TB 9-6625-2171-24
Table 4. Frequency Accuracy
Test instrument
display
indications
indications
(MHz)
(MHz)
Min
Max
40.0
39.998
40.002
50.0
49.998
50.002
60.0
59.998
60.002
70.0
69.998
70.002
80.0
79.998
80.002
11. Final Procedure
a. Deenergize and disconnect all equipment and reinstall protective cover on TI.
b. Annotate and affix DA label/form in accordance with TB 750-25.
CALIBRATION PROCESS FOR
RECEIVER TEST SET, AN/ARM-186 AND COLLINS, MODEL 972Q-4
12. Preliminary Instructions
a. The instructions outlined in paragraphs 12 and 13 are preparatory to the calibration
process. Personnel should become familiar with the entire bulletin before beginning the
calibration.
b. Items of equipment and accessories used in this procedure are referenced within the
text by common name as listed in table 2 and 3.
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 TM 11-6625-2976-40 for this TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.
13. 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 TI from case.
b. Remove both batteries from TI.
c. Position controls as listed in (1) through (11) below: