MFJ-994BRT HF Automatic Remote Antenna Tuner
Instruction Manual
2011 MFJ Enterprises, Inc.
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Contents
THE BASICS
Introduction ...................................................................................................................................... 1
Features ........................................................................................................................................... 2
Specifications ................................................................................................................................... 2
Fast Start.......................................................................................................................................... 3
Internal components......................................................................................................................... 4
C-UP and C-DN Buttons ..................................................................................................... 4
L-UP and L-DN Buttons ...................................................................................................... 4
AUTO Button....................................................................................................................... 4
TUNE Button ....................................................................................................................... 4
POWER Button ................................................................................................................... 4
Connections ..................................................................................................................................... 5
Transmitter .......................................................................................................................... 5
Ground ................................................................................................................................ 5
Wire ..................................................................................................................................... 5
Antenna ............................................................................................................................... 5
Installation ........................................................................................................................................ 6
MISCELLANEOUS
Antenna Memory.............................................................................................................................. 7
Intellitune Algorithym ........................................................................................................................ 7
LC Limits .......................................................................................................................................... 7
Tuner Status Indicators .................................................................................................................... 8
Foldback Circuit ............................................................................................................................... 8
Grounding Hints ............................................................................................................................... 9
Antenna System Hints...................................................................................................................... 9
Location............................................................................................................................... 9
Matching Problems ............................................................................................................. 9
APPENDICES
Firmware Version Number ............................................................................................................. 11
Resetting the Tuner........................................................................................................................ 11
Factory Defaults ............................................................................................................... 11
Delete Antenna Memory ................................................................................................... 11
Total Reset ........................................................................................................................ 12
Self Test ......................................................................................................................................... 12
Power Down Circuit Test................................................................................................................ 13
Relay Test ...................................................................................................................................... 13
Frequency Counter Calibration ...................................................................................................... 14
SWR Bridge Calibration ................................................................................................................. 15
In Case of Difficulty ........................................................................................................................ 15
Technical Assistance ..................................................................................................................... 16
List of Accessories ......................................................................................................................... 16
Block Diagram ................................................................................................................................ 17
