924 FAX SYSTEM BROCHURE

High Frequency Single Sideband
Communications Systems
924 HF fax system
Fax over HF radio
The Barrett 924 Fax system is a simple and reliable hard
copy data transfer system for high frequency radio
network requiring minimal system setup and operator
training.
The Barrett 924 HF Fax system is ideal for providing fax
connections between sites that have no connection to
telephone systems.
An HF Fax station consists of a Barrett 950 transceiver
and 924 modem, a suitable power supply and antenna
and an inexpensive standard fax machine - No computer
or expensive software is required.
Operators simply establish a radio link by voice, selcall or
ALE, put the documents to be transmitted to the distant
station in the fax machine and dial in the remote stations
number - the system takes care of the rest. When the Fax
has been received by the remote station an
acknowledgment is printed on the local fax just as it would
when using a fax connected to a telephone line.
System setup is simple - enter the HF network
frequencies into the transceiver and enter the station's
radio call identification number through the fax keyboard.
The system is ready to send faxes.
Integrated into Barrett Communication's standard
equipment enclosure, the 924 Fax modem uses a
standard bus cable to connect it to a Barrett 950
transceiver.
For mobile operation the 924 modem operates with the
Barrett 950 remote control transceiver and commonly
available 12 volt fax machines.
The system uses the robust and high speed Clover 2000
protocol to transmit the fax digitally and error free. With
typical good HF conditions a standard page of text can be
sent in less than 3 minutes. Slightly longer than a
telephone fax but with no cost.
For future expansion the Barrett 924 Fax modem also
provides the same facilities as a Barrett 923 modem,
connected to a computer running Barrett 923 operating
software it provides computer to computer data transfer
with Internet connection.
Quality System
Certified to
ISO 9002
Registration No. 57114
High Frequency Single Sideband
Communications Systems
924 HF fax system specifications
924 Modem Specifications
Clover protocol
Minimum SNR for data transfer
-3 dB
Modulation Modes (Clover 2000)
16P4A - 16 Phase, 4 -Amplitude Mod, 16PSM - 16 - Level Phase Shift Mod,8P2A 8 Phase,2 Amplitude Mod, 8PSM - 8 level Phase Shift Mod, QPSM - 4-level Phase
Shift Mod, BPSM - binary Phase Shift Mod, 2DPSM 2-channel diversity, FSM
Frequency shift Mod, 4DPSM 4-channel diversity BPSM , 2DFSM 2-channel
diversity FSM
CCIR Emission
2K0H J2 DEN or 2K0H BEN
Fax port
Connector
Form
Loop
Off hook
Ring output
DTMF
Dial tone
Fax compatible
Fax data storage
RJ-11
Balanced and isolated
24VDC
20mA
100V p-p, 20Hz.
16 tones Tx or Rx
400Hz.
Group III (G3,T.30)
1 Meg standard (6 pages)
4 Meg optional (24 pages)
PC port
Connector
Interface
Data rate
DB9S
RS-232
9600 default (up to 57,600 bps max.)
Dimensions
950 local control
954 Fax modem
922 Power Supply
245mm x 330mm x 75mm
245mm x 310mm x 75mm
245mm x 310mm x 75mm
Interconnection Diagram
HF Link
3000km
912 Broadband Antenna
ON - VOL
TX
RX
LSB
AM
BARRETT
924
BARRETT
USB
ON - VOL
SEL
CHN
PRG
2182
ALARM
MUTE
TUNE
TEL
SEND
END
RX
LSB
AM
BARRETT
USB
CLFY
FRQ
CHN
CLFY
FRQ
AUTO
MODE
TX FQ
RESET
SEL
CHN
PRG
CLEAR
SCAN
PWR
2182
ALARM
MUTE
TUNE
4
RESET
TX
CHN
1
950
922
912 Broadband Antenna
BARRETT
924
7
2
5
8
0
6
CLFY
FRQ
CHN
CLFY
FRQ
AUTO
MODE
TX FQ
CLEAR
SCAN
PWR
4
950
9
BARRETT
CHN
1
3
922
TEL
SEND
END
7
2
5
8
0
3
6
9
BARRETT
FAX
FAX
BCB92400/1
924 Modem, 950
Transceiver and 922
Power supply.
Head Office:
Barrett Communications Pty Ltd P O Box 1214, Bibra Lake WA 6965 AUSTRALIA
Toll Free Tel: 1800 999 580 Tel: (618) 9434 1700 Fax: (618) 9418 6757
email: [email protected]
internet: www.barrettcommunications.com.au
European Office:
Barrett Europe Limited 19 Lenten Street Alton, Hampshire GU34 1HG
UNITED KINGDOM Tel: (44) 1420 542254 Fax: (44) 1420 543373
email: [email protected]
internet: www.barrettcommunications.com.au
924 Modem, 950
Transceiver and 922
Power supply.
Dealer Stamp
American Communication Systems
Discover the Power of Communications ™
TO ORDER – VISIT http://www.ameradio.com