Magnum 357DX Operating Manual

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Magnum 357DX Operating Manual | Manualzz

MAGNUM 357DX

OPERATING MANUAL

Copyright © 2000 by Magnum International. All rights reserved.

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 -

INTRODUCTION

Congratulations on your purchase of a Magnum 357DX 10 meter FM/SSB/AM transceiver. The 357DX is designed to provide years of enjoyment and trouble-free service. There are many features and functions designed into this transceiver. To ensure that your investment is enjoyed to its fullest extent, please take a few moments and thoroughly read this manual.

The Magnum 357DX is a microprocessor controlled, user programmable radio combining both high RF performance with a user-friendly environment. The 357DX is a 12 volt DC, HF transceiver designed for mobile use. The transceiver is configured in two separate components; a high powered RF deck and a compact sized control deck. The two decks are linked via a proprietary control cable. As cabin space diminishes in modern vehicles, this concept helps create a wider variety of installation options. Although engineered with mobile use in mind the 357DX, with the addition of a high quality 50-amp power supply, may be easily adapted for fixed station operation.

The control deck utilizes the latest in surface mount production techniques. This keeps the size of the unit to a minimum without sacrificing any of the advanced circuits required for today’s high performance radios. The

RF deck incorporates 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 quality 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 frequency scanning from either the front panel or microphone, memory storage of your favorite frequencies and modes, programmable frequency resolution of either 1 kHz, 10 kHz or 100 kHz, and split frequency operation for repeater use. These are just a few of the features that make the 357DX a pleasure to own and operate.

IMPORTANT: The Magnum 357DX is designed for amateur radio use. If the transmitter is operated in the

United States or within it’s territories a licensed amateur radio operator must be present at the station. The minimum license class to operate 10 meter phone is Novice/Technician. If you are studying for your license and want to familiarize yourself with the operation of the radio, the receiver may be operated with or without a licensed operator present. For more information regarding FCC licensing, contact your nearest amateur radio dealer, or for complete details contact the American Radio Relay League.

American Radio Relay League (ARRL)

225 Main Street

Newington, CT 06111

Telephone 860-594-0200

Facsimile 860-594-0259 http://www.arrl.org

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LIMITED WARRANTY

Magnum International warrants this product to be free of defects for a period of one (1) year from the original date of purchase. This warranty is non-transferable. This limited warranty is subject to repair or replacement of defective components only. This warranty is void if the radio has been tampered with or misused.

IMPORTANT: RETAIN YOUR SALES RECEIPT

The enclosed warranty registration form must be filled out and mailed along with a photocopy of your sales receipt 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 warranty.

2) Entitles you to free updates and information regarding your radio and new accessories for your radio.

3) Provides possible recovery of lost or stolen radios through our serial number tracking database.

4) Receive your free Magnum logo baseball cap within 30 days after registering.

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External

Speaker Jack

Control Deck

(rear panel)

Control Cable

D-SUB Jack

Control Cable

D-SUB Plug

Control Cable

(9 Feet)

RF Deck

(rear panel)

Antenna

Connector

Control Cable

D-SUB Jack

Control Cable

D-SUB Jack

Power Lead

Red (+)

Black (-)

INSTALLATION

1.

Contents

Unpack and inspect your Magnum 357DX for missing or damaged components. Your 357DX includes the following items:

Quantity Description

1 Magnum 357DX Control Deck

1

1

Magnum 357DX RF Deck

9 Foot (2.8m) Control Cable

1

1

1

1

1

Microphone with Up/Down Controls

Control Deck Bracket with Hardware

RF Deck Bracket with Hardware

Microphone Hanger with Hardware

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 the provided screws to attach the microphone hanger either vertically or horizontally to the side of the transceiver.

3.

Control Deck Mounting

When attaching the control deck mounting bracket to the vehicle, choose a location that will provide easy access to all front panel controls and air circulation to the rear panel. When selecting a mounting location, make sure that there is ample space behind the control deck for the control cable. Do not pinch, or bend sharply, the control cable. Do not install the control deck in any compartment that restricts airflow and do not install the control deck in a location that interferes with the safe operation of the vehicle.

