1. Introduction
Thank you for choosing the LUITON LT-590 Mobile Radio. This high-performance dual-band transceiver is designed for reliable communication across a wide range of applications, offering robust features and a user-friendly interface. This manual provides essential information for the proper installation, operation, and maintenance of your LT-590 radio.
Figure 1: LUITON LT-590 Mobile Radio Unit
2. Package Contents
Please check the package carefully to ensure all items are present:
- LUITON LT-590 Mobile Radio Unit
- Handheld Microphone
- Mounting Bracket
- DC Power Cable
- Screw Set for mounting
- User's Manual
Figure 2: Included Accessories
3. Product Overview
3.1. Dimensions
Figure 3: Product Dimensions (approx. 145mm x 190mm x 47mm for main unit)
3.2. Front Panel Controls and Microphone
Figure 4: Front Panel and Microphone Controls
- Main Dial: For channel or frequency selection.
- V/M/MW Button: Switches between VFO (Frequency) mode, Memory (Channel) mode, and Memory Write.
- SHIFT/MHz Button: Adjusts frequency step or activates shift function.
- TS/DCS/LOCK Button: Toggles CTCSS/DCS settings or locks the keypad.
- FUN/SET Button: Accesses the function menu.
- CAL/H/L Button: Calibration or High/Low power selection.
- SQL/D Button: Squelch level adjustment or Dual Watch function.
- PTT (Push-To-Talk) Button: On the microphone, for transmitting.
- Number Keypad: On the microphone, for direct frequency entry and function access.
- Volume Knob: Adjusts audio output level.
- PWR Button: Power On/Off.
- Data Terminal: For programming or data connection.
3.3. Rear Panel Connections
Figure 5: Rear Panel Connections
- Antenna Connector: Connects to your external antenna.
- DC Power Input: Connects to the supplied DC power cable.
4. Specifications
| Category | Specification | Value |
|---|---|---|
| General | Frequency Range | 136-174/245-246/400-490MHz |
| Channel Capacity | 200 channels | |
| Channel Spacing | 5/6.25/8.33/10/12.5/15/20/25/30/50KHz | |
| Frequency Stability | 2.5ppm | |
| Operating Temperature | -20°C ~ +60°C | |
| Operating Voltage | 13.8V DC ± 15% | |
| Dimension (HxWxD) | 145mm x 190mm x 47mm | |
| Weight (with bracket) | 1200g | |
| Receiver | Reference Sensitivity | 0.25V / 0.35V |
| Operating Bandwidth | 60dB@ 12.5KHz / 70dB@ 25KHz | |
| Adjacent Channel Selectivity | 60dB@ 12.5KHz / 70dB@ 25KHz | |
| Inter-modulation Rejection | ≥60dB / ≥65dB | |
| Spurious Response Rejection | ≥70dB | |
| Rated Audio Response | +1 - +3dB | |
| Rated Audio Distortion | <5% | |
| FM Hum & Noise | ≥40dB@25KHz / ≥45KHz @ 12.5KHz | |
| Transmitter | RF Power | 45W/25W/10W (UHF) / 60W/25W/10W (VHF) |
| Frequency Modulation | 11kΦF3E / 16kΦF3E | |
| Modulation Distortion | <5% | |
| FM Noise | ≥36dB@ 25KHz / ≥40KHz @ 12.5KHz | |
| Adjacent Channel Power | ≥60dB@ 12.5KHz / ≥70KHz @ 25KHz | |
| Audio Response | +1 - +3dB | |
| Audio Distortion | <5% |
5. Setup and Installation
5.1. Mounting the Radio
Use the provided mounting bracket and screws to securely install the radio in your vehicle or desired location. Ensure the mounting surface is stable and can support the weight of the radio.
5.2. Antenna Connection
Connect a suitable VHF/UHF antenna to the antenna connector on the rear panel of the radio. Ensure the connection is tight to prevent signal loss and damage.
5.3. Power Connection
Connect the supplied DC power cable to the power input on the rear of the radio. Connect the other end of the power cable to a 13.8V DC power source, ensuring correct polarity (red to positive, black to negative). The radio requires a stable power supply within ±15% of 13.8V DC.
Figure 6: Power and Antenna Connections (rear view)
Caution: Incorrect power connection can damage the radio. Always verify polarity before connecting to a power source.
