TB 9-6625-1947-35
6. Preliminary
instructions
a. The
instructions outlined in
paragraphs 6 and
7 are preparatory to the
calibration
process. Personnel should become familiar with the entire bulletin before beginning the
calibration.
b. Items of equipment used in this procedure are referenced within the text by common
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. When indications specified in
paragraphs 8 through 13 are not within
tolerance,
perform the power supply check prior to making adjustments. After adjustments are made,
repeat paragraphs 8 through 13. Do not perform power supply check if all other
parameters are within tolerance.
e. 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. Rotate AMPLITUDE control fully ccw.
b. Set 115/230 slide switch (rear panel) to 115.
d. Connect autotransformer to a
115 V ac
source and
adjust for a
115 V
output.
e. Set LINE switch to ON and allow 30 minutes for TI to warm-up and stabilize.
f. Set LINE switch to off (down) and wait 30 seconds.
g. Insert pointed object into TI meter recess on adjustment wheel and rotate wheel
until meter pointer is exactly over -1 dBm mark.
8. Frequency Accuracy,
Stability, and
Range
a. Performance Check
(1) Connect frequency counter to TI COUNTER OUTPUT connector (rear panel),
using 50 Ω feed-through termination.