MFJ-993B IntelliTuner Automatic Antenna Tuner
Instruction Manual
2005-2012 MFJ Enterprises, Inc.
22
Meter Needle Stationary Codes
(Meter needles stay at the indicated mark until buttons are released.)
Forward
30 Watts Mark
100 Watts Mark
300 Watts Mark
[TUNE] + [L-DN]
30 Watts Meter Range
[1 beep]
Auto Range
[3 beeps]
300 Watts Meter Range
[2 beeps]
150 Watts Mark
300 Watts Mark
[TUNE] + [C-UP]
+ [L-UP]
Not Used
150 Watts Power Level
[1 beep]
300 Watts Power Level
[2 beeps]
10 Watts Mark
20 Watts Mark
30 Watts Mark
40 Watts Mark
[TUNE] + [C-DN]
Memory Bank A
[1 beep]
Memory Bank B
[2 beeps]
Memory Bank C
[3 beeps]
Memory Bank D
[4 beeps]
Reflected
5 Watts Mark
20 Watts Mark
60 Watts Mark
[TUNE] + [L-UP]
Auto Tune SWR +0.5
[1 beep]
Auto Tune SWR +1.0
[2 beeps]
Auto Tune SWR +1.5
[3 beeps]
[TUNE] 2 seconds
Sticky Tune Off
[2 beeps]
Not Used
Sticky Tune On
[1 beep]
Both Needles
Zero Scale
Mid Scale
Full Scale
[C-UP] (
YES
)
[L-UP] (
NO
)
No
CANCEL
[2 beeps]
Delete Confirmation?
DELETE ANTENNA
TOTAL RESET
Yes
DELETED
or
RESET
[1 beep]
[TUNE] + [C-DN]
+ [L-DN]
Not Used
Not Used
Memory Overwrite
[1 beep]
Needles Intersect at SWR 1.5
Needles Intersect at SWR 2.0
[TUNE] + [C-UP]
Target SWR 1.5
[1 beep]
Target SWR 2.0
[2 beeps]
Table 2. Meter Needle Stationary Codes.
If not enough power is applied for tuning (less than 2 watts), the display will flash
INCREASE POWER
three times and “QRO” (dah-dah-di-dah di-dah-dit dah-dah-dah) will be sent on CW. Increasing the input
power above two watts ends this message.
When input power is too high, the tuner enters a self-protection mode. The tuner will not allow any of its
relays to change. This feature is to prevent damage to your tuner.
If too much power is applied when tuning, the tuner will cease the tuning routine, flash
DECREASE
POWER
three times and send “QRP” (dah-dah-di-dah di-dah-dit di-dah-dah-dit) on CW. This occurs
when the forward power exceeds 75 watts and the SWR is greater than 3.0, or when the forward power
exceeds 125 watts regardless of the SWR.
If more than 300 watts (or more than150 watts when 150 watts power level is selected) is applied to the
tuner, the tuner will go into bypass mode, flash
OVERLOAD
three times and send “QRT” (dah-dah-di-dah
di-dah-dit dah) on CW.
If the tuning process is activated under these conditions, the tuner will not start the tuning. It will indicate
the appropriate bounce code on the meter and display a warning message on the LCD.
