Date   

Re: New release of MULTIPSK (4.45) - PSKR modes #Multipsk

Andrew OBrien
 

Very useful additions 
Thanks

Andy K3UK


New release of MULTIPSK (4.45) - PSKR modes #Multipsk

Patrick Lindecker
 

New release of MULTIPSK (4.45)

 

Pour les francophones: la version en français de ce message se trouve sur mon site (http://f6cte.free.fr). Il suffit de cliquer sur le lien "Principales modifications (courriel avertissant de la sortie de la nouvelle version)".


Hello to all Ham and SWL,

 

The new releases of MultiPSK (4.45) and Clock (1.11.10) are on my Web site (http://f6cte.free.fr/index_anglais.htm).
The mirror site is Earl's, W8BR: https://www.paazig.net/f6cte/MULTIPSK_setup.exe

The MD5 signature of the downloaded MULTIPSK_setup.exe file to, possibly, check (with WinMD5 for example), that the downloading works without error, is equal to:

292ca0bcf35e9ac1bcafdfa05d723666

Multipsk associated to Clock are freeware programs but with functions submitted to a licence (by user key).

 

Clock 1.11.10  fixes a bug about the BBC week number decoding.

 

The main improvement of MULTIPSK 4.45 is the following:

 

PSK125R/250R/500R modes coding/decoding

 

The "R" means "Robust", this because the modulation is the PSKxyzF one, at which it is added an interleaving.
The PSKR modes (initially created on the Fldigi program) are fast, robust and sensitive.

The advised frequencies are 1838, 3570, 7070, 14070, 18101, 21070 and 28120 kHz.

 

These modes are in freeware, so without time limitation.

See general specifications below.

 

Other improvements:

·                     new POCSAG.TXT file for correspondences "Address - Name" managed by the user.

Note that, for the ones who want to connect the SDRUno program to Multipsk (in SdR demodulation) through I/Q signals , Fred wrote this guide:

http://f6cte.free.fr/Using_I-Q_signals_between_SDRUno_and_MultiPSK.pdf

 

Note about translation of Multipsk.exe and Clock .exe:  the 4.44.1 version of Multipsk has been translated to Spanish by Joachin (EB4Z), from French.

See: http://f6cte.free.fr/Translation_files.htm.

 

PSK125R/250R/500R modes description

Created by: John Phelps (KL4YFD) in 2013 on Fldigi

 

Baud rate : 125 for PSK125R, 250 for PSK250R, 500 for PSK500R

Speed : 84 wpm (average) for PSK125R, 168 wpm for PSK250R, 336 wpm for PSK500R

Modulation : DBPSK

Reception mode: indifferent (LSB or USB)

Character set : ASCII characters + almost all ANSI extended characters + a backspace character ("Varicode" characters)

Shape of pulse : raised cosine 

Bandwidth : about 260 Hz for PSK125R, 500 Hz for PSK250R, 1000 Hz for PSK500R

Synchronization: automatic using the signal

Correction code: no

Convolution code: R(Rate)=1/2, K (Constraint length)=7 with Viterbi type decoder, both coder outputs being sent successively,

Interleaving : on 82 bits with 40 diagonal interleavers in series, on a square elementary matrix 2x2 for PSK125R, on 162 bits with 80 interleavers for PSK125R,on 322 bits with 160 interleavers for PSK500R

Drift tolerance : 2 Hz/sec (depending on signal-to-noise ratio) for PSK125R, 4 Hz/s Hz for PSK250R, 8 Hz/s for PSK500R

Pmean/Ppeak: 0.79

Lowest S/N: - 9 dB for PSK125R, - 6 dB for PSK250R, - 3 dB for PSK500R

 

73

Patrick

 

 

 


