You can save raw impedance data to memory on the FA-VA5 while using it
standalone in the field and then download it later to the VNWA software.
The one frustrating limitation of using the unit standalone is that you
are limited to 101 frequency points per memory register (IIRC, the unit
has 10 memory registers). For typical antenna impedance measurements,
that is fine, but for TDR measurements, it can limit resolution. You can
get around this somewhat by saving sub-segments to different memory
registers and then combining them after download. In theory this would
allow you to achieve the equivalent of saving 1010 frequency points
while using the unit standalone.
73, Mike W4EF....................
On 11/5/2021 10:21 AM, Wes wrote:
Since you don't want to read any manuals, this is probably a moot
point, but the VNWA software has TDR provisions. Whether you can get
enough data out of the FA-VA5 or not isn't clear to me without reading
the manual. I too have better things to do at the moment. :-)
Wes N7WS
On 11/5/2021 9:35 AM, Dave Sublette wrote:
I have one of these which I use to check SWR and measure component
values.
I love it. I know it is capable of doing more. I just haven't had a
need
to use it any other way. What I am wondering is, will the thing act
as a
TDR?
I have a 200 foot run of half inch Superflex cable buried in a PVC pipe.
Thanks to a recent lightning strike, It measures shorted at one end
of the
run and open at the other. If I could get some Idea where the
problem is,
perhaps I could dig it up and repair it without trying to pull and
replace
it. A fault like this implies to me that there is a clean break
somewhere
and a short somewhere else. With a TDR, I could find the break and
repair
it, then find the short.
Any other thoughts? Sure would be nice if I could get this repaired
before
winter sets in.
Thanks & 73,
Dave, K4TO
ps -- I know there is a manual for this. Please don't suggest that I
read
it. I have nine pieces of equipment to repair and I am up to my ears in
alligators!
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