Kenwood TKR 850 Manual

The Kenwood TKR 850 is a professional-grade VHF/UHF repeater system designed for reliable communication in various environments. This digital repeater features advanced signal processing, multiple channel capability, robust construction, and flexible configuration options suitable for commercial, public safety, and industrial applications. Below are key sections covering safety, features, installation, programming, operation, and maintenance.

1. Features at a Glance 2. Installation 3. Initial Setup 4. Specifications 5. Controls and Indicators 6. Programming and Configuration 7. Operation Modes 8. Maintenance 9. Regulatory Compliance 10. Troubleshooting

Features at a Glance

Key components: Main repeater unit, Control head, Power supply unit, Antenna system, Programming interface.

Feature	Description
Frequency Range	VHF: 136-174 MHz / UHF: 400-470 MHz
Channel Capacity	Up to 256 channels programmable
Power Output	Adjustable up to 50W (VHF) / 40W (UHF)
Digital Capability	Supports analog and digital modes
Duplex Operation	Full duplex with isolation protection
Control Head	LCD display with programmable buttons
Power Input	13.8V DC nominal
Programming Interface	USB and RS-232 compatible
Temperature Range	-30°C to +60°C operating
Mounting Options	Rack mount and desktop configurations

Installation

Unpack and inspect all components. Choose appropriate location for installation.

Mount repeater unit: Secure in rack or stable surface using provided hardware.
Connect antenna system: Use low-loss coaxial cable; ensure proper grounding.
Connect power supply: Use appropriate gauge wiring for 13.8V DC input.
Install control head: Mount in accessible location; connect control cable.
Connect programming interface: For initial configuration and programming.

WARNING! Ensure proper ventilation and grounding. Use lightning protection for antenna systems.

Initial Setup

Power on system; follow programming sequence for basic configuration.

Connect programming cable: Use USB or RS-232 interface with programming software.
Load basic parameters: Set frequency pairs, CTCSS/DCS codes, time-out timer.
Configure channels: Program desired channels with appropriate settings.
Set power levels: Adjust transmit power for optimal coverage.
Test operation: Verify repeater function with test equipment.

CAUTION! Ensure proper licensing for operating frequencies. Verify all connections before applying power.

Specifications

Frequency Stability: ±1.0 ppm
Modulation: 16KΦF3E (FM)
Spurious Emission: -60 dB or better
Audio Output: 2W internal speaker
Current Consumption: Approx. 15A at maximum power
Dimensions: 132(W) × 45(H) × 270(D) mm
Weight: Approx. 3.5 kg
Interface: USB, RS-232, external speaker, COR
Operating System: Compatible with KPG-95D programming software
Warranty: 3 years limited warranty

Controls and Indicators

Front Panel: POWER switch, STATUS indicators, FUNCTION button. Control Head: LCD display, Channel selector, Volume control, Programmable keys.

Status Indicators: POWER (green), TX (red), RX (green), ALARM (orange). LCD Display: Channel number, frequency, mode indicator, signal strength.

Programming Buttons: [F] function key, [VOL] volume control, [SQL] squelch control, [CH] channel selector. Remote Control: Available for remote monitoring and control functions.

Programming and Configuration

Use KPG-95D programming software for comprehensive configuration.

Connect programming cable to PC and repeater unit.
Launch KPG-95D software and establish communication.
Read current data from repeater or create new configuration.
Set basic parameters: Frequency pairs, offset, power levels.
Configure advanced features: DTMF, ANI, linking, voting.
Write configuration to repeater and verify operation.

Tip: Backup configuration files regularly. Test all programmed features thoroughly.

Operation Modes

Supports multiple operating modes for flexible deployment.

Standard Repeater: Full duplex operation with carrier control.
Talk-around: Direct communication without repeater.
Cross-band: VHF to UHF or UHF to VHF repeating.
Link Mode: Interconnect with other repeaters or systems.
Voting: Multiple receiver voting for improved coverage.
Digital Operation: DMR capability with appropriate licensing.
Emergency Mode: Priority channel operation.
Remote Control: Operation via telephone or network interface.

WARNING! Ensure proper mode selection for intended use. Verify licensing requirements for digital operation.

Maintenance

Regular maintenance ensures optimal performance and longevity.

Monthly: Check antenna connections, clean exterior, verify power connections. Quarterly: Check RF power output, measure frequency accuracy, verify receiver sensitivity. Annual: Complete performance testing, internal cleaning, firmware updates.

CAUTION! Disconnect power before performing internal maintenance. Use only authorized service personnel for repairs.

Regulatory Compliance

FCC Part 90: Certified for land mobile radio service. Complies with relevant ETSI standards for European markets. Industry Canada RSS-119 approved. Manufacturer: Kenwood Communications. For technical support, visit www.kenwood.com/usa or contact 1-800-950-5005.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power connection/fuse	Check DC power connection; verify fuse; check voltage.
No transmission	Settings/antenna	Verify TX enabled; check antenna system; measure SWR.
Poor reception	Antenna/settings	Check antenna connections; adjust squelch; verify frequency.
Control head issues	Cable/software	Check control cable; reset control head; update firmware.
Overheating	Ventilation/power	Ensure adequate ventilation; reduce power if necessary.

Reset: Power cycle unit; factory reset via programming software if required.

Service: 1-800-950-5005; www.kenwood.com/usa