Re: VARA HF Modem Speeds

Rick Muething
 

Graham,

During the development of the Simulator there were many mods to the code doing the audio processing.  Specifically my initial code (and some of the initial tests) did not correctly model the multipath (created by the delay and modulation (with a randomized Real + Imaginary veector) of the audio. This was found to be due in part to problems with the C++ implementation of the narrow band (~3 Hz) multipath filters which were implemented using IIR filters.   It took a couple of months to get the implementation to match/track other simulators (hardware and software).  Also the latest simulator firmware versions (2.03)  gave users the option of using 1 path (WGN), 2 path multipath or a 4 path multipath. The results published in Tom W's testing writeup:

https://winlink.org/sites/default/files/downloads/a_winlink_digital_mode_performance_comparison_based_on_the_ionis_sim_hf_vhf_channel_simulator_-_november_2_2020_0.pdf

use only 2 path multipath (two I + Q paths) along with the most recent revisions of VARA, Pactor 4 and the Winlink Express client program.  Some mods in the Winlink  Express modem drivers allowed slightly (10-15%) more throughput in both Pactor 4 and VARA.  VARA 2.8 KHz BW was not available for testing.  That should allow slightly faster throughput at High S:N levels (> 25 dB) .  In practice however it is rare (without Linears or high gain antennas) to often see digital connections > 25 dB  S:N.

The simulator of course does not know or care what protocol it is processing it simply takes the audio from the modem/sound card,  checks to make sure it is not overdriving the simulator ,and processes the audio at the requested simulator bandwidth (300-3300 Hz   or 300-6300 Hz)  and then mixes WGN at the requested S:N and the desired level of multipath (using the recommended path delay values by the CCIR/ITU ) .  The extensive testing showed repeatable results [net throughputs for long (5-15 minute) ARQ sessions] for all protocols.

The Ionos Simulator also computes and displays the Crest Factor which can help determine the optimum drive level for the transmitter.  With very low crest factors (< 2:1 or < 3dB) it is quite possible to drive most amateur SSB transmitters  to exceed its thermal limits even if it is not driven to maximum rated PEP.  With high crest factors (>5-6 dB) most amateur transmitters will be PEP limited before thermal limited and this will result in lower net Energy per bit and therefore lower throughput for a given PEP drive level.

The main value of the simulator is that it allows duplicating statistically similar paths (S:N and multipath) that are almost impossible to do using using over the air testing. This is why they have been used extensively in testing and characterizing protocols such as Mil STD 188 and STANAG.

73,

Rick KN6KB


On 1/22/2021 9:17 AM, Graham wrote:

Rick 

I , just noticed the  P4  and V4 speeds , had , in effect  reversed, where as the  other  modes , look to be similar ,

interesting  would be  comparison of  OLIVIA  and  ROS-HF-4  modes 

P4 is  used on HF out side the  part97  regulatory area , various on air comparisons  , have been  made , one  ive posted below 
Test via HB9AVK
   592 km  7.050  , shows a  11:7   compound advantage , test '2' shows  P4  advantage , 10 seconds in  120 
link survival, V4  appears also to offer advantage ?

In the  simulation, the  audio is presented  directly ? ,  Vara has been  developed  using live  links, 
notably , recent versions are  bandwidth  tailored to maximise  use of available bandwidth , peak ratios also have been  
dynamically matched .. all these contribute to  optimisation 


73 -Graham
g0nbd




COMPARE VARA and PACTOR4  upload via Gateway HB9AK

 

Test via HB9AVK   592 km  7,050 MHz DIAL

 

 

Term 1

 

*** Completed send of VARA message JE2O4B0QBRP2

*** Sent 1 message.  Bytes: 20230,  Time: 01:03,  bytes/minute: 19030

 

*** Completed send of Pactor message MATG09PBPW98

*** Sent 1 message.  Bytes: 20218,  Time: 03:11,  bytes/minute: 6332

 

Term 2

 

*** Completed send of VARA message 6Z4SZQFPRIJL

*** Sent 1 message.  Bytes: 20213,  Time: 02:16,  bytes/minute: 8870

 

*** Completed send of Pactor message 2XWY9G2MCS0N

*** Sent 1 message.  Bytes: 20219,  Time: 02:07,  bytes/minute: 9517

 

Term 3

 

*** Completed send of VARA message TC67GB6RLZ1S

*** Sent 1 message.  Bytes: 20213,  Time: 02:46,  bytes/minute: 7301

 

*** Completed send of Pactor message Z6PSHUFB8HZ3

*** Sent 1 message.  Bytes: 20217,  Time: 02:21,  bytes/minute: 8573

 

Term 4

 

*** Completed send of VARA message K9K11XBW9D3F Vara WL2K

*** Sent 1 message.  Bytes: 20215,  Time: 02:37,  bytes/minute: 7692

 

