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MFJ MFJ-998 User Manual

MFJ MFJ-998
52 pages
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INSTRUCTION MANUAL
CAUTION: Read All Instructions Before Operating Equipment
MFJ ENTERPRISES, INC.
300 Industrial Park Road
Starkville, MS 39759 USA
Tel: 662-323-5869 Fax: 662-323-6551
COPYRIGHT 2007-2010 MFJ ENTERPRISES, INC.
C
Model MFJ-998
VERSION 1E
Legal Limit IntelliTuner
Automatic Antenna Tuner
TM

Table of Contents

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MFJ MFJ-998 Specifications

General IconGeneral
TypeAutomatic Antenna Tuner
Frequency Range1.8 - 30 MHz
Input Impedance50 Ohms
Output Impedance50 Ohms
SWR Range1:1 to 3:1
Power Handling1500 Watts PEP
Tuning TimeTypically less than 2 seconds
Antenna Impedance16 to 150 Ohms
Tuning TechnologyMicroprocessor controlled
MeteringSWR / Power
DisplayLCD
Power Requirements13.8 VDC

Summary

The Basics

Features

Lists key features like 1500W handling, 20,000 memories, and Amplifier Bypass Control.

Specifications

Details technical specs including impedance, power, frequency range, and connectors.

Amplifier Protection

Explains the Amplifier Bypass Control for protecting amplifiers during tuning.

Fast Start

Provides a step-by-step guide for initial setup and operation of the tuner.

Front Panel

Overview of the tuner's front panel interface and controls.

SWR/Wattmeter

Describes the cross-needle meter for measuring forward, reflected power, and SWR.

Tuning and Power Buttons

Details operation of TUNE, StickyTune, Auto/Semi modes, and POWER button.

Back Panel Connections

Describes connectors on the rear panel like Amp Enable, Power, Serial Port, and Antenna connectors.

Radio Interface

Explains the RJ-45 connector for radio control and compatible radios.

The Menus

Setup Mode Menus

Guides users through customizing tuner settings like Target SWR and Meter Range.

Radio Interface Menu

Selects the radio interface type for communication with the tuner.

Operation

Manual Tuning

Explains how to manually adjust inductance and capacitance for tuning.

Appendices

Resetting the Tuner

Details procedures for factory defaults, total reset, and deleting memory.

Factory Defaults

Lists the default settings for various tuner parameters.

Analog Meter Calibration

Step-by-step guide to calibrate the analog SWR/Wattmeter.

SWR Bridge Calibration

Instructions for calibrating the internal SWR bridge.

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