[arm-allstar] Heavy static and dropping from my HTs audio in FTM-400/ DMK URI Node

[David McGough]

Okay, just confirming:

...Audio from the FTM-400 to the node is fine.

...Audio from the node to the FTM-400 and going out the FTM-400 
transmitter is bad.

How are you connecting the URI TX audio to the FTM-400 input? If via the
mic connector, I suspect a level issue, where the URI output level is way
too high. If this is the case, attenuate the TX audio output from the URI
before the FTM-400 mic input using a resistive attenuator pad.

73, David KB4FXC


On Sat, 15 Feb 2020, Victor I. Zarich wrote:

> Good morning,
> Thanks for taking time to respond. The Audio from the node to the 
system is fine, I am getting good quality audio reports from my 
transmitted audio aside from the occasional dropout. The big problem is 
the audio from the system into the node. It is so scratchy that the audio 
is almost not audible on either my node radio, or the audio transmitted 
from the node over the air.
> 73s, de Vic V6VIZ
> Sent from my iPad
> 
> > On Feb 15, 2020, at 8:53 AM, David McGough <kb4fxc at inttek.net> wrote:
> > 
> > 
> > Hi,
> > 
> > So, audio to AND from the node over RF is bad?
> > 
> > My first suspicion would be a bad ground connection (ground loop) between 
> > the radio and the RPi4. Or, perhaps RF (or other noise) getting into the 
> > audio connections.
> > 
> > How are you obtaining TX and RX audio from the FTM-400?? How are you 
> > powering the RPi4?
> > 
> > 73, David KB4FXC
> > 
> > 
> >> On Sat, 15 Feb 2020, "Victor Zarich via ARM-allstar" wrote:
> >> 
> >> 
> >> Hello everybody,
> >> I set up a new node consisting of a Rasberry Pi4, to DMK URI, to Yeasu 
> > FTM-400. Upon connecting and utilizing the node the audio from my 
> > FTM-400s speak as well as the audio from the HT that I am using to 
> > connect to the node have very poor audio that I can not seem to adjust 
> > using the receive or transmit menus in HamVoip. The same system work fine 
> > through IC-9700 with a few adjustments in the menus. Has anyone else had 
> > the same experience, or have any feedback as to a possible remedy? I 
> > really would like to use the  Yeasu FTM-400 as my nodes radio.
> >> _______________________________________________
> >> 
> >> ARM-allstar mailing list
> >> ARM-allstar at hamvoip.org
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> >> 
> >> Visit the BBB and RPi2/3/4 web page - http://hamvoip.org
> >> 
> > 
> 
>