On Wed, 18 Sep 2019 at 15:07, <erik@...> wrote:
setting of the adc, the noise floor shows a very different pattern
suggesting the biggest impact on the dynamic range of the NanoVNA is
leakage and NOT noise on CH1.
If you have a NanoVNA with no screening, it would be interesting to know if
some wire wall, in a plastic bag, could be used absorb rather than reflect
RF. Wire wall should be fairly lossy.
In the professional VNAs I have used, are generally best used *without* an
isolation calibration. However, if isolation is used in the calibration, it
needs to be averaged averaged over at least 4 times the number of averages
of the DUT. I wonder if the effectiveness of the isolation could be
improved by averaging a number of isolation measurements.
Dave
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...
Telephone 01621-680100./ +44 1621 680100
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