1. Portable transceivers
2. Mobile transceivers
3. Repeaters
4. Fixed transceivers
• • • PORTABLE TRANSCEIVERS PRS-600
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PRS-600 series of portable VHF/UHF transceivers is designed to fulfill requirements of present and future Professional Mobile Radio networks (PMR). Robust and waterproof case of ergonomic design, as well as wide assortment of miscellaneous accessories, provides successful operation even under specific environment conditions.
Main features:
• Microprocessor controlled
• Digital frequency synthesis (PLL)
• Up to 400 channels
• Programmable output power levels
• Selective call and ID functions
• Sub-audio tones (CTCSS)
• Field programmable devices
• Embedded voice encryption (option)
• Wide assortment of the accessories (antennas, battery chargers, extended speaker/microphone etc.)
PRS-600 series - Data sheet (246K) 
• • • MOBILE TRANSCEIVERS MRS-500 AND MRS-600D
MRS-500 series of transceivers is distinguished by exceptional electrical and functional characteristics. Upgrading of the basic versions resulted in introduction of more complex transceivers - MRS-500/Ke series.
Modular concept of the transceiver, as well as wide assortment of specific devices and miscellaneous accessories, enables forming of different configurations:
• Mobile station with direct control
• Mobile station with extended control
• Fixed station
• Fixed station with interconnection to telephone line
• Central (Base) station with Sel Call and ID processing, and with interconnection to telephone line
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MRS-500/Ke - Configurations (636K)
Main features:
• System oriented transceivers
• DVP interface
• Detachable Control panel
• Ergonomic controls
• Effective indications
• Extended Sel Call features
• Large variety of accessories
MRS-500/Ke series - Data sheet (610K)
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MRS-600D series of duplex transceivers is designed for primary use in data (or combined data&voice) transmission networks. The transceiver has to be used with accompanying terminal equipment. Control functions are provided through serial communication RS-232 interface.
Depending on application, transceiver can be equipped with different types of built-in (auxiliary) receivers - satellite navigation (GPS/GLONASS) receiver, or radio beacon receiver. Multiple interfaces for external sensors are also provided.
Main features:
• Robust construction, adapted to extreme exploitation conditions
• Multi-layer printed circuit boards and Surface Mount Technology
• Very fast and stable frequency synthesizers
• Transmitted and reflected power detection; efficient protection from high reflection on antenna connector
Example of the typical application can be found in ASU-2000 - Automated System for Urban public transport control.
• • • REPEATERS RRS-400-4 AND RRS-600
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Performances of the RRS-400 series can satisfy even the strongest demands for implementation of mobile and fixed radio communication networks. These system-oriented transceivers distinguish with exceptional reliability and embedded characteristics that ensure very efficient operation on common sites, i.e. in close proximity of radio communication devices of different types. Extreme simplicity of servicing (even in the field conditions) represents additional convenience.
Main features:
• Robust construction, highly resistant in the extreme exploitation conditions
• Close tolerances of operating frequencies
• High RFI immunity
• Built-in battery charger
• Ferrite circulator (option)
• DVP (option)
FRS/RRS-400-4 series - Data sheet (516K)
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RRS-600 series of VHF/UHF FM repeaters is designed for Professional Mobile Radio networks of different types. These transceivers are compatible with all types of mobile and portable radio communication devices, which use sub-tones (PL) or 5-tone Sel Call & ID (CCIR Rec. 257-1) controlling.
Significant reduction of the overall dimensions with high robustness maintained, make these devices suitable to operate in all conditions: on stationary site, on improvised (temporary) location or on the moving vehicle.
Main features:
• Verified radio solutions in Surface Mount Technology
• μC controlled, digital frequency synthesis (PLL)
• Two independent levels of output power
• Field programmable devices
• Choice of controlling method - PL or ID
• Built-in converter power supply
• Built-in battery charger
• Encrypted voice retranslation - without decryption (option)
RRS-600 series - Data sheet (766K)
(document in Serbian language)
• • • FIXED TRANSCEIVERS SRS-600D AND FRS-610-ID
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Full duplex fixed transceiver SRS-610D is primary designed to form Control Center in various Remote control and Data acquisition systems. The device is capable for continuous transmission of data, as well as voice information over narrow FM radio channel. Sophisticated technical solutions provide reliable operation even in severe exploitation conditions. Top performances of the transceiver are strongly proved through successful appliance in ASU-2000 - Automated System for Urban public transport control.
Main features:
• Data and voice transmission over FM radio channel
• Constant carrier (24/7) operation
• Transmitted and reflected power detection; efficient protection from high reflection on antenna connector
• Wide operating temperature range
• Highly stable frequency synthesizers
• Double serial communication RS-232 interface
• Remote controlling of the transmission parameters
• Service voice channel
Transceiver FRS-610D-ID is designed for specific purpose - to fulfill specific technical requirements comprised in System for urban public transport vehicles identification. The device is based on strongly verified RF blocks evaluated in mobile transceiver MRS-610D, which is applied in ASU-2000 - Automated system for complete control of transport resources. Sophisticated requirements had been solved by embedding of extremely powerful microcontroller, which replaces the original µC unit.
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Main features:
• Data transmission over UHF FM radio channel
• Fast and stable frequency synthesizers
• Extremely short transmitter "attack time"
• Built-in powerful µC and FFSK 1.2/2.4kb/s modem
• Double serial communication RS-232 interface
• Controlling of the transmission parameters over VDT
• Service voice channel
FRS-610-id - Data sheet (515K)