*** Completed send of Pactor message 58KVLSL4OUSX    fast QRM Disconnecting Timeout

*** Sent 1 message.  Bytes: 20219,  Time: 05:24,  bytes/minute: 3740

 

Result:

 

Term

MODE

Total bytes sent

Time

bytes/minute

Message ID

 

1

VARA

20230

01:03

19030

JE2O4B0QBRP2

 

 

P4

20218

03:11

6332

MATG09PBPW98

 

 

 

 

 

 

 

 

2

VARA

20213

02:16

8870

6Z4SZQFPRIJL

 

 

P4

20219

02:07

9517

2XWY9G2MCS0N

 

 

 

 

 

 

 

 

3

VARA

20213

02:46

7301

Z6PSHUFB8HZ3

 

 

P4

20217

02:21

8573

 

 

 

 

 

 

 

 

 

4

VARA

20215

02:37

7692

K9K11XBW9D3F

 

 

P4

20219

05:24

3740

58KVLSL4OUSX

 

 

 

 

 

 

 

 

 

 

 

 

VARA Mean Value:  10723

P4 Mean Value:       7040


New VARA SAT v4.0.2

Graham
 

New VARA SAT v4.0.2

The new  version of V-SAT , regains  full  compatibility  with 'Winlink' whilst providing the enhancements  ,of the  latest  VARA HF 4  release.

BW  2300 Hz 'only', same as  V4  HF   

Dynamic AFC : Provides  track and  drift correction , which negates  high stability hardware requirements , VARA DSP  detects  and  implements corrections. in the  modem  tx/rx spectrum. 

Extended  link  latency: The modem accommodates extended  latency , induced  by  path time  delay , this  facility is  also  enables  the  modem to  be  deployed , with SDR  Tx/RX where  extended  processing  times are encountered .

NON Licenced  , limited to  MFSK  modem 

V SAT  is supported  by  CHAT Module 

 IS0GRB VARA SAT Gateway  24/7 on 10489635.0 USB Dial


Calibration.jpg



VARA SAT v4.0 Speed Levels.jpg

 
 
More info in AMSAT forum:


73-Graham
g0nbd


Re: VARA HF Modem Speeds

Graham
 

Rick 

I , just noticed the  P4  and V4 speeds , had , in effect  reversed, where as the  other  modes , look to be similar ,

interesting  would be  comparison of  OLIVIA  and  ROS-HF-4  modes 

P4 is  used on HF out side the  part97  regulatory area , various on air comparisons  , have been  made , one  ive posted below 
Test via HB9AVK
   592 km  7.050  , shows a  11:7   compound advantage , test '2' shows  P4  advantage , 10 seconds in  120 
link survival, V4  appears also to offer advantage ?

In the  simulation, the  audio is presented  directly ? ,  Vara has been  developed  using live  links, 
notably , recent versions are  bandwidth  tailored to maximise  use of available bandwidth , peak ratios also have been  
dynamically matched .. all these contribute to  optimisation 


73 -Graham
g0nbd




COMPARE VARA and PACTOR4  upload via Gateway HB9AK

 

Test via HB9AVK   592 km  7,050 MHz DIAL

 

 

Term 1

 

*** Completed send of VARA message JE2O4B0QBRP2

*** Sent 1 message.  Bytes: 20230,  Time: 01:03,  bytes/minute: 19030

 

*** Completed send of Pactor message MATG09PBPW98

*** Sent 1 message.  Bytes: 20218,  Time: 03:11,  bytes/minute: 6332

 

Term 2

 

*** Completed send of VARA message 6Z4SZQFPRIJL

*** Sent 1 message.  Bytes: 20213,  Time: 02:16,  bytes/minute: 8870

 

*** Completed send of Pactor message 2XWY9G2MCS0N

*** Sent 1 message.  Bytes: 20219,  Time: 02:07,  bytes/minute: 9517

 

Term 3

 

*** Completed send of VARA message TC67GB6RLZ1S

*** Sent 1 message.  Bytes: 20213,  Time: 02:46,  bytes/minute: 7301

 

*** Completed send of Pactor message Z6PSHUFB8HZ3

*** Sent 1 message.  Bytes: 20217,  Time: 02:21,  bytes/minute: 8573

 

