Question: Has anyone measured the accuracy of this unit over time measuring
the same DUT?



Also, how sensitive is this unit under temperature extremes?







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Hi, there is a video showing drift over time of the VNA6000 when warming up from cold: https://www.youtube.com/watch?v=GxSWYBd888M
We haven't yet made a video for the V2 Plus4, but if I remember correctly it is similar up to 3GHz, then worsens after 3.5GHz.
Thanks

IDK, but I've used the same single 401 point calibration over 3MHz to 30MHz for two years measuring HF antennas and the calibration hasn't consequentially changed in my use.  I can measure the SOLs and get the same thing I got initially.

Hi, here's the V2 Plus4 measuring an open circuit after a 10 minute warm up. Calibration was performed when the device is cold.
Thanks

Thanks much … this is useful for my intended purposes for this device.



W4JDY

Joseph D. Yuna
Joseph D. Yuna (LCDR USN/ret.)

<mailto:W4JDY1953@gmail.com> W4JDY1953@gmail.com



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Another valuable reply … thanks for the extra effort !





Joseph D. Yuna
Joseph D. Yuna (LCDR USN/ret.)

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Same here …. Hence my original calibration question that received flack, but then the other responses sent to me were the same as your observations.



Thanks to all who were so kind in answering my question.





Joseph D. Yuna
Joseph D. Yuna (LCDR USN/ret.)

<mailto:W4JDY1953@gmail.com> W4JDY1953@gmail.com



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I left my device on for 14 days and noted the same calibration curves; so stability under normal operating conditions seems assured.

Took a RF attenuator and dumb loads and did what we used to do for sonobuoy receiver calibrations … nothing was gained except at the extreme high-end of frequencies where the connectors I knew were not designed for and skin effects take over.

So overall, these devices are good enough for “government” work so to speak.

Joseph D. Yuna
Joseph D. Yuna (LCDR USN/ret.)
1006 River Hills Rd.
Beavercreek, OH 45430-1124
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