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MFJ-991 / MFJ-994 IntelliTuner Automatic Antenna Tuners
Press and hold
C-UP
Press and hold
C-DN
Press and hold
L-DN
Press and hold
TUNE
Press and hold
TUNE
Press and hold
TUNE
Press and hold
TUNE
Press and hold
TUNE
Press and hold
TUNE
Press and hold
Firmware Version Number
Make sure the meter is calibrated. To obtain the firmware version number, press and hold the [C-UP]
button while turning the power on. The version number X.XY is represented by the meter forward needle
for X.X and the reflected needle for Y. For example, forward needle on 10 watts mark and reflected
needle on 2 watts mark represent firmware version number 1.02. Release button to resume normal
operation.
Resetting the Tuner
Each time the tuner is powered off, the microprocessor saves all memories and configurations to non-
volatile memory ready to be used the next time the unit is turned on again. If the tuner is not working
properly, even on initial power on, try resetting to the factory defaults.
Factory Defaults
The unit is shipped with the following default settings:
•
Inductance
•
Capacitance
•
Target SWR
•
Auto Tune SWR
•
Meter Range
© 2004 MFJ Enterprises, Inc.
Appendices
POWER-ON OPERATIONS
(Press and hold buttons while turning on the power.)
+
+
+
+
+
C-UP
+
+
+
L-UP
+
+
C-DN
+
+
L-DN
+
+
+
C-DN
L-DN
+
+
C-UP
L-UP
Figure 8. Power-On Operations.
0 µH
0 pF on transmitter side
1.5
1.0 above target SWR
300 watts (high range) (600 watts in model MFJ-994)
to get the firmware version number.
POWER
to test the relays.
POWER
to test the power-down circuitry.
POWER
to start the self test.
POWER
to calibrate the wattmeter.
POWER
to calibrate the SWR bridge.
POWER
to delete the antenna memory.
POWER
to reset factory defaults.
POWER
to perform total reset.
POWER
to calibrate the frequency counter.
POWER
Instruction Manual
15
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