Attach the mounting bracket to the vehicle first then mount the control deck to the bracket. If the rear panel is not accessible you may want to attach the control cable prior to mounting.

- 6 -

Top Mounting

Channels

4.

RF Deck Mounting

When mounting the RF deck, choose a location that is close to the antenna and the power source. This will maximize RF performance. Make sure that there is ample space around the RF deck for air circulation and for the cabling. Do not pinch, or bend sharply, the control cable, coaxial cable or power cable.

The RF deck may be mounted to hang from the bracket

(as shown below) or rest on the bracket (as in floor board mountings). The top mounting channel is used to hang the RF deck and the bottom channel is used in floor board mountings. See illustration below.

First, attach the mounting bracket to the vehicle with the provided sheet metal screws. Make sure the bracket is extremely secure and stable - the RF deck is heavy!

Next, loosely attach all hardware to the bracket. Attach the hardware as shown in the illustration below, with the rubber washer between the square nut and the bracket (rubber washer is not shown in illustration).

Slide the RF deck onto the bracket so that the square nuts enter the appropriate mounting channel. The rubber washers should be between the bracket and the

RF deck to avoid scratching. Once in position, tighten the screws to secure the RF deck.

Bottom Mounting

Channels

5.

Electrical Connections

The Magnum 357DX is designed to work on any 13.8

volt DC, negative ground, source. The condition of a vehicle’s electrical system can affect operation. A low battery, worn generator/alternator, or poor voltage regulator will seriously impair the performance of the transceiver. Any of the above conditions could result in a high level of receiver noise generation or a substantial loss of the transmitter’s RF output. Make sure that all of these components of your vehicle’s electrical system are in good condition prior to installing the transceiver.

CAUTION!

VOLTAGE EXCEEDING 15 VDC WILL DAMAGE THE

RADIO. MEASURE VOLTAGE AT BATTERY TERMI-

NALS, WITH VEHICLE RUNNING, PRIOR TO IN-

STALLATION!

Before making any electrical connections make sure the AF gain (volume) control on the control deck is in the “OFF” position. The 357DX power lead is located on the RF deck and must be connected directly to the vehicle’s battery. Connecting directly to the battery has several benefits, the first of which is to maximize RF output. Secondly, the battery is a very large capacitor and will help eliminate certain types of ambient and vehicle noise. Thirdly, the Magnum 357DX draws upwards of 40 amps and most vehicles’ electrical systems can not handle this amount of current.

For most installations, additional power cable will be required. When running additional power cable, make sure to use 8 gauge, or larger, cable.

Available separately from Magnum is a professional vehicle installation kit for your 357DX, model VI-12.

The VI-12 kit includes everything (including extra power cable) for a safe and professional vehicle installation.

6.

Antenna Connection

The transceiver will operate using any standard 50ohm ground-plane, vertical, mobile whip, long wire or similar antenna. The antenna should be rated at 500 watts PEP minimum. A standard SO-239 type antenna connector is located on the rear panel of the RF deck.

Connection is made using a PL-259 and high grade coaxial cable (RG213, RG58A/U or Mini RG-8 is recommended).

A ground-plane antenna provides greater coverage and is recommended for fixed station-to-mobile operation.

For point-to-point fixed station operation, a directional beam antenna operates at greater distances even under adverse conditions. A non-directional antenna should be used in a mobile installation; a vertical whip is best suited for this purpose. The base loaded whip antenna normally provides effective communications.

For greater range and more reliable operation, a full quarter wave whip may be used.

- 7 -

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 with the safe operation of the vehicle.

7.

VSWR

After you have determined that the installation is correct and the radio is operational, it is important to determine the antenna system’s VSWR (voltage standing wave ratio). Prior to taking any measurements make sure the SWR bridge (meter) is in good working order and is calibrated.To ensure your radio is performing properly the VSWR should never exceed 1.5 to 1. Never transmit on any antenna system where the VSWR exceeds 1.8 to 1. This will stress the output stage and could destroy the RF transistors; this type of misuse and failure is not covered under warranty.

8.

