Hytera HM785 GPS BT Full Duplex / SFR, UHF 25W (Low Power UHF) - Professional DMR Mobile Two-way Radio

The HM785 supports both a standard single control head and a remote control head, available in single or dual configurations. This makes it suitable for a wide range of environments, including vehicles, motorcycles, and fixed control rooms, while ensuring efficient and reliable communication. The radio also offers multiple connection options, allowing advanced applications to be integrated into existing systems to improve overall work efficiency.

The HM785 supports full-duplex calling, enabling communication either between two HM785 radios or between the radio and landline or mobile phones. Conversations flow naturally and closely resemble face-to-face communication. In digital mode, the Single Frequency Repeater (SFR) function—available with the full-duplex hardware version—uses interference suppression technology to extend communication range in DMO mode. It does this by receiving a signal in one time slot and simultaneously retransmitting it in the other time slot on the same frequency.

Key highlights of the HM785

More flexible
Flexible control head options and a wide range of accessories allow installation based on user requirements. The remote control head connection cable is available in standard lengths of 3 m, 10 m, or 40 m. A customized cable length of up to 120 m is also supported.

Clearer audio
The HM785 uses AI-based noise cancellation technology to filter out background noise such as road noise, enhance voice clarity, and reduce feedback at close distances. This results in clearer audio for receiving radios.

More reliable
Enhanced receiver sensitivity improves audio quality in weak signal areas, helping to maintain clear and stable communication.

Rich and scalable applications
The radio supports multiple connection options through Bluetooth, accessory ports, and an Ethernet network interface. It also supports Clarity Transmission and back-to-back connections, making it easier to build flexible and scalable communication solutions.

HM785 specifications

General information

Frequency range
UHF (UV): 350–470 MHz

Channel capacity
1024 channels

Zone capacity
64 zones, with up to 256 channels per zone

Channel spacing
12.5 kHz, 20 kHz, or 25 kHz

Operating voltage
13.6 V ±15%

Current consumption (standby)
Less than 0.5 A

Current consumption (transmit)
5 W: less than 5 A
25 W: less than 8 A

Current consumption (receive)
Less than 2.0 A

Frequency stability
±0.5 ppm

Antenna impedance
50 ohms

Dimensions (H × W × D)
61.5 mm × 177 mm × 179 mm

Weight
1520 g

Display
2.4-inch display, 4 lines, 160 × 128 pixels, 262,200 colors

Bluetooth
Bluetooth 5.0 BLE + EDR (hardware option)

Receiver performance

Analog sensitivity
0.16 μV typical at 12 dB SINAD
0.18 μV at 12 dB SINAD

Digital sensitivity
0.18 μV at 5% BER

Adjacent channel selectivity
ETSI: 60 dB at 12.5 kHz, 70 dB at 20/25 kHz
TIA-603: 60 dB at 12.5 kHz, 70 dB at 20/25 kHz

Intermodulation
ETSI: 65 dB at 12.5/20/25 kHz
TIA-603: 70 dB at 12.5/20/25 kHz

Spurious response rejection
ETSI: 70 dB at 12.5/20/25 kHz
TIA-603: 70 dB at 12.5/20/25 kHz

Blocking
ETSI: 84 dB
TIA-603: 80 dB

Hum and noise
40 dB at 12.5 kHz
43 dB at 20 kHz
45 dB at 25 kHz

Rated audio power output (internal)
3 W at 8-ohm load

Rated audio power output (external)
7.5 W at 8-ohm load

Maximum audio power output (internal)
8 W at 20-ohm load

Maximum audio power output (external)
20 W at 8-ohm load

Rated audio distortion
3% or less

Audio response
+1 to −3 dB

Conducted spurious emissions
Less than −57 dBm

Transmitter performance

RF output power
Low power:
UHF: 1–25 W

FM modulation
11K0F3E at 12.5 kHz
14K0F3E at 20 kHz
16K0F3E at 25 kHz

4FSK digital modulation
12.5 kHz data only: 7K60FXD
12.5 kHz data and voice: 7K60FXW

Conducted and radiated emissions
−30 dBm above 1 GHz
−36 dBm below 1 GHz

Modulation limiting
±2.5 kHz at 12.5 kHz
±4.0 kHz at 20 kHz
±5.0 kHz at 25 kHz

FM hum and noise
40 dB at 12.5 kHz
43 dB at 20 kHz
45 dB at 25 kHz

Adjacent channel power
60 dB at 12.5 kHz
70 dB at 20/25 kHz

Audio distortion
3% or less

Digital vocoder
AMBE+2™

Digital protocol
ETSI TS 102 361-1, 361-2, 361-3

Environmental characteristics

Operating temperature
−30 °C to +60 °C

Storage temperature
−40 °C to +85 °C

Electrostatic discharge protection
IEC 61000-4-2, level 4
±15 kV air discharge
±8 kV contact discharge

Military standard compliance
MIL-STD-810G

Dust and water protection
IP54

Humidity resistance
Compliant with MIL-STD-810G

Vibration, drop, and shock resistance
Compliant with MIL-STD-810G