Newsgroup: it.hobby.radioamatori
Titolo: Decodifica RTTY-FAX

Salve N:G sto tentando i decodificare i  vari segnali sicuramente il mio pc
disturba la ricezione non essendo un portatile ,ma comunque un minimo
accenno dovrei vederlo ,adopero il programma jvcomm,vi pongo delle domande,
le trasmissioni sono continue o a orari ben definiti ?quando setto il
programma per le cartine fax vedo solo una serie di puntini sbaglio
qualcosa? grazie .

 NKARA METEO, Turkey
====================
Surface Analysis:    0430, 0610, 0940, 1240, 1610, 1840, 2152
Surface Prognosis:   -
500hPa Analysis:     0640, 1910
500hPa Prognosis:    0330, 0910
Sea State Prognosis: -
Satellite Picture:   -
Tropical Warnings:   -
A < - > indicates that NO such data is transmitted
Frequencies:         6790.0, 3377.0 kHz
Rpm/IOC:             90/576
RN LONDON/NORTHWOOD, United Kingdom
===================================
QRA   QRG      TX-time    Pw
--------------------------------
GYA   02374.0  0000-2400  10
GYA   03652.0  0000-2400  10
GYA   04307.0  0000-2400  10
GYA   06446.0  0000-2400  10
GYA   08331.5  0000-2400  10
GYA   12844.5  0000-2400  10
GYA   16912.0  0000-2400  10
Transmissions details (times in GMT/UTC)
----------------------------------------
Surface Analysis:    0320, 0600, 0950, 1130, 1210, 1500, 1930, 1950
Surface Prognosis:   0400, 0730, 1150, 2025
500hPa Analysis:     -
500hPa Prognosis:    -
Sea State Prognosis: 1230, 2050
Satellite Picture:   0440, 1040, 1330, 1730
Tropical Warnings:   -
A < - > indicates that NO such data is transmitted
Used Rpm/IOC: 120/576
Rpm = Drum speed (line scan per minute)
IOC = Transmission module (Index Of Coperation)
                         =======================
Note: Weather faxes are sent most with an (I)ndex (O)f (C)orrelation
(IOC) of 576, and with (L)ines (P)er (M)inute (LPM) of 120.(the most
CIS stations use also 60 and 90 LPM).
Press faxes are most send with a IOC of 288 and a LPM of 60 (negat.!)
Technical specifications for F3C (example 120/576 on HF):
Class of emission:     F3C
Bandwith (f0=1900 Hz): White +400 Hz  (f0+400 Hz = 2300 Hz)
                       Black -400 Hz  (f0-400 Hz = 1500 Hz)
                       (Low freq. (30-300 kHz f0+-150 Hz)
Index of correlation:  576
Drum speed (LPM):      120
Scanning Line Density: 3.8 lines/mm
Scanning frequency:    120 lines/minute
Start signals:         Carrier modulated by 300 Hz for 5 seconds
Phasing signal:        BLACK signal interrupted by 1 WHITE phasing pulse
                       per revolution of the facsimile drum, transmitted
                       for at least 30 seconds prior to the transmission
                       of the chart.
Stop signals:          Carrier modulated by 450 Hz for 5 seconds followed
                       by 10 seconds of BLACK signal.
The list shows the carrier frequencies, use for USB -1.5 kHz
                                        use for LSB +1.5 kHZ
Here are a few stations send also text and pictures:
CALL         NAME           FREQUENCIES
========================================
LRO 26  AP Buenos Aires  05777.5/11480.0
3MA xx  CNA Tai-Pei      09430.0/13766.0/14685.0/15878.0/19680.0/22850.0
LRO xx  DyN Buenos Aires 08167.5/09242.0/11451.0
        KCNA Pyongyang   11475.7/13580.0
UJQ     Kiyev Radio      12828.0/19745.0
9VF     KYODO Singapore  16270.0/23765.0 Re-transmit from Tokyo R.
BDF     Shanghai Meteo   11420.0/18940.0
JJC     Tokyo Radio      04316.0/08467.5/12745.5/16971.0/17069.5/22542.0
UKA     Vladivostok R.   12813.0/17000.0
        XINHUA Beijing   07636.0
