Hytera HM785 User Manual

8
3. Installation
3.1 Instructions
Before installing the radio in a vehicle, read the following instructions carefully:

Before installation, check the ground polarity and voltage of the vehicle power. The radio must work with a 13.6
V±15% negative ground electrical system.

Before installation, check how long the screws will extend from the bottom surface of the radio. Drill the mounting
hole cautiously to avoid damage to the vehicle wiring and other parts.

Before you install the radio in the mounting bracket, connect the antenna and power cord to the radio. Use the
dedicated antenna and power cord provided by the Company for digital radios.

Install the radio with the mounting bracket supplied by the Company, to avoid accidental radio looseness. The loose
radio may cause bodily injury.

Install the radio in a location where you can reach the front panel conveniently.

Keep sufficient clearance at the back of the radio for wiring.

Use the fuse with the same specification for DC power cord upon replacement.

If any other devices are in the vicinity of the radio, keep the antenna of these devices at least 10 m away from that
of the radio.
3.2 Tools

Electric drill

Phillips screwdriver

T20 torx screwdriver

Hytera HM785 Specifications

General

Channel Capacity	1024
Operating Voltage	13.6 V ± 15%
GPS	Yes
Bluetooth	Yes
Channel Spacing	12.5/20/25 kHz
Operating Temperature	-30°C to +60°C
Frequency Stability	±0.5 ppm
Antenna Impedance	50 Ω
Modulation Limiting	±2.5 kHz @ 12.5 kHz; ±4.0 kHz @ 20 kHz; ±5.0 kHz @ 25 kHz
Audio Distortion	≤3%
Intermodulation	≥65dB
Spurious Response Rejection	≥70dB
IP Rating	IP54
Frequency Range	UHF: 400-527MHz
Display	2.4-inch
Digital Protocol	DMR
FM Hum & Noise	≥40dB
Adjacent Channel Power	≥60dB
Audio Response	+1~-3dB
Conducted & Radiated Emission	-36dBm ＜1GHz; -30dBm ＞1GHz
Adjacent Channel Selectivity	≥60dB
Zone Capacity	64 (each with a maximum of 256 channels)
Sensitivity (Analog)	0.22 μV (12 dB SINAD)