TB 9-6625-2155-35
HIGH VOLTAGE is used or exposed during the performance of
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
a. Remove TI from protective cover only as necessary to make adjustments. Replace
cover after completing the adjustments.
NOTE
For the remainder of this procedure the 68369NV connected to
the measuring receiver will be called the local oscillator.
NOTE
Many indications, such as MESSAGE, ∆F, SWEEP FREQ
START, etc., will only appear when the appropriate entry
pushbutton is pressed and held in the IN position.
b. Connect TI to a 115 V ac power source.
c. Set LINE switch to ON and allow a 2 hour warm-up and stabilization.
d. Connect FREQUENCY STD INT connector of TI to
SIG INPUT of
frequency
difference meter. Set FREQUENCY STANDARD INT/EXT SWITCH to INT.
e. Connect 1 MHz output of
GPS time/frequency workstation to
REF INPUT of the
frequency difference meter.
f. Adjust FREQ adjust A3A8
(fig. 1)
for minimum
frequency difference meter
indication.
g. Verify
oscillator drift is
less than 1 part in 10
-8 per 10s.