Kenwood TH 22AT User Manual

The Kenwood TH 22AT is a compact 2-meter band FM transceiver featuring 5 watts output power, 200 memory channels, CTCSS/DCS encode and decode, wide frequency coverage from 136-174 MHz, built-in VOX function, battery saver function, and rugged construction. Ideal for amateur radio operations with easy-to-use controls and reliable performance. 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. Operating Modes 8. Memory Functions 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Main unit with LCD display, antenna, battery pack, belt clip, AC adapter, and user manual.

Feature	Description
Frequency Range	136-174 MHz (Rx/Tx)
Output Power	5W/1W selectable
Memory Channels	200 channels
CTCSS/DCS	Encode and decode functions
VOX Function	Voice-operated transmission
Battery Saver	Extended battery life
LCD Display	Backlit with frequency/channel info
Scan Functions	Programmable scan and memory scan
Power Source	7.2V Ni-MH battery pack
Dimensions	58(W) x 110(H) x 32(D) mm

Installation

Unpack and inspect all components. Ensure battery is fully charged before first use.

Install battery: Align battery pack with unit and slide into place until it clicks.
Attach antenna: Screw antenna clockwise onto antenna connector.
Charge battery: Connect AC adapter to unit and wall outlet for 6-8 hours.
Attach belt clip: Secure belt clip to rear of unit if desired.

WARNING! Do not transmit without antenna attached. Ensure proper charging to maintain battery health.

First-Time Setup

Power on unit; initialize settings for first use.

Set frequency: Use keypad to enter desired frequency (146.520 MHz recommended for amateur use).
Configure CTCSS/DCS: Access TONE menu to set encode/decode tones if needed.
Program memory channels: Store frequently used frequencies in memory locations.
Adjust squelch: Set squelch level to eliminate background noise.
Configure VOX: Set VOX sensitivity if using hands-free operation.

CAUTION! Ensure you have proper amateur radio license before transmitting.

Specifications

Frequency Range: 136-174 MHz (Rx/Tx)
Output Power: 5W (High), 1W (Low) selectable
Modulation: 16KΦF3E (FM)
Antenna Impedance: 50 ohms
Power Supply: 7.2V DC (Ni-MH battery pack)
Current Drain: 1.2A max (TX), 150mA (RX), 20mA (standby)
Operating Temp: -10°C to +60°C
Dimensions: 58 x 110 x 32 mm
Weight: Approx. 280g (with battery)

Controls and Settings

Front Panel: POWER/VOL knob, SQL knob, CHANNEL selector, FUNCTION button, MIC jack, PTT button.

Key Functions: POWER/VOL (power on/off and volume control), SQL (squelch control), FUNCTION (access secondary functions), PTT (push-to-talk).

Menu Settings: TONE (CTCSS/DCS setup), SCAN (scan configuration), VOX (voice-operated transmit), LAMP (backlight control), SAVE (battery saver), SHIFT (repeater offset), REV (reverse function).

Connecting Accessories

External Speaker/Mic: Use 3.5mm jack on side panel. Headset: Connect to MIC/SP jack for VOX operation.

Turn off unit before connecting accessories.
Match connector types (3.5mm for audio accessories).
Ensure proper seating of connectors.
Test accessory function before operation.

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

Operating Modes

Supports simplex and repeater operations.

Simplex Operation: Direct unit-to-unit communication on same frequency.
Repeater Operation: Set offset frequency (+/- 600 kHz typical) for repeater use.
Memory Mode: Recall stored frequencies from memory channels.
Scan Mode: Monitor multiple frequencies or memory channels.
VOX Mode: Hands-free operation using voice activation.
Tone Operation: Use CTCSS/DCS for private communications.

WARNING! Observe proper radio etiquette and FCC regulations during operation.

Memory Functions

Store up to 200 frequencies with tone settings.

Store Memory: Tune to desired frequency, press FUNCTION + MR to store.
Recall Memory: Press MR and use channel selector or keypad.
Memory Scan: Press SCAN to scan through programmed memory channels.
Memory Lock: Lock important channels to prevent accidental changes.
Memory Name: Assign alphanumeric names to memory channels.

Care & Maintenance

Keep unit clean and dry. Use soft cloth for cleaning; avoid chemicals.

Battery Care: Charge fully before first use. Avoid complete discharge. Store in cool, dry place.

CAUTION! Do not expose to extreme temperatures or moisture. Use only approved chargers.

Regulatory Information

FCC Part 15 and Part 97 compliant. This device complies with part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. Amateur radio service requires proper FCC license. Copyright © Kenwood Corporation. For support, visit www.kenwood.com or contact authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Battery/connections	Charge battery; check connections; ensure power switch on.
No transmission	PTT/antenna	Check PTT function; ensure antenna properly connected.
Poor reception	Squelch/antenna	Adjust squelch; check antenna connection; move to better location.
Battery drains quickly	Battery age/settings	Replace battery; enable battery saver function; reduce backlight time.
Memory lost	Battery removal	Re-program memory; ensure battery maintained during replacement.

Reset: FUNCTION + POWER to reset all settings to factory default.

Service: Contact authorized Kenwood service center for repairs.