TB 9-6625-2171-24
(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.)
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).
10. Frequency
a. Performance Check
(1) Connect equipment as shown in figure 2.
(2) Set MODE switch to FREQ position.
(3) Adjust synthesized signal generator and RF power amplifier levels for
approximately 5 W as indicated on RF power amplifier meter and adjust synthesized signal
frequency display will indicate between 29.998 and 30.002 MHz.
(4) Repeat technique of (3) above for TI display and synthesized signal generator
frequency display indications listed in table 4. Synthesized signal generator frequency
display will indicate within limits specified.
b. Adjustments. No adjustments can be made.