NEWQPSK tests
Hamish Moffatt
Hi all,
Is anyone interested in doing some NEWQPSK testing with me on HF
this weekend? I haven't done any more testing since my beacon experiment
of several months ago and I'd like to try it again.
Hamish
--
Hamish Moffatt VK3SB <ham...@debian.org> <ham...@cloud.net.au>
Kai Schulte
Hi Hamish,
> Is anyone interested in doing some NEWQPSK testing with me on HF
> this weekend?
How do the tests work, and what band(s) do you use? I'd love to give
psk31 a try but currently I don't have _any_ working short wave antennas,
so this would be good motivation to build/fix one :)
73 de Kai DF4EM
Hamish Moffatt
Hi Kai,
Well, I was going to arrange a time and frequency where we could
try to make contact. If nothing else I might leave a beacon running
one day this week, if there's anyone hear who would try to copy it.
I would be running Tomi's NEWQPSK modem for Linux, transmitting
AX.25 packets using the 'beacon' program. Would anyone try to decode
this if I set it up?
73,
Tomi Manninen OH2BNS
> Well, I was going to arrange a time and frequency where we could
> try to make contact. If nothing else I might leave a beacon running
> one day this week, if there's anyone hear who would try to copy it.
>
> I would be running Tomi's NEWQPSK modem for Linux, transmitting
> AX.25 packets using the 'beacon' program. Would anyone try to decode
> this if I set it up?
Unfortunately I'm now back from my vacation and HF antennas are a problem
but I might try to set up something.
By the way if anyone here in EU is trying to connect to Joni's NEWQPSK
station at 3590.0kHz LSB, it's now running 2500bps (8000sps),
interleave=8 and fec=3. After some tests we decided that the 3000bps
(9600sps) mode is too wide for most ham rigs and the high and low
carriers are unnecessarily attenuated and performance thus degraded.
2500bps is much better at least in that sense.
--
Tomi Manninen Internet: oh2...@sral.fi
OH2BNS AX.25: oh2...@oh2rbi.fin.eu
KP20ME04 Amprnet: oh2...@oh2rbi.ampr.org
Ken Koster
> > > Is anyone interested in doing some NEWQPSK testing with me on HF
> > > this weekend?
> >
> > How do the tests work, and what band(s) do you use? I'd love to give
> > psk31 a try but currently I don't have _any_ working short wave antennas,
> > so this would be good motivation to build/fix one :)
>
> Hi Kai,
>
> try to make contact. If nothing else I might leave a beacon running
> one day this week, if there's anyone hear who would try to copy it.
>
> I would be running Tomi's NEWQPSK modem for Linux, transmitting
> AX.25 packets using the 'beacon' program. Would anyone try to decode
> this if I set it up?
I'd be interested.
I've been trying to get a couple of the local guys interested enough to do
local testing, but everyone is a bit too busy right now, or they don't have
their PC's tied to their HF rigs yet.
I'd be willing to setup a periodic beacon while I'm home in the evening
(approx. 0300-1400 GMT). Since I'm in northwest Washington state picking a
frequency that has half a chance of making it between us is going to be the
difficult part.
Ken, N7IPB -
w7...@aol.com
73, Gary, W7NTF
Ken Koster
> Why don't you guys just go to 20m, around 14.070, and tune around? There's dozens of PSK31 signals there just about 24 hours per day, with the band being open... I've made many good contacts with guys running 3W output power and a dipole, both sides running DigiPan... Why reinvent the wheel when there's worldwide PSK31 stuff coming in on 20M most of the day/night?
>
> 73, Gary, W7NTF
It's not PSK-31, it's NEWQPSK which is a totally different mode.
Ken
Tomi Manninen
> Why don't you guys just go to 20m, around 14.070, and tune around?
> There's dozens of PSK31 signals there just about 24 hours per day,
> with the band being open... I've made many good contacts with guys
> running 3W output power and a dipole, both sides running DigiPan...
> Why reinvent the wheel when there's worldwide PSK31 stuff coming in on
> 20M most of the day/night?
