12-23. OPERATIONAL CHECK. continued
Step 9. TRANSMIT DIGITAL DATA TEST. Continued
*: This function has been eliminated.
d. Change test setup as follows:
d. No response.
REF RT AND RCU:
(see Response g.)
TRIG LEVEL: MID-RANGE
4000 Hz (3990 to 4010 Hz)
10 v p-p (9.5 to 10.5 v p-p)
e. Set test adapter:
Observe scope CH 1 for 9.5 to 10.5 V p-p
square wave display.
f. Adjust fine frequency control on Function
Generator until scope CH 1 is locked-up.
e. 9.5 to 10.5 V p-p square wave is
displayed on CH 1. If not, go to chart 34.
If data rate could not be scrolled to 16000,
the control module (19A2) is bad.
f. Adjustment is successful. If not, the
COMSEC module (19A11) is bad.