TM 11-5821-333-30
6-20. OPERATIONAL CHECK. Continued
ACTION
RESPONSE
Step 18. DATA RATE ADAPTER TEST
Presets:
SET TEST ADAPTER–
SET FUNCTION GENERATOR–
S1: OFF
FUNCTION: SQUARE
S5: 4
FREQ: 16 kHz (14400 to 17600 Hz)
TAKE CTRL (S9): RT
LEVEL: 5 VP-P (4.5 to 5.5 VP-P)
TEST EQPT INPUT (S14): INTL
DC: OFF
CONNECT: -HEADSET TO J9 USING TEST CABLE W9
-FUNCTION GENERATOR OUTPUT TO J18
-EXT PROBE TO J8
-SCOPE CHANNEL 1 TO J14
a. Set test adapter DC switch to ON while listen-
s. There should be a short two tone beep. There
ing to headset.
should not be a 1200 Hz continuous tone, If
what is heard is different, go to chart 17.
b. Set test adapter–
b. No response.
S5: 3
S6: 3
PTT (S13) : REF
TEST EQPT INPUT (S14) : EXT
TEST EQUIPMENT SELECTOR (S15) : SCOPE
c. Use ext probe to check J7-F.
d. Set test adapter–
S5: 7
S6: 7
SQ/CLK (S11): ON
e. Use ext probe to check J7-F,
c. Scope channel 1 displays a digital data signal.
If not, go to chart 18.
d. No response.
e. Scope channel 1 displays digital data signal.
If not, go to chart 19.
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