Control Cable Connection

The 357DX control deck and RF deck are connected by a proprietary control cable. This control cable is approximately 9 feet long and features two D-SUB connectors with 13W3 pin arrangements.

The control cable is non-directional, therefore either end may be attached to the control deck or RF deck.

IMPORTANT: The control cable is a tuned cable! Do not under and circumstances attempt to shorten or lengthen the cable. Do not cut the cable, or unsolder any of the wires inside the D-SUB connectors. If a longer or shorter cable is required for your installation, contact Magnum International for more information.

The control cable should only be routed through safe, dry locations that do not interfere with the operation of the vehicle and do not put the control cable at risk of damage.

Do not allow the control cable to be bent sharply or routed in a way that may cause damage to the cable.

Do not coil excess control cable! Coiling the cable creates an inductive reaction and can create high standing waves under certain operating conditions. Plan your installation carefully to avoid having excess control cable.

Do not put force or strain on any part of the control cable or connectors.

After routing the control cable, carefully push the D-

SUB connectors into the jacks on the rear panels of the control deck and RF deck. When connecting the control cable, take care in lining up the connectors to avoid ‘shorting-out’ any of the pins. Secure the connectors by tightening the screws with your fingers. Be careful not to over-tighten the screws.

16 17 12 13 14 15

1

FRONT PANEL CONTROLS

1.

MIC: Microphone Input: A 6-pin, lock ring type, microphone connector is used. Microphone wiring is as follows:

Pin 1 : Microphone Audio

Pin 2 : Receive

Pin 3 : Transmit

Pin 4 : Down (Up w/ 22K Ohm Resistor)

Pin 5 : Ground

Pin 6 : +13.8 VDC

2.

MIC-G: Microphone Gain: Increases or decreases the energy developed in the microphone amplifier circuit.

The gain increases as the control is rotated clockwise.

For optimum setting, press the push-to-talk (PTT) switch on the microphone, adjust the mic gain control until all segments of the S/RF display are lit. Next, rotate the control counterclockwise until the last segment of the display starts to flicker. The S/RF display is the bar graph located on the lower edge of the LCD screen.

3.

RF-G: RF Gain: Adjusts the receiver sensitivity to both signals and background noise. This affects the distance at which a signal can be detected. Turning the control counterclockwise reduces the receiver sensitivity. This is particularly useful in situations where large volumes of signals are present. The S/RF display indicates the received signal’s strength. The S/RF display is the bar graph located on the lower edge of the LCD screen.

IMPORTANT!

Operating some of the features in 4 through 9 require the use of the function control. To activate the function control, momentarily push the FUNC

(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

5

6

7

8

9

10 11

4.

STEP \ NB \ 1

STEP: Tuning Step. The STEP control selects frequency 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 stepping resolution.

To tune frequencies in either 10 kHz or 100 kHz increments, press the STEP button until the desired digit is flashing. Rotate the FREQUENCY control in either direction. The entire frequency range of the Magnum

357DX can be stepped through in 10 or 100 kHz increments.

To tune in 1 kHz increments, press the STEP button until the 1 kHz digit flashes on and off. Rotate the FRE-

QUENCY control. NOTE: When stepping in 1 kHz increments, you are limited to tuning within a 10 kHz frequency range.

NB: Noise Blanker. Noise blanker on and off control.

This circuit eliminates pulse type interference usually associated with automotive ignition systems. To activate the noise blanker, press the FUNC control and then press the NB button. NB will appear on the LCD indicating the noise blanker is turned on. To turn off the noise blanker, repeat the same process.

1: Memory Channel 1. After programming this button is memory channel 1. See M.LOAD \ M.SAVE control for programming instructions.

5.

LCR \ RPT \ 4

LCR: Last Channel Recall. Press the LCR button to return to the last frequency that was transmitted on for more than 3 seconds.

- 8 -

RPT: Repeater Access Tone. Most repeaters require an 88.5 Hz tone burst to access. To activate the 88.5

Hz tone burst, press the FUNC control and then press the RPT button. RPT will appear on the LCD indicating that the tone burst will now automatically be transmitted whenever the PTT is pressed. To deactivate, repeat the same process.

