开云体育

Hello
I have a H4 (HW Rev. 4.2).
I read the newbie stuff and i think i understand the fundamentals. (I also read Dislords firmware update notes)
When i got it, the firmware was 1.0.39.
I installed the STM tools and got them running. Flashing firmware works perfect.

Up until FW 1.0.53, the Nano behaves like i expected it to. (When running, the screen refreshes about every second. Calibration takes about 4 seconds for every mode.(open, short, load...))
I see jagged lines on the screen, that change slightly with every screen update.
I also see sweeping signals at S11 with the oscilloscope, when i set the stimulus from 6 to 7 MHz for example.

With FW 1.0.64, the Nano doesn't start at all, from 1.0.69 onwards, the Nano starts, but i don't see screen refreshes every second or so. (The latest FW i tried was 1.2.00)
I don't see jagged lines, that get updated. Calibration takes 40-50 seconds for every mode.
When i measure a stimulus from 6 to 7 MHz with the scope, there is a non-sweeping signal of somewhere arounf 100-150 MHz(I have a old analogue Tektronics scope)... the signal at S11 stays the same, whatever frequency is set. (CW or center with 0 sweep)

Is there a setting, that's wrong? Maybe in the expert settings?
Any help is appreciated.

73 de HB9SFG

Have you tied Clear Config?

Roger

Hello Roger

Thanks for the answer.
I tested clear config and restart with 1.2.00, no luck. (i reduced the sweep points to 51 and it took "only" about 20 sek for a sweep, but no useful readout connected to my DemoKit 6.5MHz BSF)

Then i saw in the vna beta group, that there is a 1.2.02 version.
I installed it and heureka, it sweeps even faster, than 1.0.53.
I also have a useful signal at S11. (I actually need it as a signal generator to do some tests on my (tr)uSDX 5-band | multimode TRx | 5W | QRP)
I'm happy again ;-)

Thomas