MFJ-993BRT 300 Watt IntelliTuner
TM
Automatic Remote Antenna Tuner Instruction Manual
© 2011 MFJ Enterprises, Inc
MFJ-993BRT Version 1A
9
Appendices
Resetting the Tuner
Each time the tuner is powered off, the microprocessor saves all memories and configurations to
nonvolatile memory ready to be used the next time the unit is turned on and transmit power is applied. If
the tuner is not working properly, even on initial power on, try resetting to the factory defaults.
Resetting requires removal of the cover and the switch board to gain access to the switches. The
components inside are static sensitive so make sure you are grounded to reduce the chance of a static
discharge to the switch board or the microprocessor portion of the board. Also there are no display or
meter functions available to give any visual prompts.
Factory Defaults
The unit is shipped with the following default settings:
•
Main Menu Digital Wattmeter
•
Setup Menu Target SWR
•
Inductance 0
µ
H
•
Capacitance 0 pF
•
Antenna 1
•
Tuning Mode Automatic
•
Target SWR 1.5
•
Auto Tune SWR 0.5 above target SWR
•
Amp Bypass SWR 2.0
•
Meter Range Auto range
•
Peak Hold On
•
Memory Bank 1A
•
IntelliTune On
•
SWR Beep Off
•
Beep On
•
Refresh Off
•
Radio Interface Off
•
Push Tune <0.5s To Bypass
•
Sticky-Tune On
Factory Default Reset
To reset the tuner to these defaults:
1. Turn off the power to the tuner.
2. Press and hold both the [TUNE] and [L-UP] buttons while turning the power on.
3. Release the buttons after 2 or 3 seconds.
4. Resume with normal operation.
Note: Resetting to factory defaults does not erase the antenna memories.
Note: If the MFJ-993BRT is not behaving properly or acting erratic, try resetting the tuner to factory
defaults.
Total Reset
To erase both antenna memories and reset to factory defaults, press and hold down the [TUNE], [C-UP]
and [L-UP] buttons while turning the power on. Press the YES [C-DN] button to delete both antenna
memories and reset factory defaults, or press the NO [L-DN] button to cancel. Release the button to
resume normal operation. Remember that both antenna memories will be lost!
