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FRB024 > SWL 24.01.21 18:02l 123 Lines 3313 Bytes #999 (0) @ WW
BID : 1084_FRB024
Read: GAST
Subj: New release of MULTIPSK (4.45)
Path: DBO595<DBX320<DBX233<VB1BOX<NL3VKL<NL3PRC<HB1BBS<BBS519<FRB024
Sent: 210124/1611Z 1084@FRB024.#24.FGAQ.FRA.EU.WW BPQ6.0.19
*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 <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
<http://f6cte.free.fr/index_anglais.htm>).
The mirror site is Earl's, W8BR:
https://www.paazig.net/f6cte/MULTIPSK_setup.exe
<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
<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
<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
**
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