MFJ IntelliTuner -994B, Инструкция по эксплуатации

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MFJ-994B IntelliTuner Automatic Antenna Tuner Instruction Manual
©
2004-2010 MFJ Enterprises, Inc.
5
Note: Pressing [C-UP] and [C-DN] simultaneously toggles the capacitor between the input
and output sides of the L-network. Forward needle bounces to the 30-watt mark when
the capacitor is on the transmitter side. Reflected needle bounces to the 5-watt mark
when the capacitor is on the antenna side.
•
L-UP and L-DN Buttons:
Used to manually increase or decrease the inductance of the L-network
matching circuit. The inductance range is 0 to 17 μ H. The upper limit of inductance, dependent on
frequency, is restricted to limit the maximum voltage and current across the tuner’s components.
Note: Pressing [C-DN] and [L-DN] simultaneously places the tuner in bypass mode. The
reflected meter needle momentarily bounces to the 20-watt mark to indicate this. RF
from the transmitter goes directly to the antenna with no matching.
•
AUTO Button:
Used to select automatic or semi-automatic tuning mode. Button
out
selects
automatic mode – the tuning routine is automatically started when 2-10 watts of power is applied and
the SWR is a preset amount above the preset target SWR. Button
in
selects the semi-automatic mode
– the tuning routine starts only when the [TUNE] button is pressed for 0.5-2 seconds.
Note: The AUTO button should always be IN (semi-automatic) unless a compatible radio
interface cable is connected between the MFJ-994B and your transceiver. This will ensure
that the MFJ-994B does not attempt tuning during high-power operation. This is especially
important when an HF power amplifier is in-line.
Note: If an amplifier is in-line, it should always be bypassed prior to tuning.
•
TUNE Button:
Has three different functions based on the length of time you press and hold it before
releasing. Press [TUNE] quickly (less than 0.5 second) to bypass the tuner. RF from the transmitter
goes directly to the antenna with no matching.
Press and hold [TUNE] for 0.5-2 seconds to start the automatic tuning process. The transmitter must
be keyed first with at least two watts of power. When the SWR is already below the target SWR,
pressing [TUNE] will fine-tune the match for a lower SWR if possible.
“
StickyTune
” allows for one-handed tuning operation. Normal tuning requires keying the transmitter
with one hand and using the other hand to push the [TUNE] button to start the tuning process unless a
transceiver interface cable is installed. When
StickyTune
is enabled, the tuning process starts
automatically when the transmitter is keyed with at least two watts of power regardless of the SWR.
This works in both automatic and semi-automatic modes. To toggle the
StickyTune
mode on and off,
press and hold the [TUNE] button for two seconds. The reflected power needle goes to 60-watt mark
when on and to 5-watt mark when off. Default is off.
Note: Sticky-Tune resets to OFF when the power is cycled or after tuning.
Note: “Sticky Tune” should only be used when a compatible radio interface cable is connected
between the MFJ-994B and your transceiver. This will ensure that the MFJ-994B does not
attempt tuning during high-power operation. This is especially important when an HF
power amplifier is also being used.
Note: If an amplifier is in-line, it should always be bypassed prior to tuning.