Re: [digitalradio] Report on RFSM2400 vs. OFDM

[Leskep]

Re EasyPal

Did you use the latest version from the KC1CS  site?

Did you use the RS encoding  which is available in the program?

Did you have one end in Repeater mode which would give you a Quasi
ARQ type system?

Did you use a transmission mode suitable for the band conditions at the time?

There are many features in EasyPal which which are not well understood by many

I feel you should have come up with better figures than you did for the tests
There is also a difference in transmitting  a compressed picture or sending
the file as an Anyfile which is the complete - uncompressed file

Les VK2DSG






From: Rick 
Sent: Saturday, January 26, 2008 3:49 PM
To: digitalradio@yahoogroups.com ; [EMAIL PROTECTED] 
Subject: [digitalradio] Report on RFSM2400 vs. OFDM


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Re: [digitalradio] Happy Australia Day

[John Simon]

Many thanks Andy.   Ahhh but if it is too cold you can always put on another 
jumper or move closer to the fire.
 If it is 120 Deg' Farenheight   (sp?) and you are in the nude, you can't 
take anymore clothes off can you?


  73, John de VK2XGJ
 One of the reasons politicians try so hard to get themselves re-elected,
   because they couldn't live under the laws that they have passed!

- Original Message - 
From: "Andrew O'Brien" <[EMAIL PROTECTED]>
To: 
Sent: Saturday, January 26, 2008 3:04 PM
Subject: [digitalradio] Happy Australia Day


> Happy Australia Day to all our VK members.  Hope the weekend is not too
> hot for you, Melbourne looked nice and warm on TV today.  Better than
> the  18 inches of snow I have outside my house!
>
> Andy K3UK
>
>
>
> Announce your digital presence via our Interactive Sked Page at
> http://www.obriensweb.com/sked
>
>
> DRCC contest info : http://www.obriensweb.com/drcc.htm
>
> Yahoo! Groups Links
>
>
>
>
>
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.516 / Virus Database: 269.19.11/1244 - Release Date: 
> 1/25/2008 7:44 PM
>
> 

Re: [digitalradio] Report on RFSM2400 vs. OFDM

[Leskep]

Hi Rick
Regarding RFSM2400/8000
I wonder if you both set up your sound card offsets in the program 
Options/Hardware  
This program does require a fairly correct sample rate setting on 
both TX and RX to achieve full speed
On tests done here on a fairly quiet band on 40m and 80m
before just before sunset there has been no problem to achieve
speeds as the records show below

BTW  Our testing has been done with RFSM8000 which has the ability
to work at  bits per second

The times shown below are in the afternoons on a relatively quiet band
and over a distance of 250 klm for VK2KNC and 400 klm for VK2JN




'VK2KNC' accept MAIL-requests. - 4/11/2007 - 3:09:32 PM
Receiving file '0101vlrg.jpg', compressed size 87920 bytes, from 'VK2KNC'... - 
4/11/2007 - 3:10:01 PM
File '0101vlrg.jpg' received succesfully, all time 406 sec, average speed 1930 
(1730) bits/sec - 4/11/2007 - 3:17:01 PM
Disconnected from 'VK2KNC' - 4/11/2007 - 3:17:15 PM

Sending request for file 'stop7.jpg'... - 18/11/2007 - 3:33:46 PM
Receiving file 'stop7.jpg', compressed size 15840 bytes, from 'VK2JN'... - 
18/11/2007 - 3:33:59 PM
File 'stop7.jpg' received succesfully, all time 39 sec, average speed 3240 
(3231) bits/sec - 18/11/2007 - 3:34:53 PM
Sending request for file 'Recycle.jpg'... - 18/11/2007 - 3:35:32 PM
Receiving file 'Recycle.jpg', compressed size 43945 bytes, from 'VK2JN'... - 
18/11/2007 - 3:35:45 PM
File 'Recycle.jpg' received succesfully, all time 126 sec, average speed 2779 
(2777) bits/sec - 18/11/2007 - 3:38:07 PM
Disconnecting from 'VK2JN' - 18/11/2007 - 3:39:21 PM



Sending request for file 'closeeyes5.jpg'... - 20/11/2007 - 4:02:27 PM
Receiving file 'closeeyes5.jpg', compressed size 75482 bytes, from 'VK2JN'... - 
20/11/2007 - 4:02:38 PM
File 'closeeyes5.jpg' received succesfully, all time 195 sec, average speed 
3095 (3089) bits/sec - 20/11/2007 - 4:06:09 PM
Disconnecting from 'VK2JN' - 20/11/2007 - 4:06:54 PM


Sending file 'Cycle24predictions.jpg', compressed size 65750 bytes (real size 
76145 bytes), to 'VK2KNC'... - 18/12/2007 - 1:49:17 PM
Connecting to POP3-server... - 18/12/2007 - 1:49:58 PM
Connected to POP3-server... - 18/12/2007 - 1:49:58 PM
Doing authentification... - 18/12/2007 - 1:49:58 PM
Checking incoming mail... - 18/12/2007 - 1:49:59 PM
POP3-server has 0 incoming mails. - 18/12/2007 - 1:49:59 PM
Stop checking incoming mail. - 18/12/2007 - 1:49:59 PM

[I cut some server stuff out]

Connecting to POP3-server... - 18/12/2007 - 1:54:00 PM
Connected to POP3-server... - 18/12/2007 - 1:54:00 PM
Doing authentification... - 18/12/2007 - 1:54:00 PM
Checking incoming mail... - 18/12/2007 - 1:54:00 PM
POP3-server has 0 incoming mails. - 18/12/2007 - 1:54:00 PM
Stop checking incoming mail. - 18/12/2007 - 1:54:00 PM

