Tnx Dave, I will keep that in mine.
Thanks Russ NC5O
1- Whoever said nothing is impossible never tried slamming a revolving door!
2- A government big enough to give you everything you want, is strong enough to
take everything you have.
- Gerald Ford
" IN GOD WE TRUST "
Russell Blair (NC5O)
Skype-Russell.Blair
Hell Field #300
DRCC #55
30m Dig-group #693
Digital Mode Club #03198
________________________________
From: Dave Sparks <dspa...@pobox.com>
To: digitalradio@yahoogroups.com
Sent: Thu, July 22, 2010 6:41:35 PM
Subject: Re: [digitalradio] Re: Question on bandwidth on HF (n9dsj)
JTMS is 1500 BPS? Could it exceed the 300 baud limit on a single carrier,
like PSK500 does? That wouldn't strictly be a B/W issue, but it would be a
rule violation on HF.
--
Dave Sparks -- AF6AS
----- Original Message -----
From: "n9dsj" <n9...@comcast.net>
To: <digitalradio@yahoogroups.com>
Sent: Thursday, July 22, 2010 4:26 PM
Subject: [digitalradio] Re: Question on bandwidth on HF (n9dsj)
Hi Russell,
Not sure (I am not the lawyer in my family:) but suspect due to its signal
rate it is legal. I asked the question on the HF JT65 board but no
definitive response. ISCAT is 23 baud at 1500 Hz and JTMS is 1500 bps and
the bandwidth 2250 Hz. You are correct that it may be more of an issue as to
where in the band you were transmitting more so than the legality of its
usage. I am not sure of the advantage of ISCAT on HF, aside from perhaps on
a scatter path to 10/12 meters and it is down 10 dB or so in sensitivity
from JT65/JT8/JT2/JT4 modes; albeit uses a 30 second sequence like JT6M. I
have only previously seen it used on 6 meters and above. Of course some
people simply do not like the wider modes in general, hence the inevitable
controversy.
73,
Bill N9DSJ
