On 9/19/2015 8:56 PM, Jim Duuuude wrote:

I just spoke with the "Mastr II Guru", and he said that if you take the discriminator audio
(off of volume/squelch high), it should work with chan_usbradio quite well.

Depending on the type of FOB, yes, there should be no problem. The URI and RIM work fine with the (large) amount of audio from the VOL/SQ HI. If using a modified or converted USB audio adapter, just make sure the audio is sufficiently reduced so the MIC input isn't over-driven.

Remember, for transmit, you need to feed it SEPARATE "program audio" and CTCSS
(you will need to use BOTH outputs of the USB device separately).

Not to argue with the MASTR II Guru, whom ever that may be, but composite works fine on MASTR II's that have the FM ICOM - - feeding the modulation pin directly. Yes, this requires pre-emphasis and limiting turned on in the software.

If the M2 is a phase modulated type, then yes, use separate audio and CTCSS outputs from the radio interface thingy. Feed the MIC HI with the voice audio and the Channel Guard input with the CTCSS audio.

Kevin Custer