[arm-allstar] PTT Delay idea

[David McGough]

John,

What kind of ALC circuit/system is this? What type repeater or network?

I've never heard of this being needed in ham applications, since most 
limiters for FM use have very fast attack times on high level signals.

The other factor is that the ALC won't settle if there is no audio. So,
just delaying the PTT probably isn't a solution--the user likely won't yet
be talking, as is suggested by keying for 2 seconds before talking, below.



73, David KB4FXC



On Mon, 4 Mar 2019, "John Griffith via ARM-allstar" wrote:

> I was wondering if there's a way to delay PTT for 200 milliseconds (but not
> the audio stream) so that my ALC can properly level out before anything is
> heard on the repeater?  The people on the repeater network I'm on are pretty
> good about holding the key down for a second or 2 before talking, so it
> would be a big deal.
> 
> Another option I was thinking about would to have a tone or white noise or
> anything really.. keep the ALC circuit busy and leveled during times of
> non-transmit.  Anyone have an idea?  I already have a burst of noise at the
> very beginning of the repeater ID, I would just want that to be during the
> 200ms. 
> 
> John 
> N7OKN
> 
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