Hmm, did someone say that they will add a change in bandwidth in VNA mode in the new firmware ? Alternatively, has anyone sent a proposal for such changes in the firmware to Siglent ?
I think the issue is very clear to Siglent, otherwise there wouldn't be an "IF bandwidth" option in the GUI... that, unfortunately, is grayed at 10 kHz, as it was more or less since the beginning.
The issue was discussed several times in eevblog and the option is long waited, I think they read the forum. I don't know of direct contacts to signal the issue, perhaps tautech could do so.
Yes, I know that this option is currently inactive and something actually reminds me that the subject of the BW in the VNA mode was discussed. However, this does not mean anything and so the currently inactive option in one of the firmwares may well be removed.
Tautech mentioned that people from Siglent read this forum, but in such a long thread (there's also a thread about SVA
https://www.eevblog.com/forum/testgear/siglent-sva1015x-1-5ghz-spectrum-vector-network-analyzer-(coming)/ ) it's very easy to miss something (even for someone who follows these topics often). Maybe it would be easier if there was a topic like in the case of oscilloscopes (bugs in the firmware and proposals for new functions).
IMHO, I still say that without submitting such proposals by distributors and customers themselves to support, it is difficult to count that writing only on the forum will somehow affect the manufacturer. Let's say as if they had to closely follow all the topics on all forums in the world, they would not have employees to read all of it
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Siglent for the SVA1000X and SHA800A models (higher dynamics 90dB vs 114dB, most likely improved electronics compared to the SVA1000X) clearly states IF BW 10KHz - so it is not known if they plan to change it. Only the SNA5000 and SNA6000 series offer IF BW 10Hz - 3MHz...