Alinco DX-801 Instruction Manual download pdf (Page 11)

MFJ-925 Super-Compact IntelliTuner Automatic Antenna Tuner Instruction Manual

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 automatic tuning process, the tuner will make some noise. These are the

relays switching at a very high rate and this is normal. Do not be alarmed.

• ALT Button: Has two different functions based on the length of time you press and hold it before

releasing. Press [ALT] quickly (less than one second) to select the primary memory bank to use.

Press button to toggle between Memory 1 and Memory 2. One beep indicates Memory 1 and two

beeps indicate Memory 2.

Press and hold [ALT] for one second to cycle among the four secondary memory banks of the current

primary memory selected. The selected bank is indicated by a series of short beeps, where one beep

indicates bank A, two beeps indicate bank B, three beeps indicate bank C, four beeps indicate bank D,

and five beeps indicate antenna memory is OFF. See “Antenna Memory” on page 11.

Pressing the [ALT] button will switch the antenna or bank only when there is no RF power; also, the

tuner setting for the selected antenna and bank, if available, is instantly restored from memory when

enabled.

• POWER Button: Used to turn the power on and off. When the power is off, the tuner is bypassed

(straight through from TRANSMITTER to ANTENNA). When power is turned on, the tuner powers

up bypassed, but will revert to the last stored matching values or begin tuning on application of RF

power when the [TUNE] button is pressed – or if Automatic or StickyTune is enabled.

WARNING: Do not turn the power on and off rapidly, otherwise the tuning setting

memory can be corrupted and the unit will have to be reset to factory defaults.

Note: When the tuner power is OFF, the tuner is bypassed and RF from the transmitter goes

directly to the antenna with no matching.

BUTTON ACTION

Press + to toggle between automatic and semi-automatic mode.

ALT

TUNE

POWER

Press less than 0.5 second to toggle bypass mode; press and hold for 0.5 to 2 seconds to start the

tuning process; press and hold for more than two seconds to toggle the StickyTune on and off.

Press less than one second to toggle between memory 1 and memory 2; press and hold for more

than one second to cycle through the 2 antenna memory banks.

Press in to turn power on, out to turn power off.

TUNE ALT

Figure 3. Button Action.

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Alinco DX-801 Instruction Manual Page 11