Term 4

 

*** Completed send of VARA message K9K11XBW9D3F Vara WL2K

*** Sent 1 message.  Bytes: 20215,  Time: 02:37,  bytes/minute: 7692

 

*** Completed send of Pactor message 58KVLSL4OUSX    fast QRM Disconnecting Timeout

*** Sent 1 message.  Bytes: 20219,  Time: 05:24,  bytes/minute: 3740

 

Result:

 

Term

MODE

Total bytes sent

Time

bytes/minute

Message ID

 

1

VARA

20230

01:03

19030

JE2O4B0QBRP2

 

 

P4

20218

03:11

6332

MATG09PBPW98

 

 

 

 

 

 

 

 

2

VARA

20213

02:16

8870

6Z4SZQFPRIJL

 

 

P4

20219

02:07

9517

2XWY9G2MCS0N

 

 

 

 

 

 

 

 

3

VARA

20213

02:46

7301

Z6PSHUFB8HZ3

 

 

P4

20217

02:21

8573

 

 

 

 

 

 

 

 

 

4

VARA

20215

02:37

7692

K9K11XBW9D3F

 

 

P4

20219

05:24

3740

58KVLSL4OUSX

 

 

 

 

 

 

 

 

 

 

 

 

VARA Mean Value:  10723

P4 Mean Value:       7040


new SW Radiogram program now available

 

Hello to all the digital folks out there.
 
A new program for the Shortwave Radiogram broadcasts has now been posted on the SW Radiogram website. 
 
If you're new to decoding digital, this is a pretty nice way to get your feet wet. You can use your desktop or laptop, or you can use an Android device such as a smartphone or tablet. You can find links to the SW Radiogram website, software for decoding, and wiki articles with extensive details and help at: http://www.udxf.nl/events.html.  
 
If you'd like to see a list of web receivers (which are often reported as being used), receiver, transceiver and SDR applications and more,  take a look at the SW Radiogram gateway at https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
 
Help is also available on Facebook and Twitter. The SW Radiogram website has the links. 
 
Radio Northern Europe International has announced its new schedule for program 13.  
See https://rnei.org/2021/01/10/radio-northern-europe-international-show-13-announcement/ for more information. You can read about HamDRM (also known
as WinDRM) at https://www.sigidwiki.com/wiki/WinDRM
 
A tip for decoding PSK500 per Roger on the World of Radio reflector...
Sending PSK as AM modulation is less of a problem, but demodulation in AM should be avoided! I recommend separate demodulation in USB and LSB, ideally from an IQ recording. In the case of the AM sum signal (left+right), there is often a destructive phase overlap and decoding problems.
 
Here's hoping for good propagation 


Re: VARA HF Modem Speeds

Rick Muething
 

Graham,

I think I missed the first part of the discussion.  Is this referring to the Winlink/ARSFI  Ionos Simulator project/simulator?

There is a pretty complete write-up of the effort and examples of simulation runs at:

https://winlink.org/content/ionos_simulator

Tom W. N5TW,  Tom Lafleur KA6IQA  and I were working on the effort most of last year during the development and verification of the simulator and testing  common popular protocols.

If interested I can provide more detail.

73,

Rick Muething, KN6KB Winlink Development Team.

On 1/21/2021 10:42 AM, Graham wrote:
Its unclear as to  why the  simulator results where  so  wrong  and now  so  right , applying to  just one mode, where as   other's  remain, apparently,  unaffected  ?

What was identified as  causing the  discrepancy  ?

73 -Graham
g0nbd


Re: VARA HF Modem Speeds

Graham
 

Yes , Quite agree  Andy ,

The  vara  modem  started  years  before it  broke the  surface , in many variations,  the  fully  odfm version was  and remains radical ,  the  mfsk  front end to the  HF version, signalled the  limitations to  psk  modulation .. perhaps echoing the  MT63 , progression to  Olivia in terms of  s/n  

In reality , 'we'  as in data  mode users  are  now  10 years  behind  the  times , Ros HF , introduced , 'efficient   use of  bandwidth'  whilst maintaining QSO integrity and equal channel  access  for  users at  minimal s/n levels . 

