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RDM 600
Radio Data Modem
The RDM 600 is a rugged lightweight modem designed specifically for low power
Silicon Valley Group
is a leading UK
consumption in harsh conditions. Developed initially by MASS as a key component
of the ATRACKS helicopter and ground data tasking system, the RDM 600 is a
bespoke modem designed to pass data through HF or VHF radios.
FEATURES
• Lightweight serial modem with full
handshaking and independent radio
pre-keying
• HF or VHF compatibility
• Synchronous or Asynchronous
operation
• Selectable baud rates 75 to 2400
(with design options for higher rates)
• Up to 4 pre-set protocols,
• Supports remote configuration for
most Mil-Std and STANAG protocols.
• Balanced 600-Ohm audio output with
4 level settings
• Transmit and receive status
indicators
• Very low power consumption
• Wide operating temperature range
• Full airworthiness (Form 100A)
clearance
• Lightweight, fully rugged design
• Small footprint
INTERFACES
Data input is through a standard
asynchronous RS232 serial port, with full
handshaking, radio pre-keying and
connections for remote configuration.
Synchronous data input is also supported
at standard RS232 signal levels.
A balanced 600-Ohm audio interface is
designed to connect directly with
existing VHF and HF Clansman radios.
Input and output levels are adjustable
from 30mV to 2V. The radio keying
operates open circuit, short circuit
contacts capable of sinking 100mA.
Alternative audio interfaces to meet
other customer requirements are
available.
PROTOCOLS
The RDM 600 currently supports the
Mil-Std 118-110A Single Serial Tone
and STANAG 4285 protocols.
Alternative serial modem protocols to
meet customer requirements are
externally programmable.
INTERNAL SPECIFICATIONS
The core of the RDM is run by a 16-Bit
fixed point DSP running at 75 MIPS.
The DSP can access up to 64K of
external SRAM and 8M bits of flash
memory and peripherals such as a 12Bit DAC, ADC and DUART.
Systems Organisation focusing on
Information Technology,
Communications, Real-Time Systems
and Electronics. A successful track
record exists in:
• Technical Consulting
• Managed Services
• Technical Resourcing
• Total System Solutions
Silicon Valley Group operates through
four complementary trading arms:
MASS
Electronic Warfare
Managed IT Services
Information Systems Development
Secure Communications
Specialist Electronic Systems
Technical Consultancy
SVS
Air Traffic Management
Airport Systems
Commercial IT
CRM
SVC
Human Resourcing
Technical Recruitment
4MAT
Recruitment Solutions
Web Site Hosting
For further information on any of
our products or services please
write to Grove House or
telephone and we will be
delighted to help.
MASS
Grove House
Rampley Lane
Little Paxton St Neots
Cambridgeshire PE19 6EL
Tel: +44 (0)1480 222600
Fax: +44 (0)1480 407366
E-mail: systems@mass.co.uk
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General
RDM 600
Radio Data Modem
Audio Output Balanced 600 Ohm with 4 setting levels and independent radio keying
Designed to work with HFand VHF audio radios
Protocols 3 selectable protocols:
Mil Std 118-110A
STANAG 4285
Programmable for other protocols
Baud Rates 75, 150, 300, 600, 1200, 2400
Size 150 x 200 x 36 mm
Weight 930 gm
Operation
Radio keying open circuit, short circuit contacts capable of sinking 100mA
Synchronous (selectable) Provides hardware handshake and clock to SDT-500 encryptor
Asynchronous (selectable) 75-2400 baud – 8 bit – no parity
Gain (selectable) Input & output levels from 30mV to 2V
Indications Message being Transmitted
Message being Received
Remote configuration from aircraft data terminal (Air System mode)
Power
Requirement 9 – 36V DC
Consumption <1.75W @ 28V
Interfaces
IN RS232 Serial
9600 baud – 8 bit - even parity – hardware handshaking
OUT RS232 Serial
Sync: provides clock source, or
Async: Baud Rates 75 - 2400
Environmental
Temperature -40 to +75 °C (+90°C storage)
Humidity 35% to 85% (relative) (BS 3G.100 Part 2)
Pressure 523 mm Hg (10,000 ft)
Sustained Acceleration 6g for 10 s (DEF STAN 00-35:1999 (Part3)/3)
Vibration Helicopter (SK4) main fuselage zone mount.
(DEF STAN 00-35:1999 (Part3)/3)
Noise 140 dB, 31.5 to 10,000 Hz for 3 hours
(DEF STAN 00-35 (Part 3)/3)
EMC DEF STAN 95-41 (Part 3)/5
Power Supply DEF STAN 61-5 (Part 4)/2.
DEF STAN 61-5 (Part 6)/5.
BS 3G.100 : Part 3 : 1979
Microbiological DEF STAN 00-35 (Part 3)/3 Test CN1
Fluid DEF STAN 00-35 (Part 3)/3 Test CN4
Shock 30 g, 18 ms, 4 shocks (DEF STAN 00-35 (Part 3)/3)
Drop & Topple 10 to 50 mm, 12 shocks (DEF STAN 00-35 (Part 3)/3)
Bump 10 g, 18ms, 1002 shocks (DEF STAN 00-35 (Part 3)/3)
Tropical Exposure 95% rh, 20 to 35 °C (BS 3G.100 Part 2)
Drip-Proof (operational) 379 dm3/m2/hr (DEF STAN 00-35:1999 (Part3)/3)
Dust & Sand 2 kg/m3 Coarse grade, Turbulent, for 2 hours
(DEF STAN 00-35 (Part 3)/3)
Salt Atmosphere Salt spray at 15 to 35 °C for 2 hours,
then storage at 40 °C, 93% rh for 20 to 22 hours, repeated twice
(DEF STAN 00-35 (Part 3)/3)
Explosive Atmosphere PAEWG/R/2
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