1. Introduction
The Radtel RT-493 is a professional 10W UHF two-way radio designed for business and outdoor use. Featuring an IP67 waterproof rating, a hidden LCD display, and a 2600mAh USB-C rechargeable battery, it offers robust communication in various environments. This manual provides essential information for the safe and efficient operation of your RT-493 radio.
2. Package Contents
Please check the package carefully to ensure all items are present:
- Main Radio Body ×1
- 2600mAh Li-ion Battery (with USB-C Port) ×1
- Antenna ×1
- Belt Clip ×1
- Charger Base ×1
- Charging Cable ×1
- Power Adapter (Bull Head) ×1
- User Manual ×1
3. Product Overview
Familiarize yourself with the main components and controls of your Radtel RT-493 radio:
- Antenna: For transmitting and receiving signals.
- Channel Knob: Used to select communication channels.
- Power Switch / Volume Knob: Turns the radio on/off and adjusts the volume.
- Status Indicator Light: Provides visual feedback on radio status (e.g., transmitting, receiving, charging).
- Horn: Speaker for audio output.
- Earphone Jack: For connecting an external earphone or headset.
- PTT Launch Key (Push-to-Talk): Press and hold to transmit, release to receive.
- Side Key 1: Programmable function key.
- Side Key 2: Programmable function key.
- On-screen Display: Hidden LCD display showing channel, battery level, and TX/RX status.
4. Setup and Charging
4.1 Battery Installation
- Align the battery pack with the grooves on the back of the radio.
- Slide the battery pack upwards until it clicks into place.
- To remove, press the battery release latch (if present) and slide the battery downwards.
4.2 Antenna Attachment
- Screw the antenna clockwise into the connector on the top of the radio until it is firmly seated.
- Do not overtighten.
4.3 Charging the Battery
The RT-493 features a 2600mAh Li-ion battery with a USB-C port, allowing for flexible charging options:
- Using the Charger Base: Place the radio with the battery attached into the charger base. Ensure the charging contacts align. The status indicator light will show charging status.
- Direct USB-C Charging: Connect a USB-C cable directly to the USB-C port on the battery pack. You can charge using a power adapter, computer, power bank, or car charger.
5. Operating Instructions
5.1 Power On/Off and Volume Adjustment
Rotate the Power Switch/Volume Knob clockwise to turn the radio ON. Continue rotating to increase the volume. Rotate counter-clockwise to decrease volume and turn OFF the radio.
5.2 Channel Selection
Rotate the Channel Knob to select the desired communication channel (1-199). The selected channel number will be shown on the hidden LCD display.
5.3 Transmitting and Receiving
- To Transmit: Press and hold the PTT (Push-to-Talk) key. Speak clearly into the microphone. The TX indicator will light up.
- To Receive: Release the PTT key. The RX indicator will light up when receiving a signal.
5.4 One-Key Frequency Copy
The RT-493 supports one-key frequency copying, allowing for quick setup with other radios:
- Place the RT-493 and the target radio within 1 meter distance.
- Activate the one-key copy function on the RT-493 (refer to specific key assignment in your radio's programming software if not default).
- The radio will quickly copy the frequency and CTCSS/DCS codes from the other radio, enabling immediate communication without manual programming.
5.5 VOX Function (Voice Operated Transmit)
To activate the VOX function, press and hold both the PTT key and Side Key 2 for approximately 3 seconds while powering on the radio. This allows for hands-free transmission when your voice is detected.
5.6 Scanning and Alarm Voice
- Scanning: Briefly press Side Key 2 to activate the scanning function. The radio will scan through active channels.
- Alarm Voice: A long press of Side Key 2 triggers an alarm voice.
5.7 Other Functions
- High/Low Power Switch: Allows you to select between high (10W) and low output power to conserve battery or extend range.
- Encryption, Scrambler, and Companding: These features enhance communication privacy and audio clarity.
- Frequency Hopping: Utilizes smart chip technology to prevent crosstalk and ensure confidential communication.
- CTCSS/DCS: Continuous Tone-Coded Squelch System / Digital Coded Squelch for filtering unwanted signals.
- TOT (Time-Out Timer): Prevents a user from transmitting for too long on a channel.
- Battery Save: Automatically reduces power consumption when no signal is being received and no operations are being performed.
- Low Power Alert: Notifies the user when the battery level is critically low.
6. Maintenance
6.1 General Care
- Clean the radio with a soft, damp cloth. Do not use harsh chemicals or solvents.
- Keep the radio dry. If it gets wet, wipe it thoroughly.
- Avoid exposing the radio to extreme temperatures or direct sunlight for prolonged periods.
6.2 IP67 Waterproof Rating
The Radtel RT-493 is IP67 rated, meaning it is dust-tight and protected against immersion in water up to 1 meter for 30 minutes. This makes it suitable for use in marine environments or other wet conditions.
Important: While waterproof, ensure all covers (e.g., earphone jack cover) are securely closed before exposing the radio to water. The radio is designed to withstand water immersion but is not designed to float.
6.3 Battery Care
- Charge the battery fully before first use.
- Avoid completely draining the battery regularly to prolong its lifespan.
- Store the battery in a cool, dry place when not in use.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Radio does not power on | Battery is low or not installed correctly. | Charge the battery or re-install it securely. |
| Cannot transmit or receive | Incorrect channel selected, out of range, or antenna not properly attached. | Verify channel, move closer to other radios, check antenna connection. |
| Poor audio quality | Low battery, interference, or incorrect CTCSS/DCS settings. | Charge battery, move away from interference sources, check CTCSS/DCS. |
| Radio is wet after exposure to water | Port covers were not sealed properly. | Ensure all port covers are securely closed before water exposure. Dry thoroughly. |
8. Specifications
| Feature | Specification |
|---|---|
| Model Name | RT-493 |
| Output Power | 10W |
| Battery Capacity | 2600mAh (USB-C) |
| Rated Voltage | 7.4V |
| Product Weight | 281g |
| Storage Channels | 199 |
| Frequency Range | 400-470Mhz |
| Dimensions (W*H*D) | 62*310*40mm (with antenna) |
| Waterproof / Water-Resistant | IP67 |
| Material | Plastic |
| Display | Hidden LCD (No) |
| Maximum Range | 5km-10km |
| Use | Business Two Way Radio |
9. User Tips
- Waterproof Confidence: The IP67 rating makes this radio excellent for marine or outdoor use. Just remember to secure all port covers before exposing it to water.
- Quick Setup: Utilize the 'One-key frequency copy' feature to quickly synchronize your radio with other compatible devices, saving time on manual programming.
- Hidden Display Advantage: The hidden LCD display contributes to the radio's ruggedness and prevents scratches, making it ideal for demanding environments.
- Frequency Hopping: The genuine frequency hopping encryption ensures more secure and anti-crosstalk communication.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact the Radtel Official Store or your authorized dealer. Keep your purchase receipt as proof of purchase.