File 'Cycle24predictions.jpg' sended succesfully, all time 05:08 (mm:ss), 
average speed 1975 (1705) bits/sec - 18/12/2007 - 1:54:25 PM

You might like to compare some of the above figures taken from the sys_log.txt 
from RFSM8000

Les VK2DSG





From: Rick 
Sent: Saturday, January 26, 2008 3:49 PM
To: digitalradio@yahoogroups.com ; [EMAIL PROTECTED] 
Subject: [digitalradio] Report on RFSM2400 vs. OFDM


Andy, K3UK and I had a very interesting experience this evening testing 
several sound card modes on the lower end of the 40 meter voice/image 
portion of the band. I have been wanting to do some comparison of the 
single tone high speed MIL-STD/FED-STD/STANAG modem in the RFSM2400 
program with a multi tone OFDM modem.

Signals were not that good between our locations, with deep QSB at 
times. Which was good for testing purposes. Andy running 100 watts and I 
running barefoot at times and up to about 250 watts when running digital 
(more on SSB).

Once a minor glitch was taken care of, we discovered that the program is 
extremely easy to use. Just enter the station you wish to connect with 
and the negotiation is done by the software. There are some additional 
windows that can be opened that provide feedback on the actions being 
done. One window can be opened that includes an oscilloscope like 
screen that displays what appears to be a real time constellation of 
the received signal. Very impressive.

Since we can only use this technology for sending image/fax here in the 
U.S., we elected to send some moderate sized jpeg images. I sent Andy a 
file that was 28521 bytes and it took 731 seconds to make the transfer 
which figures out to 312 bps. The software gives you this information 
upon completion of the file transfer.

Andy then sent me a file of 7323 bytes which took 197 seconds or 295 bps.

The software will display the received S/N ratio on screen and between 
each packet will update the transmitting station with how well the 
signal is (or isn't) being received with a S/N number. Even when I was 
only running 25 watts and turned off the amplifier, there was some 
throughput but it was reduced. The general report that I saw was 5 db 
S/N without and 10 dB with the amplifier. I would have exp

Re: [digitalradio] Happy Australia Day

[Leskep]

Thank you Andrew - well temp here in Duri is 29c at 4 pm 
Would not like the 18 inches of snow out my door - only see
snow maybe twice a year on the ranges 50 klm to the east of this
location
You also have a nice day
Les VK2DSG


From: Andrew O'Brien 
Sent: Saturday, January 26, 2008 3:04 PM
To: digitalradio@yahoogroups.com 
Subject: [digitalradio] Happy Australia Day


Happy Australia Day to all our VK members. Hope the weekend is not too 
hot for you, Melbourne looked nice and warm on TV today. Better than 
the 18 inches of snow I have outside my house!

Andy K3UK



 

[digitalradio] Report on RFSM2400 vs. OFDM

[Rick]

Andy, K3UK and I had a very interesting experience this evening testing 
several sound card modes on the lower end of the 40 meter voice/image 
portion of the band. I have been wanting to do some comparison of the 
single tone high speed MIL-STD/FED-STD/STANAG modem in the RFSM2400 
program with a multi tone OFDM modem.

Signals were not that good between our locations, with deep QSB at 
times. Which was good for testing purposes. Andy running 100 watts and I 
running barefoot at times and up to about 250 watts when running digital 
(more on SSB).

Once a minor glitch was taken care of, we discovered that the program is 
extremely easy to use. Just enter the station you wish to connect with 
and the negotiation is done by the software. There are some additional 
windows that can be opened that provide feedback on the actions being 
done. One window can be opened that includes an oscilloscope like 
screen  that displays what appears to be a real time constellation of 
the received signal. Very impressive.

Since we can only use this technology for sending image/fax here in the 
U.S., we elected to send some moderate sized jpeg images. I sent Andy a 
file that was 28521 bytes and it took 731 seconds to make the transfer 
which figures out to 312 bps. The software gives you this information 
upon completion of the file transfer.

Andy then sent me a file of 7323 bytes which took 197 seconds or 295 bps.

The software will display the received S/N ratio on screen and between 
each packet will update the transmitting station with how well the 
signal is (or isn't) being received with a S/N number. Even when I was 
only running 25 watts and turned off the amplifier, there was some 
throughput but it was reduced. The general report that I saw was 5 db 
S/N without and 10 dB with the amplifier. I would have expected 
something closer to 10 dB difference. When receiving the S/N appears to 
be close to real time on the receiving stations display and with QSB was 
all over the place with peaks at around 15 dB, but dropping down to 4 dB 
and I believe that I did see some negative numbers but would like to 
test this further.

The point of all this is that it is possible to send data, even if 
fairly slowly. The ~ 300 bps speed roughly equates to 37 bytes per 
second or 370 wpm if you were sending uncompressed text. I don't know if 
any compression is added for the program, but perhaps not. That means 
that with text data we might be able to nearly double the throughput.

Next we tried to use EasyPal, currently a popular digital OFDM program 
used for SSTV. I sent a file that would normally be a bit too large but 
it compresses it down to a much smaller file although you can adjust the 
quality on that as well. The file size at the default value became 20K 
and was to be sent in 94 seconds. There were something over 180 blocks 
sent. Andy received  perhaps one sixth of them, but we suspected that it 
would take many tries to get the data through fully intact using the 
manually requested BSR system. This confirms that these OFDM programs 
tend to require a signal better than +5 dB and perhaps +7 to +10 is more 
reasonable for throughput to work well.