6. Operating Instructions
6.1. Power On/Off
Press the PWR button on the front panel to turn the radio on or off.
6.2. Volume Adjustment
Rotate the VOL knob clockwise to increase volume and counter-clockwise to decrease it.
6.3. Frequency/Channel Selection
- VFO Mode (Frequency Mode): Press V/M/MW to enter VFO mode. Use the Main Dial to tune the frequency. You can also use the number keypad on the microphone for direct frequency input.
- Memory Mode (Channel Mode): Press V/M/MW to enter Memory mode. Use the Main Dial to select a stored channel.
6.4. Squelch Level Adjustment
Press the SQL/D button and use the Main Dial to adjust the squelch level (0-9). A higher number requires a stronger signal to open the squelch.
6.5. Transmitting (PTT)
To transmit, press and hold the PTT button on the microphone and speak into the microphone. Release the PTT button to receive.
6.6. High/Mid/Low Power Selection
Press the CAL/H/L button to cycle through High, Mid, and Low power output settings.
6.7. Scanning
The radio supports Frequency/Channel scanning. Refer to the full user manual for detailed instructions on activating and configuring scanning functions.
6.8. CTCSS/DCS Tones
Press the TS/DCS/LOCK button to access CTCSS/DCS settings for private communication or repeater access. Use the Main Dial or microphone keypad to select the desired tone/code.
7. Key Features
- Dual Band Operation: VHF (136-174MHz) and UHF (400-480MHz)
- High Power Output: Up to 60W on VHF, 45W on UHF
- 200 Memory Channels
- Multiple Channel Spacing Options: 5/6.25/8.33/10/12.5/15/20/25/30/50KHz
- CTCSS/DCS Encoding and Decoding
- DTMF/2 Tone/5 Tone Signaling
- ANI ID Functionality
- Remote Kill/Stun/Activate/Revive Capabilities
- Emergency Alarm
- Wide/Narrow Bandwidth Setting
- Busy Channel Lock-Out (BCLO)
- Voice Compander for enhanced audio clarity
- Repeater Offset Shift
- Keypad Lock Function
- Contact Book for easy access to contacts
- Battery Voltage Display
- Time-out Timer (TOT)
- Auto Power Off
- Voice Prompt (Optional)
- Scrambler Function (Optional)
8. Maintenance and Care
- Cleaning: Use a soft, damp cloth to clean the radio's exterior. Do not use harsh chemicals or solvents.
- Antenna: Regularly check the antenna connection for tightness and ensure the antenna is in good condition.
- Power Cable: Inspect the power cable for any signs of damage or wear.
- Operating Environment: Avoid exposing the radio to extreme temperatures, direct sunlight for prolonged periods, dust, or moisture.
- Servicing: Do not attempt to open or repair the radio yourself. Refer all servicing to qualified technicians.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cable disconnected or faulty; incorrect voltage; blown fuse. | Check power cable connections and polarity. Verify power source voltage. Check inline fuse. |
| Cannot transmit or receive | Antenna not connected; incorrect frequency/channel; squelch too high; TX inhibit active. | Ensure antenna is connected. Verify frequency/channel. Adjust squelch level. Check TX inhibit setting. |
| Poor audio quality | Low signal strength; incorrect squelch; microphone issue. | Check antenna and signal strength. Adjust squelch. Test with another microphone if possible. |
| Keypad locked | Keypad lock function activated. | Press and hold the TS/DCS/LOCK button to unlock. |
10. User Tips
- For optimal range, ensure your antenna is mounted as high and clear as possible.
- Regularly check your local regulations regarding radio frequency usage to ensure compliance.
- Experiment with different squelch levels to find the best balance between noise suppression and receiving weak signals.
- Utilize the memory channels to quickly access frequently used frequencies.
11. Warranty and Support
The LUITON LT-590 Mobile Radio comes with a one-year warranty from the date of purchase, covering manufacturing defects. This warranty does not cover damage caused by human error or misuse. For warranty claims or technical support, please contact your dealer or LUITON customer service.
Specific components have shorter warranty periods:
- Batteries & Chargers: 6 months
- Antennas, Earphones, etc.: 3 months
In case of a problem, LUITON may offer free components and diagrams for self-service. If a return for repair is necessary, 50% of the shipping cost will be borne by the customer.
