Kenwood TKR 820 Manual

The Kenwood TKR 820 is a professional VHF/UHF repeater system designed for commercial and public safety applications. This robust repeater features wide frequency coverage, high power output, advanced signaling capabilities, and reliable performance in demanding environments. Below are key sections covering safety, features, installation, programming, operation, maintenance, and troubleshooting.

Features at a Glance

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

Installation

Unpack and inspect all components. Select appropriate location with proper ventilation.

1. Mount repeater: Install in 19-inch rack using provided hardware.
2. Connect antenna: Use low-loss coaxial cable with N-type connectors.
3. Connect power: Use appropriate gauge wire for 13.8V DC connection.
4. Connect control head: Attach control cable to main unit.
5. Grounding: Ensure proper grounding for lightning protection.

WARNING! High voltage present inside unit. Only qualified personnel should perform installation.

Initial Setup

Power on repeater; configure basic settings via control head or programming software.

1. Power connection: Connect to stable 13.8V DC power source.
2. Frequency programming: Set transmit and receive frequencies.
3. CTCSS/DCS: Program tone squelch if required.
4. Power level: Set appropriate output power for application.
5. Time-out timer: Configure transmission time limit.

CAUTION! Ensure proper ventilation and adequate clearance around unit.

Specifications

• Frequency Range: VHF 136-174 MHz / UHF 400-470 MHz
• Output Power: VHF: 5-50W, UHF: 5-40W
• Channel Capacity: 256 channels
• Modulation: 16KΦF3E / 11KΦF3E
• Spurious: -60 dB or better
• Audio Output: 2W internal speaker
• Power Requirements: 13.8V DC ±15%
• Current Consumption: Approx. 16A (max power)
• Operating Temperature: -30°C to +60°C
• Dimensions: 132(W) × 44(H) × 270(D) mm

Controls and Indicators

Front Panel: POWER switch, SQL knob, VOLUME knob, MONI button, indicators.

Control Head: LCD display, Function keys, Channel selector, PTT, Volume control.

Indicators: Power LED (green), TX LED (red), Busy LED (orange), Alarm LED (red). Display shows channel number, frequency, status messages, and menu options.

Programming

Use KPG-89D programming software and programming cable.

1. Install software on Windows PC.
2. Connect programming cable to repeater and PC.
3. Read current data from repeater.
4. Program frequencies, tones, and features.
5. Write data to repeater and verify.

Tip: Always backup current programming before making changes.

Operation

Standard repeater operation with various operating modes.

1. Power on: Turn POWER switch to ON position.
2. Channel selection: Use channel selector knob.
3. Volume adjustment: Set appropriate listening level.
4. Squelch adjustment: Set to minimum level that eliminates noise.
5. Monitor: Press MONI to open squelch and listen for weak signals.
6. Transmit indicator: TX LED illuminates during transmission.

WARNING! Operate only with authorized frequencies and licenses.

Maintenance

Regular maintenance ensures optimal performance and longevity.

1. Monthly: Clean exterior, check connections, verify operation.
2. Quarterly: Check antenna system, inspect cables.
3. Annually: Professional inspection and alignment.
4. Cooling system: Ensure fan operates properly.

CAUTION! Disconnect power before performing any maintenance.

Regulatory Information

FCC Part 90: Certified for land mobile radio service. This device complies with Part 15 of FCC rules. Operation subject to condition that device does not cause harmful interference. For professional use only. Proper licensing required for operation. Copyright © Kenwood Corporation. For support, contact authorized Kenwood service centers.

Troubleshooting

Reset: Use programming software to reset to factory defaults if needed.

Service: Contact authorized Kenwood service center for repairs.