TB 9-6625-1978-35
(4) Slowly increase signal generator level output until TI displays a stable count of
applied frequency. If signal generator level output exceeds -25 dBm, perform b below.
(6) Set signal generator frequency to 8 GHz and level output to 50 dBm.
(7) Slowly increase signal generator level output until TI displays a stable count of
applied frequency. If signal generator level output exceeds -30 dBm, perform b below.
(9) Set signal generator frequency to 18 GHz and level output to 50 dBm.
(10) Slowly increase signal generator level output until TI displays a stable count of
applied frequency. If signal generator level output exceeds -25 dBm, perform b below.
b. Adjustments
(1) Set signal generator frequency to 8 GHz and level output to -20 dBm.
(2) Slowly reduce signal generator level output while pressing RESET switch until
TI no longer accurately displays applied frequency.
(3) Adjust A203R22 (fig. 1) until TI again displays a stable indication of applied
frequency (R).
(4) Repeat (2) and (3) above until TI displays a stable indication of applied
frequency at -30 dBm or less input level.
NOTE
Optimum setting of A203R22 (fig. 1) provides stable display of
applied frequency at -30 dBm or less and an indication of 0
below the threshold level.
17. Power Supply
NOTE
Do not perform power supply check if all other parameters are
within tolerance.
a. Performance Check
(1) Connect multimeter between -5.2V test point (fig. 1) and chassis ground. If
multimeter does not indicate between -5.19 and -5.21 V dc, adjust A107R31 (fig. 1).
(2) Connect multimeter between -12V test point (fig. 1) and chassis ground.
If
multimeter does not indicate between -11.99 and -12.01 V dc, adjust A107R21 (fig. 1).
(3) Connect multimeter between +12V test point (fig. 1) and chassis ground. If
multimeter does not indicate between 11.99 and 12.01 V dc, adjust A107R7 (fig. 1).
(4) Connect multimeter between +5V test point (fig. 1) and chassis ground.
If
multimeter does not indicate between 4.99 and 5.01 V dc, adjust A107R15 (fig. 1).
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