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I used the Agilent 85033C Cal Kit. When I finished the Cal procedure, I re-checked the short, open and load terminations on the VNA's Smith Chart, and they were correct.
So I am puzzled by the positive S11 response.
Thank you SunnySkyguy. I calibrated the VNA to the end of the test cables, and I have SMA connectors soldered directly to the PCB. Do I need to include the SMA connectors in the calibration? If so, how?
A freshly calibrated HP8753ES Network Analyzer measured a positive S11 on a passive PCB. The blank PCB will be used for an amplifier, and is composed of input and output matching networks. The only mounted components on the board are 0402 capacitors and SMA connectors. What am I missing?
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