1. Introduction
Thank you for purchasing the SI4732 All Band DSP Radio. This compact and versatile radio is designed to provide a wide range of listening experiences across various frequency bands. This manual will guide you through the setup, operation, and maintenance of your device to ensure optimal performance.
Figure 1: SI4732 All Band DSP Radio with telescopic antenna. Operating Modes: FM/AM/LSB/USB. Receiving Frequency Bands: HF/SW/MW/VHF.
2. Package Contents
Please check the package for the following items:
- 1 x SI4732 Mini Pocket Radio (V3S)
- 1 x Telescopic Antenna
- 1 x USB Type-C Charging Cable
- 1 x User Instruction Manual
3. Setup
3.1 Charging the Battery
- Locate the USB Type-C charging port on the side of the radio.
- Connect the provided USB Type-C cable to the radio and the other end to a standard USB power adapter (not included) or a computer USB port.
- The battery indicator on the screen will show charging status.
- A full charge typically takes a few hours. The radio has an 800mAh built-in battery.
- Note: This device does not support fast charging. Please use a standard 5V USB charger.
3.2 Attaching the Antenna
- For general reception, screw the telescopic antenna into the SMA-KE (inner hole) antenna interface on the top of the radio.
- For enhanced reception, especially on lower frequencies, an external loop antenna (e.g., Donut WB Antenna) can be connected to the SMA-KE port.
Figure 2: Radio with Donut WB Antenna. Frequency Range: LW, MW, SW (150kHz - 30MHz), VHF (64-108MHz).
3.3 Initial Power On
Press and hold the power button (usually integrated with the volume/tuning knob) for a few seconds until the screen illuminates. The radio will display the current frequency and mode.
4. Operating Instructions
4.1 Power On/Off
- To Power On: Press and hold the main rotary knob (often also the power button) for approximately 2-3 seconds.
- To Power Off: Press and hold the main rotary knob again for 2-3 seconds.
4.2 Mode and Band Selection
The radio supports multiple operating modes and receiving bands. Use the dedicated mode/band buttons or menu options to switch between them.
- Operating Modes: FM, AM, LSB, USB.
- Receiving Bands: HF, SW, MW, VHF (64-108MHz), LW, SW (150kHz - 30MHz).
4.3 Tuning and Frequency Adjustment
- Use the main rotary knob to tune through frequencies. Turning it clockwise increases the frequency, and counter-clockwise decreases it.
- The tuning step size can usually be adjusted via the menu for faster or finer tuning.
- The 1.9-inch IPS screen (170*320 resolution) will display the current frequency, mode, and other relevant information.
4.4 Volume Control
Adjust the volume using the dedicated volume control (often integrated with the main rotary knob or a separate button). The radio features a powerful 1W cavity speaker for clear audio.
4.5 Headphone Use
- Plug 3.5mm stereo headphones into the audio interface port.
- The radio includes an independent headphone amplifier circuit for enhanced listening volume and quality.
4.6 Display Settings
Access the menu to adjust display settings:
- Backlight Brightness: Adjust for optimal visibility in various lighting conditions (e.g., outdoor use).
- Battery Level Display: Monitor the remaining battery charge.
Figure 3: Compact Body, Full-Size Sound. Features Cavity Speaker and Built-in Independent Ear Amplifier Circuit.
5. Maintenance
5.1 Cleaning
- Wipe the radio's exterior with a soft, dry cloth.
- Do not use abrasive cleaners, solvents, or strong chemicals, as they may damage the finish.
- Avoid getting moisture into any openings.
5.2 Battery Care
- To prolong battery life, avoid fully discharging the battery frequently.
- If storing the radio for an extended period, charge it to about 50% and store in a cool, dry place. Recharge every few months.
5.3 Storage
- Store the radio in a dry place away from direct sunlight, extreme temperatures, and high humidity.
- Keep it away from strong magnetic fields.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Radio does not power on | Battery is depleted | Charge the battery using the USB Type-C cable. |
| Poor reception/static | Antenna not extended or connected properly; weak signal; interference | Fully extend the telescopic antenna or connect an external antenna. Move to an open area away from electronic devices. |
| No sound from speaker/headphones | Volume too low; headphones not fully inserted; faulty headphones | Increase volume. Ensure headphones are fully plugged in. Test with different headphones. |
| Screen is dim or unreadable | Backlight brightness set too low | Adjust backlight brightness in the display settings. |
7. Specifications
| Feature | Description |
|---|---|
| Model | V3S |
| Master Control | ESP-32-S3 |
| Working Modes | FM/AM/LSB/USB (Does not support aviation band) |
| Receiving Bands | HF/SW/MW/VHF, LW, MW, SW (150kHz - 30MHz), VHF (64-108Mhz) |
| Screen | 1.9-inch IPS, 170*320 resolution |
| Charging Port | TYPE-C (Cannot use fast charging) |
| Audio Interface | 3.5mm three-band stereo |
| Antenna Interface | SMA-KE (inner hole) |
| Battery Capacity | 800mAh |
| Product Dimensions | Approx. 73.00 x 32.00 x 12.00mm (2.87 x 1.26 x 0.47 inches) |
| Origin | Mainland China |
| Key Upgrades | Brand-new system (brightness, bandwidth adjustment), new hardware (independent headphone amplifier), high-quality production process. |
Figure 4: Product dimensions: 7.3cm/2.87in (length), 3.2cm/1.26in (height), 1.2cm/0.47in (thickness).
8. User Tips
- Portability: Its compact design makes it an excellent companion for travel, hiking, camping, or daily commutes.
- Clear Audio: Leverage the SI4732 DSP chip for exceptional reception and clear audio quality across all bands.
- Extended Listening: The 800mAh battery provides over 10 hours of continuous playback, ideal for long listening sessions without frequent recharging.
- Customization: Utilize the adjustable backlight brightness for comfortable viewing in any environment and explore firmware upgrade capabilities for enhanced functionality.
Figure 5: Easy to Carry, Good Outdoor Companion for hiking and camping trips.
9. Warranty and Support
For any warranty claims, technical support, or inquiries regarding your SI4732 All Band DSP Radio, please contact the seller or retailer from whom you purchased the product. Please retain your proof of purchase for warranty services.