The remote user cannot determine that the frequency is clear at the
PMBO's QTH. The frequency could be clear at the remote user's QTH,
but busy at the PMBO's QTH. When the remote user initiates a
connection, the PMBO QRMs an ongoing QSO.
Have you never responded to a CQ, only to have someone else send
QRL! because you didn't listen long enough to verify that the
frequency was clear on your end? In CW or phone, communication with
a station that unintentionally QRMs an ongoing QSO is
straightforward, and quickly eliminates the QRM.
But when an ongoing PSK or RTTY QSO is QRM'd by a Pactor station,
the probability that the QRM'd station can even decode the QRMing
signal is low. If the QRM'd station does have a Pactor modem to fire
up, all the operator can do it determine the Pactor station's
callsign; there's no way to convey QRL!
73,
Dave, AA6YQ
--- In digitalradio@yahoogroups.com, John Becker <[EMAIL PROTECTED]> wrote:
>
> I for one Don't think it's the fault of the PMBO "robot" as
> much as the remote user. But, then again it's hard to say
> sitting at this location if the remote station listen at all or
> just did not hear a QSO going on. It's impossible to ask if
> the frequency is in use on all modes.
>
> As a RTTY, Amtor & Pactor lover I have been watching
> the PSK part of the band for about 2.5 years and again
> from here don't see a big QRM problem.
>
> This problem is not new. It's been going on for the last
> 35 years that I know of going back to the early 70's with the
> RTTY WRU systems.
>
> John, WØJAB
>
> At 04:57 PM 10/24/05, you wrote:
>
> >I don't think so.
> >
> >The quoted message was NOT about code to prevent QRMing an
existing
> >QSO, which I'm pretty sure everyone on the list would agree is a
good
> >idea, if not mandatory. Replacing "robot lids" with "robot
> >considerate ops" is surely progress. :-)
>
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