I think is good to be clear that is quite different a VNA to use on the top of
a tower or field, than on the bench, than in a lab.
You are talking about different things. All of them VNA but different targets,
and prices.
VNWA is a very fine piece of engineering for HAM use, at bench. But in my case
I need it for field/tower use as well, so a handheld unit is my view, good for
tower and bench.
Most ham devices cover HF and some of them VHF. Good for a majority of users.
For those with UHF needs... best handheld VNA I know (not professional devices)
is the KC901V or KC901S+.
http://www.deepace.net/kc901v-6-8ghz-handheld-network-analyzer-rf-multimeter/
It is a true two ports VNA, covering from 5 KHz up to 4 GHz or 7GHz, depending
on the model.
It includes spectrum analyzer and TDR.
Check this video review: https://www.youtube.com/watch?v=LN9PKKdFibo&t=25s
73, Maximo
________________________________
De: TowerTalk <towertalk-bounces@contesting.com> en nombre de Jim Brown
<jim@audiosystemsgroup.com>
Enviado: jueves, 6 de diciembre de 2018 0:55
Para: towertalk@contesting.com
Asunto: Re: [TowerTalk] Antenna Analyzers
On 12/5/2018 3:47 PM, Paul Christensen wrote:
> All the analyzers mentioned have a HF or VHF frequency limit but I rarely
> need measurements beyond VHF.
The FA-VA5 goes to 600 MHz, the VNWA 3e to 500 MHz with 90 dB dynamic
range, and 50 dB up to 1.3 GHz. Like you, I rarely need to measure
equipment or antennas above 6M. I do, however, do most TDR sweeps from
100-500 MHz, sometimes go higher to get greater time/distance
resolution. For those who don't know, the resolution of a TDR sweep
increases in direct proportion to the width of the sweep. By
"resolution," I mean the ability to see fine detail. I've never seen the
N2PK VNA, but have heard nothing but good things about it.
BUT -- last I heard, it only went to about 100 MHz, which is a
significant limitation for TDR. That's part of what comes with being
"early" -- having to design with older parts, or parts that are cheap
enough when you're doing your design.
73, Jim
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