MFJ-994B IntelliTuner Automatic Antenna Tuner
Instruction Manual
©
2004-2010 MFJ Enterprises, Inc.
19
Appendices
POWER-ON OPERATIONS
(Press and hold buttons while turning on the power.)
Press and hold + + to calibrate the SWR bridge.
Press and hold + to start the self test.
Press and hold + + to reset factory defaults.
TUNE
L-DN
Press and hold + + to calibrate the wattmeter.
Press and hold + + to delete the antenna memory.
TUNE
C-DN
Press and hold + + + to perform total reset.
TUNE
C-DN
L-DN
C-UP
Press and hold + to get the firmware version number.
C-DN
Press and hold + to test the relays.
Press and hold + + to calibrate the frequency counter.
L-DN
Press and hold + to test the power-down circuitry.
POWER
POWER
POWER
POWER
POWER
POWER
POWER
POWER
POWER
L-UP
C-UP
L-UP
C-UP
C-DN
C-DN
L-DN
POWER
Figure 10. Power-On Operations.
Important:
The radio interface cable must be disconnected from the tuner, if the radio power is
off, before performing any of the following power-on operations.
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.YY is represented by the meter forward needle
for X (forward reading
÷
10) and the reflected needle for YY (reflected reading). For example, forward
needle on 20-watt mark and reflected needle on 2-watt mark represent firmware version number 2.02.
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. When the power is off, the tuner is bypassed (straight through from TRANSMITTER
to ANTENNA and WIRE). When power is turned on, the tuner powers-up bypassed, but will revert to
the last stored matching values or begin tuning on application of RF power when the TUNE button is
pressed – or if Automatic or Sticky-Tune is enabled. If the tuner is not working properly, even on initial
power on, try resetting to the factory defaults.
