Bedienungsanleitung Yaesu FT-DX9000 (Seite 23 von 156) (Englisch)

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Page 21FT DX 9000D OPERATION MANUAL

FRONT PANEL CONTROLS

KEY Jack

This 1/4-inch, 3-contact jack accepts a CW key or

keyer paddles (for the built-in electronic keyer), or

output from an external electronic keyer. Pinout is

shown on page 16. Key up voltage is 5 V, and key

down current is 1 mA. This jack may be configured

for keyer, “Bug,” “straight key,” or computer keying

interface operation via Menu Selection “MODE-CW

041 F-KEYER TYPE (see page 135).” There is an-

other jack with the same name on the rear panel, and

it may be configured independently for Internal Keyer

or pseudo-straight-key operation.

Note

You cannot use a 2-contact plug in this jack (to do so

produces a constant “key down” condition).

Cannon (“XLR”) Microphone Connector

This Cannon-type (XLR) connector accepts input from

the Microphone or other XLR-equipped microphone

system. MIC connector pinout is shown on page 15.

Proper microphone input impedance is 500 ~ 600

Ohms.

If you are using a condenser microphone requiring 48

Volts DC, you may enable this voltage to appear on

the microphone line; see page 81. When the 48-volt

supply line has been enabled, the LED adjacent to the

MIC jack will glow red.

To disconnect the microphone plug, draw out the mi-

crophone plug while pressing and holding in the sil-

ver push-button.

IPO

(Intercept Point Optimization)

Switch

The IPO(A) Lamp-button may be used to set the

optimum receiver front end characteristics of the main

receiver circuit for a very strong-signal environment.

Selecting IPO bypasses the front end RF amplifier and

feeds the received signals directly to the first mixer of

the main band (VFO-A) receiver circuit. While the

IPO feature is activated, this button will remain illu-

minated.

The IPO(B) Lamp-button, similarly, allows direct

feed of the received signals to the first mixer of the

sub band (VFO-B) receiver circuit. While the IPO

feature is activated on the sub receiver, this button

will be lit.

Advice

The FT DX 9000D’s first mixer is an active type, using

four SST310 Junction FETs. This mixer design pro-

vides gain to the receiver chain, so the noise figure of

the receiver is fundamentally lower than with some

other designs. Therefore, it frequently is not neces-

sary to utilize the RF preamplifier, and the receiver

Intercept Point will be substantially increased by en-

gaging IPO, so as to feed the incoming signals directly

to the first (active) mixer. We recommend that IPO be

switched on whenever possible.

ANTENNA SELECT Switches

These momentary buttons select the antenna jack on

the rear panel, with the selection indicated by the LED

in each button. When an antenna has been selected

for operation on the main band (VFO-A), the LED in

the button glows red. When an antenna has been se-

lected for operation on the sub band (VFO-B), the

LED in the button glows umber.

TUNE Switch

This is the on/off switch for the FT DX 9000D’s Auto-

matic Antenna Tuner.

Pressing this button momentarily places the antenna

tuner in line between the transmitter final amplifier

and the antenna jack (the LED will become illumi-

nated). Reception is not affected.

Pressing and holding in this button for 1/2 second,

while receiving in an amateur band, activates the trans-

mitter for a few seconds while the automatic antenna

tuner rematches the antenna system impedance for

minimum SWR. The resulting setting is automatically

stored in one of the antenna tuner’s 100 memories,

for instant automatic recall later when the receiver is

tuned near the same frequency.

Pressing this button momentarily, while the Tuner is

engaged, will take the Automatic Antenna tuner out of

the transmit line.

Note

When the Automatic Antenna tuner is tuning itself, a

signal is being transmitted. Therefore, be absolutely

certain that an antenna or dummy load is connected to

the selected antenna jack before pressing and holding

in the TUNE button to start antenna tuning.

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Yaesu FT-DX9000 Seite 23

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