[GreenKeys] SELCAL - Autostart

Tue, 27 Apr 2004 21:57:06 -0700

The Hal ST-6 turns on with strictly a carrier on the mark channel. 
Turns on the printer as well.  20-30 seconds after loss of mark tone
it'll shut down the motor on the printer unless you have the Auto-Auto
Off in the auto off position.
No other characters require for the turn on function.  Don't know about
other Hal etc units but i suspect they pretty well operate in the same
matter.  

Haven't read the manual on the Dovetron thru and thru yet but in
watching the lights and listening to the carrier on the receiver, it
appears to key up as soon as it sees channel tones.

What kind of TU requires characters to be sent before turning on?  Guess
my knowledge base here is very limited.

Larry

Eric Scace K3NA wrote:
> 
>    Pretty much every TU I ever came across would turn on when a carrier appeared and 12 LTRS had been sent.
> 
> -- Eric K3NA
> 
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of Bob Camp
> Sent: 2004 April 27 21:56
> To: greenkeys List
> Subject: [GreenKeys] SELCAL - Autostart
> 
> Hi,
> 
> Another time issue in net operation is the carrier detect timing on the
> TU. Obviously we can build a TU with about any time constant  We can
> also transmit as much carrier as we need to in order to fire up the
> carrier detect. We also want to be compatible with as much stuff as we
> can be. So the question is -- how much carrier is enough to turn just
> about any TU on? If we are setting up timing in PIC's and that sort of
> thing we may need to identify this stuff a little more precisely than
> we have in the past. Also if we are going to be building a new batch of
> TU's it would be nice to know what to set up the carrier detect to act
> on. Timing is everything .....
> 
>         Enjoy!
> 
>                 Bob Camp
>                 KB8TQ
> 
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