MMDVM DAC Level Overflow

General support for the Pi-Star System
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G0FHM
Posts: 57
Joined: Mon May 14, 2018 8:47 pm

MMDVM DAC Level Overflow

Post by G0FHM »

Hi Folks,

I'm running dual mode FM/DMR repeater with a BI7JTA/VR2VYE V3F4 modem.

DMR all works fine, but in FM mode I get a lot of noise holding the TX open with MMDVM ADC (and/or DAC) levels have overflowed scrolling in the live log screen.

Is this a hardware issue? I know that FM performance is far from fantastic due to using the low level audio to/from the radios.

Is there an easy fix before I knock up a repeater cable and bypass the MMDVM for FM?

Thanks,

Jay (Keeper GB3GS)
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