TB 9-6625-2144-24
b. Items of equipment used in this procedure are referenced within the text by common
name and item identification number 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.
Additional maintenance information is contained in the manufacturers' manuals,
TM 11-6625-917-15 and TM 11-1247 (Series) 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. Connect TI to autotransformer.
b. Connect autotransformer to a 115 V ac source and adjust for a 115 V output.
c. Set POWER switch to ON and allow 45 minutes for equipment to warm-up and
stabilize.
NOTE
Knobs and dials may vary on some models.
d. Position controls as listed in (1) through (7) below:
(1) DBM dial to maximum attenuation.
(2) SIGNAL WIDTH control to MIN.
(3) PHASE control to MIN.
(4) POWER SET control fully ccw.
(5) SIGNAL FREQ control to midrange.
(6) TEST/TRAN/RECV switch to TRAN.
(7) Adjust ZERO/FINE control (METER BALANCE/FINE control on some
models) for SET ZERO indication on SET POWER meter (METER BALANCE control on
some models).
NOTE
It may be necessary to adjust R124 (fig. 1) to obtain SET
ZERO indication in (7) above for the TS-147 ( ).