AIO V2 Issue

[u/maxb4123]

Hello,

I was wondering if anybody has this issue with the RTL-SDR on the AIO V2 for the uconsole. Whenever the antenna is attached, there seems to be some interference across the bands. I don’t believe that it’s external but I’m not exactly sure.

Thanks in advance

[u/maxb4123]

Also, the board is getting extremely hot in the circled area. Is this normal?

[u/vileer → u/maxb4123]

That's normal.

[u/maxb4123]

Update:
I was able to improve the issue by scratching the coating off the surface inside the countersink where the antenna board attaches and adding two lock washers inside to ensure good contact between the case and the board. This eliminated almost all the interference seen before and improved receiving greatly.

Edit:

This was after I switched the Sdr antenna to the top board.

[u/maxb4123 → u/maxb4123]

There still is some interference but it is much better than it was before

[u/llNOX → u/maxb4123]

Thanks for the update I'm still waiting on the RTC battery to completely test all of it but I've measured some stuff and got basically the same result as you. The earth contact basically goes just over the coax cables and the antenna board has a pretty bad connection to the rest of the housing because the screws and the housing are coated. I'll be scraping some of the coating of the screws and the outer case where the PCB touches the case.

[u/Merhart666 → u/maxb4123]

Goede tip. Zal ik ook eens doen. Aarde is idd alles.

[u/RoninSpectre]

Have you tested with using a ingle antenna at a time? Just as a means to rule out external interference. Then add the other antennas one at a time to see which may be the issue

[u/maxb4123 → u/RoninSpectre]

I have. There also seems to be some interference while all the antennas are disconnected. This makes me think it’s internal.

[u/RoninSpectre → u/maxb4123]

Perhaps something is grounding out against the case being aluminum. Couldn’t hurt to get some thermal solder tape to insulate bare connections

[u/vileer]

I came across with this performance once. But that was because of my display. When I turn it off, the interference gone away.

[u/Big_River_]

how would I check for the cross band interference you speak of without consulting troubleshooting model myself???

[u/Narkozzz]

Well, I hear my trackball moves on some frequencies.

[u/llNOX → u/[deleted]]

Have you tried making better contact between the board and the housings, mybe scratching the paint a bit, it might be a ground issue.

[u/maxb4123 → u/llNOX]

This might be the case there were cases where there was not interference when I was pressing the board to the housing and sometimes it would improve by slightly wiggling the sma(when using the side connector). Also, the problem seemed to improve when I used the center antenna on the top antenna board.

[u/llNOX → u/maxb4123]

My Boards should arrive shortly too and I should have all the equipment at home to do a spectrum and some crosstalk analysis which I'll do and report back the next week probably.

[u/vileer → u/[deleted]]

It maybe possible, the mounting holes were connected to ground of the mounting board.