Alinco DX-801 Manuel d'instructions télécharger pdf (Page 7)

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

The Basics

Introduction

The MFJ-925 IntelliTuner

lets you rapidly tune any unbalanced or single-wire antenna automatically.

MFJ's exclusive InstantRecall

, IntelliTune

and AdaptiveSearch

algorithms give you fast automatic

tuning with more than 20,000 non-volatile VirtualAntenna

memories. The antenna has eight banks of

memory; with over 2500 non-volatile memories for tuner settings.

The tuner includes a highly efficient switching L-network with wide matching capability, 1.8 to 30 MHz

coverage, a radio interface port, and heavy-duty 10 amp/1000 volt relays. It is rated at 200 watts

SSB/CW.

A maximum of 256 values of inductance and 256 values of capacitance are available. With the

capacitance switched between the input and output side, this provides a total of 131,072 L/C tuning

combinations. The nominal tuning ranges are 0 to 24 μH and 0 to 3900 pF.

The MFJ-925 IntelliTuner

learns and remembers. When you transmit, it automatically adjusts for

minimum SWR and remembers the frequency and tuner settings, safely stored in non-volatile memory.

The next time you operate on that frequency (or close to it) and antenna, the tuner settings are instantly

restored and you’re ready to operate in milliseconds. The antenna has four banks of memory, which can

learn and remember more than 2500 frequencies and tuner settings.

When you key your transmitter, MFJ’s InstantRecall

checks its memory to see if you have operated on

that frequency before. If so, tuning is instantaneous and you’re ready to operate. If not, MFJ’s

IntelliTune

algorithm (based on MFJ’s famous SWR Analyzer technology) kicks in. It measures the

complex impedance of your antenna. Next, it calculates the components it needs and instantly snaps them

in. Finally, it fine-tunes to minimize SWR, and you’re ready to operate – typically in a fraction of a

second.

If the antenna impedance is not within the tuner’s measurement range, MFJ’s AdaptiveSearch

algorithm goes into action. Frequency is measured and relevant components values are determined. Only

those values are searched for fast tuning. If it still cannot find a match, the search is performed again

using a different search pattern.

The minimum power to tune is approximately two watts, with maximum SWR tuning accuracy occurring

at tuning power levels of 10-20 watts.

Like all MFJ’s IntelliTuners

, the MFJ-925 supports radio tuner interfaces that are compatible with

Alinco EDX-2 tuner, Icom AH-3 and AH-4 tuners, Kenwood AT-300 tuner, Yaesu FC-30 tuner, and

Yaesu FH-1 and FH-2 remote controls. Optional interface cables MFJ-5114A (for Alinco), MFJ-5114I

(for Icom), MFJ-5114K (for Kenwood); and MFJ-5114Y/Y3/Y4 (for Yaesu) are available from MFJ

Enterprises, Inc.

The MFJ-925 tuner enters a “sleep” mode when idle and when no transmit signal is present, turning off

the microprocessor clock to avoid the generation of spurious signals.

1 2 3 4 5 6 7 8 9 10 11 12 ... 39 40

Commentaires sur ces manuels

Pas de commentaire

Alinco DX-801 Manuel d'instructions Page 7

Commentaires sur ces manuels