The table in §97.305 (Authorized emission types) indicates that
§97.307(f)(3) applies to all use of RTTY or data emission types in the
amateur bands below 28 mhz.
§97.307(f)(3) says Only a RTTY or data emission using a specified digital
code listed in §97.309(a) of this Part may be transmitted.
All,
Would like to run a few tests with Contestia (16/1K) and MT63 (1K) this
evening. The goal is to see if sensitivity simulations compare well with on-air
testing. Contestia should have an advantage since the peak-to-average output is
much better. Not sure about it's QRM resistance.
The
QRV - 14108.0 USB
- Original Message -
From: Tony d...@optonline.net
To: digitalradio@yahoogroups.com
Sent: Wednesday, March 25, 2009 4:14 PM
Subject: Contestia / MT63 Skeds pse
All,
Would like to run a few tests with Contestia (16/1K) and MT63 (1K) this
evening. The goal is to see
FCC say a RTTY or data emission using a digital code specified in this
paragraph may use any technique whose technical characteristics have
been documented publicly
I can't see that you've got any bandwidth restriction on HF subject to each
individual carrier having a maximum symbol rate of 300
Tony,
Glad you are doing this! I have been thinking about using Contestia for MARS
in conjunction with MT63 for messaging.
Unfortunately, I have one net to call tonight and one to checkin to, so will
have to wait to see the results of your tests.
Unless Conestia is especially good in other
There is unquestionably a bandwidth restriction on HF for frequency-shift
keying, though there could be debate about what mark and space mean for
FSK modes with more than 2 tones; the intent, however, seems clear enough.
Consuming 150 kHz of HF spectrum to convey 300 baud using something other
Usually , every week,we get at least one new member that indicates they are new
to PSK. So, what advice would you give to those hams that are about to embark
on the digital frontier ? Your top three things ??
I think it is a few weeks away from being released. I should make it
clear it is NOT a NEW MODE, just new software that makes JT65A on HF a
lot easier.
Andy K3UK
2009/3/25 Gmail - Kevin, Natalia, Stacey Rochelle spar...@gmail.com:
Andrew,
Any news when this digital mode might be out to
No ALC.
No Linear amps.
Lowercase much faster and less error-prone that uppercase.
Simon Brown, HB9DRV
www.ham-radio-deluxe.com
- Original Message -
From: Andrew O'Brien k3uka...@gmail.com
Usually , every week,we get at least one new member that indicates they
are new to PSK. So,
1. Start with PSK31 and transceiver turned to 14.070, USB
2. Start with DigiPan
3. Read the DigiPan Help (http://home.comcast.net/~hteller/DigiPan.pdf) if you
are using VISTA ;-)
73, Skip KH6TY
http://kh6ty.home.comcast.net
- Original Message -
From: Andrew O'Brien
To:
Hello to all,
Here is what I noted on my help file. In fact I found Contestia is a very good
compromise (a small loss in S/N compared to Olivia with a double speed, but
without small letters).
However, I don't like RTTYM due to the fact that you have the same problem as
in RTTY: you can
1. Make sure you are putting out a pure signal. Don't overdrive the rig (make
sure ALC is showing 0) and check the output of your soundcard on an
oscilloscope. Have your software generate a sine wave and make sure it looks
like one on the scope. Stairsteps, excessive FM or
I have subscribed to the Fldigi group but I needed to ask if anyone is using
Fldigi 3.0 and if so I cant get program to talk to the Kenwood TS450s using Cat
cable the cable works fine with other programs, , I did download the rig file
and put it the folder for rigs, at the bottom the error is
Then once they get their feet wet, move on the HRD and DM780!!!
Randy
*1. Watch my PSK videos.*
I have five videos posted.. The first video show you hoe to get receiving
in a few minutes.
http://www.youtube.com/user/K7AGE
2. Install Digipan
3. Become radio active!
Thousands have watched these videos and I receive email almost daily from
guys getting on PSK.
Skip,
The band is in great shape this evening (as of 23:30 utc) but there doesn't
seem to be any Contestia / MT63 ops around. I'll be QRV on 14108.0 USB for
while.
Glad to help out and I'll be sure to switch between modes quickly to avoid band
changes.
Tony -K2MO
- Original
Hello Skip!
There are too many choices, which is one reason I lurk here picking the brains
of people who have evaluated a lot of them.
Which of the many digital modes ends up as MARS standards must be decided by
the State, Region and Service MARS directors. I have heard MT63 2000 Hz,
Patrick,
Thanks for that information. Is it safe to say that the SNR difference between
Contestia and Olivia stays the same as long as the tone and bandwidth
configurations are the same?
Can you also tell us what the approximate peak-to-average output is for MT63? I
understand it's near
Yes, Randy... they are very good videos.
Andy K3UK
On Wed, Mar 25, 2009 at 6:02 PM, Randy Hall listk7...@gmail.com wrote:
1. Watch my PSK videos.
I have it working with a TS2000 and XP.
