TB 9-6625-1978-24
(12) Set signal generator frequency to 10 MHz and level output to 20 dBm. TI
will display a stable count of applied frequency.
(13) Adjust signal generator frequency from 10 to 300 MHz. TI will display a stable
count of applied frequency.
b. Adjustments. No adjustments can be made.
Band II Input Sensitivity
a. Performance Check
(1) Set BAND SELECT switch to 100 MHz - 850 MHz.
(2) Connect signal generator RF Output to TI 100 MHz - 850 MHz 50 OHM input.
(3) Set signal generator frequency to 100 MHz and level output to 50 dBm.
(4) Slowly increase signal generator level output until TI displays a stable count
of applied frequency. If signal generator level output exceeds -15 dBm, perform b below.
(5) Repeat (3) and (4) above with signal generator frequency set to 150 MHz.
(6) Set signal generator frequency to 850 MHz 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 -20 dBm and no adjustment
was previously made, perform b below.
b. Adjustments
(1) Set signal generator frequency to 100 MHz and level output to -15 dBm.
(2) Adjust A109R41 (fig. 1) until TI displays a stable count of applied frequency (R).
(3) Slowly reduce signal generator level output until TI display becomes erratic.
(4) Readjust A109R41 (fig. 1) until TI indication drops to all zeros.
Band III Input Sensitivity
a. Performance Check
(1) Set BAND SELECT switch to 825 MHz - 18 GHz.
(2) Connect signal generator RF Output to TI 825 MHz - 18 GHz 50 OHM input.
(3) Set signal generator frequency to 825 MHz and level output to 50 dBm.
(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.
(5) Repeat (3) and (4) above with signal generator frequency set to 1.1 GHz.
(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.
(8) Repeat (6) and (7) above with signal generator frequency set to 12.4 GHz.
