Power Meter Calibration - Agilent Technologies 8753ET User Manual

Making Mixer Measurements
Measurement Considerations
5. You cannot trust R channel power settings without knowing about the offset involved.
Perform a receiver calibration to remove any power offsets by pressing:
Cal
RECEIVER CAL
TAKE RCVR CAL SWEEP
Once completed, the R channel should display 0 dBm. Changing power ranges will
require a recalibration of the R channel.

Power Meter Calibration

Mixer transmission measurements are generally configured as follows:
measured output power (Watts) / set input power (Watts)
OR
measured output power (dBm) − set input power (dBm)
For this reason, the set input power must be accurately controlled in order to ensure
measurement accuracy.
The amplitude variation of the analyzer is specified at ±1 dB over any given source
frequency. This may give a maximum 2 dB error for a mixer transmission test setup: ±1 dB
for the source over the IF range during measurement and ±1 dB over the RF range during
measurement.
Higher measurement accuracy may be obtained through the use of power meter
calibration. You can use power meter calibration to correct for power offsets, losses, and
flatness variations occurring between the analyzer source and the input to the mixer
under test. Refer to the power meter documentation for its calibration procedures.
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