I would presume that the "reason" they didn't include "conventional" RTTY is
because of the excessive bandwidth. You can do the same thing with PSK-31
and MORE and with less power output. Add to that multiple simultaneous
users of the same channel! It’s a "natural" for "channelized" bandplan
channels.
73,
Sandy W5TVW
-----Original Message-----
From: Mike Morrow
Sent: Saturday, February 04, 2012 2:32 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] FCC 60m Band Change Rules Published
That channel will likely become the favorite 60 meter frequency for the
several military and vintage commercial radio USB nets because the
carrier frequency 5357 kHz can be precisely entered on units that can be
set only in 1 kHz increments. All other 60 meter USB channels require the
ability to set the unit on 0.5 kHz increments.
> It looks like there isn't ANY "normal" RTTY authorized, only PSK31. It
> would be hard to run "normal" RTTY with only a 60 Hz. bandwidth.
The rules mention only 60H0J2B and the discussion explains why, due to the
J2B designation, it is considered RTTY. The 2K80J2D Data mode seems to
refers to PACTOR-III. But isn't PACTOR-III a commercial and proprietary
protocol? The FCC seems to include it for some future use with non-ham
emergency networks.
So, the authorized emissions seem pretty simple:
150HA1A CW Morse telegraphy,
transmitter dial on the channel center frequency
2K80J3E USB phone,
transmitter dial 1.5 kHz below the channel center frequency
60H0J2B RTTY (PSK-31 sent on USB phone),
transmitter dial 1.5 kHz below the channel center frequency
2K80J2D DATA (PACTOR-III sent on USB phone),
transmitter dial 1.5 kHz below the channel center frequency
I guess the only thing not specified is where the PSK-31 signal shows up
above the carrier frequency. Don't most PSK-31 transmissions use
something around 1000 Hz?
I wish conventional 170 Hz FSK RTTY had been authorized. I don't know
why that would be worse than USB Phone or PACTOR-III.
73,
Mike / KK5F
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.1913 / Virus Database: 2112/4788 - Release Date: 02/04/12
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
