According to manual, the TDR function is accomplished by measuring R and X over
the entire frequency range (in my case 600 MHz).Then an IFFT is applied to the
data and “impulse and step response are calculated”. The manual calls it
Frequency Domain Reflectometry.
Regrettably, there seems to be no way to change the number of frequency points.
A typical measurement can take about 60s to return a result.
> On Jul 9, 2016, at 07:29, jimlux <jimlux@earthlink.net> wrote:
>
> On 7/8/16 10:30 PM, Paul Braiman wrote:
>> I've been using the AA-600 for 2+ years now. Very capable analyzer.
>> Screen is easy to read, the controls easy to use. The only drawbacks
>> are the use of a type n connector, and the slow time it takes to do
>> TDR on a feedline. But then, a real TDR costs waaaay more money.
>>
>
>
> Can you change the number of frequency points it uses to do the time domain
> plot? I assume it's measuring at a series of frequency steps and then doing a
> transform to time domain.
>
> If you don't need as many points of resolution, it can go faster. If you
> keep the step spacing the same, and use fewer points, the time resolution
> will be worse, but the maximum unambiguous distance will be the same. If you
> keep the total frequency span the same, the resolution stays fine, but you
> bring the unambiguous distance in.
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|