Steve,
Why wouldn't the MIL-STD-118-110x (FS-1052) and high speed serial tone modes
not be legal under Part 97?
There used to be a bunch of hams on the East Coast who ran the Fredericks(sp)
version of the Harris Serial Tone Modem on HF and at least one was an FCC
engineer. One of the groups
Why not run 64 tones with FSK at 50 baud or 64 tones with OQPSK at 50 baud?
Shucks, for that matter how about 128 tones using QAM64 at 50 baud?
Walt/K5YFW
-Original Message-
From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED]
Sent: Tuesday, August 29, 2006 7:06 PM
To:
Hi Walt,
I guess you mean the Frederick 1102 made under license from Harris?
I have one of those actually. They are strictly to the standard,
1800hz PSK carrier, 2400bps symbol rate, the needed channel BW is
300-3300hz (3Khz) at any supported data rate (75-2400bps coded). Its
that symbol
i have a tigertronics sl1 plus and a yaesu ft-817nd,
looking for a inexpensive pocket pc,the type with the folding screen
can anyone tell what would work?
windows ce or windows mobile?
like to try psk31,rtty portable
thanks jack n9iif
Need a Digital mode QSO? Connect to
What is this 300 symbol/sec limit? I don't see that in Part 97.
§97.305(c) of this Part.
(1) No angle-modulated emission may have a modulation index greater
than 1 at the
highest modulation frequency.
(2) No non-phone emission shall exceed the bandwidth of a
that symbol rate, its to high, it exceeds the 300 symbol/sec limit
per FCC Part 97.
Why would the symbol rate be an issue in the regulations? Why would
anything like that matter if the data is constrained by bandwidth? Or is
the basis of the our rules are holding you back statements by the
I'm not a lawyer either, Walt, but the 300 baud symbol rate
limitation from §97.305(c)(3) below applies to a RTTY or data
emission, not the individual components of that emission IMHO.
You and I have discussed this potential loophole in the past, and my
advice was to run it up the flagpole
Walt and group,
My understanding is that the 64QAM mode of the DRM programs being used
by SSTV operators does not work well on HF frequencies unless you have
near perfect conditions.
What are the opinions on the how well multipath and difficult
conditions are handled by these different
Hi all,
I´m thinking about to build Elecraft K2 kit with SSB option for
working in digital modes, but I have received some comments about this
rig is not enought apropiate for digital modes because it hasn´t
enought stability It has a very good receiver and CW transceiver, but
not for digital
The 300 baud issue was something that the ARRL Digital Voice Working
Group Task Force brought up in Jan 2003:
http://www.arrl.org/announce/reports-03/digi-voice.html
In their minutes, under item 3B: B) Support a rule interpretation that
allows multimedia operation based on the primary content
--- In digitalradio@yahoogroups.com, Nacho [EMAIL PROTECTED] wrote:
Hi all,
I´m thinking about to build Elecraft K2 kit with SSB option for
working in digital modes, but I have received some comments about this
rig is not enought apropiate for digital modes because it hasn´t
enought
Is anyone doing Pactor 1 on HF, and if so what HF freqs can I find some
activity.
73's, Art
Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org
Other areas of interest:
The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/
DigiPol:
Yes Art there is a lot of Pactor 1 on the air.
You have to look for it as most are using the sound card modes.
But those of us that have the hardware are all over the place.
Most don't see us because they are hanging out around
14,070.
John, W0JAB
At 09:56 PM 8/30/2006, you wrote:
Is anyone
It appears that USA hams are the only ones in the world operating
under the thumb of such an obsolete 300 baud limit for digital data
on HF! As far as I have been able to research, the rest of the world's
hams have no such 300 baud limitation placed upon them.
The USA FCC rule is 300 baud
Steve,
Ideally, it would be something you would want to share as a
collaborative effort. Without this type of effort on the part of a few
hams (Patrick being one, along with Dave's DX Lab software), we would
not have the incredible synergy that these two programs bring to nearly
any amateur
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