TKR-751E Analogue Base Station/Repeater (EU Use)

VHF Repeater - Low Power

Repeater operation 
The TKR-751/851 is “community repeater-ready” with the internal 16 QT/DQT group controller and programmable repeater functions such as 5-Tone access codes, CW Transmitter ID, Hang-Timer, Time-Out-Timer and Repeat Enable/Disable Key. The 1W-to-25W adjustable power output is ideal for on-site, exciter or repeater applications. (DC power supply not included.

Conventional or trunking system use
The TKR-751/851 can serve as the core element of any conventional or trunking repeater system. The basic internal conventional controller can be bypassed and an external conventional or trunking logic controller unit can be easily interfaced for advanced systems.

Simplex or duplex base station operation
The TKR-751/851 can be operated in simplex or fullduplex base station mode with up to 16 channels and priority scan. Internal solid state antenna switching is provided for simplex single-antenna base station operation (requires internal modifications; see service manual). The accessory connectors provide DC or tone remote control interface. Also programmable are the six PF function keys, LED indicators, volume knob, local speaker, control/warning/alert/power-on tones and tone volume for facilitating any local, equipment room or remote site installation.

5-Tone selective call, repeater open/close
The built-in 5-Tone encoder/decoder (up to 3-frame) is compatible with a wide range of European protocols – EEA, EIA, CCIR, ZVEI, ZVEI-2, as well as the Kenwood tone format – while allowing detailed adjustment of parameters. There is also a 5-Tone decode function to open or close the repeater; this can be used in conjunction with QT/DQT. 

5-Tone/DTMF Over-the-AIR Remote Control
All front panel PF Key functions and AUX Input functions can be remotely activated and deactivated over-the-air via 5-Tone or DTMF codes and provide an acknowledgement single tone or custom 5-Tone/DTMF transpond code. Also AUX outputs, upon activation and deactivation will encode unique 5-Tone/DTMF codes for monitoring and alarm purposes (examples: COR, fan status, low DC power supply, RF power down, PLL unlock, TOR and TX sense). For external analogue sensor and switch sensing, AUX inputs not assigned a programmable function can encode unique active and inactive 5-Tone/DTMF codes (examples: air conditioning failure, open door/gate). 

LED display & indicators
The enhanced 7-segment/2-character front panel LED provides a high-visibility 2-character alphanumeric channel designator and scan indicator for base station operation, a PLL unlock indicator and a PC program mode status for both base and repeater modes. Front panel dual-colour LED’s provide Transmit, Busy, Primary/ Backup DC Power indications. 

Backup power features
The Backup Battery Warning Tone transmits an overthe-air 5-second tone after DC supply has switched from “main” to “backup” power. Optionally a reminder Operation Tone can be transmitted while on backup power. These tones can be triggered when either DC power is connected to the backup DC input line or when the supplied voltage is lower than the programmed Power Supply Level DC voltage setting.

• Frequency Range: 146-174 MHz
• 16 Full-Duplex Channels & Single Priority Scan
• Variable RF Output - 1 W to 25 W
• Windows Programming & Tuning Software

• External Control I/O via D-Sub Connector
• Battery Back-Up System
• Flash Memory For Firmware/System Upgrades
• Durable Die-Cast Chassis Construction