User manual ALINCO DR-140

[. . . ] Electronics Division hereby declares on our sole responsibility that the product(s) listed below comply with the essential requirements of the Directive 1999/5/EC, The council of 3/9/99 on Radio Equipment and Tlecommunication Terminal Equipment and the mutual recognition of their conformity and with the provisions of Annex, after having performed the required measurements at Notified Bodies per Standards, and relative certificate(s) or document(s) can be reviewed at http://www. alinco. com/Ce/ . DR-140E SSB/CW/FM/AM HF TRANSCEIVER European amateur radio bands between 1. 8 MHz - 29 MHz as per specifications on page 94. This device is authorized for use in all Eu and EFTA memeber states. An operator's license is required for this device. Check with your local waste officals for details on recycling or proper disposal in your area. RoHS HF Transceiver DR-140T The FCC Part 15 approval is not required for amateur-radio use of this device in USA/Canada. Copyright © All rights reserved. No part of this document may be reproduced, translated or transcribed in any form or by any means without the prior permission of Alinco. Inc. , Osaka, Japan, English Edition Printed in Japan. Contents Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ALERT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] · In 10 dB attenuator position, a noise level may become slightly higher than the default position. This is due to the circuit design and not a defect. AGC (Automatic Gain Control) · The AGC function automatically adjusts the gain of strong signals and weak signals so that you can hear them at the same volume. 1. Press the [FUNC] key, then press the [M/KHz] key to select either the AGC-S or AGC-F mode. NOTE: You may select either AUTO or MANUAL for the [FUNC] key operation. In Auto setting, FUNC status is automatically canceled if no key entry is performed within 5 seconds after the [FUNC] is displayed. Refer to the Menu 23 in the Set mode (page 83) for more details. · AGC-S mode: The AGC recovery time is long, and suitable to SSB and AM modes. · AGC-F mode: The AGC recovery time is short, and suitable to CW mode. NOTE: The AGC is automatically set to Fast in CW, Slow in SSB and AM modes. You can manually change from S to F or vice versa during operation but turning off the unit will reset the temporary setting. If you prefer to manually select the AGC setting always and wish that the setting remains regardless of power on/off, please select the OFF parameter in the Set mode menu 10 (P. 77). 31 Chapter 2 Communications RIT (Receiver Incremental Tuning) 1. Press the [RIT] key. The "RIT" icon will appear on the LCD. 2. Rotate the RIT control knob to adjust the frequency. * To exit from the RIT function, press the [RIT] key repeatedly until both "RIT/TXIT" icons disappear. * Press the [FUNC] key, then press the [RIT] key to add the RIT shift frequency to the operating frequency and exit from RIT operation. Please refer to page 65 RIT/ TXIT function for more details. 32 Chapter 2 Communications 2. 2 Transmission Basics Introduction This section explains the preparations and basic procedures for transmission. Procedure Transmitting in the voice mode (SSB, AM and FM) 1. The reading on the RF meter and brightness of the TX LED will change according to the intensity of your voice. NOTE: Speaking too close to the microphone or too loudly may increase distortion and reduce clarity. 6. Release the [PTT] key to receive. REFERENCE: Split-frequency operation, page 45. 2. 4 Practical Techniques for SSB Operation Introduction In SSB operation, you may encounter various problems such as poor propagations and interferences. This section explains how to use the special functions to overcome these problems. Eliminating Interference (QRM) 1: Activating the IF SHIFT function This function eliminates interference by shifting the filter pass band without changing the receive frequency. Turn the IF knob clockwise or counterclockwise to lessen interference. "Nar" appears on the display indicating that the narrow filter is selected. 3: Activating the RF attenuator When the received signal is noisy, it is possible that you are picking up another strong signal from nearby. Press the [RF] key to activate the attenuator to a desired level. 36 Chapter 2 Communications Communicating in Bad Conditions In HF band, propagations depend on time, season, and propagation paths. For example, signals from the other station may fade or alternate between strong and weak. 1: Using the RF preamplifier Press the [RF] key repeatedly until [+10] appears. 2: Selecting the AGC-F mode In the SSB mode, the AGC-S mode is usually selected. However, if there are strong signals or noise near a weak signal, the signal is suppressed by the strong signals or noise. Press the [FUNC] key, then press the [MHz] key the "AGC-F" appears on the display. Communicating with Off-frequency Stations When communicating with a station that drifts his transmitting signal (QRH), use RIT so that you can fine-tune to his transmitting frequency without shifting your transmission signal. [. . . ] * Be sure turn off and remove from the power source to clean the product. * Use of cleaning devices made especially for delicate equipment such as personal computer or digital video/camera, like special wet-tissues, anti-static brushes, dry rubber-blower etc. is suitable to clean the surface of this product and accessories also. * Never use thinner, benzene, alcohol or any liquid solvent otherwise damages the product and voids warranty. [. . . ]