NEWQPSK has _nothing_ to do with PSK31. Instead it has much more to do
with MT63. (both were "invented" by the same person, Pawel SP9VRC)
NEWQPSK (aka Q15X25) is an AX.25 modem using 15 parallel (OFDM) tones
modulated with DQPSK. Symbol rate with 8000sps is 83.333baud which
translates to 2500 bits per second raw bit rate. There are three different
levels of FEC that reduce the payload down to 833.3 bps.
The modem takes about 2000Hz of bandwidth so it is something you
definitely do NOT want to run on 14.070 !!!
My code is a port of the original Motorola 56k assembler code to Linux
and C.
Tom Gunn
info I've beeen able to locate seems to concentrate on speed and
bandwidth.
BTW; I've been running PSK under Linux for about 3 months. I've never
talked to (or monitored) anyone else running Linux. There are various
packages -- all running under some variety of Windows. :(
Tom Gunn
tg...@esper.com WD4JQX
----------------------------
"I have no eyebrows." - Anonymous Participant (immediately following
first-ever fire-breathing attempt).
On Mon, 24 Jul 2000, Ken Koster wrote:
> On Mon, 24 Jul 2000, w7...@aol.com wrote:
> > Why don't you guys just go to 20m, around 14.070, and tune around? There's dozens of PSK31 signals there just about 24 hours per day, with the band being open... I've made many good contacts with guys running 3W output power and a dipole, both sides running DigiPan... Why reinvent the wheel when there's worldwide PSK31 stuff coming in on 20M most of the day/night?
> >
Hamish Moffatt
> I've been trying to get a couple of the local guys interested enough to do
> local testing, but everyone is a bit too busy right now, or they don't have
> their PC's tied to their HF rigs yet.
Similar story here. Also, not many Linux- using hams either.
> I'd be willing to setup a periodic beacon while I'm home in the evening
> (approx. 0300-1400 GMT). Since I'm in northwest Washington state picking a
> frequency that has half a chance of making it between us is going to be the
> difficult part.
There should be propagation at some time during that period on 20 metres,
around 0900 I would guess. I was intending to run the beacon for a few
days while I am at work (2200-0800Z), but could do an evening also
(until about 1200Z). The equipment is too noisy to leave running overnight.
(The FT-847's cooling fan runs continuously!)
Jim Darrough
Regards es 73 de Jim, KI7AY CN84
----------------------------------------------------
j...@ki7ay.com
http://www.clipper.net/~jed
If you have ICQ you can message me. My ICQ#:28238084
Download icq @ http://www.icq.com/
Tim Dawson
psk31 stuff (twpsk and gpsk31, with gpsk31 being my preference, at least for
now.) Just starting to play with TCP/IP over ax25 . . .
I suspect that there are quite a few of us Linux hams out here, although we
may not be the worlds most vocal crowd.
- Tim
--
================================================================================
Tim Dawson (tada...@tpcsvc.com) Owner/Engineer
TPC Services Bellnet: (972)-221-7385
Lewisville, Texas 75067 FAXnet: (972)-221-0393
"The world is complex. Sendmail.cf reflects this...."
James R. Saker Jr.
What kind of TNC are you using for your TCP/IP over ax25? I've just got my Linux
laptop compiled with the 2.2.14 kernel supporting 6PACK and KISS for my KPC-3+.
Jamie Saker
KC0ILP
Tim Dawson wrote:
--
James R. Saker Jr.
Vice President, Internet Services
Pensat International Communications, Inc.
e: jsa...@pensat.com
v: 402.398.8124
f: 402.398.8121
Akihiro KODA
>> I suspect that there are quite a few of us Linux hams out here, although we
>> may not be the worlds most vocal crowd.
I wish I could...
In Japan, there is a problem due to the license.
Even the MT63 mode is NOT legaly allowed.
Akihiro KODA / co...@post.kek.jp / jl3oxr
KEK-MSL +81-298-64-5199(tel) 5623(fax)
Tom Gunn
Can't say they were using linux, but they were PSK31. Exactly what is the
license restriction?
Tom Gunn WD4JQX
tg...@esper.com
----------------------------
"I have no eyebrows." - Anonymous Participant (immediately following
first-ever fire-breathing attempt).
