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Making Mixer Measurements (Option 089 Only)
Measurement Considerations
6. You cannot trust R channel power settings without knowing about the offset involved.
Perform a receiver calibration to remove any power offsets by pressing:
Once completed, the R channel should display the reference power (−10 dBm in this
example).
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.
Cal
−10 x1
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