Radio amateurs 120/288 and 120/264, HamColor 360/204 and SSTV:
+/- 3605/3730/7040/14105/14232(USA)/21150/28200/28300(USA)/28685(Japan).
IARU Region 1 -> 3730-3740/7035-7045/14225-14235/21335-21345/28675-28685
                         =======================
Note: Weather faxes are sent most with an (I)ndex (O)f (C)orrelation
(IOC) of 576, and with (L)ines (P)er (M)inute (LPM) of 120.(the most
CIS stations use also 60 and 90 LPM).
Press faxes are most send with a IOC of 288 and a LPM of 60 (negat.!)
The freq. in the list shows the carrier frequencies, use for USB -1.5 kHz
                                                     use for LSB +1.5 kHZ
Here are a few stations send also text and pictures:
CALL         NAME           FREQUENCIES
========================================
LRO 26  AP Buenos Aires  05777.5/11480.0
3MA xx  CNA Tai-Pei      09430.0/13766.0/14685.0/15878.0/19680.0/22850.0
LRO xx  DyN Buenos Aires 08167.5/09242.0/11451.0
        KCNA Pyongyang   11475.7/13580.0
UJQ     Kiyev Radio      12828.0/19745.0
9VF     KYODO Singapore  16270.0/23765.0
BDF     Shanghai Meteo   11420.0/18940.0
JJC     Tokyo Radio      04316.0/08467.5/12745.5/16971.0/17069.5/22542.0
UKA     Vladivostok R.   12813.0/17000.0
        XINHUA Beijing   07636.0
                         =======================
Note: Weather faxes are sent most with an (I)ndex (O)f (C)orrelation
(IOC) of 576, and with (L)ines (P)er (M)inute (LPM) of 120.(the most
CIS stations use also 60 and 90 LPM).
Press faxes are most send with a IOC of 352 and a LPM of 60 (negat.!)
Technical specifications for F3C (example 120/576 on HF):
Class of emission:     F3C
Bandwith (f0=1900 Hz): White +400 Hz  (f0+400 Hz = 2300 Hz)
                       Black -400 Hz  (f0-400 Hz = 1500 Hz)
                       (Low freq. (30-300 kHz f0+-150 Hz)
Index of correlation:  576
Drum speed (LPM):      120
Scanning Line Density: 3.8 lines/mm
Scanning frequency:    120 lines/minute
Start signals:         Carrier modulated by 300 Hz for 5 seconds
Phasing signal:        BLACK signal interrupted by 1 WHITE phasing pulse
                       per revolution of the facsimile drum, transmitted
                       for at least 30 seconds prior to the transmission
                       of the chart.
Stop signals:          Carrier modulated by 450 Hz for 5 seconds followed
                       by 10 seconds of BLACK signal.
The list shows the carrier frequencies, use for USB -1.9 kHz
                                        use for LSB +1.9 kHZ
Here are a few stations send also text and pictures:
CALL         NAME           FREQUENCIES
========================================
LRO 26  AP Buenos Aires  05777.5/11480.0
3MA xx  CNA Tai-Pei      09430.0/13766.0/14685.0/15878.0/19680.0/22850.0
LRO xx  DyN Buenos Aires 08167.5/09242.0/11451.0
        KCNA Pyongyang   11475.7/13580.0
UJQ     Kiyev Radio      12828.0/19745.0
9VF     KYODO Singapore  16270.0/23765.0 Re-transmit from Tokyo R.
BDF     Shanghai Meteo   11420.0/18940.0
JJC     Tokyo Radio      04316.0/08467.5/12745.5/16971.0/17069.5/22542.0
UKA     Vladivostok R.   12813.0/17000.0
        XINHUA Beijing   07636.0
Chart (UNID) indentification:
1- Find out the technical parameters (LPM/IOC), only stations working
   with Russian equipment using LPM 90, that are normally CIS stations
   or Ankara Meteo.
2- If the station transmitting in LSB/288/352 (negativ) and LPM 60 it is
   normally a Press photo station ie 60/352 or 60/288
3- Look in the corner of the chart for a indentification (4) number.