It does seem that the RFSM2400 single tone modem worked better than 
OFDM, but I wish we had a comparable ARQ OFDM mode that did the 
corrections on the fly. It would be very helpful to have more hams do 
further comparisons, under varying conditions, and share their experiences.

One thing that we need to test is how well that ~300 wpm throughput 
compares with FAE 400 and FAE 2000 under the same conditions. We would 
have had to move back down to the text data portions of the band to 
perform such a test.

I am available for further testing with these modes and other modes too, 
such as NBEMS and ALE/FAE 400, or other programs you would like to 
compare. Just think ... a year ago almost none of this existed for ham use.

Many thanks to the programmers who are helping us with the new sound 
card technologies.

73,

Rick, KV9U

Re: [digitalradio] Happy Australia Day

[David]

Hi Andy...Thank you for the HAD.wx is very warm here in North 
Queensland 32degC and a bit of humidity thrown in..you had better 
not walk outside or you might be a snowman...Andy  (Frosty) the snowman 
hi hi



73 David AX4BDJ



Andrew O'Brien wrote:


Happy Australia Day to all our VK members. Hope the weekend is not too
hot for you, Melbourne looked nice and warm on TV today. Better than
the 18 inches of snow I have outside my house!

Andy K3UK

 

[digitalradio] Re: Happy Australia Day

[Brad]

--- In digitalradio@yahoogroups.com, "Andrew O'Brien"
<[EMAIL PROTECTED]> wrote:
>
> Happy Australia Day to all our VK members.  Hope the weekend is not too 
> hot for you, Melbourne looked nice and warm on TV today.  Better than 
> the  18 inches of snow I have outside my house!
> 
> Andy K3UK
>

Thanks Andy. Wonderul day here in Sydney too. Kids in the pool, steaks
on the barbie, plenty of cold drinks, and I am waiting for someone in
the USA on 30m SSTV to make it to my webcam!

Cheers

Brad AX2QQ
vk2qq.com

[digitalradio] Happy Australia Day

[Andrew O'Brien]

Happy Australia Day to all our VK members.  Hope the weekend is not too 
hot for you, Melbourne looked nice and warm on TV today.  Better than 
the  18 inches of snow I have outside my house!

Andy K3UK

[digitalradio] NBEMS Surprise

[Andrew O'Brien]

--- In digitalradio@yahoogroups.com, "kh6ty" <[EMAIL PROTECTED]> wrote:
>
> Need a PSK31 channel in addition to the picture channel, both at the 
same 
> time. That way one could communicate while the picture was being 
sent, and 
> would be more like a QSO conversation IMHO. The next release of NBEMS 
will 
> contain a surprise! :-)
> 
> Skip
>

That would be agreat idea Skip!

Re: [digitalradio] QRV 40m Narrow-Band SSTV

[kh6ty]

Need a PSK31 channel in addition to the picture channel, both at the same 
time. That way one could communicate while the picture was being sent, and 
would be more like a QSO conversation IMHO. The next release of NBEMS will 
contain a surprise! :-)

Skip


- Original Message - 
From: "Andrew O'Brien" <[EMAIL PROTECTED]>
To: 
Sent: Friday, January 25, 2008 8:05 PM
Subject: Re: [digitalradio] QRV 40m Narrow-Band SSTV


> Correct Skip, except one can use templates to communicate within the
> picture.  The picture with some text added.  It is slow, 73 seconds
> for each picture but probably about the same time for the average
> PSK31 exchange of text.
>
> Andy
>
>
> On Jan 25, 2008 8:02 PM, kh6ty <[EMAIL PROTECTED]> wrote:
>>
>>
>>
>>
>>
>>
>> Thanks for the narrowbnad SSTV QSO, Tony. Sorry I was so slow - my first
>>  time and I did not read Andy's bozo guide! ;-(
>>
>>  I can understand why regular SSTV goes along with SSB phone. It is very
>> slow
>>  communicating without any other means to do so except by pictures, so it
>>  amounts to just swapping pictures, like regular SSTV, but without any 
>> way
>>  to communicate during the picture reception, or am I missing something?
>>
>>  73, Skip KH6TY
>>
>>
>>  - Original Message -
>>  From: "Tony" <[EMAIL PROTECTED]>
>>  To: 
>>  Sent: Friday, January 25, 2008 7:26 PM
>>  Subject: [digitalradio] QRV 40m Narrow-Band SSTV
>>
>>  > All,
>>  >
>>  > QRV on 7076.0 USB - MP73-N narrow band SSTV.
>>  >
>>  > 00:30z
>>  >
>>  > Tony -K2MO
>>  >
>>
>>  --
>>
>>  No virus found in this incoming message.
>>  Checked by AVG Free Edition.
>>  Version: 7.5.516 / Virus Database: 269.19.11/1243 - Release Date: 
>> 1/25/2008
>>  11:24 AM
>>
>>
>
>
>
> -- 
> Andy K3UK
> www.obriensweb.com
> (QSL via N2RJ)
>





No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.516 / Virus Database: 269.19.11/1243 - Release Date: 1/25/2008 
11:24 AM

Re: [digitalradio] QRV 40m Narrow-Band SSTV

[kh6ty]

Tony , sorry to disappoint, but I am in South Carolina now. STill, you had a 
good signal down here.