To day , as already commented ,  non  coexisting  transmission formats  are  spreading along the  dial  

Only  need  to  observe the  psk-map  11  meter  band , when there  is a  opening ,  to  observe , the  traffic level  
supported in a  single  voice  channel  , by non ham users , demonstrating the  validity of the  designe .. and the far sightedness of the  SS Trial group  , who  also  came under  fire , 

73-Graham
g0nbd


Re: VARA HF Modem Speeds

Andrew OBrien
 

and I will add ...  The pactor modes still hold up as very effective under various conditions but I think it is ironic that after the written and verbal "beating" that Jose received for his ROS mode software ,  Jose deserves huge credit and thanks for his VARA work.  The results mentioned in the article are truly outstanding! Both HF and FM VARA .  Wide VARA and Narrow VARA. The article appropriately references Rick's pioneering work with WINMOR and ARDOP.  I especially enjoyed the early WINMOR experiments on air.

Andy K3UK 


Re: VARA HF Modem Speeds

Andrew O'Brien
 

The article is very interesting
Andy K3UK

On Thu, Jan 21, 2021 at 10:42 AM Graham <g0nbd@...> wrote:
Its unclear as to  why the  simulator results where  so  wrong  and now  so  right , applying to  just one mode, where as   other's  remain, apparently,  unaffected  ?

What was identified as  causing the  discrepancy  ?

73 -Graham
g0nbd



--
Andy


Re: VARA HF Modem Speeds

Graham
 

Its unclear as to  why the  simulator results where  so  wrong  and now  so  right , applying to  just one mode, where as   other's  remain, apparently,  unaffected  ?

What was identified as  causing the  discrepancy  ?

73 -Graham
g0nbd


Re: VARA HF Modem Speeds

Rick Muething
 

Tony/All,

VARA is truly a very capable protocol and throughput on HF can exceed 20 K bytes/minute over some channels.   Tom Whiteside N5TW of the Winlink development team recently completed an extensive comparison of several HF and VHF/UHF ARQ protocols over a wide range of S:N and Multipath propagation using a new low-cost HF/VHF Ionospheric Simulator.  This kind of testing allows accurate testing with repeatable data which is often difficult or impossible to duplicate over the air. Those interested in seeing details on Tom Whiteside's N5TW simulation effort and protocol comparisons  should check out https://winlink.org/content/ionos_simulator

73,

Rick Muething, KN6KB

On 1/17/2021 5:45 PM, Tony wrote:
All:

I observed an unusually fast file transfer while using VARA on 40 meters today (see below). It's not uncommon to see speeds of 15,000 to 20,000 bytes/minute when the band is stable, but today's observation shows that faster speeds are possible under the right conditions.

I should mention that the 30K b/m speed was recorded while receiving a 30K image.

Tony -K2MO



*** Winlink Vara Connection to KC8YJJ @ 2021/01/17 20:09:59  USB Dial: 7101.000
*** Station Bearing: 268,  Range: 393 miles
RMS Trimode 1.3.36.0
K2MO has 120 minutes remaining with KC8YJJ
{SFI = 078 On 2021-01-17 20:00 UTC}
[WL2K-5.0-B2FWIHJM$]
;PQ: 44766187
CMS via KC8YJJ >
   ;FW: K2MO
   [RMS Express-1.5.34.0-B2FHM$]

   ;PR: 17655197
   ; KC8YJJ DE K2MO (FN30JV)
   FF
;PM: K2MO 36Y27O2YLIPH 30887 73guddx@gmail.com ---
FC EM 36Y27O2YLIPH 32990 30887 0
F> C5
   FS Y
*** Receiving 36Y27O2YLIPH
*** 36Y27O2YLIPH - 33005/30899 bytes received
*** Bytes: 31145,  Time: 01:03,  bytes/minute: 29618
   FF
FQ
*** --- End of session at 2021/01/17 20:11:49 ---
*** Messages sent: 0.  Total bytes sent: 0,  Time: 01:49, bytes/minute: 0
*** Messages Received: 1.  Total bytes received: 31145,  Total session time: 01:49,  bytes/minute: 17035
*** Disconnected from Winlink RMS: KC8YJJ @ 2021/01/17 20:11:56
*** Session: 1.9 min;  Avg Throughput: 15552 Bytes/min;   1 Min Peak Throughput: 15552 Bytes/min





Re: VARA HF Modem Speeds

Andrew O'Brien
 

OK , will try again.  I have been using my Winlink address.