   The first two numbers is the orginating center indicator (distributed
   the chart).
   01-09 WMCs:   01-03 Melbourne; 04-06 Moscow; 07-09 Washington.
   10-25 AFRICA: 10+11 Cairo; 12+13 Dakar; 14+15 Nairobi; 16+17
                 Antanarivo 18+19 Tunis; 20 LasPalmas; 21 El Djazair;
                 22+23 Lagos
   26-40 ASIA:   26+27 Khabarovsk; 28+29 Delhi; 30+31 Novosibirsk; 32+33
                 Tashkent; 34+35 Tokyo; 36 Bangkok; 37 Ulan Bator; 38+39
                 Beijing.
   41-50 S.AMERICA: 41+42 Buenos Aires; 43+44 Brasilia; 45 Santiago.
   51-63 N+C AMERICA: 51+52 Miami; 53+54 Montreal; 55 San Francisco; 56
                 Washington.
   64-73 PACIFIC: 64 Honolulu; 65+66 Darwin; 67+68 Melbourne; 69+70
                 Wellington.
   74-98 EUROPE: 74+75 Bracknell; 76+77 Moscow; 78+79 Offenbach;
                 80+81 Rome; 82+83 Norrkoeping; 84+85 Paris; 86 Helsinki;
                 87 Belgrade; 88 Oslo; 89 Prague; 90 Episkopi; 91 Ankara;
                 92 Frankfurt; 93 London; 94 Copenhagen; 95 Rota;
                 96 Athens
   The last two numbers is the serial chart number by that center.
   Example: 9220   92= WAFC Frankfurt (EDZW) serial number 20
            6411   64= RAFC Honolulu serial number 11
   Note: some stations using 5 numbers, than take the last four numbers.
4- Look for a four letter location indicator.
   ADDN Darwin; AMMC Melbourne; BABJ Beijing; DEMS Delhi; EDZW Offenbach;
   EGRR Bracknell; EKMI Danish Met; FAPR Pretoria; FMEE Saint Denis;
   GOOY Dakar; HECA Cairo; HKNC Nairobi; KWBC Washington;KGWC Offut (USAF);
   LEMM Madrid; LERT Rota; LFPW Toulouse; LIIB Roma; LTAA; Ankara; OKPR
   Praque; RJTD Tokyo; RKSL Seoul; RUHB Khabarovsk; RUMS Moscow; RUNW Novo-
   sibirsk; RUTK Tashkent; SABM Buenos Aires; UKBB Kiyev; VTBB Bangkok.
-----------------------------------------------------------------------
| Last Revised: 12th Mar-94                                           |
-----------------------------------------------------------------------
Technical specifications for F3C (example 120/576 on HF):
Class of emission:     F3C
Bandwith (f0=1900 Hz): White +400 Hz  (f0+400 Hz = 2300 Hz)
                       Black -400 Hz  (f0-400 Hz = 1500 Hz)
                       (Low freq. (30-300 kHz f0+-150 Hz)
Index of correlation:  576
Drum speed (LPM):      120
Scanning Line Density: 3.8 lines/mm
Scanning frequency:    120 lines/minute
Start signals:         Carrier modulated by 300 Hz for 5 seconds
Phasing signal:        BLACK signal interrupted by 1 WHITE phasing pulse
                       per revolution of the facsimile drum, transmitted
                       for at least 30 seconds prior to the transmission
                       of the chart.
Stop signals:          Carrier modulated by 450 Hz for 5 seconds followed
                       by 10 seconds of BLACK signal.

 >grazie delle informazioni

--------------------------------
Inviato via 
http://arianna.libero.it/usenet/

 disturba la ricezione non essendo un portatile ,ma comunque un minimo
Apri l'alimentatore del computer e sostituisci la presa 220V con una uguale
ma con filtro di rete (i vecchi computer la possedevano tutti;ora per motivo
di costi all'osso non piu). Vedrai che ogni disturbo, anche minimo, sparirą.
Io ho fatto da poco l'operazione ed ora il "solo" (si fa per dire) QRM č
quello delle lampade alogene degli inquilini (tutte le sere dalle 17 in
poi).
Prova.. Roby (I3BZK)


 ha scritto nel messaggio
news:ABGwd.305699$b5.14...@news3.tin.it...
