for hopset loaded into
FCTN : SQ ON
channel 2. If not, go to chart 38.
CHAN: 2
MODE: FH.
e. Operational Check is complete.
2-44
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