[arm-allstar] half duplex node linking to a repeater

[Neil Sablatzky]

I don't understand like Cory said if the transmitter is transmitting how can you receive being half duplex is sharing transmit and receive on the same frequency?

Sent from my iPhone

> On Jul 18, 2015, at 4:39 AM, David McGough <kb4fxc at inttek.net> wrote:
> 
> 
> Hi Sione,
> 
> Yes, you can override and "key up" a half-duplex (HD) node. The method is
> to connect to the HD node from a full-duplex (FD -- e.g.: duplex=2
> repeater) node. When the FD node is receiving a signal (COS active), it'll
> key the HD node, even if the HD node is receiving.
> 
> This method causes a side effect, which must be overcome, however. Since 
> the HD node will almost always be hearing something (COS active), the 
> app_rpt timeout timers will never reset and the FD repeater will 
> eventually time-out. This limitation can be overcome by temporarily 
> disabling the time-out timer (COP,8 command). Then, re-enable the timer 
> (COP,7) once you're finished.
> 
> We use this method on various remote-base radios and repeaters daily and
> it works well.  I've found that some FD repeater users must have a little
> training to understand the non-standard repeater behavior when using this
> method, but once they understand it, all is good.
> 
> Finally, there is one HUGE factor to think about when using this method:  
> The FD repeater transmitter will likely be at 100% duty cycle--the FD
> repeater almost never un-keys while working this way...So, make sure your
> RF hardware is up to the challenge!
> 
> 
> 73, David KB4FXC
> 
> 
>> On Fri, 17 Jul 2015, Sione Ragle wrote:
>> 
>> 
>> Hi I have a node that is used for linking my local repeater to another 
>> repeater using a half duplex node.
>> 
>> Some repeaters I link do have a long hang time and I find that I can't 
>> keyup the link until the remote repeater is unkey. Is there a way to 
>> make it so I can key up the half duplex node at any time I want and not 
>> wait for the carrier to drop from the remote end?
>> 
>> Thanks,
>> --Sione
>> 
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