Andy 

On Sun, Jan 17, 2021 at 9:22 PM Tony <73GUDDX@...> wrote:
Andy:

Had to edit my whitelist to include gmail addresses. 

Please try again when you get the chance.

Tony -K2MO



On 1/17/2021 6:36 PM, Andrew OBrien wrote:
By the way Tony, I have sent you a few emails via your Winlink  address lately and each time winlink says nop such address.

Andy K3UK 

On Sun, Jan 17, 2021 at 5:45 PM Tony <73GUDDX@...> wrote:
All:

I observed an unusually fast file transfer while using VARA on 40 meters
today (see below). It's not uncommon to see speeds of 15,000 to 20,000
bytes/minute when the band is stable, but today's observation shows that
faster speeds are possible under the right conditions.

I should mention that the 30K b/m speed was recorded while receiving a
30K image.

Tony -K2MO



*** Winlink Vara Connection to KC8YJJ @ 2021/01/17 20:09:59  USB Dial:
7101.000
*** Station Bearing: 268,  Range: 393 miles
RMS Trimode 1.3.36.0
K2MO has 120 minutes remaining with KC8YJJ
{SFI = 078 On 2021-01-17 20:00 UTC}
[WL2K-5.0-B2FWIHJM$]
;PQ: 44766187
CMS via KC8YJJ >
    ;FW: K2MO
    [RMS Express-1.5.34.0-B2FHM$]

    ;PR: 17655197
    ; KC8YJJ DE K2MO (FN30JV)
    FF
;PM: K2MO 36Y27O2YLIPH 30887 73guddx@... ---
FC EM 36Y27O2YLIPH 32990 30887 0
F> C5
    FS Y
*** Receiving 36Y27O2YLIPH
*** 36Y27O2YLIPH - 33005/30899 bytes received
*** Bytes: 31145,  Time: 01:03,  bytes/minute: 29618
    FF
FQ
*** --- End of session at 2021/01/17 20:11:49 ---
*** Messages sent: 0.  Total bytes sent: 0,  Time: 01:49, bytes/minute: 0
*** Messages Received: 1.  Total bytes received: 31145,  Total session
time: 01:49,  bytes/minute: 17035
*** Disconnected from Winlink RMS: KC8YJJ @ 2021/01/17 20:11:56
*** Session: 1.9 min;  Avg Throughput: 15552 Bytes/min;   1 Min Peak
Throughput: 15552 Bytes/min









--
Andy


Re: VARA HF Modem Speeds

Tony
 

Andy:

Had to edit my whitelist to include gmail addresses. 

Please try again when you get the chance.

Tony -K2MO



On 1/17/2021 6:36 PM, Andrew OBrien wrote:
By the way Tony, I have sent you a few emails via your Winlink  address lately and each time winlink says nop such address.

Andy K3UK 

On Sun, Jan 17, 2021 at 5:45 PM Tony <73GUDDX@...> wrote:
All:

I observed an unusually fast file transfer while using VARA on 40 meters
today (see below). It's not uncommon to see speeds of 15,000 to 20,000
bytes/minute when the band is stable, but today's observation shows that
faster speeds are possible under the right conditions.

I should mention that the 30K b/m speed was recorded while receiving a
30K image.

Tony -K2MO



*** Winlink Vara Connection to KC8YJJ @ 2021/01/17 20:09:59  USB Dial:
7101.000
*** Station Bearing: 268,  Range: 393 miles
RMS Trimode 1.3.36.0
K2MO has 120 minutes remaining with KC8YJJ
{SFI = 078 On 2021-01-17 20:00 UTC}
[WL2K-5.0-B2FWIHJM$]
;PQ: 44766187
CMS via KC8YJJ >
    ;FW: K2MO
    [RMS Express-1.5.34.0-B2FHM$]

