Kenwood TKR-751/TKR-851 VHF/UHF 25Watts

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.

WINDOWS® PROGRAMMING AND TUNING SOFTWARE

Windows® compatible PC programming and tuning provides easy setup and alignment using the optional KPG-91D software and KPG-46 programming interface cable. The most common tuning parameters* are adjustable without opening the unit or using tools. *Receiver helical resonator bandwidth, MCF waveform, and quadrature detector coil require manual tuning.

REPEATER FEATURES

• Full-Duplex Operation
• Built-in 16 QT/DQT Tone/
• Code Pair Community Repeater Operation
• External Controller Interface
• Conventional or Trunking Controller Compatible
• Courtesy Tone
• Repeat Enable/Disable
• 8 CW Transmitter IDs
• Repeat
• Hold Timer (hang timer)
• Time-Out-Timer

BASE STATION FEATURES

• 16 Channels
• Simplex or Full-Duplex Operation
• Antenna Switch for Simplex/Single Antenna Operation
• Priority Scan
• Remote Control Inputs
• 7-Segment 2-Character Channel & Scan LED Indicator
• 2-Character Alphanumeric Channel Designator
• Power/Transmit/Busy LED Indicators
• 6 Lighted PF Keys
• Local Takeover/Remote PF Key Channel up/Down PF Keys
• Volume Control Knob
• Front Microphone Jack
• Front Panel Speaker
• Voice
• Encryption Option Port
• Adjustable 1-25 W setting
• Continuous Transmit Duty (100% @ 1-25W)
• 19" Rack Mount Design
• Wide/Narrow Channel Spacing
• Primary DC Input Connector (AC-to-DC power supply optional)
• Auto- Switched Back-up DC Input Connector
• Backup Battery
Warning/Operation Tones
• Rear External Speaker Output (4 W Audio)
• Rear Accessory/Logic Controller Connector (25-Pin)
• Rear Test-Speaker-AUX Connector (15-Pin)
• Built-in Cooling Fan (temperature- or carrier-controlled)
• Programmable AUX Input /Output Functions
• BCD Remote Channel Selection (3 lines)
• Macro-Function AUX Inputs
• Selectable Toggle or Momentary Operation on AUX Input Ports
• DTMF/5- tone Over-the-Air Remote Function & Auxiliary Output Control
• Pre-Emphasis On/Off Control (at TA AUX Input)
• External PTT Input at Power On
• DSP-Processed QT/DQT
• DSP-Processed Companded Audio (simplex base operation)
• QT/DQT Squelch-Tail Elimination
• Beep Function for Control,Warning, Alert & Power On Tones
• Electronic Serial Number (ESN)
• Embedded Message with Password Protection
• High-Stability Oscillators (TCXO)
• Windows® 98/2000/Me/XP compatible PC programming & tuning
• Flash Memory

Frequency Range: VHF: 146-174 MHz; UHF: 440-470 MHz

Memory Channels: 16

Dimensions: 88mm x 483mm x 340mm (H x W x D)

Weight: 9.7kg

Download PDF Data Sheet:
Kenwood-TKR-751-TKR-851-VHF-UHF-25Watts-100142.pdf (557.58 KB)

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Manufacturer: Kenwood

Total solutions in the Commercial and Amateur Radio Communications markets. Kenwood will work to further integrate audio and radio communications, which are our core competencies.

Category: Base Station

Class: UK Product