Mass Rdm600 Radio Data Modem Datasheet Manual

							RDM 600  Radio Data Modem 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: [email protected] Web Site: http://www.mass.co.uk The RDM 600 is a rugged lightweight modem designed specifically for low power 
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 12-
Bit DAC, ADC and DUART. Silicon Valley Group is a leading UK 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 
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CRM 
 
SVC 
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 General  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