kenwood 248u manual

The Kenwood 248U is a professional two-way radio designed for commercial and industrial use, featuring UHF frequency range, 16 channels, programmable functions, robust construction, and reliable communication capabilities. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Accessories 7. Programming and Operation 8. Advanced Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: UHF transceiver, LCD display, programmable buttons, antenna, battery pack, charging cradle.

Feature	Description
Frequency Range	UHF 400-470MHz
Channels	16 programmable channels
Power Output	5W maximum
Battery	Li-ion rechargeable battery
Display	Backlit LCD with channel info
Programmable Buttons	2 side buttons for custom functions
Scan Function	Programmable channel scanning
VOX	Voice activated transmission
CTCSS/DCS	Tone squelch and digital codes
Water Resistance	IP54 rated for dust and water protection

Installation

Unpack and inspect contents. Install battery and antenna.

Install battery: Align battery with radio contacts, slide until it clicks.
Attach antenna: Screw antenna clockwise onto antenna connector.
Charge battery: Place radio in charging cradle until fully charged.
Install accessories: Connect speaker mic or headset if required.

WARNING! Use only Kenwood approved batteries and accessories. Do not use damaged batteries.

First-Time Setup

Power on radio; configure basic settings.

Power on: Rotate volume knob clockwise.
Select channel: Use channel selector knob.
Adjust volume: Rotate volume knob to desired level.
Program channels: Use programming software to set frequencies.
Set squelch: Adjust squelch level to minimize background noise.

CAUTION! Program radio only in authorized service areas. Unauthorized programming may violate regulations.

Specifications

Frequency Range: UHF 400-470MHz
Channels: 16 programmable
Power Output: 5W (High), 1W (Low)
Battery Life: Up to 10 hours typical use
Dimensions: 58mm(W) x 130mm(H) x 37mm(D)
Weight: 300g (with battery)
Operating Temp: -30°C to +60°C
Waterproof: IP54 rated
Modulation: 16KΦF3E / 11KΦF3E

Controls and Settings

Front Panel: Power/Volume knob, Channel selector, PTT button, Programmable buttons.

Display Indicators: Channel number, Battery level, Transmit indicator, Scan status.

Basic Settings: Volume control, Channel selection, Squelch level, Power on/off. Advanced Settings: CTCSS/DCS codes, Scan lists, Time-out timer, VOX sensitivity, Power save mode.

Connecting Accessories

Accessory port: For speaker mics, headsets, programming cables.

Turn off radio before connecting accessories.
Align accessory connector with radio port.
Push firmly until it clicks into place.
For programming: Connect programming cable to computer and radio.

Tip: Use only Kenwood approved accessories for optimal performance and safety.

Programming and Operation

Supports channel programming via PC software.

Install programming software on computer.
Connect radio to computer using programming cable.
Read current configuration from radio.
Program frequencies, CTCSS/DCS codes, and functions.
Write configuration to radio.
Verify programming by testing each channel.

WARNING! Only qualified personnel should program radios. Incorrect programming may cause interference.

Advanced Features

Scan Function: Monitor multiple channels. VOX: Hands-free operation. CTCSS/DCS: Private communication. Time-out Timer: Prevents extended transmissions. Power Save: Extends battery life.

Care & Maintenance

Clean with dry cloth only. Avoid solvents and abrasives. Store in dry place. Regularly check antenna and battery contacts.

CAUTION! Do not immerse in water. Avoid extreme temperatures and humidity.

Regulatory Information

FCC Part 90 certified for land mobile radio service. This device complies with part 15 of FCC rules. Operation subject to conditions: This device may not cause harmful interference and must accept any interference received. Copyright © Kenwood Corporation. For support, visit www.kenwood.com or contact authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Battery discharged or faulty	Charge battery; replace if necessary
Poor reception	Antenna loose or damaged	Tighten antenna; replace if damaged
No transmission	PTT button or settings	Check PTT function; verify channel programming
Battery drains quickly	Old battery or high power setting	Replace battery; use low power when possible
No audio	Volume setting or speaker	Adjust volume; check speaker connection

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

Service: Contact authorized Kenwood service center for repairs.