4: Memory Channel 4. After programming this button is memory channel 4. See M.LOAD \ M.SAVE control for programming instructions.

6.

CALL \ 2

CALL: The call frequency is 29.300 MHz, FM. The radio’s operating frequency and mode is automatically reset to this when the CALL button is pressed.

2: Memory Channel 2. After programming this button is memory channel 2. See M.LOAD \ M.SAVE control for programming instructions.

7.

MODE \ T. LOW \ 5

MODE: Operating Mode. Press the MODE control to select the operating mode. The operating mode is indicated on the liquid crystal display: AM, FM, USB, or

LSB.

T. LOW: Tone Low. Press the FUNC button, and then press the T. Low button to turn on the receive audio tone control. LOW will appear on the LCD when the low tone is activated. This feature will roll-off high frequency noise (i.e. “white” noise). Under many operating conditions this will improve the clarity and understanding of received signals.

5: Memory Channel 5. After programming this button is memory channel 5. See M.LOAD \ M.SAVE control for programming instructions.

8.

SCAN \ SHIFT \ 3

SCAN: Frequency Scan. Scans in increments of 10 kHz. There are two ways to scan using the front panel controls.

(1) Receive Audio On Scanning: Press the SCAN button. Scan rate is one step every 5 seconds. To stop scanning press the SCAN button again, or momentarily press the PTT button on the microphone (scanning will stop without transmitting).

(2) Receive Audio Mute Scanning: Carefully rotate the squelch control a minimum excursion (refer to 14) until the receive audio is off. Press the SCAN button. The receiver scan rate will now be five frequencies per second. When a signal is detected the squelch is automatically disengaged and the scanning is paused. The squelch circuit will automatically re-engage and the receiver will continue to scan the moment the received signal is no longer detected.

- 9 -

To stop scanning, press the SCAN button, or momentarily press the PTT button on the microphone (scanning 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 seconds. Three digits will appear on the LCD. This is the offset frequency in kHz. Rotate the FREQUENCY control until the desired offset frequency is displayed. To return to the main display press the FUNC button and hold down the SHIFT button for 3 or more seconds, or momentarily press the PTT button on the microphone (the transmitter will not be engaged).

To activate the programmed offset frequency, press the FUNC button, and then press the SHIFT button once. +SHIFT is displayed on the LCD. The 357DX will now transmit on the frequency that is XXX kHz greater than the displayed, or receive, frequency (XXX represents the programmed offset frequency in kHz).

To transmit on the frequency that is XXX kHz lower than the displayed, or receive, frequency press FUNC, then the SHIFT button. Repeat this until -SHIFT is displayed on the LCD.

To disengage the programmed offset frequency, press the FUNC button and then press the SHIFT button.

Repeat this until the SHIFT indicator is no longer displayed on the LCD.

3: Memory Channel 3. After programming this button is memory channel 3. See M.LOAD \ M.SAVE control for programming instructions.

9.

M.SAVE \ M.LOAD

M.SAVE: Memory Save. To save in memory a specific frequency and operating mode, select the desired mode and rotate the FREQUENCY control to the desired frequency. Press the FUNC button, and then press the

M.SAVE button. S will appear on the LCD next to the frequency. While S is displayed, immediately press any of the memory channel buttons (1 - 5). The mode and frequency is now saved into memory. If the S indicator disappears before you press the memory channel button, the information will not be saved and the process must be repeated.

M.LOAD: Memory Load (Recall). To load, or recall, any of the saved memory channels press the M.LOAD

button. L will appear on the LCD for several seconds.

While the letter is displayed press the desired memory channel button (1 - 5). The programmed mode and frequency will be displayed.

10. CLAR \ FUNC

CLAR: Clarifier. The clarifier shifts both the TX and

RX frequency 1 kHz each side of the center frequency.

This is necessary for tuning to an SSB signal. Rotate the clarifier control clockwise or counterclockwise to tune an SSB signal.

FUNC: Function. This control is used to operate the six control buttons on the front panel that are printed in blue. Press slightly and release, FUNC will be displayed on the LCD indicating that the function command is activated. After you have pressed one of the six control buttons the FUNC will disappear from the screen.

