Not to mention needing strong reading glasses to see the display and the push buttons will kill your fingers after awhile or your fingers might be too fat to use the touch screen feature. To tune something you would have to make a small adjustment then wait for the slow sweep then find you went too far then adjust again and wait and oops too far the other way and keep doing that until you go lucky. In my humble opinion I think its probably ok for rough testing a duplexer but with its 1 second sweep time it would push me over the edge trying to tune something and I would smash it. I came close to just smashing the VNA with a hammer and tossing it. I just spent a frustrating 30min with my Nano VNA trying to get it calibrated and gave up and did an uncalibrated sweep of one notch on a flat pack 6 cavity notch duplexer.
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