Skip


- Original Message - 
From: "Tony" <[EMAIL PROTECTED]>
To: 
Sent: Friday, January 25, 2008 8:17 PM
Subject: Re: [digitalradio] QRV 40m Narrow-Band SSTV


> Skip,
>
>> Thanks for the narrowbnad  SSTV QSO
>
> My pleasure and thank you. Nice signal from KH6 -- punched through the
> QRM.
>
> Tony  -K2MO
>
>
> - Original Message - 
> From: "kh6ty" <[EMAIL PROTECTED]>
> To: 
> Sent: Friday, January 25, 2008 8:02 PM
> Subject: Re: [digitalradio] QRV 40m Narrow-Band SSTV
>
>
>> Thanks for the narrowbnad  SSTV QSO, Tony. Sorry I was so slow - my
>> first
>> time and I did not read Andy's bozo guide! ;-(
>>
>> I can understand why regular SSTV goes along with SSB phone. It is
>> very slow
>> communicating without any other means to do so except by pictures, so
>> it
>> amounts to  just swapping pictures, like regular SSTV, but without any
>> way
>> to communicate during the picture reception, or am I missing
>> something?
>>
>>
>> 73, Skip KH6TY
>>
>>
>>
>> - Original Message - 
>> From: "Tony" <[EMAIL PROTECTED]>
>> To: 
>> Sent: Friday, January 25, 2008 7:26 PM
>> Subject: [digitalradio] QRV 40m Narrow-Band SSTV
>>
>>
>>> All,
>>>
>>> QRV on 7076.0 USB - MP73-N narrow band SSTV.
>>>
>>> 00:30z
>>>
>>> Tony -K2MO
>>>
>>
>>
>> 
>>
>>
>> No virus found in this incoming message.
>> Checked by AVG Free Edition.
>> Version: 7.5.516 / Virus Database: 269.19.11/1243 - Release Date:
>> 1/25/2008
>> 11:24 AM
>>
>>
>
>





No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.516 / Virus Database: 269.19.11/1243 - Release Date: 1/25/2008 
11:24 AM

Re: [digitalradio] QRV 40m Narrow-Band SSTV

[Leigh L Klotz, Jr.]

That's why the MFSK kbd stuff is useful.
More generally, you ought to be able to switch from any kbd data mode to 
any width-compatible image mode and use RSID if the digimode itself 
doesn't already do both.
Leigh/WA5ZNU
Skip KH6TY wrote
>>  I can understand why regular SSTV goes along with SSB phone. It is 
>> very slow
>>  communicating without any other means to do so except by pictures, so
>>  it amounts to  just swapping pictures, like regular SSTV, but without 
>> any
>>  way to communicate during the picture reception, or am I missing
>>  something?

Re: [digitalradio] QRV 40m Narrow-Band SSTV

[Tony]

Skip,

> Thanks for the narrowbnad  SSTV QSO

My pleasure and thank you. Nice signal from KH6 -- punched through the 
QRM.

Tony  -K2MO


- Original Message - 
From: "kh6ty" <[EMAIL PROTECTED]>
To: 
Sent: Friday, January 25, 2008 8:02 PM
Subject: Re: [digitalradio] QRV 40m Narrow-Band SSTV


> Thanks for the narrowbnad  SSTV QSO, Tony. Sorry I was so slow - my 
> first
> time and I did not read Andy's bozo guide! ;-(
>
> I can understand why regular SSTV goes along with SSB phone. It is 
> very slow
> communicating without any other means to do so except by pictures, so 
> it
> amounts to  just swapping pictures, like regular SSTV, but without any 
> way
> to communicate during the picture reception, or am I missing 
> something?
>
>
> 73, Skip KH6TY
>
>
>
> - Original Message - 
> From: "Tony" <[EMAIL PROTECTED]>
> To: 
> Sent: Friday, January 25, 2008 7:26 PM
> Subject: [digitalradio] QRV 40m Narrow-Band SSTV
>
>
>> All,
>>
>> QRV on 7076.0 USB - MP73-N narrow band SSTV.
>>
>> 00:30z
>>
>> Tony -K2MO
>>
>
>
> 
>
>
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.516 / Virus Database: 269.19.11/1243 - Release Date: 
> 1/25/2008
> 11:24 AM
>
> 

Re: [digitalradio] QRV 40m Narrow-Band SSTV

[Tony]

Ron,

Thanks report -- moved to 7077.0 USB to avoid QRM. Look for you there...

Tony -K2MO


- Original Message - 
From: "W4LDE-Ron" <[EMAIL PROTECTED]>
To: 
Sent: Friday, January 25, 2008 7:41 PM
Subject: Re: [digitalradio] QRV 40m Narrow-Band SSTV


> caught a few seconds, you were to quick for me hi, sig 599 plus in 
> Florida
>
> 73-Ron
>
>
> Tony wrote:
>> All,
>>
>> QRV on 7076.0 USB - MP73-N narrow band SSTV.
>>
>> 00:30z
>>
>> Tony -K2MO
>>
>>
>> Announce your digital presence via our Interactive Sked Page at
>> http://www.obriensweb.com/sked
>>
>>
>> DRCC contest info : http://www.obriensweb.com/drcc.htm
>>
>> Yahoo! Groups Links
>>
>>
>>
>>
>>
> 

Re: [digitalradio] QRV 40m Narrow-Band SSTV

[Andrew O'Brien]

Correct Skip, except one can use templates to communicate within the
picture.  The picture with some text added.  It is slow, 73 seconds
for each picture but probably about the same time for the average
PSK31 exchange of text.

