MFJ-939 Plug&Play IntelliTuner Automatic Antenna Tuner
Instruction Manual
2006-2015 MFJ Enterprises, Inc.
28
Delete Entire Antenna Memory
To delete an entire antenna memory (all four banks), first select the primary memory (1 or 2) that you
want to delete. See “ALT Button” on page 5 for details.
1.
Turn off the power to the tuner.
2.
Press and hold
both
the [TUNE] and [ALT] buttons while turning the power on. It takes
approximately three seconds to delete all four memory banks of the current antenna.
3.
Beep three times and release the buttons to resume normal operation. Remember that the selected
antenna memory will be lost!
Delete Antenna Memory Bank
To delete an antenna memory bank, first select the primary memory (1 or 2) and the memory bank (A, B,
C or D) that you want to delete. See “ALT Button” on page 5 for details.
1.
Turn off the power to the tuner.
2.
Press and hold
only
the [ALT] button while turning the power on. Both LEDs will blink until the
button is released.
3.
Within four seconds of releasing [ALT], press the [TUNE] button two times.
4.
After releasing [TUNE] for four seconds, the current memory bank is deleted.
5.
The unit will beep three times and resume normal operation. Remember that the selected antenna
memory bank will be lost! However, if the memory is off, no memory bank is deleted; then beep
two times and resume normal operation.
6.
Repeat the above procedure to delete the other memory banks, if desired.
Total Reset
To erase
both
primary memories (all eight banks) and reset to factory defaults:
1.
Turn off the power to the tuner.
2.
Press and hold
only
the [ALT] button while turning the power on. Both LEDs will blink until the
button is released.
3.
Within four seconds of releasing [ALT], press the [TUNE] button three times.
4.
After releasing [TUNE] for four seconds, both primary memories are deleted and factory defaults
are reset. The total reset takes approximately six seconds.
5.
The unit will beep three times and resume normal operation. Remember that both primary
memories will be lost!
Self Test
A self-test routine will check the functions of the MFJ-939. This routine checks the LEDs, 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 10 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 blinking the firmware version number via the two front panel LEDs. The green
LED blinks first, followed by the red LED. The version number X.Y is represented by the
