MFJ-998RT Legal Limit IntelliTuner
TM
Automatic Remote Antenna Tuner Instruction Manual
© 2011 MFJ Enterprises, Inc
MFJ-998RT Version 1A
20
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 when DEFAULTS RESET appears on the display.
4. Resume with normal operation.
Note: Resetting to factory defaults does not erase the antenna memories.
Note: If the MFJ-998RT 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. A confirmation message TOTAL RESET will display.
Press the YES [C-DN] button to delete both antenna memories and reset factory defaults (a progress bar
and RESET will display), or press the NO [L-DN] button to cancel (CANCEL will display). Release the
button to resume normal operation. Remember that both antenna memories will be lost!
Disable Radio Interface
The Radio Interface should not be turned on because there is no way to connect to the radio If the radio
interface is selected and the TURN ON RADIO message does not go away, disable the interface by
pressing and holding both [TUNE] and [MODE] buttons while turning the power on. The tuner will respond
with two beeps.
Delete Entire Antenna Memory
To delete an entire antenna memory (all four banks), select Antenna 1 or Antenna 2 with the [ANT] button
that you want to delete. Turn off power to the tuner, and then press and hold both the [TUNE] and [ANT]
buttons while turning the power back on. A confirmation message DELETE ANTENNA will display. Press
the YES [C-DN] button to delete the antenna memory (a progress bar and DELETED will display), or
press the NO [L-DN] button to cancel (CANCEL will display). Release the button to resume normal
operation. Remember that the selected antenna memory will be lost!
Delete Antenna Memory Bank
To delete an antenna memory bank, select Antenna 1 or Antenna 2 and the antenna memory bank with
the [ANT] button that you want to delete. Turn off power to the tuner, and then press and hold both the
[TUNE] and [C-UP] buttons while turning the power back on. A confirmation message DELETE BANK will
display. Press the YES [C-DN] button to delete the antenna memory (a progress bar and DELETED will
display), or press the NO [L-DN] button to cancel (CANCEL will display). Release the button to resume
normal operation. Remember that the selected antenna memory bank will be lost!
Self Test
A self-test routine will check the functions of the MFJ-998RT. This routine checks the display, the front
panel buttons, the internal memory, the audio circuitry, and the power-down circuitry. During the self test,
you may stop the test by turning off the unit; however, this should NOT be done during the memory test or
the memory could be corrupted. The self-test can be completed in approximately 30 seconds. Note:
Performing the self-test will reset the unit to its factory default settings.
Here is the self-test procedure:
1. Turn off the power to the tuner.
2. Unplug the radio interface cable, if one is connected, from the tuner.
3. Press and hold only the [TUNE] button while turning the power on.
4. The test begins by displaying a copyright message and firmware version numbers, such as This
is the test of the display. Release the [TUNE] button before the message completes.
5. You will be prompted to press each of the front-panel buttons.
