8.To make a response error-correction, press:

9.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:

10.Scale the data for best vertical resolution.

Ctll

*

PRm

Cor

Del

Smo

Hld

Ofs

-CENTER .300 000 000 GHz

SPAN .lOO 000 000 GHz

Figure 3-18. 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 llltering, which requires >30 dl3 range (the maximm of R input). PORT 1 to PORT 2 range is >lOO dl3.

3-26 Making Mixer Measurements

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Image 168
HP 8753E manual To make a response error-correction, press, Scale the data for best vertical resolution