1. Introduction
The Hytera HP688 is a compact and lightweight professional DMR digital two-way radio designed for reliable communication. It offers loud and clear audio performance, extended coverage, and is powered by a lithium polymer battery. Built to operate in extreme environments, the HP688 ensures consistent connectivity. This manual provides essential information for setting up, operating, and maintaining your radio.
Figure 1: Front view of the Hytera HP688 radio.
2. Package Contents
Before you begin, please verify that all items are present in your package:
- 1 x HP688 Radio Unit
- 1 x Antenna (AN0435W09, whip antenna 400-470 MHz, 15.7 cm)
- 1 x BP2002 Lithium Polymer Battery (2000mAh)
- 1 x Smart Charging Cradle (CH10L30)
- 1 x Charger Adapter (PS1018)
- 1 x Belt Clip (BC48)
- 1 x Nylon Hand Strap (RO03)
Figure 2: Included accessories with the Hytera HP688 radio.
3. Setup and Installation
3.1 Attaching the Antenna
- Align the antenna with the antenna connector on the top of the radio.
- Rotate the antenna clockwise until it is securely fastened. Do not overtighten.
3.2 Installing the Battery
- Ensure the radio is powered off.
- Align the battery (BP2002) with the battery compartment on the back of the radio.
- Press the battery firmly into place until it clicks, indicating it is locked.
3.3 Attaching the Belt Clip
- Align the belt clip (BC48) with the grooves on the back of the radio.
- Slide the belt clip upwards until it locks into position.
3.4 Charging the Battery
- Connect the charger adapter (PS1018) to the smart charging cradle (CH10L30).
- Plug the charger adapter into a power outlet.
- Place the radio with the battery installed into the charging cradle. Ensure the charging contacts on the radio align with those on the cradle.
- The charging indicator on the cradle will show the charging status (e.g., red for charging, green for fully charged).
Figure 3: Side view of the radio with belt clip and charging contacts.
4. Operating Instructions
4.1 Powering On/Off
- To power on: Rotate the Power/Volume knob clockwise until a click is heard and the display illuminates.
- To power off: Rotate the Power/Volume knob counter-clockwise until a click is heard and the display turns off.
4.2 Adjusting Volume
Rotate the Power/Volume knob clockwise to increase the volume and counter-clockwise to decrease it.
4.3 Channel Selection
Use the Channel Selector knob (typically on top of the radio) to select the desired communication channel.
4.4 Making a Call
- Select the desired channel or contact.
- Press and hold the Push-to-Talk (PTT) button on the side of the radio to transmit.
- Speak clearly into the microphone.
- Release the PTT button to listen for a response.
4.5 Key Features
The Hytera HP688/685 supports a range of features for versatile communication:
- Operating Modes: Digital Conventional, Analog Conventional
- Voice Services: Private Call, Group Call, All Call, PSTN/PABX Call, Emergency Call, Priority Interrupt
- Safety Features: Emergency, Man Down, Lone Worker, Authentication, Air Interface Encryption, End-to-End Encryption, Disable/Enable
- Data Services: Text Message, Quick Text Message
- Connectivity: Bluetooth Audio/Data, GNSS (GPS, GLONASS), Open API
- Supplementary Functions: Profiles, Programmable Buttons, Interface Switcher, QR Code, Roaming, Remote Monitor, Radio Check, Alert Call
Figure 4: Radio display showing channel information.
5. Maintenance and Care
- Cleaning: Use a soft, damp cloth to clean the radio's exterior. Do not use harsh chemicals or abrasive cleaners.
- Battery Care: To prolong battery life, avoid overcharging and fully discharging the battery frequently. Store the battery in a cool, dry place when not in use.
- Storage: Store the radio in a dry, dust-free environment away from direct sunlight and extreme temperatures.
- Water Resistance: The radio is IP67 rated for water and dust resistance. Ensure all port covers are securely closed to maintain this rating.
6. 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 | Weak signal, microphone/speaker obstructed, or volume too low/high. | Adjust volume, check for obstructions, move to an area with better signal. |
7. Specifications
| Feature | Detail |
|---|---|
| Hytera Model | HP688 |
| Model Number | HP682/HP685/HP686/HP688/HP689 |
| Walkie Talkie Type | Portable |
| Output Power | 3W-5W (UHF: 1W/4W) |
| Battery Capacity | 2000mAh (BP2002) |
| Battery Life (5/5/90) | 20h (GNSS OFF); 16h (GNSS ON) |
| Waterproof / Water-Resistant | IP67 |
| Battery Included | Yes |
| Material | Plastic |
| Storage Channel | 1024 |
| Frequency Range | UHF: 400-527MHz |
| Channel Spacing | 12.5kHz/20kHz/25kHz |
| Dimensions | 122 x 55 x 31.5mm |
| Display | Yes |
| Maximum Range | 5km-10km |
| Weight (with antenna & battery) | 280g |
| Digital Vocoder Type | AMBE+2TM |
| Origin | Mainland China |
| Certification | CE, FCC, RoHS |
Figure 5: Various views of the Hytera HP688 radio.
8. Support
For any questions regarding your Hytera HP688/685 radio or assistance with your order, please contact the seller. Professional service and support are available to help you at any time.
