TB 9-6625-003-35
NOTE
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
manufacturers manual for this TI.
NOTE
When indications specified in paragraphs 8 through 11 are not
within tolerance, perform the power supply check prior to
making adjustments. After adjustments are made, repeat
if all other parameters are within tolerance.
NOTE
Unless otherwise specified, all controls and control settings
refer to the TI.
7. Equipment Setup
a. Remove protective cover from TI only to make adjustments or to gain access to test
points. Replace immediately upon completion.
b. Connect TI to
autotransformer (A3), using adapter (B2).
c. Connect autotransformer to a
115-V ac
source and
adjust controls for a
115-V
output. If TI meter does not indicate on infinity mark on the 1 to 4 scale, turn mechanical
zero-adjustment screw (located below meter face) clockwise until pointer indicates on
infinity mark.
d. Position TI controls as listed in (1) through (3) below:
(1) SWR-DB switch to 0 (zero).
(2) Input selector switch to CRYSTAL.
(3) GAIN control fully clockwise.
e. Set TI power switch to ON and allow 10 minutes for warm up.
8. Sensitivity, Stability, and Noise
a. Performance Check
(1) Connect test oscillator (A9) 50-ohm output to TI INPUT, using cable (B3) with
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