TB 9-6625-2179-24
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.
Additional maintenance information is contained in TM 11-6625-3146-14 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.
b. Insure POWER SUPPLY switch (rear panel of TI) is set for 105 to 120 V operation.
c. Connect TI to 115 V ac power source.
d. Set SUPPLY switch to ON and allow at least 5 minutes for warm-up and
stabilization.
e. Press CAL key. When TI self-check is complete, FREQUENCY display will
indicate PASS (momentarily) and then all dashes (- - - - - -).
NOTE
If TI indicates anything other than all dashes (-), or PASS in e
above, repair is required before continuing.
NOTE
In all references in this procedure to TI keys that have more
than one function, the key is to be pressed to light the indicator
of the function called for in the text.
8. Internal Oscillator
a. Performance Check
(1) Connect STD FREQ IN-OUT (rear panel of TI) to frequency counter. If
frequency counter does not read 10 MHz 5 Hz, adjust STD FREQ ADJ (rear panel of TI).
(2) W a i t 1 h o u r ; t h e n o b s e r v e f r e q u e n c y c o u n t e r . I f t h e i n d i c a t i o n i s n o t
1 0 M H z 5 Hz, adjust STD FREQ ADJ (rear panel of TI).
b. Adjustments. No further adjustments can be made.
9. Frequency Accuracy
a. Performance Check
(1) Connect equipment as shown in figure 1.
