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@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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