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TM 11-5820-890-30-5
2-29. OPERATIONAL CHECK. Continued
Step 15. RECEIVE CHECK (CT, DIGITAL DATA).
Action
Response
a.
Remove UUT RT data rate adapter (1A15).
a. No response.
Set TRIGGER:
CONT
CAL:
FCTN GEN
FREQ: 8000 Hz (7990 to 8010 Hz)
LEVEL: 10 V p-p (9.5 to 10.5 V p-p)
FUNCTION:
SQUARE.
b. Set CAL:
MOD GEN
b. No response.
FREQ: 16000 Hz (15990 to 16110 Hz)
LEVEL: 10 V p-p (9.5 to 10.5 V p-p)
FUNCTION:
SQUARE
TRIGGER:
EXT
TRIG LEVEL: MID-RANGE
Set CAL:
OFF.
Set REF RT and UUT RT: DATA: 16K.
c.
Set MOD GEN: ON
c.
Scope chan A displays a 9 to 10 V p-p,
LOGIC
1
7990 to 8010 Hz square wave. If not,
STIMULUS: 6
go to chart 31.
RESPONSE: 1.
Set PTT: UUT.
Set PTT: REF.
d. Set RESPONSE: 2.
d. Scope chan A displays a 9 to 10 V p-p,
Set PTT: REF.
15990 to 16010 Hz square wave. If not,
go to chart 31.
e. Reinstall UUT RT data rate adapter (1A15).
e. No response.
Step 16. TRANSMIT CHECK (SC, AD2).
Action
Response
a.
Set LOGIC:
OFF
a.
No response.
MOD GEN:
OFF.
b. Set CAL:
FCTN GEN
b. No response.
TRIGGER:
CONT
FREQ: 2400 Hz (2390 to 2410 Hz)
LEVEL: 120 mV p-p (100 to 140 mV p-p)
FUNCTION:
SINE.
Set CAL:
OFF.
c. Set REF RT and UUT RT: DATA: AD2.
c.
No response.
Set STIMULUS: 1
RESPONSE: 3
BASEBAND: 4.
d.
Set PTT: UUT.
d. Scope chan A displays a slightly distorted
1.5 to 2.5 V p-p, 2390 to 2410 Hz sine
wave. If not, go to chart 33.
e.
Set PTT: OFF.
e. No response.
2-42
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