1. Introduction
The Hytera S1 Pro NVOC is a compact and feature-rich Digital Mobile Radio (DMR) designed for reliable and clear communication. This manual provides essential information for the safe and efficient use of your S1 Pro radio.
Figure 1: Hytera S1 Pro NVOC Radio Overview
2. Package Contents
Please check the contents of your package against the list below. If any items are missing or damaged, contact your dealer immediately.
Standard Packing List:
- 1 x S1 Pro Radio (NVOC Version)
- 1 x Stubby Antenna (400-440MHz)
- 1 x Belt Clip
- 1 x 2200mAh Battery
- 1 x Nylon Strap
- 1 x User Manual
Figure 2: Standard Package Contents (Pearl White)
Optional Packing List (with Charger Set):
- 1 x S1 Pro Radio (NVOC Version)
- 1 x Stubby Antenna (400-440MHz)
- 1 x Belt Clip
- 1 x 2200mAh Battery
- 1 x Nylon Strap
- 1 x User Manual
- 1 x Charger Set (EU Power adapter + Type-C cable)
Figure 3: Optional Package Contents (Metal Grey with Charger)
3. Setup
3.1 Radio Parts and Controls
Figure 4: Hytera S1 Pro Parts and Controls
- Antenna: Transmits and receives radio signals. Replaceable.
- On-Off Key: Powers the radio on or off.
- LED Indicator: Shows radio status (e.g., transmitting, receiving, charging).
- OLED Screen: Displays battery level, frequency, status, channel, and more.
- OK/Menu Key: Confirms selections or accesses the menu.
- Navigation Key: Programmable for navigating menus or changing settings.
- Back/Channel Key: Programmable for returning to previous menu or changing channels.
- 360° Multifunctional Knob: Used to change channels, switch menu items, edit numbers, and more.
- Strap Hole: For attaching a wrist strap.
- Belt Clip: For attaching the radio to a belt.
- PTT Key (Push-to-Talk): Press and hold to transmit, release to receive.
- Audio Jack (3.5 mm): For connecting an earpiece or external audio accessory.
- Volume Key: Adjusts the speaker volume.
- Battery: Provides power to the radio.
3.2 Installing the Battery
The S1 Pro uses a replaceable 2200mAh battery. To install:
- Align the battery with the battery compartment on the back of the radio.
- Gently push the battery into place until it clicks securely.
3.3 Installing the Antenna
The S1 Pro comes with a stubby antenna (400-440MHz). To install:
- Screw the antenna clockwise into the connector on the top of the radio until it is finger-tight. Do not overtighten.
3.4 Charging the Battery
Before initial use, fully charge the battery. The S1 Pro supports USB Type-C charging.
- Connect the USB Type-C cable to the radio's charging port.
- Connect the other end of the cable to a compatible USB power adapter (e.g., the EU Power adapter if included in your package) or a computer's USB port.
- The LED indicator will show the charging status. A full charge can take several hours.
Figure 5: Battery and Charging Features
4. Operating Instructions
4.1 Powering On/Off
Press and hold the On-Off Key until the radio powers on or off.
4.2 Adjusting Volume
Use the Volume Key to increase or decrease the audio output level.
4.3 Selecting Channels
Rotate the 360° Multifunctional Knob to cycle through available channels. The selected channel will be displayed on the OLED screen.
4.4 Transmitting and Receiving
- To transmit, press and hold the PTT (Push-to-Talk) Key. Speak clearly into the microphone.
- Release the PTT Key to receive.
4.5 OLED Display Information
The HD OLED display provides real-time information including:
- Battery level
- Current frequency
- Radio status (e.g., transmitting, receiving)
- Current channel number and name
- Zone information
4.6 AI-Based Noise Cancellation
The S1 Pro features AI-based noise cancellation, filtering out up to 30 dB of ambient noise for clearer communication. This feature is automatically active to enhance audio quality.
Figure 6: AI Noise Cancellation in action
4.7 Whisper Mode
Activate Whisper Mode to speak softly while still being heard clearly by the recipient. This is useful for maintaining privacy or avoiding disturbance in quiet environments.
4.8 Privacy Protection (Password)
The S1 Pro supports password protection for group calls. Only radios with the correct password can join a specific group call, preventing unauthorized listening and interference from other groups.
