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Agilent E4406A Vector Signal Analyser

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PA0PBZ:
Thank you for starting this topic. I have the VSA also to look at and learn about the different digital modulation formats, and I also have a E4433B to feed it.
I knew about the 89600 software and planned to have a look at it, but somehow there's always more important things to do... Well, you finally made me install it and have some fun, I even managed to get a reasonable QAM64 display:



QAM256 however looked like spaghetti, not sure what is going wrong. Anyway, looks like I have 14 days left to find out  :-\

G0HZU:
Hi PA0PBZ
Which version of the software are you running? I started out looking at the first version that supported the E4406A that is dated 2001 (version 2?) and went through Version4 to Version 12.

I think that support for the E4406A runs from Version2 through to Version9 but E4406A support is possible on later versions with a (semi official?) registry fix from Agilent.

The later B version of the SW (Version 19) looks good but I'm not sure if this can be made to work with the E4406A. However, the B version SW works with the Agilent E4440A PSA analyser and my E4406A has the same CPU module and analog IF and digital IF modules as a PSA analyser so maybe it can work with the E4406A. But there may be a firmware limitation that prevents this in the E4406A?

I saw what you did with yours in this thread here:
https://www.eevblog.com/forum/testgear/%27free%27-vsa-options/

Interesting stuff! :)


PA0PBZ:
Hi,

I got the latest version (12) of the 89600A software from here: http://www.keysight.com/main/software.jspx?ckey=1303376
and of course the registry fix. I noticed that while the instrument on itself can do a 10MHz span, the software only goes to 8.
I use the LAN connection and it seems to work fine.

G0HZU:

--- Quote ---QAM256 however looked like spaghetti, not sure what is going wrong. Anyway, looks like I have 14 days left to find out  :-\
--- End quote ---

I had the same issue but I found it worked perfectly at higher symbol rates. eg I turned the 256QAM signal up to 512kbpson the E4433B and the 89600 SW and the errors went right down and the constellation looked really clean :)

I think it's more realistic to run it at a symbol rate like this :)

1design:
If you use the equalizer you might also improve a bit your EVM reading.
Try also increasing the number of symbols, this wil show if the source has any phase noise or amplitude and phase imbalance issues.

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