TB 9-6625-2171-35
(2)
Set MODE switch to FWD PWR position.
(3)
Energize all equipment and allow at least 15 minutes for warm-up.
(4)
Compute power meter reading that corresponds to 40 W, using power
standard assembly output calibration factor at 50 MHz. (See power standard assembly test
report.)
(5)
Adjust signal generator for a frequency of 50 MHz and adjust signal
generator output level to within RF power amplifier input operating range.
(6)
Press PUSH-TO-TEST pushbutton and adjust RF power amplifier gain
control for a 40.0 W indication on TI display. If power meter does not indicate within 20
percent of reading computed in (4) above, perform b(1) and (2) below.
(7)
Repeat technique of (4) through (6) above for 1.0 W (3.0 W for TIs with S/N 1
through 634), except perform b(1) and (3) below at 1.0 W only.
(8)
Reverse TI RADIO and ANT connections.
(9)
Set MODE switch to RVS PWR position and repeat (4) through (7) above at
20.0 and 1.0 W (20.0 and 3.0 W for TIs with S/N 1 through 634), except perform b(4) and (5)
below.
b. Adjustments
(1)
Adjust RF power amplifier for power meter reading computed in a(4) above.
(2)
Adjust R9 (forward) (fig. 1) until TI display indicates 40.0 W (R).
(3)
Adjust R7 (forward) (fig. 1) until TI display indicated 1.0 W. Repeat (1)
through (3) above as necessary to obtain best in-tolerance conditions throughout the range
of instrument.
(4)
Adjust RF power amplifier for power meter reading computed in a(4) above.
(5)
Adjust R10 (REVERSE) (fig. 1) until TI display indicates 20.0 W (R).
a. Performance Check
(1)
(2)
Set MODE switch to FREQ position.
(3)
Adjust signal generator and RF power amplifier levels for approximately 5 W
as indicated on RF power amplifier meter and adjust signal generator frequency until TI
and 30.002 MHz.
(4)
display indications listed in table 4. Signal generator frequency display will indicate within
limits specified.
b. Adjustments. No adjustments can be made.