11. FREQ: Frequency. Rotate clockwise or counterclockwise to select the desired frequency.

12. OFF / VOLUME

OFF: Turns the power to the radio on and off.

VOLUME: Adjusts the AF gain, or volume of the received audio. Turn clockwise to increase and counterclockwise to decrease.

14. SQ: Squelch. Used to eliminate background or “white” noise when monitoring strong signals. Also used to activate SCAN feature (refer to 8).

To properly adjust the squelch circuit, rotate the control clockwise until the received 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 transmitting for QRP operation in compliance with the FCC request for reduced signal strength during periods when propagation levels are high.

16. Push-To-Talk Switch: Press and hold the switch to transmit. TX will appear on the LCD screen when transmitting. Release the switch to receive.

17. UP / DN: Up and Down Frequency Controls. Press the

UP control to increase in frequency. Press the DN control to decrease in frequency.

OTHER FEATURES

1.

PROGRAMMING TONE

This tone sounds each time the CPU is being programmed. It is helpful, in the beginning so you can be sure the command has been entered. You may turn off the tone by simply pressing the PTT switch on the microphone and turning on the ON/OFF POWER switch at the same time. Repeat this process to turn on the programming tone.

2.

MEMORY BACK UP

The 357DX features a super-capacitor back up for the

5 memory channels. The 357DX can be disconnected from a power source for approximately 4 or 5 days before the memory is lost.

- 10 -

GENERAL SPECIFICATIONS

Frequency Coverage

Antenna Impedance

Frequency Control

Frequency Accuracy

Power Requirement

Current Consumption

Control Deck Dimensions

RF Deck Dimensions

Control Cable Dimensions

Control Deck Weight

RF Deck Weight

Control Cable Weight

: Transmit and Receive ...................................... 28.000 to 29.699 MHz

: 50 ohm, unbalanced

: Digital Phase-Lock Loop (PLL) Synthesizer

: Better than +10 ppm from 0 - 40 0 C after 15 min. warm up

: 12 - 13.8 V DC, negative ground

: 35 amps maximum

: 6 x 2 x 8 in (W x H x D)

: 7.75 x 3.25 x 7 (W x H x D)

: 9 ft x 0.4 in (L x Ø)

: 2.4 lbs

: 4.1 lbs

: 1.3 lbs

TRANSMITTER SPECIFICATIONS

Power Output

Tuning Steps

Final Transistors

Spurious Emissions

Carrier Suppression

Unwanted Sideband

FM Deviation

Audio Response

Frequency Response

Microphone Impedance

: SSB ..................................................................................... 150 Watts

: FM ....................................................................................... 100 Watts

: AM ............................................... 50 Watts Average / 150 Watts PEP

: 1 kHz / 10 kHz / 100 kHz

: SD1446 (x2)

: More than 50 dB below peak output power

: More than 40 dB below peak output power

: More than 50 dB below peak output (1 kHz tone)

: +/- 2 kHz maximum

: More than 30dB below peak output

: 400 to 2800 Hz

: ECM, 600 to 1K ohms

RECEIVER SPECIFICATIONS

Circuit Type

Intermediate Frequencies

Sensitivity

Selectivity

: Dual-Conversion Superheterodyne

: 1st IF / SSB IF .................................................................. 10.695 MHz

: 2nd IF ..................................................................................... 455 kHz

: SSB ............................................................. 0.25 µV at 10 dB S + N/N

: AM ................................................................ 1.0 µV at 10 dB S + N/N

: FM ................................................................... 0.3 µV at 12 dB SINAD

: SSB ................................................ 4.2 kHz (-6 dB) / 8.5 kHz (-60 dB)

: AM / FM .......................................... 6.0 kHz (-6 dB) / 18 kHz (-60 dB)

Clarifier Range : +/- 1 kHz

Adjacent Channel Rejection : Better than 70 dB

IF Rejection

Frequency Response

: Better than 80 dB for all frequencies

: 250 to 3000 Hz

Audio Output Power

Audio Output Impedance

: 2 watts minimum at 10% THD with an 8 ohm load

: 8 ohms

- 11 -

MAGNUM INTERNATIONAL

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 [email protected]

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