MFJ IntelliTuner MFJ-993 User Manual

MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual
 2005-2012 MFJ Enterprises, Inc.
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• Meter Range 300 watts (high range) †
• Peak Hold ON †
• Memory Banks 1A and 2A on †
• IntelliTune
On †
• SWR Beep Off
• Beep On
• Refresh Off
• POR Sticky Tune On
† These settings are stored separately for antennas 1 and 2.
Note: Resetting to factory defaults does not erase the antenna memories.
To reset the tuner to these defaults:
1. Turn off the power to the tuner.
2. Press and hold both the [TUNE] and [L-DN] buttons while turning the power on.
3. Release the buttons when DEFAULTS RESET appears on the display and both meter needles read
full scale.
4. Resume normal operation.
WARNING: If the MFJ-993B is behaving weirdly or acting erratic, try resetting the tuner to
factory defaults.
Delete Antenna Memory
To delete an antenna memory, 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 [C-DN] buttons while
turning the power back on. A confirmation message
DELETE ANTENNA will display. Press the YES
[C-UP] button to delete the antenna memory (
DELETED will display and both meter needles go to full
scale), or press the NO [L-UP] button to cancel (
CANCEL will display and both meter needles go to zero
scale). Release the button to resume normal operation. Remember that the selected antenna memory will
be lost!
Total Reset
To erase both antenna memories and reset to factory defaults, press and hold down the [TUNE], [C-DN]
and [L-DN] buttons while turning the power on. A confirmation message
TOTAL RESET will display.
Press the YES [C-UP] button to delete both antenna memories and reset factory defaults (
RESET will
display and both meter needles go to full scale), or press the NO [L-UP] button to cancel (
CANCEL will
display and both meter needles go to zero scale). Release the button to resume normal operation.
Remember that both antenna memories will be lost and tuner settings will return to default!
Self Test
A self-test routine will check the functions of the MFJ-993B. This routine checks the display, the meter,
the front-panel buttons, the internal memory and the audio 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.

MFJ IntelliTuner MFJ-993 Specifications

General

Type	Automatic Antenna Tuner
Input Impedance	50 Ohms
Output Impedance	50 Ohms
Wire Output	Yes
Bypass Switch	Yes
Frequency Range	1.8-30 MHz
Power Handling	150 Watts
Tuning Time	Typically 5 seconds, 15 seconds max
Power Requirements	12-15 VDC