Tecsun R-9700DX - User Manual

R·9700DX
FM STEREO/MW/SW DUAL CONVERSION WORLD RECEIVER
OPERATING MANUAL
1. CONTROL LOCATIONS
2. BATTERYS
Open the battery compartment and insert 4 batteries (AA or UM-3) according
to the polarity marked next to the compartment. If the sound becomes low
or
distorted, replace with new batteries. If the set is not used for a long time,
remove all the batteries to prevent to possible battery leakage.
3.
AC POWER
To operate the rece i ver by using AC power, you need an external AC/DC
adaptor and connecting it to the DC jack (15). (See belows)
This receiver can incorporate the rechargeable batteries that can be
recharged by the external adaptor.
- 1-

Summary

Control Locations

Indicators and Displays

Details the various LED indicators for power, tuning, and FM stereo, as well as frequency and tuning displays.

Operating Controls

Describes buttons, switches, and knobs for light, power, auto on/off, volume, tuning, tone, and band selection.

Ports and Jacks

Covers the external connection points: DC jack for power, earphone jack, and antenna jack.

Antenna and Stands

Explains the built-in antenna and the folding and vertical stands for positioning the receiver.

Battery Compartment

Identifies the location of the battery compartment on the rear of the receiver.

Powering the Receiver

AC Power Operation

Instructions for connecting an external AC/DC adaptor to the DC jack for power.

Power On;Off and Volume Control

How to switch the receiver on/off and adjust the listening level using the volume control.

Tuning and Reception

Listening to FM

Steps for selecting the FM band, tuning to desired frequencies, and indicators for signal strength and stereo.

Listening to MW;SW

Guide to selecting MW or SW bands and tuning to frequencies, noting signal strength indicators.

Antenna Usage

Guidance on using the internal antenna for MW and extending/rotating the external antenna for FM/SW.

DX;Local Switch

Explanation of how to set the DX/Local switch for normal use or to reduce strong noise.

External Antenna Connection

Instructions on connecting an external antenna to the antenna jack to improve FM/SW reception.

Display Lighting and Positioning

Lighting the Display

Two methods for lighting the display: continuous on via selector or timed auto-off via button.

Receiver Positioning

Methods for positioning the receiver securely using its folding stand or vertical stand.

Specifications and Precautions

Technical Specifications

Details frequency ranges, sensitivity, power requirements, speaker/earphone specs, size, and weight.

Safety Precautions

Important warnings regarding burning, impact, cleaning, heat sources, sunlight, and battery handling.

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features

The R-9700DX is an FM Stereo/MW/SW Dual Conversion World Receiver, designed for receiving radio broadcasts across multiple frequency bands. It features a compact and portable design, making it suitable for both indoor and outdoor use.

Function Description

The receiver operates on FM stereo, Medium Wave (MW), and Shortwave (SW) bands, offering a wide range of listening options. It incorporates dual conversion technology, which typically enhances reception sensitivity and selectivity, especially for shortwave listening.

For FM reception, the device supports stereo output when using earphones, indicated by a dedicated FM stereo LED. Tuning is performed using a tuning knob, and a tune LED indicator illuminates when a strong signal is found, aiding in precise station selection.

The MW (AM) band utilizes an internal antenna, and optimal reception can be achieved by rotating the receiver. For FM and SW bands, a telescopic antenna needs to be fully extended and rotated for the best signal.

The R-9700DX includes a DX/Local switch to adjust reception sensitivity. The "DX" (Distant) setting is for normal use, while the "Local" setting is recommended when strong noise is present, helping to reduce interference from nearby powerful signals.

An external antenna can be connected via a dedicated jack to further improve FM/SW reception, which is particularly useful in areas with weak signals or for serious shortwave listening.

The display features a backlight with two operating methods: continuous illumination by switching a selector to "on," or a temporary 15-second illumination activated by a light button when the selector is in the "off" position.

For user convenience, the receiver includes two types of stands: a folding stand on the rear for resting the receiver at an angle, and a vertical stand on the bottom for upright positioning.

Important Technical Specifications

• Frequency Range:
  • FM: 87.5 - 108 MHz
  • MW: 525 - 1610 kHz
  • SW: 3.90 - 21.85 MHz
• Shortwave Meter Bands:
  • SW1: 3.90 - 4.00 MHz
  • SW2: 4.75 - 5.06 MHz
  • SW3: 5.95 - 6.20 MHz
  • SW4: 7.10 - 7.30 MHz
  • SW5: 9.50 - 9.90 MHz
  • SW6: 11.65 - 12.05 MHz
  • SW7: 13.60 - 13.80 MHz
  • SW8: 15.10 - 15.60 MHz
  • SW9: 17.55 - 17.90 MHz
  • SW10: 21.45 - 21.85 MHz
• Sensitivity:
  • FM: < 10 µV
  • MW: < 1 mV/m
  • SW: < 30 µV
• Power:
  • Battery: 4 x UM3 or AA batteries (DC 6V)
  • DC Jack: 6V (center positive)
• Speaker: 16 Ohm, 250 mW
• Earphone Jack: D 3.5 mm
• Dimensions: 181 x 116 x 31 mm
• Weight (battery not included): 400 g

Usage Features

• Power On/Off/Volume Control: A power selector switches the unit on or off, and a sliding volume control bar adjusts the listening level.
• Band Selection: A band selector switch allows users to choose between FM, MW, and various SW bands (SW1-SW10).
• Tuning: A tuning knob is used to select the desired frequency. A tune LED indicates strong signal reception.
• FM Stereo: When earphones are used for FM listening, an FM stereo LED illuminates, indicating stereo reception.
• Antenna: A telescopic antenna is used for FM/SW, while an internal antenna is used for MW. The receiver should be rotated for optimal MW reception.
• DX/Local Switch: This switch helps optimize reception by adjusting sensitivity, reducing noise in strong signal areas.
• External Antenna Jack: Allows connection of an external antenna for improved FM/SW reception.
• Display Backlight: Two methods for activating the backlight: continuous or temporary (15 seconds).
• Stands: Integrated folding and vertical stands provide flexible positioning options for the receiver.
• AC Power Option: The receiver can be powered by an external AC/DC adapter (not included) connected to the DC jack. It also supports rechargeable batteries that can be recharged via the external adapter.

Maintenance Features

• Battery Replacement: When the sound becomes low or distorted, batteries should be replaced with new ones. It is advised not to mix old and new batteries.
• Battery Removal for Storage: If the receiver is not used for an extended period, all batteries should be removed to prevent leakage.
• Cleaning: The cabinet should be cleaned with a soft cloth moistened with a mild soap and water solution. Abrasive powders should not be used.
• Environmental Precautions:
  • Avoid exposure to burning and impact.
  • Do not leave the unit near heat sources, in direct sunlight, or in places with excessive dust or mechanical shock.

The R-9700DX is designed to be a versatile and user-friendly world receiver, offering a comprehensive listening experience across various radio bands with practical features for both casual and dedicated listeners.

Tecsun R-9700DX Specifications