Symptoms / Solutions:
I am using the PNA-X for the Time Domain Analyzer instrument for my wave measurements. I am using Port 1 as my input port and port 2 (or any other) as my output port. After calibrating the setup, my verification at 50 Ohm on a thru is correct with GainWaves = 0 dB. However as soon as I move my source tuner, the calibration is no longer valid and complex conjugate positions do not result in a GainWaves = 0dB on a thru.
The PNA-X has a switch on the input that can select whether to pass through the external front loop or an Internal path. The user must select the External path so that the A receiver at the reference loop is active and measuring.
How to access Path Configurator
Using HARDKEY [softkey] buttons:
1. Press TRACE/CHAN
2. then [Channel]
3. then [Hardware Setup]
4. then [Path Config…]
Using Menus:
1. Click Trace/Chan
2. then Channel
3. then Hardware Setup
4. then Path Config…
In the RF Path Configuration, select the radio button for External in the Port 1 Reference Mixer Switch. Then recalibrate the wave calibration (12 term and power calibration).
Keywords: FDCS, Wave calibration issues, PNA-X, Port 1, Reference Mixer Switch
Last date modified: March 31, 2017
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