Akihiro KODA
>> That's interesting. I've talked to several Japan-based PSK stations.
>> Can't say they were using linux, but they were PSK31. Exactly what is the
>> license restriction?
Sorry, I mean, the problem is about licensing for the NEWQPSK mode.
PSK31 mode is allowed in Japan.
Eamon Skelton
On 26-Jul-2000 Akihiro KODA wrote:
> In Japan, there is a problem due to the license.
> Even the MT63 mode is NOT legaly allowed.
I wouldn't want to incite anyone to break the law, but
beware of taking the licence conditions too literally.
From the Irish radio experimenters licence:
8. No period of sending shall exceed ten consecutive minutes
duration and each period of sending shall be followed by a
period of not less than three minutes listening-in on the
frequency used.
This makes it impossible to use packet or PSK and very
difficult to use SSB or CW.
73, Ed. EI9GQ.
--
"In theory there is no difference between theory and practice.
In practice there is."
Albert Einstein
Linux 2.2.12-20
Richard Adams
> On 26-Jul-2000 Akihiro KODA wrote:
>
> > In Japan, there is a problem due to the license.
> > Even the MT63 mode is NOT legaly allowed.
>
>
> I wouldn't want to incite anyone to break the law, but
> beware of taking the licence conditions too literally.
>
>
> >From the Irish radio experimenters licence:
>
> 8. No period of sending shall exceed ten consecutive minutes
> duration and each period of sending shall be followed by a
> period of not less than three minutes listening-in on the
> frequency used.
>
> This makes it impossible to use packet or PSK and very
> difficult to use SSB or CW.
Murphy's law Nr, 1115 ??
>
> 73, Ed. EI9GQ.
>
> --
>
>
> "In theory there is no difference between theory and practice.
> In practice there is."
> Albert Einstein
>
> Linux 2.2.12-20
--
Regards Richard
pa3...@zeelandnet.nl
http://people.zeelandnet.nl/pa3gcu/
Ray Wells
0k3 packet on 10.146 for mail forwarding.
Regards ... Ray VK2TV@VK2TV
Tim Dawson
Up until recently, and MFJ1270C in kiss mode. Two weeks ago at a hamfest, I
got a KAM Plus for cheap, and have upgraded thereto. Both seem to work just
fine, although I like the KAM 'cuz I can do RTTY/Pactor, etc. The MFJ is
getting 'demoted' to mobile use for APRS.
- Tim, N8EAU
>Tim --
>
>What kind of TNC are you using for your TCP/IP over ax25? I've just got my Linux
>laptop compiled with the 2.2.14 kernel supporting 6PACK and KISS for my KPC-3+.
>
>Jamie Saker
>KC0ILP
>
>
>
>
>Tim Dawson wrote:
>
>> I too am running Linux with the full AX25 packet implementation as well as the
>> psk31 stuff (twpsk and gpsk31, with gpsk31 being my preference, at least for
>> now.) Just starting to play with TCP/IP over ax25 . . .
>>
>> I suspect that there are quite a few of us Linux hams out here, although we
>> may not be the worlds most vocal crowd.
>>
>> - Tim
>>
>> > I'm running Linux. Have NEVER run anything else for psk-31. TWPSK.
>> >
>> > Regards es 73 de Jim, KI7AY CN84
>> >
>> > At 02:21 PM 7/24/00 -0400, you wrote:
>> > >I thought it was a different mode. What, briefly, is the difference? The
>> > >info I've beeen able to locate seems to concentrate on speed and
>> > >bandwidth.
>> > >
>> > >BTW; I've been running PSK under Linux for about 3 months. I've never
>> > >talked to (or monitored) anyone else running Linux. There are various
>> > >packages -- all running under some variety of Windows. :(
>> > >
>> > >
>> > >
>> > >
>> > >
>> > >Tom Gunn
>> > >tg...@esper.com WD4JQX
>> > >
>> > > ----------------------------
>> > >
>> > > "I have no eyebrows." - Anonymous Participant (immediately following
>> > > first-ever fire-breathing attempt).
>> > >