Agilent Technologies 8753ET User Manual page 157

Making Mixer Measurements
Phase or Group Delay Measurements
10.Replace the "calibration" mixer with the device under test. If measuring group delay,
set the delay equal to the "calibration" mixer delay (for example −0.6 ns) by pressing:
Scale Ref
ELECTRICAL DELAY
−06
G/n
11.Scale the data for best vertical resolution.
Scale Ref
AUTOSCALE
Figure 2-25 Group Delay Measurement Example
The displayed measurement trace shows the device under test delay, relative to the
"calibration" mixer. This measurement is also useful when the device under test has
built-in filtering, which requires >30 dB range (the maximum of R input). PORT 1 to PORT
2 range is >100 dB.
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