Hello,
according to the specs should be the lowest frequency step 10KHz.
If I set:
Num sweep points  = 201
Start  435MHz
Stop. 436MHz

Displayed freq step  5KHz from data point to data point.
Conclution: Minimun frequency step is less than 10khz or the start stop range is in reallity differen than displayed or the real data points are different than showen on screen . Finally the diplayed values for each second datapoint (eg 435,005MHz) is interpolated.
Are there any ideas what the nanovna v2 p4 is doing in this case?
FW git-20210225-ebc366e

Greetings TomS

Min frequency step in > 140 MHz range for official fw = 10k

You can select less range, but used frequency for any point = (int)(freq/10000)*1000

Tom,
The Ojisan firmware for the V2 (original and 4 inch but, not plus or plus4) does allow smaller steps.  I think that they are 6kHz in the 2.2-4.4 GHz range, going progressively smaller on lower octaves.
--John Gord

On Sun, Aug 1, 2021 at 12:35 PM, TomS wrote:

>
> Hello,
> according to the specs should be the lowest frequency step 10KHz.
> If I set:
> Num sweep points  = 201
> Start  435MHz
> Stop. 436MHz
>
> Displayed freq step  5KHz from data point to data point.
> Conclution: Minimun frequency step is less than 10khz or the start stop
> range is in reallity differen than displayed or the real data points are
> different than showen on screen . Finally the diplayed values for each
> second datapoint (eg 435,005MHz) is interpolated.
> Are there any ideas what the nanovna v2 p4 is doing in this case?
> FW git-20210225-ebc366e
>
> Greetings TomS

>Ojisan firmware for the V2
Yes (but ask about V2Plus4) Ojisan firmware for the V2 made 6k step, going progressively smaller on lower octaves.