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IMARK   MRS209  Mobile Repeater System

 

Compact ÁProcessor controlled transceiver to convert mobile radio to cross-band repeaters

Imark Stock # See listing below

Features:

  • Compact size
  • Meets Base Station Specifications
  • Multi-Tone CTCSS Encoder/Decoder
  • Selective Calling Encoder/Decoder
  • DTMF Encoder/Decoder (Optional)
  • Encryption (Optional)
  • Weather resistant Diecast Housing
  • Watchdog Timer for 100% CPU Reliability
  • Heartbeat to prevent MRS to MRS Interference
  • PC Programmable & MRS to MRS Cloning
  • Various LED status indicators

 

DESCRIPTION:

The IMARK MRS209 ÁProcessor controlled transceiver is designed to be fitted to a mobile transceiver and convert the package into a cross-band mobile repeater. The MRS209 is compact enough to be attached to a mobile transceiver thus reducing the DC & interface wiring to the minium.

The IMARK MRS209 includes a Kyodo synthesised RF module and is available for all FM frequency bands from 66 to 520 MHz. These modules provide up to 5 Watts RF power output with 2.5ppm frequency accuracy and low noise figures. As the MRS uses the RF section from the KG209 portable transceiver, the performance specifications are therefore the same as the Kyodo KG209 specifications.

The Imark developed control and audio circuits are coupled with the RF section to form a complete compact module suitable for interfacing to a typical mobile radio thus turning the mobile into a full cross-band repeater/translator.

The MRS includes various I/O functions via a multi-pin connector that enables easy interface to all manner of equipment. These I/O connections include Active High or Active Low PTT In, Active High or Active Low Busy Output, TX Audio In, RX Audio Out, Microphone In, and Speaker Out functions.

On board features include Watchdog for 100% CPU reliability, CTCSS encoding & decoding, 5 Tone Selective calling, Audio Encryption, and optional DTMF Encoder/Decoder.

The MRS is housed in an "O" Ring sealed Aluminium diecast housing to provide heat dissipation, weather resistance, rugged protection, and a very lightweight, compact enclosure.

 

 

MODEL DETAILS:

Frequency/Channel Band

Power

Model #

Imark Stock #

66 - 88 MHz, 12.5 KHz 1 - 5 Watts MRS209-08A05N  
66 - 88 MHz, 25/30 KHz 1 - 5 Watts MRS209-08A05W  
136 - 162 MHz, 12.5 KHz 1 - 5 Watts MRS209-15A05N  
136 - 162 MHz, 25/30 KHz 1 - 5 Watts MRS209-15A05W  
146 - 174 MHz, 12.5 KHz 1 - 5 Watts MRS209-15B05N  
146 - 174 MHz, 25/30 KHz 1 - 5 Watts MRS209-15B05W  
176 - 208 MHz, 12.5 KHz 1 - 5 Watts MRS209-20A05N  
176 - 208 MHz, 25/30 KHz 1 - 5 Watts MRS209-20A05W  
208 - 248 MHz, 25/30 KHz 1 - 5 Watts MRS209-20B05N  
240 - 276 MHz, 12.5 KHz 1 - 5 Watts MRS209-20C05W  
240 - 276 MHz, 25/30 KHz 1 - 5 Watts MRS209-20C05W  
335 - 365 MHz, 12.5 KHz 1 - 5 Watts MRS209-40A05N  
335 - 365 MHz, 25 KHz 1 - 5 Watts MRS209-40A05W  
365 - 400 MHz, 12.5 KHz 1 - 5 Watts MRS209-40B05N  
365 - 400 MHz, 25 KHz 1 - 5 Watts MRS209-40B05W  
400 - 435 MHz, 12.5 KHz 1 - 5 Watts MRS209-40C05N  
400 - 435 MHz, 25 KHz 1 - 5 Watts MRS209-40C05W  
440 - 475 MHz, 12.5 KHz 1 - 5 Watts MRS209-40D05N  
440 - 475 MHz, 25 KHz 1 - 5 Watts MRS209-40D05W  
465 - 500 MHz, 12.5 KHz 1 - 5 Watts MRS209-40E05N  
465 - 500 MHz, 25 KHz 1 - 5 Watts MRS209-40E05W  
485 - 520 MHz, 12.5 KHz 1 - 5 Watts MRS209-40F05N  
485 - 520 MHz, 25 KHz 1 - 5 Watts MRS209-40F05W  

 

SPECIFICATIONS:

General Details
Number of Channels 1 standard, Up to 200 with external serial programming
Channel Spacing 12.5KHz, 20KHz, 25KHz, or 30KHz (5/6.25/10/12.5 KHz PLL steps)
Operation Mode Two frequency simplex
Antenna Impedance 50WUnbalanced
Transmitter  
RF Power Output Two settings between 1 and 5 Watts
Maximum Frequency Deviation Wide band: 5 KHz, Narrow Band: 2.5 KHz, Channel Selectable
Frequency Stability Wide Band: 0.0005%, Narrow band: 0.0003%
Frequency Response Within +1, -3dB of 6dB/Octave pre-emphasis from 0.3 to 3.0KHz, 1 KHz reference
Signal To Noise Ratio Wide Band: More than 50dB at 1 KHz 70% Modulation

Narrow Band: More than 45dB at 1 KHz 70% Modulation

Modulation Distortion Less than 3% at 1 KHz 70% Modulation
Spurious and Harmonics More than 70dB below rated power
Receiver  
Intermediate Frequencies 1st IF: 48.5 MHz, 2nd IF: 455 KHz
Frequency Stability Wide Band: 0.0005%, Narrow band: 0.0003%
Sensitivity Less than 0.4ÁV for 20 dB noise quieting

Less than 0.3ÁV for 12 dB SINAD

Squelch Sensitivity Less than 0.25ÁV
Selectivity More than 70dB at 25 KHz
Blocking More than 90 dB
Intermodulation More than 70 dB
Spurious Response More than 70 dB
AF Response Within +1, -3dB of 6dB/Octave de-emphasis from 0.3 to 3.0 KHz, 1 KHz reference
AF Distortion Less than 5% at 1 KHz 70% modulation
Signal to Noise Ratio Wide band: More than 50dB at 1 KHz 70% modulation

Narrow Band: More than 45dB at 1 KHz 70% modulation

Power Supply Module  
DC Input Voltage 13.8 10% Volts DC
Current Requirements 130mA (Standby), 170mA (Active), 1.55 Amps (Transmit)
Physical  
Unit Dimensions 170 (W) x 90 (D) x 25 (H) mm (excluding protrusions)
Shipping Dimensions 225 (W) x 150 (D) x 540 (H) mm
Weight: 610 grams
Shipping Weight: 690 grams
Standards AS4265
Imark Stock # See Following Table
Inclusions Operators Manual, DC Cable
Options  

 


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