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Here is a 1 dB SMA pad terminated in a short. The cal was done at the end of a SMA connector saver. The 1 dB pad connected to the saver and the pad shorted with their short SMA cal. The Gamma should be 0.87, the marker read out is ~ 0.83-to-0.85 for the most part till 900 MHz where the Gamma drops to ~ 0.8.

Alan

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From: [email protected] <[email protected]> on behalf of alan victor <avictor73@...>
Sent: Saturday, July 6, 2019 9:34 PM
To: [email protected]
Subject: Re: [nanovna-users] Messaging (over USB-C) between nanovna and PC client - documented (or could be)?

Ernst,

I have done something similar. I will see if I can gather up the worse case that I have considered. A calibrated 1 dB SMA pad terminated in a short. Hence, a 2 dB return loss, a reflection coefficient of ~ 0.8

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From: [email protected] <[email protected]> on behalf of dk1vi <dk1vi@...>
Sent: Saturday, July 6, 2019 8:35 PM
To: [email protected]
Subject: Re: [nanovna-users] Messaging (over USB-C) between nanovna and PC client - documented (or could be)?

I have commercial mismatches specified up to 4GHz with N-cnnectors (m). After calibration with the supplied SMA calset I mesured the mismatches connected via an SMA (m) to N(f) adapter.
The result was very convincing, see enclosed plot.
Ernst