MFJ-998RT Legal Limit IntelliTuner
TM
Automatic Remote Antenna Tuner Instruction Manual
© 2011 MFJ Enterprises, Inc
MFJ-998RT Version 1A
9
The Menus
Main Mode Menus
These instructions are for setup and testing and the functions are not available for normal operation of the
MFJ-998RT. When accessing these settings and controls do not touch any of the components other than
the switches because of the chance of high RF voltages when tuning. Do not leave the cover off for
normal operation.
The main mode menus show various tuner settings and status. There are four main mode menus
arranged in a “wrap-around” structure. When powered on, tuner operation starts with the main menu that
was last used. Within each main menu, press the [MODE] button briefly to view the next main menu.
Press and hold the [MODE] button for two seconds to enter the setup mode (see below). Various tuner
indicators are shown on all four main menus: Antenna banks 1/2,
IntelliTune
TM
, Radio Interface, Memory,
LC Limit, Auto Range, Auto/Semi, and
StickyTune
TM
. Refer to Figures 6 and 7 for details on the displayed
information.
Note:
•
In sideband mode, the frequency readout on the tuner display jumps around to different
frequencies while transmitting and stops on another frequency when un-keyed. This is normal
and is a characteristic of sideband mode, because sideband signals jump up and down in
frequency and power.
•
In bypass mode, the decimal point in the SWR reading is replaced with a comma.
Digital Wattmeter Menu
Shows the frequency, SWR, and forward and reflected power in watts.
Power Bar Meter Menu
Shows the frequency, SWR, forward power, and bar meters for forward and reflected power. The top bar
meter is the forward power and the bottom bar meter is the reflected power. The numeric reading of
forward power appears at the end of the bar meters. Each power bar meter is consisted of 60 bar
segments. When in the high power range, multiple the readings on the printed power scale by ten and
each vertical bar segment consists of three dots. Below 1000 watts, each bar segment represents 20
watts; above 1000 watts, each bar segment represents 200 watts. The forward bar meter has a “peak
hold” feature. The peak meter hold function freezes the highest displayed bar segment of the forward
power for about one second, so that you can more easily read the meter. This function can be turned ON
and OFF in the Peak Hold setup mode. For low-power tuning, meter range of 300 watts is available.
When in the low power range, each vertical bar segment consists of two dots. Below 100 watts, each bar
segment represents two watts; above 100 watts, each bar segment represents 20 watts. Refer to the
“SWR/Wattmeter” section on page 13 for more details on power range. The power meter can be set to
auto range. Auto range automatically sets the meter scale according to the input RF power to the tuner.
Forward power greater than 300 watts or reflected power greater than 60 watts automatically sets the
meter to the high power range. Forward power less than 250 watts and reflected power less than 40 watts
automatically set the meter to the low power range. When auto range is on, a two-dot vertical segment
appears on the on-screen tuner indicator. Refer to Figures 3 and 4 for the on-screen Auto Range
indicator.
Figure 3 Low Power Forward and Reflected Bargraph Figure 4 High Power Forward and Reflected Bargraph
