Message Circuit Noise Accuracy - HP 4934A Operating And Calibration Manual

Message Circuit Noise Accuracy
SPECIFICATION
TRANSMITTER; Quiet Terminated
RECEIVER
Filters: C-Message, 3 kHz Flat, 15 kHz Flat, Program and 50 kBit
Range 600, 900 and 12000 : 0 to 100 dBm
135 and 1500 : 7 to 100 dBm
Accuracy : 10 dBm to 100 dBm +1 dBm
: 0 dBm to 10 dBm ±3 dBm
DESCRIPTION
The Message Circuit Noise accuracy is checked using an AC Calibrator and
Decade Transformer. The Decade Transformer attenuates a test signal from
the AC Calibrator.
EQUIPMENT
AC Calibrator : DATRON 4707A
Decade Transformer ; Model DT72A DEKATRAN
PROCEDURE
CAUTION Ensure that the AC Calibrator OUTPUT is switched off or set to the minimum level
_ before proceeding with the following procedure.
1 Connect the equipment as shown in the following figure;
AC CALIBRATOR
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DBCADE TRANSFORMER HP 493LA
5-34 Performance Tests