MFJ-969_Manual操作说明书手册

MFJ-969 DELUXE Versa Tuner IIMFJ-969 Versa Tuner IIInstruction ManualGeneral InformationThe MFJ-969 is a 300 watt RF output power antenna tuner that will match any transmitteror transceiver to virtually any antenna.Peak or average forward and reflected power andSWR can be read on the illuminated cross-needle meter.The MFJ-969 uses a "T"matching network and covers all bands between 160 and 6 meters.This network will tune dipoles,inverted-vees,verticals,mobile whips,beams,randomwires,and many other antennas.The MFJ-969 has rear panel connectors for coaxial,singlewire or two wire feedlines.A built-in 4:1 balun allows the use of balanced open wire,twinlead,or twin-axial feedlines.An internal eight position antenna-selector switch selects a built-in 50 ohm dummy load,two separate coaxial line outputs,or a single wire line-balanced line output.All of thesefunctions can be selected in tuned(with tuner's "T"network in line)or bypassed (no tuningcircuit)configurations.Peak Reading SWR/WattmeterThe illuminated cross-needle meter measures the peak or average FORWARD power,REFLECTED power,and SWR.The wattmeter is active in all ANTENNA SELECTORpositions.To use the wattmeter without using the MFJ-969 tuning circuits select one ofthe ANTENNA SELECTOR positions under BYPASS.NOTE:The meter ON/OFF switch must be ON for the meter circuit to function.TheMFJ-969 wattmeter circuit does not function accurately if the Auto Tuner inyour radio is used.To disable the meter,turn the meter ON/OFF switch to theOFF position.Set the ANTENNA SELECTOR switch to one of the bypasspositions when using the Auto Tuner in your radio.Peak envelope power(PEP)is measured when the PEAK or AVERAGE METER pushbutton (right-hand side)in placed in the PEAK (in)position.Peak power and averagepower values are equal with steady unmodulated carriers,FSK,or FM.The PEP power istwice the average power with SSB two tone test modulation.PEP power may be anyamount larger than the average power with SSB voice signals.The metering circuit in this unit provides very accurate forward peak power readingsduring with any form of modulation.Either an internal 9 volt battery for portableoperation,or an extemal supply can be used to power the peak detector.Current demand isvery low,and the 9 volt battery will last its'shelf life.