[arm-allstar] COS line lost and frequent spurious Key Downs.

[Kevin Custer]

The COS and CTCSS logic inputs of most radio interfaces have nothing to 
do with specific voltages on these logic pins - and everything to do 
with the existence of a switched ground.

Here's something that may help with understanding how these inputs 
actually work:
http://www.masterscommunications.com/products/radio-adapter/logic-inputs.html

Kevin W3KKC


On 12/28/2022 9:59 AM, Dave Petrie via ARM-allstar wrote:
> hope this helps i don't use the rim i use cm108 startech:
>
> questions:
> 1 no
> 2 yes
> 3 i don't know
> 4 i don't know
>
> cos and ctcss input connections on the usb interface are
> voltage detection not frequency decode, the decode is done
> before the pickup point that is then transferred to the
> simpleusb.conf
> the settings in the simpleusb.conf must be right in order
> for QSO's to work as you stated.
> I would suggest that your pickup point for cos is poping
> with fake signal, so to avoid that try setting,
> rxondelay=5   it is adjustable 0-20 in 20ms segments
>
> Good Luck
> Dave-WA2KJC
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