I think "exercise" is the wrong term.
You're talking about hardware (the serial port) and how it behaves
before it is initialized.
Saying that the OS has anything to do with how a port behaves before the
OS boots is a bit questionable.
It's possible that Apple's hardware behaves consistently on power-up --
I'd believe that. Apple operating systems don't have to contend with
the same amount of random hardware.
73 -- Lynn
On 10/13/2014 11:09 AM, Rick Prather wrote:
OS X doesn't do it.
Rick
K6LE
On Mon, Oct 13, 2014 at 7:00 AM, Kevin Stover <[email protected]>
wrote:
It's been this way since the first ham hooked a radio up to a windows
serial port.
It's not a radio issue it's an computer issue. Linux does it too.
I reboot my computers once a week whether they need it or not. Same with
the radios....they just get turned back on when the computer is up at a
desktop.
On 10/12/2014 6:47 PM, Don Wilhelm wrote:
All,
While Joe's response will eliminate the behavior, I feel that a fuller
explanation is in order.
When a computer boots, it will "exercise" the RS-232 signal lines
including the RTS and DTR signal lines.
If you have your K3 set to do keying or PTT with those lines, you can
expect the K3 to go into transmit while the computer does its boot-up.
So, take your choices - if you have no need for DTR/RTS keying of the K3,
turn the PTT-KEY menu to OFF-OFF as Joe indicated, but if you have need for
computer control of the PTT or Keying of the K3 via the DTR or RTS signals,
then expect that behavior and either place the K3 into TX TEST or switch to
a dummy load while the computer is "doing its diagnostics" during the
boot-up cycle.
73,
Don W3FPR
--
R. Kevin Stover
AC0H
ARRL
FISTS #11993
SKCC #215
NAQCC #3441
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