MAGNUM 357DX
OPERATING MANUAL
Page 1: ...MAGNUM 357DX OPERATING MANUAL ...
Page 2: ...Copyright 2000 by Magnum International All rights reserved ...
Page 3: ...TABLE OF CONTENTS Introduction 4 Limited Warranty 5 Installation 6 7 Front Panel Controls 8 10 Other Features 10 Specifications 11 Contact Information 12 3 ...
Page 4: ...a pair of bi polar RF transistors in push pull operation The devices are continuously biased class A B using Magnum s exclusive fully regulated bias circuit This means unsurpassed audio qual ity in SSB and AM modes Some of the features of the 357DX are an advanced design liquid crystal display that provides the operator with a full visual account of the transceivers operating status automatic freq...
Page 5: ...t within 15 days from the purchase date If the warranty registration form and copy of your sales receipt are not received the radio is not covered under warranty Please fill out the enclosed warranty registration form and send it along with a copy of your sales receipt to Magnum International PO Box 445 Issaquah WA 98027 Registering your 357DX with Magnum provides several benefits 1 Validates your...
Page 6: ... Quantity Description 1 Magnum 357DX Control Deck 1 Magnum 357DX RF Deck 1 9 Foot 2 8m Control Cable 1 Microphone with Up Down Controls 1 Control Deck Bracket with Hardware 1 RF Deck Bracket with Hardware 1 Microphone Hanger with Hardware 1 Manual Schematic Warranty Form 2 Microphone Hanger The microphone hanger may be attached to the side of the control deck or any other convenient location Use t...
Page 7: ...base loaded whip antenna normally provides effective communications For greater range and more reliable operation a full quarter wave whip may be used Once the antenna is mounted on the vehicle route the coaxial cable so that it is not next to any power cables or vehicle cables Connect the PL 259 to the antenna connector on the rear panel of the RF deck Make sure that the cables does not interfere...
Page 8: ...NC 10 control the FUNC prompt will be displayed in upper left hand corner of LCD Push the control again to deactivate the function control 2 3 4 10 1 5 6 7 8 9 11 16 17 12 13 15 14 4 STEP NB 1 STEP Tuning Step The STEP control selects fre quency resolution in either 1 kHz 10 kHz or 100 kHz steps Press the STEP button one of the digits will flash on and off Press the STEP button again to change ste...
Page 9: ...eceived signal is no longer detected To stop scanning press the SCAN button or momen tarily press the PTT button on the microphone scan ning will stop without transmitting SHIFT Shift Offset Used for programming offsets to operate repeater networks The 357DX can transmit and receive on different frequencies To program the offset press the FUNC button and hold down the SHIFT button for 3 or more se...
Page 10: ...ived white noise is muted For best results rotate the squelch the minimum amount necessary to mute the white noise 15 PWR Variable RF Output Power Rotate clockwise to increase RF output power Rotate counterclockwise to decrease RF output power Variable RF output power allows low power transmit ting for QRP operation in compliance with the FCC re quest for reduced signal strength during periods whe...
Page 11: ... Transistors SD1446 x2 Spurious Emissions More than 50 dB below peak output power Carrier Suppression More than 40 dB below peak output power Unwanted Sideband More than 50 dB below peak output 1 kHz tone FM Deviation 2 kHz maximum Audio Response More than 30dB below peak output Frequency Response 400 to 2800 Hz Microphone Impedance ECM 600 to 1K ohms RECEIVER SPECIFICATIONS Circuit Type Dual Conv...
Page 12: ...NATIONAL A Division of RF Limited PO Box 445 Issaquah WA 98027 Telephone 425 558 9592 Facsimile 425 558 9704 Technical Support Only 1 877 MAGNUM 9 1 877 624 6869 http www MagnumRadio com E Mail info MagnumRadio com ...
