TB 9-6625-2215-35
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.
WARNING
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. Mount TD-1209/U (Hewlett-Packard, Model 5300A) measuring system on TD-
1211/U (Hewlett-Packard, Model 5302A) 50 MHz universal counter.
b. Connect TI measuring system to autotransformer and connect autotransformer to a
115 V ac source. Adjust autotransformer output for 115 V.
c. Adjust TI measuring system SAMPLE RATE control cw to ON position and allow 1
hour for warm-up.
a. Performance Check
(1) Set time/frequency workstation for 1 MHz output and connect to REF INPUT of
frequency difference meter.
(2) Connect OSC jack on rear of TI measuring system to SIG INPUT jack of
frequency difference meter.
(3) Adjust OSC ADJ C7 (rear of TI measuring system) for minimum difference
indication on frequency meter. Frequency difference meter will indicate less than 3 parts
in 107.
(4) While monitoring frequency difference meter indication, vary output of
within l part in 107.
(5) Adjust output of autotransformer to 115 V.
b. Adjustments. No further adjustments can be made.