On Fri, 20 Sep 2019 at 03:52, bryburns via Groups.Io <bryburns=
[email protected]> wrote:
When a VNA is connected to an antenna (often they are outdoors) there are
some potential issues with electrostatic discharge (ESD.) In dry areas of
the world ESD can be an issue even when working with objects that are
purely indoors. I have seen issues when working on tables indoors. Other
VNA devices are known to have issues. Does anyone know how sensitive the
RF inputs to the nanovna are with regard to ESD? Is there any ESD
protection built into the RF connections on the nanovna?
--
Bryan, WA5VAH
I fail to see the need to worry if the active devices is connected across a
50 ohm resistor. 50 ohms is effectively a short circuit as far as static
is concerned.
Here¡¯s a video from dave Jones of EEVBLOG measuring the DC resistance of
antistatic mats.
Two DVM probes are put next to each other, the meter, which can read upto
300 M ohm can measure anything.
What is more an issue is having the NanoVNA connected to an antenna in the
presence of another transmitter locally. But that¡¯s another issue thing
altogether
Dave
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...
Telephone 01621-680100./ +44 1621 680100
Registered in England & Wales.
Company number 08914892.
Registered office:
Stokes Hall Lodge,
Burnham Rd,
Althorne,
Chelmsford,
Essex,
CM3 6DT,
United Kingdom