Andy K3UK
On Wed, Mar 25, 2009 at 6:43 PM, Russell Blair
russell_blai...@yahoo.com wrote:
I have subscribed to the Fldigi group but I needed to ask if anyone is using
Fldigi 3.0 and if so I cant get program to talk to the Kenwood TS450s using
Cat
Hello Tony,
Thanks for that information. Is it safe to say that the SNR difference between
Contestia and Olivia stays the same as long as the tone and bandwidth
configurations are the same?
Yes it is always about 1.5 dB as long as the tone and bandwidth configurations
are the same.
Can you
Hi Andy, well I cant seem to get to work here with my TS450s, The radio works
Commander, HRD, MMTTY, and a few others. I just dont know what to do next, So I
need some information about what to change in the rig scrip to get to talk to
the raadio.
Russell
Yesterday is HISTORY. Tomorrow is a
Tried calling CQ with Contestia 16/1000 when I first saw your e-mail
post. Right now at ~ 0050Z I heard you and could only copy bits and
pieces with Contestia. Switched to MFSK16 but probably not fully locked
in with Multipsk which I have not used as much and more familiar with
fldigi's way of
Andy where do you edit the port configuration (Speed=4800, Bits=N81, RTS=1 or
Hi). I looked in that rig scrip and did see it anywhere ? Is there a ANI file
some where?
Russell
Yesterday is HISTORY. Tomorrow is a MYSTERY. Today is a GIFT! Thats why its
called the PRESENT!
IN GOD WE TRUST
Rick,
Same here; copied some of your signal on both Olivia and MFSK16.
Also, nearly impossible to tune in since you have to guesstimate where
to put the cursors even though you are close to 14108 +1000 Hz.
Seems to tolorate some off-tuning -- about +/- 150Hz or so. I should have
mentioned
Dave AA6YQ wrote:
There is unquestionably a bandwidth restriction
on HF for frequency-shift keying,
Hi Dave,
Sorry, old friend, but you are incorrect.
In the USA data/RTTY bands 160meters-10meters,
the FSK rule is a shift restriction. It is
not a bandwidth restriction.
The attempt
I have it set up to use HAMLIB and have the TS2000 chosen in the drop
down list. I have that tiny diamond filled in that says PTT VIA
HAMLIB COMMAND . Rig control and PTT is thus on the same comm port.
What interface are you using ?
Andy K3UK
On Wed, Mar 25, 2009 at 8:57 PM, Russell Blair
I never did any editing, I just used the file that I downloaded from
the web site.
Andy
On Wed, Mar 25, 2009 at 9:35 PM, Russell Blair
russell_blai...@yahoo.com wrote:
Andy where do you edit the port configuration (Speed=4800, Bits=N81, RTS=1
or Hi). I looked in that rig scrip and did see it
--- In digitalradio@yahoogroups.com, Andy obrien k3uka...@... wrote:
I never did any editing, I just used the file that I downloaded from
the web site.
Andy
I get confused about the diffefrence , in FLDIGI, between CAT control and
HAMLIB. I simply used the HAMLIB and then chose a
-Bonnie, can you explain to this bozo what the difference between a shift
restriction and bandwidth restriction would be? My brain viewed them to be
the same, that is that a 170Hz shift would be roughly that amount of Hz wide at
the usual ham speed.
Andy K3UK
Hi Andy,
There is no simple universal relationship between
the shift and the transmitted signal bandwidth,
because there are so many factors other than shift
that contribute to the bandwidth of an FSK signal:
1. Symbol rate
2. Shape of waveform
3. Symbol transition point
4. Filtering
5.
Dave, AA6YQ wrote:
Do you think its a good idea for amateurs to
transmit 150 Khz-wide signals on HF bands
like 20m that are 350 Khz wide?
Hi Dave,
Yes. There are certainly conditions now that
would be perfectly fine for 150kHz bandwidth
signals to be used at power levels that would
Thanks.
To repeat my first question, What's the bandwidth of an FSK signal whose
shift is 1 kHz and whose symbol rate is limited to a maximum of 300 baud?
Feel free to parametize as necessary.
73,
Dave, AA6YQ
-Original Message-
From: digitalradio@yahoogroups.com
Dave AA6YQ wrote:
What's the bandwidth of an FSK signal whose
shift is 1 kHz and whose symbol rate is limited
to a maximum of 300 baud?
Hi Dave,
The question provides insufficient data to
derive a simple universal answer.
Bonnie KQ6XA
Tony, I think I heard Contestia, but too weak to copy. Also, the frequency is
pulled a lot by noise and static.
73, Skip KH6TY
http://kh6ty.home.comcast.net
- Original Message -
From: Tony
To: digitalradio@yahoogroups.com
Sent: Wednesday, March 25, 2009 4:35 PM
Subject:
Re The question provides insufficient data to derive a simple universal
answer.
That's why I suggested that you freely parametize. Please identify the
significant factors, represent each with a variable, and state the bandwidth
in terms of those variables as well as the maximum shift and symbol
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