TB 9-6625-2151-35
(2) Set calibrator for a -3.9 dBm, 300 Hz output. If TI left display does not indicate -
30 dBm, perform b(l) through (10) below.
(3) Set calibrator frequency to 1000 Hz. If TI left display does not indicate 0 dBm,
perform b(l) through (10) below.
(4) Set calibrator frequency to 2300 Hz. If TI left display does not indicate -10 dBm,
perform b(l) through (10) below.
(5) Press DISPLAY key to select TRMT. If right display does not indicate between
99 and 101, perform b(11) below.
(6) Vary OUTPUT LEVEL control to obtain a left display indication between -12
and -1 dBm. Right display indication will not change by more than 1 P/AR unit.
b. Adjustments
(1) Press calibrator RESET key and disconnect from TI.
(2) Connect left TRMT/RCV 310 to right RCV/TRMT 310.
(3) Press MEASUREMENT MEAS key to select LEVEL FREQUENCY.
(4) Press ←, STEP UP, STEP DOWN, and → keys until TI right display indicates
1300 Hz. Adjust OUTPUT LEVEL control until left display indicates 0.0 dBm.
(5) Connect oscilloscope CH 1 to TP 15 pin 2 (fig. 1).
(6) Connect oscilloscope CH 2 to TP 15 pin 7 (fig. 1).
(7) Set oscilloscope controls as necessary to measure phase difference between
signals on CH 1 and CH 2.
(8) Adjust R153 PAR PHASE 1 (fig. 1) to obtain a 0 degree phase difference
(9) Connect oscilloscope CH 1 to TP15 pin 8 (fig. 1).
(10) Adjust R175 PAR PHASE 2 (fig. 1) to obtain a 0 degree phase difference
(11) Adjust Rl86 PAR DET (fig. 1) until TI right display indicates 100 (R).
NOTE
Do not perform power supply check if all other parameters are
within tolerance.
a. Performance Check
(1) Connect multimeter Input HI to JU+5 (fig. 4) and LO to ground. If multimeter
does not indicate between 4.8 and 5.2 V dc, perform b(l) below.
(2) Connect multimeter Input HI to JU+14 (fig. 4). If multimeter does not indicate
between 13.8 and 14.2 V dc, perform b(2) below.
PIN: 059612-001