maybe some "switching" noise from the display??
my vna v2 had some noise on the power rail caused by the display
... some added caps and it was solved
dg9bfc sigi
Am 14.07.2024 um 14:19 schrieb Kb4yho:
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On Sun, Jul 14, 2024 at 05:16 AM, Kb4yho wrote:
I found using my Oscope noise on the power cable going to the
display board.
Appears DSI/DPI ribbon cable coupling RFI onto unshielded
power cable.
I could actually move the front panel away from the board and
the RFI was almost gone.
I put a 2x 3.5mm ferrite bead on the power cable. RFI noise
has been attenuated greatly. It’s no longer audible.
Now just some birdies. I’ll deal with them.
So successful troubleshooting.
Took awhile to track down.
Fairly simple fix.
?
