Re: [Tlf-devel] PTT in cwdaemon?

[rein couperus PA0RCT]

Hi Wolf,

PTT is used mainly to cold switch a PA or antenna relay etc...
The way it works is that you specify a Turn On Delay of 0 to 50 milliseconds 
and a PTT hold time the length of a word space (3 dits) after the buffer is 
empty. (The next message will begin with a TOD again, so there is plenty of 
time for the relays to fall off ).

A value of 0 would disable the PTT (default).
.
This means that the CW output is delayed by this amount, giving the relays in 
the PA time to switch. 

For Phone messaging the same function can be used, live fill-ins are normally 
handled by VOX, PTT switch on the Mike, or a foot switch. But I am not an 
expert on Phone contesting :-)

Rein PA0RCT

On Monday 05 May 2003 17:18, Wolf-Ruediger Juergens wrote:
> Hello OM's,
> Before I try to implement the PTT in cwdaemon, can you explain how the PTT
> should work exactly?
> As far as I know PTT should become activ a few milliseconds before the
> first char is send and must stay a while longer activ after the last char.
> The pin must be pin 7, RTS. Thats what I read from other keying and/or
> digital programs.
> What is the main reason for this PTT feature? Delayed switching of a PA? Or
> using as PTT key for SSB? And what times for delay is handy?
> Sorry for so many questions only to switch one pin , hi. :-)
>
> 73 de Wolf, DL2WRJ

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