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Hytera HD785 User Manual

Hytera HD785
513 pages
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Table of Contents

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Hytera HD785 Specifications

General IconGeneral
Channel Capacity1024
Operating Voltage7.4 V
Operating Temperature-30°C to +60°C
Storage Temperature-40°C to +85°C
Dust & Water IntrusionIP67
Shock & VibrationMIL-STD-810 C/D/E/F/G
Frequency RangeUHF: 400-527 MHz
Channel Spacing12.5/25 kHz
BatteryLi-ion
Display2.4-inch
RF Power OutputVHF: 5W

Summary

Product Controls

Baseband Section

3.2 Control Section Interfaces

Explains OMAP5912 processor, memory, clock, reset, SPI, MCBSP, USB, UART, I2C, MICROWIRE, MCSI1.

3.4 Troubleshooting Flow Chart

Provides a step-by-step guide for troubleshooting baseband section issues.

GPS Circuit

4.2 Schematic Diagram

Presents the detailed schematic diagram of the GPS circuit.

4.4 Troubleshooting Flow Chart

Guides users on troubleshooting common GPS circuit issues and their resolutions.

Interface Definition

J1601: 50-Pin Interface

Defines pin assignments, names, functions, and valid levels for the 50-pin interface.

UHF1 (400-470MHz) Information

7.1 Transmitter Circuit

Describes the transmitter circuit, including RF power amplifier, filters, and APC.

7.2 Receiver Circuit

Details the components of the receiver circuit like filters, amplifiers, and IF processor.

7.3 Frequency Generation Unit (FGU)

Explains the working principles of VCO and PLL within the FGU.

7.6 Schematic Diagram

Presents detailed schematic diagrams for various circuits of the radio.

7.7 Parts List

Lists all components used on the main board with reference numbers and descriptions.

7.8 Troubleshooting Flow Chart

Provides a troubleshooting guide for receiver circuit issues.

UHF2 (450-520MHz) Information

8.1 Transmitter Circuit

Details the transmitter circuit, including RF power amplifier, filters, and APC.

8.6 Schematic Diagram

Presents detailed schematic diagrams for the UHF2 radio circuits.

8.8 Troubleshooting Flow Chart

Provides a troubleshooting guide for receiver circuit issues specific to UHF2.

UHF3 (350-400MHz) Information

9.6 Schematic Diagram

Presents detailed schematic diagrams for various circuits.

9.8 Troubleshooting Flow Chart

Provides guidance for troubleshooting receiver circuit issues.

UHF5 (806-941MHz) Information

10.6 Schematic Diagram

Provides detailed schematic diagrams for various circuits.

10.8 Troubleshooting Flow Chart

Provides a troubleshooting guide for receiver circuit issues.

VHF (136-174MHz) Information

11.6 Schematic Diagram

Presents detailed schematic diagrams for various circuits.

11.8 Troubleshooting Flow Chart

Provides a troubleshooting guide for receiver circuit issues.

Disassembly and Assembly

Exploded View

Packing Guide

Specifications

Receiver Specifications

Details receiver sensitivity, selectivity, intermodulation, spurious response, blocking, audio output, and distortion.

Transmitter Specifications

Covers RF power output, conducted/radiated emissions, and modulation limiting.

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