MFJ-994B IntelliTuner Automatic Antenna Tuner
Instruction Manual
©
2004-2010 MFJ Enterprises, Inc.
13
Meter
Frequency Range (kHz)
Memory Resolution (kHz)
160
1800 – 2000
2
75/80
3500 – 4000
4
60
5330.5, 5346.5, 5366.5, 5371.5 and 5403.5
5 memory locations
40
7000 – 7300
7
30
10100 – 10150
10
20
14000 – 14350
14
17
18068 – 18168
18
15
21000 – 21450
21
12
24890 – 24990
25
10
28000 – 29700
28
Table 1. Antenna Memory Resolution.
The memory resolution for non-amateur frequency bands between 160 and 10 meters is approximately
0.2 percent of the lower frequency of that band. There are over 2500 memory locations for each of the
four memory banks (A-D). This provides memory for up to four different antennas. Default is memory
bank A. Press both [TUNE] and [C-DN] buttons simultaneously to cycle the memory banks A, B, C and
D (Forward Power meter needle reads 10, 20, 30 and 40 watts, respectively).
Note: Pressing [TUNE], [C-DN] and [L-DN] buttons simultaneously overwrites the tuner memory
with the current tuner setting; settings with SWR greater than 3.0 will not be stored.
To clear the antenna memory, turn off the power to the tuner. Then press and hold both [TUNE] and [C-
DN] buttons while turning on the power. Both meter needles will read half scale, forming a triangle,
asking you to confirm the deletion. Press [C-UP] to confirm delete (both meter needles will read full
scale), or press [L-UP] to cancel the antenna memory delete (both meter needles will read zero).
“Total Reset” erases the antenna memory
and
returns all tuner settings to their factory default states. To
achieve this, turn power off, press and hold [TUNE], [L-DN] and [C-DN] while turning on the power.
Both meter needles will read half scale. Press [C-UP] to confirm total reset (needles go to full scale) or
press [L-UP] to cancel total reset (needles go to zero).
Meter Range
You can select a meter scale range or use auto range. In the 300 watts (low) range, forward full scale is
300 watts and the reflected full scale is 60 watts. In the 3000 watts (high) range, the forward full scale is
3000 watts and the reflected full scale is 600 watts (multiply the meter reading by 10). Auto range
automatically sets the meter scales 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. Default is the 3000-watt range.
Press both [TUNE] and [L-DN] buttons simultaneously to cycle the meter range among 300 watts, 3000
watts and auto range (Forward Power meter needle reads 30, 300 and 100 watts, respectively).