Andy


On Jan 25, 2008 8:02 PM, kh6ty <[EMAIL PROTECTED]> wrote:
>
>
>
>
>
>
> Thanks for the narrowbnad SSTV QSO, Tony. Sorry I was so slow - my first
>  time and I did not read Andy's bozo guide! ;-(
>
>  I can understand why regular SSTV goes along with SSB phone. It is very
> slow
>  communicating without any other means to do so except by pictures, so it
>  amounts to just swapping pictures, like regular SSTV, but without any way
>  to communicate during the picture reception, or am I missing something?
>
>  73, Skip KH6TY
>
>
>  - Original Message -
>  From: "Tony" <[EMAIL PROTECTED]>
>  To: 
>  Sent: Friday, January 25, 2008 7:26 PM
>  Subject: [digitalradio] QRV 40m Narrow-Band SSTV
>
>  > All,
>  >
>  > QRV on 7076.0 USB - MP73-N narrow band SSTV.
>  >
>  > 00:30z
>  >
>  > Tony -K2MO
>  >
>
>  --
>
>  No virus found in this incoming message.
>  Checked by AVG Free Edition.
>  Version: 7.5.516 / Virus Database: 269.19.11/1243 - Release Date: 1/25/2008
>  11:24 AM
>
>  



-- 
Andy K3UK
www.obriensweb.com
(QSL via N2RJ)

Re: [digitalradio] QRV 40m Narrow-Band SSTV

[kh6ty]

Thanks for the narrowbnad  SSTV QSO, Tony. Sorry I was so slow - my first 
time and I did not read Andy's bozo guide! ;-(

I can understand why regular SSTV goes along with SSB phone. It is very slow 
communicating without any other means to do so except by pictures, so it 
amounts to  just swapping pictures, like regular SSTV, but without any way 
to communicate during the picture reception, or am I missing something?


73, Skip KH6TY



- Original Message - 
From: "Tony" <[EMAIL PROTECTED]>
To: 
Sent: Friday, January 25, 2008 7:26 PM
Subject: [digitalradio] QRV 40m Narrow-Band SSTV


> All,
>
> QRV on 7076.0 USB - MP73-N narrow band SSTV.
>
> 00:30z
>
> Tony -K2MO
>





No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.516 / Virus Database: 269.19.11/1243 - Release Date: 1/25/2008 
11:24 AM

Re: [digitalradio] QRV 40m Narrow-Band SSTV

[W4LDE-Ron]

caught a few seconds, you were to quick for me hi, sig 599 plus in Florida

73-Ron


Tony wrote:
> All,
>
> QRV on 7076.0 USB - MP73-N narrow band SSTV. 
>
> 00:30z 
>
> Tony -K2MO 
>
>
> Announce your digital presence via our Interactive Sked Page at
> http://www.obriensweb.com/sked
>
>
> DRCC contest info : http://www.obriensweb.com/drcc.htm
>  
> Yahoo! Groups Links
>
>
>
>
>   

[digitalradio] QRV 40m Narrow-Band SSTV

[Tony]

All,

QRV on 7076.0 USB - MP73-N narrow band SSTV. 

00:30z 

Tony -K2MO 

[digitalradio] Re: Anyone want to test high speed modes?

[Andrew O'Brien]

-I would be happy to receive, I have the software.

Andy.


K3UK

-- In digitalradio@yahoogroups.com, Rick <[EMAIL PROTECTED]> wrote:
>
> I am looking for any stations that can test high speed digital modes 
> today. I should be able to properly key up both the RFSM2400 single
tone 
> modem, and either EasyPal or WinDRM OFDM multitone modems. It appears 
> that EasyPal has more built-in features to automate sending images.
> 
> Since I have not received word back from the FCC as to what constitutes 
> "image or FAX" transmissions, the best way would be to take a small (10 
> to 20 Kbyte) picture and measure the time sent and vary power levels to 
> compare the ability to handle weak signals.
> 
> If RFSM2400 is full ARQ, then it would be a clear winner if it can work 
> a little bit below the noise, but scale up for better conditions.
> 
> Also, the multitione OFDM modems (EasyPal and WinDRM) could be used to 
> send large amounts of text if operated in the text portions of the
bands.
> 
> 73,
> 
> Rick, KV9U
>

[digitalradio] New web home for Ham Radio Deluxe

[Andrew O'Brien]

FYI, Ham Radio Deluxe has a new URL


http://www.ham-radio-deluxe.com/

-- 
Andy K3UK
www.obriensweb.com
(QSL via N2RJ)

[digitalradio] Answering that age old question.... "am I getting out ? "

[Andrew O'Brien]

Thanks to some creativity from hams in the digital mode world, it is
easier these days to determine what regions of the world might be
hearing your signal.  You do not need to rely on JAVA radio receivers.
   Here are the one's I recommend..

---
Mode= JT65A.  An world-wide network of stations that reflect any
received information from you back to the web site at
http://jt65.w6cqz.org/index.html
80,40,30,and 20M are common bands.  If any of the stations hear you,
the results are automatically displayed within a minute.
You are not dependent on others to manually enter in your details,
like a cluster, it is all automatic.  Your signal strength is also
displayed. Example :

VE3CDX/W7/RB [DM26ic] Heard PY4EM(GG88) on 14075.99 KHz -16dB at
23:11Z using JT65A
BX1AD/RB [PL04vq] Heard JE5FLM(PM74) on 14075.98 KHz -3dB at 23:10Z using JT65A

---



ALE (standard ALE).  An world-wide network of stations that relay
received information from you back to the web site at
http://hflink.net/qso/
40 and  20M are common bands. If any of the stations hear you, the
results are displayed within a minute.  Your signal strength is also
displayed.  Example :

VK4TGV:  [23:02:25][ 14 MHz] communication De [ZL1BAD]  BER 30 SN 07
NJ7C:   [23:01:41][ 10 MHz] communication De [W6MSU]BER 30 SN 09
VK4TGV: [23:02:26][ 14 MHz] communication De [ZL1BAD]   BER 26 SN 07
NJ7C:   [23:01:54][ 10 MHz] communication De [KM4BA]BER 20 SN 04

This is also automatic, very fast.  If they hear you, you will find out quickly.



