[RTTY] New Winlink usage

[Joe Subich, W4TV]

> So when station WD#??? calls RMS AA#?? then who is actually causing
> the interference? Well let's see if my old thinking is correct or not
> --- I think it would be the station that initiated the call to the
> RMS.

No *BOTH* stations are responsible for the interference - particularly
when the RMS system operator does not set his modem to enforce the
PACTOR 2 limit - keeping bandwidth less than 500 Hz - and the modems
automatically upshift to 2.4 KHz bandwidth.  Such behavior happens
*ALL THE TIME* and many RMS even *advertise* PACTOR 3 support outside
the "automatic control" sub=bands.

73,

    ... Joe, W4TV


On 4/22/2014 5:40 PM, nq4u at mtars.org wrote:
>
> I have been following this thread with great interest and some of the
> comments really surprise me. Especially the comments about interference
> being caused by the unattended WINLINK RMS.
> Now as for me, I do operate a WINLINK RMS for MARS use with Pactor 1
> thru 4. Also operate an amateur VHF 1200 baud packet WINLINK RMS for
> local use and training. I also enjoy operating CW and RTTY in contest
> and chasing DX.
>
> One of the things that folks need to remember about using the WINLINK
> system in the U.S. is that an operator (the end user) must initiate the
> contact to the RMS. It is legal for operators in some other countries to
> use the automated forward system on Amateur frequencies but not in the
> U.S. The RMS that is either listening on a single frequency or scanning
> five frequencies DOES NOT initiate the contact at least in the U.S
> amateur bands.
> So when station WD#??? calls RMS AA#?? then who is actually causing the
> interference? Well let's see if my old thinking is correct or not --- I
> think it would be the station that initiated the call to the RMS. That
> station did not listen to see if the frequency was in use before he or
> she transmitted.
>
> Just some food for thought.
>
> 73
> Jimmy
> NQ4U
>
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