TB 9-6625-2331-35
b. Items of equipment used in this procedure are referenced within the text by
common name as listed in table 2.
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
Adjustments required to calibrate the TI are included in this procedure. Additional
maintenance information is contained in the manufacturer's manual for this TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.
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.
a. Remove protective cover from TI only when necessary to make adjustments.
Replace cover after completing the adjustments.
adjust for 115 V ac output.
c. Set POWER switch to ON and allow at least 1 hour for stabilization. If TI has
been disconnected from line power for more than 48 hours, allow at least 48 hours for
warmup before beginning calibration.
d. Disconnect any connections from inputs A and B.
e. Press keys as listed in (1) through (3) below:
(1) AUX MENU.
(2) SELECT/SET ? ? to select CAL HYSE.
(3) ENTER.
8. Time Base Stability
a. Performance Check
(1) Connect time/frequency workstation OUTPUT 1 MHz to frequency difference
meter REF INPUT.
(2) Connect TI 10 MHz OUT (rear panel) to frequency difference meter SIG
INPUT.
(3) Adjust R4 (fig. 1) reference adjust for minimum difference indication on
frequency difference meter.
