[arm-allstar] Icom UR8050 connection

[David McGough]

Hi Matt,

Yes, carrierfrom=usb means COS is active-high.

Note that most CM108/CM119 fobs have weak internal pull-up resistors. As a
side effect, you may have your node become "keyed" (COS active) when the
fob is disconnected from the repeater or the repeater is powered off. If
you encounter this issue, one solution is to add an always present
pull-down resistor at the COS input on the fob.


73, David KB4FXC


On Sun, 25 Sep 2016, Matt via arm-allstar wrote:

> Hi all.
> 
> I'm trying to get an Allstar node connected up to an Icom UR8050 
> repeater. I'm using the RPi3 image which is working well and a modified 
> USB sound fob.
> 
> The Icom has a "Busy" output which becomes high when the repeater is 
> receiving so I guess this need to connect to the COS line on the USB 
> fob. My question is, what setting should I use in simpleusb.conf?
> 
> I think I should be using carrierfrom=usb. Can anyone confirm that?
> 
> Thanks.
> 
> Matt
> M0LMK
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