Figure 7: Whisper Mode and Password Protection
4.9 Programming and Configuration
The S1 Pro can be programmed and configured using the Hytera Radio App via Bluetooth.
- Hytera Radio App: Download the official Hytera Radio App to your Android phone. Connect your radio via Bluetooth to manage settings, perform batch configurations, and back up frequency information.
- AirClone: This feature allows you to quickly clone configuration data from one S1 Pro radio to multiple others, simplifying deployment for teams.
Figure 8: Hytera Radio App and AirClone Functionality
4.10 NVOC Version Compatibility
Important: The NVOC version of the Hytera S1 Pro can only be connected to other Hytera S1 or S1 Pro radios. It is not compatible with standard DMR radios from other manufacturers in the market due to different vocoder technology.
Figure 9: NVOC vs. AMBE++ Compatibility Notice
5. Maintenance
5.1 General Care
- Keep the radio dry. If it gets wet, wipe it immediately.
- Clean the radio's exterior with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Ensure the antenna and battery contacts are clean and free of debris.
5.2 Battery Care
- To maximize battery life, avoid overcharging or completely draining the battery frequently.
- Store the battery in a cool, dry place when not in use.
- If the battery is not used for an extended period, charge it to about 50% before storing.
5.3 Water and Dust Resistance
The Hytera S1 Pro is rated IP55 for water and dust resistance. This means it is protected against dust ingress and low-pressure water jets from any direction. While robust, it is not designed for submersion in water.
6. Troubleshooting
If you encounter issues with your Hytera S1 Pro, refer to the following common problems and solutions:
| 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 | Volume too low, microphone/speaker obstructed, or weak signal. | Adjust volume, clear obstructions, ensure good signal strength. |
| Cannot connect to other DMR radios | NVOC version incompatibility. | The NVOC version of S1 Pro is only compatible with other Hytera S1 or S1 Pro radios. It will not connect to generic DMR radios using AMBE++ vocoders. |
| Programming issues via app | Bluetooth not enabled, app not updated, or incorrect pairing. | Ensure Bluetooth is on, update Hytera Radio App, re-pair the device. |
If the problem persists after trying these solutions, please contact Hytera customer support or your authorized dealer.
7. Specifications
The following table outlines the key technical specifications of the Hytera S1 Pro NVOC radio:
Figure 10: Hytera S Series Feature Comparison (S1 Pro details)
| Feature | Specification |
|---|---|
| Brand Name | Hytera |
| Model Number | S1 Pro / HYT-S35 |
| Walkie Talkie Type | Portable |
| Frequency Range | UHF: 400-470 MHz |
| Output Power (W) | 0.5W-3W (1W / 3W for 400-470 MHz) |
| Battery Capacity (mAh) | 2200 mAh |
| Battery Life (5/5/90) | 15 hrs (Tx 3W), 22 hrs (Tx 1W), 27 hrs (Tx 0.5W) |
| Waterproof / Water-Resistant | IP55 |
| Material | Plastic |
| Storage Channel | 256 |
| Dimensions (H x W x D) | 108 x 53 x 20 mm (Without Antenna) |
| Weight | 145 g (with belt clip) |
| Display | Yes (1.3 inch OLED) |
| Bluetooth | BT 5.0 BLE (only data) |
| Certification | CE, FCC, RoHS |
8. User Tips
- Maximize Battery Life: Utilize the 0.5W power setting for extended battery life (up to 27 hours) when maximum range is not critical.
- Clear Communication: Take advantage of the AI Noise Cancellation for clearer audio, especially in noisy environments.
- Easy Programming: Use the Hytera Radio App on your Android phone for convenient programming and configuration changes via Bluetooth. This avoids complex manual programming.
- Team Setup: For multiple radios, use the AirClone feature to quickly duplicate settings across devices.
- Privacy: Remember to set a password for group calls to ensure privacy and prevent unauthorized access.
- Check Compatibility: Always remember that the NVOC version of this radio is only compatible with other Hytera S1 or S1 Pro models.
9. Support
For any questions regarding your Hytera S1 Pro radio, technical assistance, or service inquiries, please contact your authorized Hytera dealer or Hytera customer support. Professional service is available to assist you.
