28 N9069C Noise Figure Measurement Guide
Making Noise Figure Measurements
Making Frequency Converter Measurements
Making Multi-stage Converter Measurements
The multi-stage converter measurement is similar to the measurement
procedure as described above. However, with a multi-stage converter
measurement, there is no fixed relationship between the RF and IF frequency.
You need to enter the RF and IF frequencies according to the input and output
of the DUT.
In multi-stage converters, there might be more than one LO used. The noise
figure measurement application can control only one of them.
Measurements with a System Downconverter
A system downconverter can be thought of as a frequency extender for the
analyzer, to allow measurements to be made on DUTs at frequencies that the
analyzer does not cover.
Figure 2-6
System Downconverter Calibration and Measurement
If the measurement includes the insertion loss of any filter that was not calibrated out at the
calibration step, it can be removed by pressing
MEAS SETUP
,
Loss Comp
tab,
Loss
(Before DUT
or
After DUT
),
Loss Comp Mode
,
Fixed
on the analyzer and entering the
insertion loss value for the device.
You can also do table loss and create distinct frequency/amplitude values.
This measurement discussion uses an unspecified external downconverter. So
there are no warranted specifications or characteristics provided for the
measurement system.
Summary of Contents for CXA N9000B
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