HanRongDa HRD-737 - User Manual

User Manual For HRD-737
Wide frequency receiver
FM/MW/SW/AIR/CB/VHF WORLD BAND RECEIVER
Thanks for purchasing the wide frequency radio. Please read this manual before
using. Please keep it well for future reference.
1.HRD-737 radio overview information
The radio is a small pocket size.Convenient to carry outside.and it has high
reception sensitivity.
It is the entry toy for the radio yuan fans and the auxiliary use product for the
off-road yuan fans (VHF channel reception).
Flight information for frequent flyer users.
the radio can receive FM/AM/SW/CB/AIR/VHF bands.
please take a notice:
the AM band have two modes:AM step value:9k.AM step value :10k.
the radio VHF also band two modes:VHF-N/VHF-W.
users can according to the actual need to adjust by themselves).
About the VHF band more information:
VHF NFM:Receive coast channel/train channel/racing channel/weather band
/VHF intercom reception
VHF-W:Receiving campus channel /TV sound
The frequency and volume of the product to add and reduce control design
independent key, can be manually search station signal and automatic search
station signal function, AM step value users can adjust themselves according to
actual condition, is a very personalized products.Simple and convenient
operation.

Summary

HRD-737 Radio Overview

Product Appearance and Components

Power and Lock Functions

Describes power/sleep and button lock functions for device control and security.

Audio and Connectivity Ports

Details audio output, power input, and antenna connections for versatile use.

Display and Control Buttons

Explains the LCD display and all operational buttons for radio functions and settings.

User Accessories

Lists practical accessories like the carrying rope for enhanced portability.

LCD Display Symbols

Frequency and Time Indicators

Explains symbols related to frequency, time, and band units displayed on the LCD.

Status and Alarm Icons

Describes symbols for lock, battery, alarm, and sleep modes shown on the display.

Operational and Sensitivity Icons

Details icons for band selection, memory, volume, and signal strength.

Operation Instructions

Power and Sleep Operations

Instructions for turning the radio on/off, setting sleep timer, and using RSSI indicator.

Lock Function Usage

Guide to locking/unlocking buttons to prevent accidental changes or shutdown.

External Power and Charging

Details on connecting external power via DC5V USB and battery charging process.

Earphone and Antenna Usage

Information on connecting headphones and extending the telescopic antenna.

Volume Adjustment Methods

Explains two methods for adjusting volume: step-by-step and rapid adjustment.

Memory Recall Operation

Instructions for recalling stored memory stations using specific buttons.

Advanced Operations

Preset Station Storage

Step-by-step guide to storing favorite radio stations into memory channels.

Mode Conversion

Details how to switch audio modes (MONO/ST) and step values for different bands.

Setting Time and Alarm

Instructions for setting the clock and configuring the alarm function.

System Settings and Scanning

Squelch Function

Enables or disables the squelch function to reduce background noise.

Band Exchange and Alarm

How to switch between radio bands and set alarm clock parameters.

Auto Scanning Function

Automatically searches and stores radio stations across frequency bands.

Frequency Tuning

Explains step-by-step and quick frequency searching for desired stations.

Radio Features and Specifications

Orange Backlight

Describes the orange backlight feature activated by button presses.

TV Sound Reception

Information on receiving TV sound frequencies and potential interference.

Main Specifications

Technical Performance

Details frequency ranges, receiving sensitivities, and distortion degrees.

Physical and Power Details

Lists product size, speaker, battery, and operating voltage specifications.

Antenna Usage Guidance

Provides advice on using the antenna for optimal reception of FM, AM, and SW broadcasts.

Important Notices

Battery and Usage Precautions

Advises on battery removal, low battery indicators, and avoiding physical damage.

Environmental Storage

Guidelines for storing the radio in suitable temperature and humidity conditions.

Maintenance and Disassembly

Warns against using chemical solvents for cleaning and disassembling the radio.

HanRongDa HRD-737 Specifications

General

Frequency Range (FM)	64-108 MHz
Frequency Range (AM)	522-1620 kHz
AM Receiving Sensitivity	≤1 mV/m
Signal to Noise Ratio	≥50 dB
Maximum Output Power	3W
Power Supply	DC 5V
Speaker	3W
Battery	Lithium-ion rechargeable
Charging	USB