TB 9-6625-1978-24
8. Input Sensitivity
a. Performance Check
(1) Connect signal generator RF Output to TI BAND A 300-950 MHz input.
(2) Set signal generator frequency to 300 MHz and level output to 50 dBm.
(3) Slowly increase signal generator level output until TI displays a stable count of
applied frequency. Signal generator level output will not exceed -10 dBm.
(4) Repeat (2) and (3) above with signal generator frequency set to 500, 700, and
950 MHz.
(5) Disconnect signal generator RF Output from TI.
(6) Set TI BAND select switch to B 18 GHz.
(7) Connect signal generator RF Output to TI BAND B 925 MHz 18 GHz input.
(8) Set signal generator frequency to 925 MHz and level output to 50 dBm.
(9) Slowly increase signal generator level output until TI displays a stable count of
applied frequency. Signal generator level output will not exceed -10 dBm.
(10) Repeat (8) and (9) above with signal generator frequency set to 1, 5, and 10 GHz.
(11) Set signal generator frequency to 15 GHz and level output to 50 dBm.
(12) Slowly increase signal generator level output until TI displays a stable count of
applied frequency. Signal generator level output will not exceed -5 dBm.
(13) Repeat (11) and (12) above with signal generator frequency set to 18 GHz.
b. Adjustments. No adjustments can be made.
9. Power Supply
a. Performance Check
NOTE
Do not perform power supply check if all other parameters are
within tolerance.
(1) 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).
(2) 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).
(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 A107R21 (fig. 1).
(4) Connect multimeter between -5V test point (fig. 1) and chassis ground.
If
multimeter does not indicate between -5.19 and -5.21 V dc, adjust A107R31 (fig. 1).