I am building a device that needs to be mounted very close to UHF microphone receivers. Unfortunately I've found the Teensy 4.1 sprays a bit of RF in the UHF spectrum, enough to interfere with the audio when WL mic signals are nearing the end of reception range. I haven't had this problem with similar Pro Micro based projects
I've tried lining my enclosure with copper tape and grounding the Teensy to that, also tried different USB cables and multiple ferrite cores but it doesn't help much/enough. I've also tried different clock speeds, and it seems to not affect this RFI. Sandwiching a thick piece of aluminum foil between the UHF receiver and the Teensy project does help, but isn't practical because the project is enclosed in a very small custom 3d printed case.
The amount of RF noise coming from the Teensy seems to be the same, whether it's soldered to my PCB project (couple of encoders) or standalone/just the board. The project is battery powered
Is there anything else you think I should try to solve this problem?
Thanks very much in advance
I've tried lining my enclosure with copper tape and grounding the Teensy to that, also tried different USB cables and multiple ferrite cores but it doesn't help much/enough. I've also tried different clock speeds, and it seems to not affect this RFI. Sandwiching a thick piece of aluminum foil between the UHF receiver and the Teensy project does help, but isn't practical because the project is enclosed in a very small custom 3d printed case.
The amount of RF noise coming from the Teensy seems to be the same, whether it's soldered to my PCB project (couple of encoders) or standalone/just the board. The project is battery powered
Is there anything else you think I should try to solve this problem?
Thanks very much in advance