I was going to run some comparisons between my Siglent SVA1032X and the SV4401A. I had not used the 4401 in several months.
I did an SOLT calibration after setting the frequency range for the test. I thought it odd that all (4) boxes in the CAL page were already checked, but I went ahead and did the full calibration. Clicked on DONE when it completed.
I used my HP calibration set and later another valid SOL set.
The top of the screen confirms that SOLT is valid, but SWR measures infiniti with any 50 Ohm load and with the through cable attached loss says nan dB.
Previously saved calibrations still work.
It has been a while, but am I missing something in my CAL procedure or??
Tnx,
Dale W4OP

you must do a calibration 'reset' before starting the cal, that will clear
the previous cal info.

On Thu, Oct 10, 2024 at 12:45 PM Dale Parfitt via groups.io <PARINC1=
FRONTIER.COM@groups.io> wrote:

I was going to run some comparisons between my Siglent SVA1032X and the
SV4401A. I had not used the 4401 in several months.
I did an SOLT calibration after setting the frequency range for the test.
I thought it odd that all (4) boxes in the CAL page were already checked,
but I went ahead and did the full calibration. Clicked on DONE when it
completed.
I used my HP calibration set and later another valid SOL set.
The top of the screen confirms that SOLT is valid, but SWR measures
infiniti with any 50 Ohm load and with the through cable attached loss
says nan dB.
Previously saved calibrations still work.
It has been a while, but am I missing something in my CAL procedure or??
Tnx,
Dale W4OP

I've not used the 4401. But on any of the NanoVNAs, one must do a "RESET"
before running the SOLT cal. I'm not aware if the '4401 operates in a
similar manner.

Dave - WØLEV

On Thu, Oct 10, 2024 at 6:45 PM Dale Parfitt via groups.io <PARINC1=
FRONTIER.COM@groups.io> wrote:

I was going to run some comparisons between my Siglent SVA1032X and the
SV4401A. I had not used the 4401 in several months.
I did an SOLT calibration after setting the frequency range for the test.
I thought it odd that all (4) boxes in the CAL page were already checked,
but I went ahead and did the full calibration. Clicked on DONE when it
completed.
I used my HP calibration set and later another valid SOL set.
The top of the screen confirms that SOLT is valid, but SWR measures
infiniti with any 50 Ohm load and with the through cable attached loss
says nan dB.
Previously saved calibrations still work.
It has been a while, but am I missing something in my CAL procedure or??
Tnx,
Dale W4OP

--

*Dave - WØLEV*


--
Dave - WØLEV

On Thu, Oct 10, 2024 at 12:11 PM, W0LEV wrote:

I've not used the 4401. But on any of the NanoVNAs, one must do a "RESET"
before running the SOLT cal. I'm not aware if the '4401 operates in a
similar manner.

On my firmware not need reset, device always collect RAW data on calibration
If frequency range equal old calibration, new calibration data overwrite old.
If frequency range different, all old calibration reset automatically

Hi Dale
Please keep us updated on how they compare, as I have just got myself a
saa3021x plus and will change the firmware if it is a lot better then the
sv4401A
Thanks Dave 2E0DMB

On Thu, 10 Oct 2024, 21:18 DiSlord via groups.io, <dislordlive=
gmail.com@groups.io> wrote:

On Thu, Oct 10, 2024 at 12:11 PM, W0LEV wrote:

I've not used the 4401. But on any of the NanoVNAs, one must do a "RESET"
before running the SOLT cal. I'm not aware if the '4401 operates in a
similar manner.

On my firmware not need reset, device always collect RAW data on
calibration
If frequency range equal old calibration, new calibration data overwrite
old.
If frequency range different, all old calibration reset automatically