PSK31:  A web page dedicated to several bands with some strategically
placed stations relaying back who they heard automatically to the web
page at http://www.projectsandparts.com/30m/
30M is especially well covered but other WARC bands are featured.  Example :

01-25 23:22 N9PUZ   AutoEM59ft  WA9AQQ  10.140  1192PSK31   
Working KI4KGL
01-25 23:21 N9PUZ   AutoEM59ft  KP4K10.140  1490PSK31   


--


PSK31:  Propnet:  Check
http://propnet.org/catch.php?band=HG&last=1¢er=WW  for latest
world-wide stations heard.  You need special software that produces a
script that beacons your stations info and location.  If your station
is heard it appears in the list.  Most WARC bands but especially 30M.
---

SSTV :  N8FQ's new page monitoring 10132 kHz.
http://71.90.101.47:8090/radio/30m_history.html   Displays up to the
30 latest narrow band SSTV pictures heard at his central USA location.
 Judge your signal strength via the quality of the picture displayed .

-


SSTV:  Pretty much the same as N8FQ's page but for wider modes of SSTV
and on 20M, 14230.  Check http://96.228.144.221:81/sstv.html

--


CW:Check http://www.obriensweb.com/sked   then choose the SKCC
option.  You then get a network of hams that you can ask to sked with
and see if you are getting out.  Often 30-40 hams there at once,
during peak evening hours.

Users seen in last 10 minutes:
AA4GT - AJ1M - K0LUW - K2A/4 - K3UK - K8AQM - K8BBM - KA8HFN - KC0RSX
- KC2MHU - KE0N - KE0QM - KM4VX - LW3EX - N1AFV - N5PU - W6UT - W9DLN
- WB1EDI - WU7R

MM/DD  UTC
01/25 23:15  Tnx Barry nada hr too rxng some stn fm west coast nw TU 73
01/25 23:12  ok no luck now to 10118 de K2A/1
01/25 23:06  k2a/1 14048
01/25 23:04  Barry any chance to try on 20m?
01/25 23:00  k2a/1 7048 wb1edi
01/25 22:51  K2A/0, 10121.0

--


Any more ?

Abdy K3UK

-- 
Andy K3UK
www.obriensweb.com
(QSL via N2RJ)

[digitalradio] Some MP73-N pictures for you to view

[Andrew O'Brien]

Check http://71.90.101.47:8090/radio/30m_history.html  The pictures
there today show that this narrow mode can achieve good quality
pictures in a narrow bandwidth.

I have NO idea how robust this mode is.  Despite my guide, I have YET
to have a QSO or even receive a picture.  Hopefully this weekend.

Andy K3UK

[digitalradio] Redefining SSTV operations: SSTV_IN_MFSK16_EASY_WITH_MULTIPSK

[Patrick Lindecker]

For information, here is the good address (the first had an extra-space)...

73
Patrick

- Original Message - 
From: David Carter 
To: [EMAIL PROTECTED] 
Sent: Thursday, January 24, 2008 11:58 PM
Subject: Re: [multipsk] Redefining SSTV operations: 
SSTV_IN_MFSK16_EASY_WITH_MULTIPSK


Try 
http://f6cte.free.fr/SSTV_IN_MFSK16_EASY_WITH_MULTIPSK.doc
There were some extra spaces in the original.
73
Dave Carter
KA1HDG 






From: Gary Kohtala <[EMAIL PROTECTED]>
Reply-To: <[EMAIL PROTECTED]>
Date: Thu, 24 Jan 2008 14:31:46 -0800 (PST)
To: <[EMAIL PROTECTED]>
Subject: Re: [multipsk] Redefining SSTV operations: 
SSTV_IN_MFSK16_EASY_WITH_MULTIPSK

 
 
 

Patrick,

That link does not work. 

Best regards,

Gary, K7EK


- Original Message 
From: Patrick Lindecker <[EMAIL PROTECTED]>
To: digitalradio@yahoogroups.com
Cc: [EMAIL PROTECTED]
Sent: Thursday, January 24, 2008 10:19:03 AM
Subject: [multipsk] Redefining SSTV operations: 
SSTV_IN_MFSK16_EASY_WITH_MULTIPSK

 
 

Hello Leigh and all,

For the ones interested, I've done a Word document which goal is to show from 
two Multipsk snapshots how to do the basic operations in SSTV in MFSK16. This 
document (0.5 Mo) is available from my site site "http://f6cte. free.fr/SSTV_ 
  IN_MFSK16_ EASY_WITH_ MULTIPSK. doc" (copy and paste 
this adress in Internet Explorer (or equivalent) Net adress field).
It is based on the 4.7 version not yet released, but it changes almost nothing.

73
Patrick


  - Original Message - 
   
  From:  Leigh L Klotz,  Jr.   
   
  To: digitalradio@ yahoogroups. com    
   
  Sent: Thursday, January 24, 2008 1:38  AM
   
  Subject: Re: [digitalradio] Re:  Redefining SSTV operations
   

   
   

  Yes. I still think a menu item or a button for "send picture" would be  
  inviting to users. QRG I will leave it to Andy as he brought up the  
  topic of center of activity.

