JVFAX 60 Interfaces Teil 1 von
Manfred Jost
Jo...@Comp.Snads.Philips.Nl
DH0KAI @ DB0ACH
Datum 12.01.96
## Nachricht vom 11.01.96 weitergeleitet
## Ursprung : Manfred Jost@AC2
## Ersteller: Manfred Jost@AC2
Von : Manfred Jost @ AC2 (Do, 11.01.96 18:23)
An : Manfred Jost @ AC2
Speaker:
========
audio is generated through the PC's built in speaker.
you can use a simple low pass filter to obtain a signal that can be
fed to your transmitter's microphone input jack:
100 nF
to 220 10k
speaker ³³ ÚÄÄÄ¿ ÚÄÄÄ¿
OÄÄÄÄÄ´ÃÄÄ´ ÃÄÛÄ´ ÃÄÛÄÄÄÄÄ¿
³³ ÀÄÄÄÙ ³ ÀÄÄÄÙ ³ ³ 10k
³ ³ ÚÁ¿ v: depends on your
TX's
(use the lead) ³ ³ ³ ³ ÚÄÄÄ¿input
characteristic
(that gives maximum) ³4n7 ³4n7 ³ ³ÄÄÄ´ ÃÄÄÄO
(audio output) ÄÁÄ ÄÁÄ ³ ³ ÀÄÄÄÙ to
ÄÂÄ ÄÂÄ ³ ³ 1k-100k transmitter
³ ³ ÀÂÙ ÚÄÄÄÄÄÄÄO
OÄÄÄ¿ ³ ³ ³ ³ 100 nF means .1
æF
³ ³ ³ ³ ³ 4n7 means .0047
æF
GND ÄÁÄ ÄÁÄ ÄÁÄ ÄÁÄ ÄÁÄ
Serial audio:
=============
works like the above one, but audio is generated on the TxD line of
a
serial port. You must enter the base address of your serial port
into the address field.
You can use the same low pass filtering as above to connect the TxD
pin of the serial port to your transmitter's input.
Serial port:
============
when having selected this option, no audio is generated by the
computer. Instead, the digital intensity information is being
output
to the TxD line of the serial port (0 for black, 63 for white,
etc.)
The format 8N1 is used, with the baud rate selected in the baud
rate
field.
Your modulator must parallelize this information, convert it to an
analogue signal and feed a voltage controlled audio generator with
it.
An example modulator that works this way is shown in the file
"MODULAT.GIF"
Output values above 63 indicate a remote control command to a
demodulator being eventually connected to the same port, with the
exception of the following:
125: generate 1100 Hz audio ;as SSTV sync signal
126: " 1200 Hz " ;all values are in decimal
127: " 1300 Hz "
The differentiation between 1100,1200 and 1300 Hz is to enable VIS
signalling.
To simplify things, you can generate a 1200 Hz tone whenever values
greater than 63 and less then 128 are being output.
If you don't want to transmit in SSTV you can forget about all that
1200 Hz stuff.
Parallel port:
==============
like above, but data is being output via a parallel port, e.g. a
printer port.
IBM parallel port 25 pin connector:
===================================
/Strobe 1 ÄÄÄO
D0 2 ÄÄÄO OÄÄÄ 14 /Auto feed
D1 3 ÄÄÄO OÄÄÄ 15 /Fault
D2 4 ÄÄÄO OÄÄÄ 16 /Reset
D3 5 ÄÄÄO OÄÄÄ 17 /Select in
D4 6 ÄÄÄO OÄÄÄ 18 GND
D5 7 ÄÄÄO OÄÄÄ 19 GND
D6 8 ÄÄÄO OÄÄÄ 20 GND
D7 9 ÄÄÄO OÄÄÄ 21 GND
/ACK 10 ÄÄÄO OÄÄÄ 22 GND
Busy 11 ÄÄÄO OÄÄÄ 23 GND
PE 12 ÄÄÄO OÄÄÄ 24 GND
Select 13 ÄÄÄO OÄÄÄ 25 GND
Signals which are preceeded with a "/" are active low.
IBM serial port 25 pin connector:
=================================
Prot.GND 1 ÄÄÄO
TXD 2 ÄÄÄO OÄÄÄ 14
RXD 3 ÄÄÄO OÄÄÄ 15
RTS 4 ÄÄÄO OÄÄÄ 16
CTS 5 ÄÄÄO OÄÄÄ 17
DSR 6 ÄÄÄO OÄÄÄ 18
GND 7 ÄÄÄO OÄÄÄ 19
DCD 8 ÄÄÄO OÄÄÄ 20 DTR
9 ÄÄÄO OÄÄÄ 21
10 ÄÄÄO OÄÄÄ 22 RI
11 ÄÄÄO OÄÄÄ 23
12 ÄÄÄO OÄÄÄ 24
13 ÄÄÄO OÄÄÄ 25
IBM serial port 9 pin connector:
================================
DCD 1 ÄÄÄO
RXD 2 ÄÄÄO OÄÄÄ 6 DSR
TXD 3 ÄÄÄO OÄÄÄ 7 RTS
DTR 4 ÄÄÄO OÄÄÄ 8 CTS
GND 5 ÄÄÄO OÄÄÄ 9 RI
Configuration hints on some demodulators
========================================
Here is shown what you should enter in the demodulator/modulator
field of the configuration menu when using the following devices:
EASYFAX:
========
Demodulator: 8 bits on serial port; Baud rate 57600
Modulator: 6 bits on serial port LSB-SSTV-sync: yes
Do not use the "serial port/ser" option for demodulator. This would
work too, but using the "serial port" interfacing gives better
results.
