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I measured a 20dB attenuator with a NanoVNA. The attenuator was connected only to VNA and had nothing on the other end. I think the return loss should have been 2*10dB, but it was only about 24dB. I used a low frequency, less than 5MHz.
it's incorrect to measure VSWR/RL for attenuator with no load on the output. .
Quote from: radiolistener on January 17, 2024, 08:01:15 amit's incorrect to measure VSWR/RL for attenuator with no load on the output. .Unless that is what you want to know.
Quote from: ejeffrey on January 17, 2024, 04:09:27 pmQuote from: radiolistener on January 17, 2024, 08:01:15 amit's incorrect to measure VSWR/RL for attenuator with no load on the output. .Unless that is what you want to know.What would be a practical use of that figure (RL for unloaded att) ?