  Leigh/WA5ZNU
  On Wed, 23 Jan 2008  1:07 pm, Patrick Lindecker wrote:
  > Hello Leigh,
  >
  >> So,  I propose simply making it more easily accessible, for example,  by
  >
  >> making it available on a main menu, or even as its own  mode. In
  >
  > I understand. In fact the solution would be to do a  three pages 
  > document "MFSK-SSTV easy with Multipsk" in the same way  as I do with 
  > ALE.
  >
  >> dialog box for image types, and  in the case of MultiPSK and PocketDigi,
  >
  >> it would send the  RSID for MFSK.
  >
  > It is sure very comfortable to receive a RS ID  as the tuning is 
  > immediatly perfect.
  >
  > But you would  need a specific QRG for these pictures...
  >
  > 73
  >
  >  Patrick
  >
  >> - Original Message  -
  >>
  >> From: Leigh L Klotz, Jr.
  >>
  >>  To: digitalradio@ yahoogroups. com 
 
  >>
  >>  Sent: Wednesday, January 23, 2008 8:17 PM
  >>
  >> Subject: Re:  [digitalradio] Re: Redefining SSTV operations
  >>
  >>  Patrick,
  >>
  >> Yes, but MultiPSK and DRM780 and fldigi and  other programs already
  >> support MFSK and other  modes.
  >>
  >> My point is that few know about MFSK picture  mode, even though it is
  >> implemented in many programs, because it  is accessible only when in 
  >> MFSK
  >> mode and is hard to  find.
  >> So, I propose simply making it more easily accessible, for  example, by
  >> making it available on a main menu, or even as its own  mode. In
  >> reality, it would simply be MFSK and would start with the  Open File
  >> dialog box for image types, and in the case of MultiPSK  and PocketDigi,
  >> it would send the RSID for MFSK.
  >>  Leigh/WA5ZNU
  >> On Tue, 22 Jan 2008 12:48 pm, Patrick Lindecker  wrote:
  >>> Hello Leigh,
  >>>
  >>> RR for  all.
  >>>
   is mostly a UI thing, allowing people  in Olivia or some other mode of
  >>>
   about the  same bandwidth to initiate an MFSK picture  transmission
  >>>
  >>> Yes but it would need a MFSK  decoder (to decode the SSTV prefix) plus
  >>> the Olivia  decoder.
  >>>
  >>> It would be better to do MFSK16  (+MFSK SSTV) only.
  >>>
  >>>  73
  >>>
  >>> Patrick
  >>>
    - Original Message -
  
   From:  Leigh L Klotz, Jr.
  
   To: digitalradio@ yahoogroups. com 
 
  
    Sent: Monday, January 21, 2008 10:16  PM
  
   Subject: Re: [digitalradio] Re:  Redefining SSTV operations
  
   Right, ypu  need the size, not just the fact that it is the  mode.
  
   However, if you just use the  MFSK code and then send the size info in
   MFSK, it would be  100% compatible with existing implementations. 
   So,  it
   is mostly a UI thing, allowing people in Olivia or some  other mode of
   about the same bandwidth to initiate an MFSK  picture transmission
   without the cognitive overhead of  switching to MFSK. PSK 

Re: [digitalradio] MP73-N in Europe ?

[Jens Petersen]

On Fri, 25 Jan 2008 17:50:00 -, you wrote:

>
>Hello  Europeans, are there any activities in MP73-N mode in our part of
>the world ??

I have called on 30m, but no answer so far.
Maybe we could arrange a sked?
-- 
OV1A Jens

Solar Cycle 24 has arrived!

[digitalradio] Understanding image transmission

[Patrick Lindecker]

Sholto,

It is an interesting mail. 

Can I QSP it to digitalradio?

73
Patrick


- Original Message - 
From: Sholto Fisher 
To: [EMAIL PROTECTED] 
Sent: Friday, January 25, 2008 5:05 PM
Subject: Re: [multipsk] Understanding image transmission


I think there is a little confusion creeping in here:

"MFSK SSTV" is really a misnomer. It refers to an analog SSTV picture which
can be initiated in MFSK16 only. The picture is not sent using MFSK16
modulation in any way, it is just a narrow-band SSTV transmission. Just
before transmission, your program sends a "Pic:" command and this switches
the remote program into SSTV receive mode.

The idea being, you have a nice chat in MFSK16 and when you want to send a
picture, you press a button and this starts the analog SSTV picture
transmission. After that you can carry on in MFSK16

The "Digisstv" option in MultiPSK is really a digital picture transmission.
It is the encoding of an image in the current mode you are using. So in
Packet, the image is broken down into standard AX25 packets and sent that
way. In PSK220F it is coded and sent as binary characters (which you don't
see). It's a good idea but is limited by the size of the picture and the
speed of transmission.

The EasyPal & WinDRM SSTV programs are completely digital too. They are
based on the DRM OFDM modulation.

The MMSSTV modes MP73-N etc are narrow-band analog SSTV modes (similar to
the MFSK16 SSTV above). The bandwidth of these is 400Hz if you include the
sync pulse. These, Digisstv and the MFSK SSTV mode can be legally used in
the data/text areas of the bands now in FCC controlled region 2. The DRM
modes cannot and need to be used in the voice area.

73, Sholto KE7HPV.



 

[digitalradio] SSTV on 30M ?

[Russell Blair]

Its my understatding that we should be using MP73-N
for SSTV on 30m (10.132), that keeps it at or under
500hz wide.

Russell NC5O

= 
IN GOD WE TRUST ! 
= 
Russell Blair NC5O
  Skype-Russell Blair 
Hell Field #300
  DRCC #55



  

Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile.  Try it now.  
http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ 

[digitalradio] MP73-N in Europe ?

[ha3dmf]

Hello  Europeans, are there any activities in MP73-N mode in our part of
the world ??

