TB 9-6625-2043-35
(12) Reduce function/arbitrary generator output by 10 dB. If TI does not indicate 10
0.2 dB difference from value recorded in (11) above, perform b (4) below.
b. Adjustments
(1) Adjust R610 (fig. 2) for a +10 dBm indication on TI meter (R).
(2) Adjust R624 (fig. 2) for a 40 dBm indication on TI meter (R).
(3) Adjust R610 (fig. 2) for a 0 dBm indication on TI meter (R).
(4) Adjust R616 (fig. 2) until TI indicates a 10 dB difference from value recorded in
a (11) above (R).
14. RF Calibration Accuracy
a. Performance Check
(1) Connect equipment as shown in figure 4.
(7 GHz for model 41-4A).
(3) Determine calibration factor of thermistor mount (p/o power meter) at 10 GHz (7
GHz for model 41-4A) from calibration data label.
(4) Set CALIB FACTOR control of power meter to appropriate value.
(5) Determine calibration factor of TI power detector from calibration chart attached
to detector. Set CAL FACTOR control to this value
(6) Zero TI meter as described in paragraph 7 h above.
(7) Set FULL SCALE switch to 0 dBm and OFF-PWR-dBm switch to dBm.
