HP 8712C - Reducing Mismatch Errors in a Transmission Measurement; Reducing Mismatch. Errors When Measuringbbth; Reflection and Transmission

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Optimizing Measurements
Reducing Mismatch Errors
Reducing Mismatch Errors in a
Transmission Measurement
Source match errors in transmission measurements can be reduced by
performing an enhanced response calibration. (See Chapter 6.) Load
match errors can be reduced by using an attenuator on the analyzer’s
TRANSMISSION RF IN port.
NOTE
Always use high quality attenuators. Six to tan dB of attenuation should be sufficient to significantly
reduce mismatch errors.
Reducing Mismatch Errors When Measuring Both
Reflection and Transmission
When you want to measure reflection and transmission simultaneously, or
without changing the test setup, perform both a reflection calibration and an
enhanced response calibration using the exact frequency parameters that you
will be using for the measurement, and put a 6 to 10 dB pad directly on the
output of the DUT.
NOTE
Using an attenuator on the output of the DUT will reduce the system dynamic range.
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