Port addresses depend on what serial port your Easyfax is
connected to.
HARI-FAX:
=========
Demodulator: 8 bits on serial port/ser. Baud rate 38400
LSB-SSTV-sync: no
Modulator: use Speaker or serial audio with the circuit
described above
Port address for "demodulator" depends on what serial port your
HARI-FAX is connected to.
DL5JM demodulator/modulator:
============================
- no longer available -
WRAASE MR-9202:
===============
Demodulator: 8 bits on serial port; Baud rate: doesn' matter
LSB-SSTV-sync: doesn't
matter
Modulator: use Speaker or serial audio with the circuit
described above
Port address for "demodulator" depends on what serial port your
WRAASE RECEIVER is connected to.
NSK-demodulator:
================
Demodulator: 7 bits on serial port Baud rate: doesn't matter
LSB-SSTV-sync: no
Modulator: use Speaker or serial audio with the circuit
described above
Port address for "demodulator" depends on what serial port your
NSK demodulator is connected to.
BPF2 (8 bit version):
=====================
Demodulator: 7 bits on BPF 2 (8 bit) Baud rate 57600
LSB-SSTV-sync: no
Modulator: use Speaker or serial audio with the circuit
described above
Port address for "demodulator" depends on what serial port your
BPF 2 is connected to. Becker & Poth deliver a "8 bit" version
of the BPF 2, specially designed for use with JVFAX.
There is a "9 bit" version of the BPF 2, too, which will currently
not work with JVFAX.
A short list of (german) demodulator/modulator suppliers known to
me:
=====================================================================
This list will certainly be incomplete, and the ordering of the
addresses will not tell anything about the quality of the
interfaces
being offered.
All these interfaces should co-operate with JVFAX, but in no case
I can guarantee for that.
"HamComm" interface (comparator type) by Dieter Dippel, DF4RD:
Ready-to-run HamComm-Interfaces can be ordered from Dieter
Dippel, DF4RD. They are build with SMD
(Surface-Mounted-Device) components and housed in a case
similar to a mouse-adapter. There are two versions available
for 9-pin or 25-pin COM ports.
__ __ __
_| |_________________| |_
| | | |
COM-Port | | SMD-HamComm | | RX/TX app.
9-pin female | | Interface | | 9-pin male 35mm
|_| _________________ |_|
|__| |__| __
| app. 60mm |
__ __
_| |_____
| | \
| | \ __
| | \_______| |_
| | | |
COM-Port | | SMD-HamComm | | RX/TX app.
25-pin female | | Interface | | 9-pin male 55mm
| | ______ |_|
| | / |__|
| | /
|_| _____ / |
|__| | __
|
| app. 60mm |
The interface also works with SSTVFAX, PKTMON, EASYFAX and
the well-known HamComm (rtty/amtor/cw) program by Django Schroeder,
DL5YEC.
For more information please request an updated price list and
terms of delivery from
Dieter Dippel, DF4RD
Fenitzerstr. 33
D-90489 Nuernberg
Phone/Fax: (0) 911 / 55 92 96 between
Mo. - Fr. 18:00 and 20:00 german local time
or 17:00 and 19:00 UTC
"EASYFAX" kit from Ulrich Bangert, DF6JB:
Ulrich developed a superb æP-based transmit/recieve interface that
is
easy to assemble and that needs absolutely no alignment. It can
handle
up to 256 intensity levels, AM and FM FAX as well as SSTV.
The interface is offered as a complete kit including a preassembled
case and can be easily updated by EPROM exchange.
Ulrichs address:
Ulrich Bangert
DF6JB
Ortholzer Weg 1, Klein Ippener
27243 Gross Ippener
Tel.: 04224/431
"MMI" by C-Data:
Address:
C-Data
Hohenwarter Str. 6
85276 Pfaffenhofen
Tel.: 08441/6145
"DK8JV-FAX-Konverter" by NSK:
A 64 grey scale demodulator for AM and FM FAX
Address:
Ingenieurbuero fuer Satellitentechnik
Dipl.-Ing. B. Ewert
Muehlenweg 11
24217 Stakendorf
Tel.: 04344/6758
"Meteosat-Empfangs-Set"
Complete rig for the reception of geostationary weather satellites
such as Meteosat, including receiver, antenna and interface.
Available from
Fa. Bogerfunk
Funkanlagen GmbH
Grundesch 15
88326 Aulendorf
Tel.: 07525/451
"WX-Satelliten-Empfaenger MR-9202"
A 137-Mhz receiver for polar orbiting satellites with a built-in
interface.
Available from:
Volker Wraase Elektronik
Kronsberg 10
24161 Altenholz
Tel.: 0431/32528
"BPF 2"
A æC controlled subminiature FM demodulator is supplied by
Ingenieurbuero Becker & Poth GmbH
Duesselthaler Str. 49
40211 Duesseldorf
Tel: 0211/9061340
"HARI-FAX"
A æC controlled AM/FM fax demodulator that can deliver up to 256
intensity levels. Available as kit or as assembled board.
Fa. Siegfried Hari
Spessartstr. 80
63448 Seligenstadt
Both the Easyfax and the Hari-Fax interface support remote control
of the interface by the JVFAX program.
## CrossPoint v2.1 ##