73 de Guenter, HA3DMF

Re: [digitalradio] General questions about SSTV

[Rick]

Hi Bob,

The digital modes are not often mixed with analog and since the analog 
were there first, they tend to use the lower frequency, particularly on 
20 meters.

Since you are quite close to me, you may find that best signals on 40 
meters as a good choice. The most active operator is Dave Jones, KB4YZ, 
located in Indiana.

Most of operation on 40 meters is digital SSTV but some hams may still 
be operating analog on 20 or other frequencies. There may be 
Yahoogroups, but one thing about SSTV is that all the coordination is 
done with voice and that probably means SSB voice most of the time, so 
you can ask questions. Dave is very helpful and pleasant although I have 
found some of the older hams to be a bit unpleasant with newcomers who 
ask questions.

The most popular software at the moment seems to be EasyPal and seems to 
have eclipsed WinDRM for digital SSTV.

I recommend Dave's site for SSTV information:

http://www.kiva.net/~djones/

Scroll down to the EasyPal (New Version) section for information and 
downloads.

73,

Rick, KV9U




Bob Christenson wrote:
> Hi guys, I'm looking into SSTV. I see that popular frequencies to
> operate it are 7171, 7173, 14230 and 14233. Are these pictures sent
> using an analog or digital method? What popular software is being
> used? Is there another Yahoo group for this? Thanks for the help. Bob
> C (WU9Q)
>
>   

Re: [digitalradio] General questions about SSTV

[Ralph Mowery]

--- Bob Christenson <[EMAIL PROTECTED]> wrote:

> Hi guys, I'm looking into SSTV. I see that popular
> frequencies to
> operate it are 7171, 7173, 14230 and 14233. Are
> these pictures sent
> using an analog or digital method? What popular
> software is being
> used? Is there another Yahoo group for this? Thanks
> for the help. Bob
> C (WU9Q)
> 
> 
>
SSTV is usually an analog mode.  YOu can use the sound
card on your computer to work it.  

Look here for some free programs.

http://www.muenster.de/~welp/sb.htm

MMSSTV is a popular free program.  

Set your rig for USB and tune in the hams talking
about the sstv.  This should put you on frequency. 
There are many differant modes so you will have to see
which one they are sending at the time.  YOu may hear
them  say something like Scotty 1 or such.  

As with most sound card modes, for receiving you may
be able to decode it just by holding the mic from the
computer next to the receiver speaker if you are in a
quiet location.



  

Looking for last minute shopping deals?  
Find them fast with Yahoo! Search.  
http://tools.search.yahoo.com/newsearch/category.php?category=shopping

[digitalradio] General questions about SSTV

[Bob Christenson]

Hi guys, I'm looking into SSTV. I see that popular frequencies to
operate it are 7171, 7173, 14230 and 14233. Are these pictures sent
using an analog or digital method? What popular software is being
used? Is there another Yahoo group for this? Thanks for the help. Bob
C (WU9Q)

[digitalradio] Re: Opinions please...What is the best interface for PSK31?

[Harry Wiliford]

  Jeff 
   Its Like you get what you pay for. I use Ham Radio Deluxe /DM780  with a 
RigBlaster Pro.
   
  If you watch the swap boards at QRZ or QTH you can find a 
  RigBlaster in the 50 to 75 dollar range.A rig control cable can be found 
there also prices range around 25 dollars 
   
  Take a look here  http://forums.ham-radio.ch/  if your inclined to see the 
good stuff .
  Good luck and Happy shopping .
   
   73 de wb9iiv - Harry

   
-
Looking for last minute shopping deals?  Find them fast with Yahoo! Search.

[digitalradio] Re: Opinions please...What is the best interface for PSK31?

[adastra_2001]

try this. http://www.amqrp.org/kits/nue-psk31/
73's N2FVS 

Re: [digitalradio] Opinions please...What is the best interface for PSK31?

[Russell Hltn]

On Jan 24, 2008 4:42 PM, tailfeathers <[EMAIL PROTECTED]> wrote:
> I have a signalink SL-1...It is vox activated so your port can be used
> with other things...Works good...They have a couple models now...
> http://www.tigertronics.com/sl+main.htm
> Gary
>

I'd think the SignaLink USB would be worth the extra money.  It makes
for a very simple interface:  One USB cable to the computer and one
cable to the radio.

Remember folks, he asked for the best, not the cheapest.

Perhaps the best is the Ten-Tec OMNI-VII 

[digitalradio] Re: Opinions please...What is the best interface for PSK31?

[cesco12342000]

> If you spend a lot of money on an interface, 
> it's because you wanted to, not because you need to. 

Right !

The main points of such an interface are to provide isolation between PC 
and Rig. This is normally done by audio-transformers for the mic and 
speaker lines, optoisolators for ptt line.

The main problem i have seen in commercial interfaces is a bad frequency 
response for the audio. 50hz to 3khz should be flat. With some interfaces, 
it's not.

The other problem are the cat-ptt devices. There is no point in having the 
audio isolated but running a ground-loop trough the cat-interface. I think 
the simple optoisolated "single rts ptt" devices are superior. If you have 
to use CAT for PTT you need a fully isolated CAT port !

The "ideal" solution would be to run the whole audio and ptt trough 
optical cables. Most soundcards do support optical, but i have never seen 
the Rig-counterpart for this.





If you are a builder, it's a hand full of parts. If you 
> have any old PC modem cards, you can steal the audio isolation 
transformers 
> off of them and get past two important parts for free.
> 
> Or buy something like the Rascal kit and build it. Comes with interface 
cables 
> and everything shipped for under $50.
> 
> It's not like it's some complicated piece of equipment.
>