MFJ-994BRT HF Automatic Remote Antenna Tuner
Instruction Manual
2011 MFJ Enterprises, Inc.
11
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.
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. 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
0
µ
H
•
Capacitance
0 pF on transmitter side
•
Target SWR
1.5
•
Auto Tune SWR
0.5 above target SWR
•
Memory
Bank A
•
Meter Range
3000 watts (high range)
•
Sticky-Tune
Off (Always resets to OFF when the power is cycled and after tuning)
Note: Resetting to factory defaults does not erase the antenna memories.