    ;PR: 17655197
    ; KC8YJJ DE K2MO (FN30JV)
    FF
;PM: K2MO 36Y27O2YLIPH 30887 73guddx@... ---
FC EM 36Y27O2YLIPH 32990 30887 0
F> C5
    FS Y
*** Receiving 36Y27O2YLIPH
*** 36Y27O2YLIPH - 33005/30899 bytes received
*** Bytes: 31145,  Time: 01:03,  bytes/minute: 29618
    FF
FQ
*** --- End of session at 2021/01/17 20:11:49 ---
*** Messages sent: 0.  Total bytes sent: 0,  Time: 01:49, bytes/minute: 0
*** Messages Received: 1.  Total bytes received: 31145,  Total session
time: 01:49,  bytes/minute: 17035
*** Disconnected from Winlink RMS: KC8YJJ @ 2021/01/17 20:11:56
*** Session: 1.9 min;  Avg Throughput: 15552 Bytes/min;   1 Min Peak
Throughput: 15552 Bytes/min








Re: VARA HF Modem Speeds

Andrew OBrien
 

By the way Tony, I have sent you a few emails via your Winlink  address lately and each time winlink says nop such address.

Andy K3UK 

On Sun, Jan 17, 2021 at 5:45 PM Tony <73GUDDX@...> wrote:
All:

I observed an unusually fast file transfer while using VARA on 40 meters
today (see below). It's not uncommon to see speeds of 15,000 to 20,000
bytes/minute when the band is stable, but today's observation shows that
faster speeds are possible under the right conditions.

I should mention that the 30K b/m speed was recorded while receiving a
30K image.

Tony -K2MO



*** Winlink Vara Connection to KC8YJJ @ 2021/01/17 20:09:59  USB Dial:
7101.000
*** Station Bearing: 268,  Range: 393 miles
RMS Trimode 1.3.36.0
K2MO has 120 minutes remaining with KC8YJJ
{SFI = 078 On 2021-01-17 20:00 UTC}
[WL2K-5.0-B2FWIHJM$]
;PQ: 44766187
CMS via KC8YJJ >
    ;FW: K2MO
    [RMS Express-1.5.34.0-B2FHM$]

    ;PR: 17655197
    ; KC8YJJ DE K2MO (FN30JV)
    FF
;PM: K2MO 36Y27O2YLIPH 30887 73guddx@... ---
FC EM 36Y27O2YLIPH 32990 30887 0
F> C5
    FS Y
*** Receiving 36Y27O2YLIPH
*** 36Y27O2YLIPH - 33005/30899 bytes received
*** Bytes: 31145,  Time: 01:03,  bytes/minute: 29618
    FF
FQ
*** --- End of session at 2021/01/17 20:11:49 ---
*** Messages sent: 0.  Total bytes sent: 0,  Time: 01:49, bytes/minute: 0
*** Messages Received: 1.  Total bytes received: 31145,  Total session
time: 01:49,  bytes/minute: 17035
*** Disconnected from Winlink RMS: KC8YJJ @ 2021/01/17 20:11:56
*** Session: 1.9 min;  Avg Throughput: 15552 Bytes/min;   1 Min Peak
Throughput: 15552 Bytes/min







VARA HF Modem Speeds

Tony
 

All:

I observed an unusually fast file transfer while using VARA on 40 meters today (see below). It's not uncommon to see speeds of 15,000 to 20,000 bytes/minute when the band is stable, but today's observation shows that faster speeds are possible under the right conditions.

I should mention that the 30K b/m speed was recorded while receiving a 30K image.

Tony -K2MO



*** Winlink Vara Connection to KC8YJJ @ 2021/01/17 20:09:59  USB Dial: 7101.000
*** Station Bearing: 268,  Range: 393 miles
RMS Trimode 1.3.36.0
K2MO has 120 minutes remaining with KC8YJJ
{SFI = 078 On 2021-01-17 20:00 UTC}
[WL2K-5.0-B2FWIHJM$]
;PQ: 44766187
CMS via KC8YJJ >
   ;FW: K2MO
   [RMS Express-1.5.34.0-B2FHM$]

