LDG M-7600 Operation Manual

M-7600 OPERATIONS MANUAL MANUAL REV A

7600

LDG M-7600 External

Meter for Icom IC-

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LDG Electronics

1445 Parran Road

St. Leonard MD 20685-2903 USA

Phone: [phone]

Fax: [phone]

[e-mail]

www.ldgelectronics.com

Table Of Contents

Introduction 3
Jumpstart, or “Real hams don’t read manuals!” 3
Specifications 4
Getting to know your M-7600 4

Front Panel: 4
Back Panel: 5

Installation 6
Setup 7

Initial Calibration 7
Meter Parameter Selection 8

Operation 9
Application Notes 9

Base Station Use 9
Remote Use 9
Other Applications 9

Care and Maintenance 10
Technical Support 10
Two-Year Transferrable Warranty 10
Out Of Warranty Service 11
Returning Your Product For Service 11
Product Feedback 12

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INTRODUCTION

LDG pioneered the automatic, wide-range switched-L tuner in 1995. From its laboratories in
St. Leonard, Maryland, LDG continues to define the state of the art in this field with innovative
automatic tuners and related products for every amateur need.

Congratulations on selecting the LDG Electronics M-7600. The M-7600 provides accurate
and precise metering for a wide range of receive and transmit parameters. While many users will
choose to display S-meter readings on receive, and Power Output on transmit, several other
useful readings are available.

The M-7600 plugs into the external meter jack on the Icom IC-7600 transceiver. The
parameter displayed on the M-7600 can be either the same as the parameter displayed on the
main IC-7600 virtual meter, or can be independant of what is displayed on the main meter,
giving the flexibility to watch two parameters at the same time.

JUMPSTART, OR “REAL HAMS DON’T READ MANUALS!”

Ok, but at least read this one section before operating the M-7600:

1. Configure the IC-7600 for normal operation.

2. Plug the M-7600 into the radio’s meter jack using the included 1/8” mono cable. The meter jack

is on the rear of the transceiver, between the DC Out jack and the External Keypad jack.

3. Optionally, connect a 12 volt, 250mA DC power supply to the 2.5x5.5mm coaxial power jack

(center positive) on the rear of the M-7600. This only is needed for powering the backlight; the

meter will function without 12V.

4. Using the radio’s setup menu, select which parameter to display on the M-7600 under the ACC

menu, “External Meter Output” menu.

5. Operate the radio normally; the meter will continuously display the selected value. S-meter

function is normally shown on receive, and the selected parameter on transmit.

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SPECIFICATIONS

Giant, 4.75” (diagonal) 500 µA analog meter movement.

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S-meter on receive, Drive current, Drive voltage, Power Output, SWR, Compression level,

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and ALC on transmit.
Externally powered cool blue backlighting with adjustable brightness.

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On/Off switch for backlight.

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Dimensions: 5.3 x 4.2 x 4.7 inches.

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Backlight requires 12VDC, 250mA. 2.5 x 5.5mm jack, center positive.

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GETTING TO KNOW YOUR M-7600

Your M-7600 is a quality, precision instrument that will give you many years of outstanding
service; take a few minutes to get to know it.

Front Panel:

The front panel of the M-7600 shows seven calibrated scales:

S: Received signal strength

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: Final Output Transistors Drain Current (Amps)

I

•

D

PO: Transmit power output in watts

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SWR: Transmit Standing Wave Ratio

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COMP: Compression ratio, in dB

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ALC: Auto Level Control

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: Final Output Transistors Drain Voltage

V

•

D

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