TB 9-6625-2340-24
7. Equipment Setup
WARNING
HIGH VOLTAGE is used or exposed during the performance of
this calibration.
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.
CAUTION
Before connecting TI to power source, make sure TI is set to the
power source line voltage as shown on rear of TI.
a. Connect TI to 115 V ac power source.
b. Press TI POWER switch to ON and allow at least 30 minutes for TI to warm-up
and stabilize.
8. Frequency Stability
a. Performance Check
(1) Position TI on its right side.
(2) Remove cable between FREQ REFERENCE INT and EXT connectors.
(3) Set rear panel FREQ REFERENCE switch to INT.
(4) Connect TI FREQ REFERENCE INT to time/frequency workstation TIME /
FREQUENCY INPUT.
(5) Remove TI bottom cover.
NOTE
The TI must be warmed up for at least 48 hours before this test
is performed.
(6) Remove A22 adjustment cover screws.
(7) Adjust A22 (fig. 1) for a minimum indication on the time/frequency workstation.
(8) Check the drift after 24 hours. The drift will be 1 x 10-9.
Figure 1. Frequency adjust.