TB 9-6625-2340-24
(3) Remove TI top cover.
(4) Remove cables attached to the A3 digital storage cage.
(5) Remove A3 digital storage cage cover.
(6) Reconnect cables removed in (4) above.
(7) Set TI LINE switch to ON.
(8) Press TI keys as listed in (a) through (f) below:
2-22 GHz.
(a)
CENTER FREQUENCY, 7.6, MHz.
(b)
FREQUENCY SPAN, 0, Hz.
(c)
REFERENCE LEVEL, 10, +dBm.
(d)
RES BW, 10, kHz.
(e)
SCALE LIN.
(f)
(9) Connect multimeter HI to A4A1TP1 (fig. 21) and multimeter LO to
A3A9TP1 (fig. 22).
(10) Adjust A4A2R79 (fig. 24) for 0.0000 0.0005 Vdc.
(11) Press TI SCALE LOG key.
OUTPUT.
(12) Connect TI RF INPUT to synthesizer/level generator 50
(13) Set synthesizer/level generator for an output frequency of 7.6 MHz at an output
level of 5 dBm.
(14) Adjust A4A3C55 (fig. 25) for a maximum multimeter indication.
NOTE
If A4A3C55 is at an extreme of its adjustment range (fully
meshed or unmeshed) then TI must be repaired.
(15) Short A4A3TP7 to A4A3TP8 (fig. 25) and record multimeter indication.
(16) Remove short from between A4A3TP7 and A4A3TP8 (fig. 25).
(17) Adjust A4A3R67 (fig. 25) for a multimeter indication the same as that recorded
in (15) above 0.0005 V dc (R). If TI cannot be adjusted to meet this tolerance then TI must
be repaired.
(18) Press TI SCALE LIN key.
(19) Adjust synthesizer/level generator output level for a multimeter indication of
1.000 0.002 V dc.
(20) Press TI SCALE LOG key.
(21) Decrease synthesizer/level generator output level by 50 dBm.
(22) Adjust A4A2R91 (fig. 24) for a multimeter indication of 0.500 0.001 V dc (R).
(23) Increase synthesizer/level generator output level by 50 dBm.
(24) Adjust A4A2R61 (fig. 24) for a multimeter indication of 1.000 0.001 V dc (R). If
TI cannot be adjusted to meet this tolerance then TI must be repaired.
(25) Press TI SCALE LIN key.
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