HM685

Mobile | DMR

Highlights

diagram indicating highlights of HM685

Reliable Communication

Can deliver clear and dependable communications in areas where the signal is unstable or weak.

Digital and Analogue Compatibility

Can operate in either analogue or digital mode.

Innovative Design

It is compact & lightweight, so 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 in the dark or direct sunlight. At the bottom of the display, four keys offer great haptic feedback.

Wireless Connection

It can work with BT audio accessories to boost safety and productivity during in-vehicle communications.

Crystal-clear Audio

Delivers superb audio in noisy streets or highways. AI-based noise cancellation filters out echoes and background noises, preventing screeching or howling feedback between two radios in the same vehicle, ensuring clear and uninterrupted communication on the move.

Superior Durability

It withstands harsh temperatures, shock, and vibration, and meets MIL-STD-810G standards, and IP54 for dust and water intrusion.

Aviation Connector and Curly Cord

Strong and secure 10 pin aviation connector and curly cord with excellent stretching ability.

Transflective LCD Display

Transflective LCD display is readable even in the dark or direct sunlight.

Volume/Channel Navigation Keys

Easy to operate Volume/Channel Navigation keys

Piano-style Haptic Function Keys

Piano style Haptic function keys provide greater feedback to the operator with Programming keys for customised operation and quick access to features used on a regular basis)

Functions

Created with Sketch. 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.

Created with Sketch. 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.

Created with Sketch. 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.

StayConnected-0x20 Wireless Connection

With the built-in BT 5.0 module*, the HM685 can work with the BT audio accessories to boost your safety and productivity during in-vehicle communications. And these radios can be programmed through BT, saving time and resource.*Please be advised that this feature is applicable to the BT HM685 version only

Created with Sketch. 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.

MIL-STD-20x20 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.

Accessories for HM685

Included as standard with HM685 Included as standard with HM685

Antenna

Charger & Power

Cables

Mounting

Audio

Related products that work with the HM685

Technical Specifications

General

Frequency range
UHF: 400-470 MHz
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
High Power model: 5-45 W (UHF); 5-50 W (VHF)
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 standard
MIL-STD-810G
Dust & water protection
IP54
Humidity
per MIL-STD-810G standard
Shock and vibration
per MIL-STD-810G standard

Location Service

GNSS
GPS, GPS+GLONASS, GPS+BDS
TTFF (time to first fix) cold start
< 1 minute
TTFF (time to first fix) hot start
< 10 seconds
Horizontal accuracy
< 5 meters