MFJ MFJ-925, Инструкция по эксплуатации

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MFJ-925 Super-Compact IntelliTuner Automatic Antenna Tuner Instruction Manual
©
2006 MFJ Enterprises, Inc.
4
Front Panel
MODEL
MFJ-925
AUTOMATIC ANTENNA TUNER
200 Watts SSB / CW
MFJ IntelliTuner
TM
POWER ALT TUNE
SWR TUNE
Figure 2. MFJ-925 Front Panel.
•
SWR LED:
A green LED that illuminates when the SWR is 1.5 or less.
•
TUNE LED:
A red LED that illuminates when the automatic tuning is in progress.
•
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. One beep indicates
bypass mode, where RF from the transmitter goes directly to the antenna with no matching. A second
quick press toggles the tuner back to its last L/C setting, and the tuner responds with two beeps.
Press and hold [TUNE] for 0.5 to 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
of 1.5, pressing [TUNE] will fine-tune the match for a lower SWR, if possible. When the automatic
tuning is completed, a series of beeps indicates the tuned SWR where one beep indicates SWR of 1.5
or less, two beeps indicate SWR of 1.6 to 2.0, three beeps indicate SWR of 2.1 to 2.5, and four beeps
indicate SWR of 2.6 to 3.0. For SWR above 3.0, “SWR” (di-di-dit di-dah-dah di-dah-dit) will be sent
on CW.
“
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. To
toggle the
StickyTune
mode on and off, press and hold the [TUNE] button for two seconds. One beep
indicates on and two beeps indicate off. When 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.
Automatic/Semi-Automatic Tuning Mode
Pressing [TUNE] and [ALT] simultaneously toggles between automatic and semi-automatic tuning
mode. One beep indicates automatic mode and two beeps indicate semi-automatic mode. In
automatic mode, the tuning routine is automatically started when at least two watts of power is
applied and the SWR is greater than 2.5. In semi-automatic mode, the tuning routine starts only when
the [TUNE] button is pressed for 0.5 to 2 seconds.
Note: During the tuning process, the tuner will make some noise. These are the relays
switching at a very fast pace and it is normal operation. Do not be alarmed.