S-BAND TRANSMITTER ANTENNA REFLECTED POWER CALIBRATION WORK SHEET

DATE______________ NAME____________________

Channel A

Full scale dBm (from above) 70 dBm (10 kW )

- splitter attenuation Channel A (3dB nom.) _______dB (date last measured) _________

-Attenuator 1A (if used) ________dB (date last measured)_________

-Attenuator 2A (if used) ________dB (date last measured)_________

-(Attenuator 3A (if used) _______dB (date last measured)_________

TOTAL .............................................. ________dBm Calculated CW Calibration Sig. Level	(nominal level 7.1 dB - see note below)

Note: the control program's voltageto-power look-up table is based on a calibration signal level of 7.1 dBm. Adjust the attenuator cascade so that the Calculated CW Calibration Sig. Level is 7.1 +/-1 dBm.

Inject this cw cal signal at 2380 MHz into the Filter/Limiter/Detector/cable chain and adjust the Card A1 gain control (A1R2) to give a full-scale (10kW) meter reading.

Check trip point of Red LED on Card 1 _________kW (should trip at 8 kW meter reading).

Channel B (redundant fault detector)

Set Channel B up with the same total attenuation as Channel A (not critical).

Adjust A2R2 (R2 on Card 2) so that the red LED on Card 2 trips on at a meter reading of 8 kW.

Comments:______________________________________________________________

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file: hagen\wpfiles\s_bandtx\ANTENNA_REF_powercal_worksheet.wpt