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Gear / Technical Help => Remote Power => Topic started by: sdbirder on September 09, 2023, 01:30:41 PM
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I've noticed consistent noise in my spectrograms at 50 kHz when using the USB-C port to power my Zoom F3. This noise disappears when I record using AA batteries. Does anyone have recommendations for effective USB noise filters, preferably USB-C compatible?
I'm recording lengthy sessions of migrating nocturnal birds and need external power for 8+ hour sessions. Normally, the noise at 50 kHz wouldn't be a concern, but I do occasionally capture bats in that frequency range, making the noise problematic.
Edit: Problem solved, I used a different USB-C cable, a Cable Matters, [USB-IF Certified] USB4 Cable (40Gbps). Amplified to -0db to confirm and it's gone, not a trace. I think it's due to the better shielding on the premium cable.
https://www.cablematters.com/pc-1371-188-usb-if-certified-usb4-cable-40gbps-with-power-delivery.aspx
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I am assuming that you are using an AC transformer? Can you just used a large usb battery?
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I am assuming that you are using an AC transformer? Can you just used a large usb battery?
I've tried 2 wall usb AC chargers and 3 different usb battery banks and it still occurs.
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I would talk to zoom? Does it occur on other recorders as well. Most aren't paying attention to frequencies we cant hear within reason.
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Problem solved, I used a different USB-C cable, a Cable Matters, [USB-IF Certified] USB4 Cable (40Gbps). Amplified to -0db to confirm and it's gone, not a trace. I think it's due to the better shielding on the premium cable.
https://www.cablematters.com/pc-1371-188-usb-if-certified-usb4-cable-40gbps-with-power-delivery.aspx