Introduction
This manual provides essential information for the safe and effective operation of your Standard Horizon HX400 Handheld VHF Marine Radio. Please read these instructions thoroughly before using the radio and keep this manual for future reference. The HX400 is designed for reliable marine communication, featuring a robust, submersible design and advanced capabilities.
Figure 1: Standard Horizon HX400 Handheld VHF Marine Radio
Safety Information
Observe the following precautions to prevent fire, injury, or damage to the radio:
- Do not operate the radio in explosive atmospheres.
- Avoid exposing the radio to direct sunlight for extended periods.
- Ensure the battery pack is securely attached before submerging the radio.
- Use only approved Standard Horizon accessories.
- Do not attempt to open or modify the radio; this will void the warranty and may cause damage.
Package Contents
Verify that your package contains the following items:
- Standard Horizon HX400 Handheld VHF Marine Radio
- SBR-29LI Lithium-Ion Battery Pack
- Antenna
- AC Charger
- Charging Cradle
- Belt Clip
- Owner's Manual (this document)
Figure 2: HX400 radio and standard accessories
Product Overview
The HX400 features a clear display and intuitive controls for ease of use in marine environments.
Controls and Display
Familiarize yourself with the radio's buttons and display for efficient operation.
Figure 3: Close-up of the HX400 display
Figure 4: Detailed view of the HX400 control buttons
Figure 5: Side view showing the Push-To-Talk (PTT) button
Setup
1. Battery Installation
- Align the SBR-29LI battery pack with the battery compartment on the back of the radio.
- Slide the battery pack into place until it clicks securely.
- Ensure the battery latch is fully engaged to maintain water resistance.
2. Charging the Battery
Before first use, fully charge the battery for optimal performance.
- Connect the AC charger to the charging cradle.
- Place the HX400 radio into the charging cradle. The charging indicator light will illuminate.
- A full charge typically takes several hours. The indicator light will change or turn off when charging is complete.
Figure 6: HX400 radio placed in its charging cradle
3. Antenna Attachment
- Screw the antenna clockwise onto the antenna connector on top of the radio until finger-tight. Do not overtighten.
Operating Instructions
1. Power On/Off
- To turn on: Press and hold the PWR button until the display illuminates.
- To turn off: Press and hold the PWR button until the display turns off.
2. Volume Adjustment
Rotate the volume knob located on the top of the radio clockwise to increase volume and counter-clockwise to decrease volume.
3. Channel Selection
- Use the UP/DOWN arrow buttons to change channels.
- Press the 16/S button to instantly recall Channel 16 (Distress Channel) or the last selected calling channel. Press again to return to the previous working channel.
4. Transmitting and Receiving
- To transmit: Press and hold the PTT (Push-To-Talk) button on the side of the radio. Speak clearly into the microphone.
- To receive: Release the PTT button. The radio will automatically switch to receive mode.
5. Programmable Channels (LMR & Scrambler)
The HX400 supports Land Mobile Radio (LMR) channels and features a built-in voice scrambler. These functions require specific programming using optional software and cables. Refer to the detailed programming guide available from Standard Horizon for configuration instructions.
6. NOAA Weather Channels
The radio can access NOAA Weather Channels for important weather alerts. Consult the full manual for specific instructions on how to scan and select weather channels.
Figure 7: Standard Horizon handheld radios, including the HX400, featuring NOAA weather alerts
Maintenance
1. Cleaning
- Wipe the radio with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- After exposure to saltwater, rinse the radio thoroughly with fresh water and dry completely.
2. Battery Care
- Avoid fully discharging the battery frequently.
- Store the radio with a partially charged battery if not used for extended periods.
- Replace the battery when its operating time significantly decreases.
3. Water Resistance
The HX400 is designed to be submersible. Ensure the battery pack is correctly installed and the antenna is securely attached to maintain its water resistance rating.
Figure 8: The HX400 is designed for submersible use
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Radio does not power on | Dead battery; improperly installed battery | Charge battery; re-install battery correctly |
| No audio or low volume | Volume too low; squelch set too high | Increase volume; adjust squelch level |
| Cannot transmit | PTT button not pressed; incorrect channel selected | Press PTT firmly; select a valid transmit channel |
| Poor reception | Loose antenna; interference; low battery | Check antenna connection; move away from interference sources; charge battery |
Specifications
- Model: HX400
- Product Dimensions: 9 x 3 x 6 inches
- Item Weight: 2 pounds
- Batteries: 1 Lithium Ion battery (included)
- Number of Channels: 8 (VHF Marine, LMR programmable)
- Frequency Range: 134 - 174 MHz
- Talking Range Maximum: 36 Mile (line of sight dependent)
- Voltage: 3.7 Volts
- Water Resistance Level: Submersible (IPX7/IPX8 equivalent)
- Special Features: Built-in Scrambler, NOAA Weather Channels
Warranty Information
The Standard Horizon HX400 is covered by a manufacturer's warranty. For detailed information regarding warranty terms, conditions, and registration, please refer to the official Standard Horizon website or the warranty card included with your product.
Customer Support
For technical assistance, service, or additional product information, please contact Standard Horizon customer support directly. Contact details can typically be found on the manufacturer's official website or in the product packaging.
