Hi,
what I found out for a unit in Pro mode (SVA3021x+) regarding VNA calibration & firmware 3.2.2.5.0.r8.
1) 1-port cal - does not really work suffiently.
2) Enhanced response calibration is working quite well. It does not change the start & stop frequencies, nor the number of points. After a performed calibration it is saving the data internally, Calibration on/off is only working from the enhanced response menu. This is true for a cold boot, too. Only downside you need to memorize the number of points you performed for the calibration. As soon as you apply the "right" number of points, start & stop freq., the calibration is used and showing "COR" in the upper left corner.
3) you can save calibration data as ".CAL" for example on the internal flash. When you load the data, you only need to apply points, start & stop - and again the "COR" shows up. (note them in the file name!)
4) For me it seems all preset and user Calibration Standards are not working. Port extension is not saved, either.
I want to thank electr_peter and tv84 for submitting the instruction to cross flash the SSA3021X+, nice job!
The unit I have still with firmware 3.2.2.4.0.r2 and I agree the 1-Port Cal does not work properly, but if you want to change the frequency just touch the screen where the numbers are: 100 kHz, 751, 3.2 GHz then you can change the values.
I tried the Siglent Cal Kit configurations and it seems they are working. if you try to calibrate with them you get an arc in the Smith Chart because the plane is not flush, check the calibration data in the Siglent Datasheet, in most of them the Reference Planeplane is shifted
With the User Cal I was able to make it work with Enhanced Response especially if you want to adjust the connector reference plane, but there is a trick:
- Select Cal Kit
- select User cal 1 or 2
- change at least 1 parameter,( if don't want to change anything (for example all 0) then go back one step and restore the parameter at its original value)
- go back and perform Enhanced Response Cal checking the correct User cal is selected.
if you try to change profile cal like switching from User 1 to 2, and redo Enhanced Response Cal
the SVA still uses User cal 1 even if it still shows is using User cal 2. To force the VNA to load the User Cal 2 settings you need:
- Select Cal Kit
- select user cal 2
- change at least 1 parameter entering one value (example Define Open -> Delay 1s)
- go back one step
- change back the same parameter to its original value
This procedure seems to force loading the correct User Cal.
I hope this can be useful.
Alfredo