   ;PR: 17655197
   ; KC8YJJ DE K2MO (FN30JV)
   FF
;PM: K2MO 36Y27O2YLIPH 30887 73guddx@gmail.com ---
FC EM 36Y27O2YLIPH 32990 30887 0
F> C5
   FS Y
*** Receiving 36Y27O2YLIPH
*** 36Y27O2YLIPH - 33005/30899 bytes received
*** Bytes: 31145,  Time: 01:03,  bytes/minute: 29618
   FF
FQ
*** --- End of session at 2021/01/17 20:11:49 ---
*** Messages sent: 0.  Total bytes sent: 0,  Time: 01:49, bytes/minute: 0
*** Messages Received: 1.  Total bytes received: 31145,  Total session time: 01:49,  bytes/minute: 17035
*** Disconnected from Winlink RMS: KC8YJJ @ 2021/01/17 20:11:56
*** Session: 1.9 min;  Avg Throughput: 15552 Bytes/min;   1 Min Peak Throughput: 15552 Bytes/min


new SW Radiogram program

 

Hello to all the digital folks out there.
 
A new program for the Shortwave Radiogram broadcasts has now been posted on the SW Radiogram website. 
 
If you're new to decoding digital, this is a pretty nice way to get your feet wet. You can use your desktop or laptop, or you can use an Android device such as a smartphone or tablet. You can find links to the SW Radiogram website, software for decoding, and wiki articles with extensive details and help at: http://www.udxf.nl/events.html.  
 
If you'd like to see a list of web receivers (which are often reported as being used), receiver, transceiver and SDR applications and more,  take a look at the SW Radiogram gateway at https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
 
Help is also available on Facebook and Twitter. The SW Radiogram website has the links. 
 
Radio Northern Europe International has announced its new schedule for program 13.  
See https://rnei.org/2021/01/10/radio-northern-europe-international-show-13-announcement/ for more information. You can read about HamDRM (also known
as WinDRM) at https://www.sigidwiki.com/wiki/WinDRM
 
A tip for decoding PSK500 per Roger on the World of Radio reflector...
Sending PSK as AM modulation is less of a problem, but demodulation in AM should be avoided! I recommend separate demodulation in USB and LSB, 
ideally from an IQ recording. In the case of the AM sum signal (left+right), there is often a destructive phase overlap and decoding problems.
 
Here's hoping for good propagation 


new SW Radiogram program

 

Hello to all the digital folks out there.
 
A new program for the Shortwave Radiogram broadcasts has now been posted on the SW Radiogram website. Watch out for a mystery mode under some music at the end of the program. 
 
If you're new to decoding digital, this is a pretty nice way to get your feet wet. You can use your desktop or laptop, or you can use an Android device such as a smartphone or tablet. You can find links to the SW Radiogram website, software for decoding, and wiki articles with extensive details and help at: http://www.udxf.nl/events.html.  
 
If you'd like to see a list of web receivers (which are often reported as being used), receiver, transceiver and SDR applications and more, 
take a look at the SW Radiogram gateway at https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
 
Help is also available on Facebook and Twitter. The SW Radiogram website has the links. 
 
Radio Northern Europe International also uses digital modes during its broadcasts. See https://rnei.org/ for more information.
   
Here's hoping for good propagation 


Re: European PSK on 40m ? PSK that dead ?

Graham
 

Andy, 

Setting just 'psk' in the map , produces a large number of qso'a 
Spread over the hf bands .. 

73 Graham
G0nbd


20M activity around 14070 today

Andrew OBrien
 

       
WT9S 20m OLIVIA 1911 miles 17:26:06
NR4A 20m OLIVIA 980 miles 17:04:53
N6CRR 20m PSK 2147 miles 17:57:31
W3BUG 20m PSK 240 miles 14:52:10
W4PKU 20m PSK 281 miles 14:40:26
ON3ANY 20m PSK 3773 miles 14:30:58
KB2DJJ 20m PSK 288 miles 14:22:09
N3OWM 20m PSK 1083 miles 20:36:02
KC3FL 20m PSK 949 miles 20:25:31
KD0UN 20m PSK 717 miles 20:24:05
WA1QZK 20m PSK 424 miles 20:24:03
W4VON 20m PSK 540 miles 20:22:11
KM4CQG 20m PSK 1049 miles 20:09:50
W7JIF 20m PSK 1880 miles 19:55:49
W4IOS 20m PSK 391 miles 19:40:48
NH7WB 20m PSK 1320 miles 19:40:09
KM4UDX 20m THOR 265 miles 15:28:52

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