Hytera HM685 DMR mobile two-way radio VHF

This new generation entry-level professional DMR mobile two-way radio is designed to provide reliable voice and data communication in both vehicles and desktop installations. Compact and lightweight, the radio is easy to install. With the ergonomic design, the four piano-style buttons make operations effortless. The AI-based noise cancellation ensures the radio delivers superb clear audio without ambient noise. The radio is born to be your best partner in transportation, business, utilities, and more.

RELIABLE COMMUNICATION

Thanks to the high RX sensitivity, the HM685 can deliver clear and dependable communications even in areas where the signal is unstable or weak.

DIGITAL AND ANALOGUE COMPATIBILITY

The HM685 can operate in either analogue or digital mode, which is the ideal solution for you to migrate from analogue to digital with minimal disruption and investment.

INNOVATIVE DESIGN

Compact and lightweight, the HM685 is easy to install, remove, or operate in the vehicle. The front panel adopts two-shot molding to make the operation more recognizable. The transflective display is readable even in the dark or direct sunlight. At the bottom of the display, the four piano-style keys offer great haptic feedback when pressed.

CRYSTAL-CLEAR AUDIO

The HM685 delivers superb audio in noisy streets or highways. The AI-based noise cancellation filters out echoes and background noises such as horn and engine sounds, making you hear and be heard in the conversation. The howling suppression prevents the screeching or howling feedback between two radios in the same vehicle, ensuring clear and uninterrupted communication on the move.

SUPERIOR DURABILITY

The HM685 withstands harsh temperatures, shock, and vibration, and meets MIL-STD-810G standards, and IP54 for dust and water intrusion. The connection between the palm microphone and the 10-pin aviation connector is very secure preventing it from becoming loose. The palm microphone cord has excellent stretching ability to protect it thus giving the maximum service life.

Technical Specifications

General

Frequency range VHF: 136-174 MHz

Channels & zones Channel capacity: 512, Zone capacity: 16

Channel spacing analogue 12.5kHz/20kHz/25kHz

Channel spacing digital 25kHz

Operating voltage 13.6 V DC ±15%

Current drain standby: <0.5 A, receive: <2.0 A, transmit 5W: <4 A, transmit 25W: <8 A, transmit 45W: <12 A

Frequency stability +0.5 ppm

Antenna impedance 50 Ohm

Dimensions (H×W×D) mm 164 x 159 x 42mm

Weight 1150g

Display 1.45 inch, 4 lines

Digital protocol ETSI-TS102 361-1,-2,-3

Receiver

Sensitivity Analogue: 0.18µV (12dB SINAD), Analogue: 0.16µV (12dB SINAD) (typical), Digital: 0.18µV / BER 5%

Selectivity TIA-603: 65dB @12.5kHz / 75dB @20/25kHz, ETSI: 50 dB @12.5kHz / 70dB @20/25kHz

Inter-modulation TIA-603: 75dB @12.5/20/25kHz, ETSI: 70dB @12.5/20/25kHz

Spurious Response Rejection TIA-603: 75dB @12.5/20/25kHz, ETSI: 70dB @12.5/20/25kHz

Blocking TIA-603: 90 dB, ETSI: 84 dB

Hum and Noise 40dB @12.5kHz; 43dB @20kHz; 45dB @25kHz

Rated Audio Power Output internal (20 Ohm load): 3W, external (8 Ohm load): 6W

Max Audio Power Output internal (20 Ohm load): 7.5W, external (8 Ohm load): 20W

Rated Audio Distortion <3%

Audio Response +1 to -3 dB

Conducted Spurious Emission < -57 dBm

Transmitter

RF Power Output Low Power model: 5-25 W

FM Modulation 11K0F3E @12.5kHz, 14K0F3E @20kHz, 16K0F3E @25kHz

4FSK Digital Modulation 12.5kHz data only: 7K60FXD, 12.5kHz data and voice: 7K60FXW

Conducted/Radiated Emission -36dBm @<1GHz; -30dBm @>1GHz

Modulation Limiting ±2.5kHz @12.5kHz; ±4.0kHz @20kHz; ±5.0kHz @25kHz

FM Hum and Noise 40dB @12.5kHz; 43dB @20kHz; 45dB @25kHz

Adjacent Channel Power 60dB @12.5kHz; 70dB @20/25kHz

Audio Response +1 to -3 dB

Audio Distortion <3%

Digital Vocoder Type AMBE+2

Environmental

Operating temperature -30℃ to +60℃

Storage temperature -40℃ to +85℃

ESD IEC 61000-4-2 (level 4), +8kV (contact); +15kV (air)

American Military standardMIL-STD-810G

Dust & water protection IP54

Humidity per MIL-STD-810G standard

Shock and vibration per MIL-STD-810G standard