Yaesu FT DX 9000 CONTEST - MANUAL 2 Operation Manual page 26

F P
RONT ANEL
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 item "MODE-CW 041
F-KEYER TYPE" (see page 120). There is another
jack with the same name on the rear panel, and it may
be configured independently for Internal Keyer or
pseudo-straight-key operation.
Note
This Key jack is connected in parallel with the jack
with the same name on the front panel.
You cannot use a 2-contact plug in this jack (to do so
produces a constant "key down" condition).
PHONES Jack
A 1/4-inch, 3-contact jack accepts either monaural or
stereo headphones with 2- or 3-contact plugs. When a
plug is inserted, the loudspeaker is disabled. With ste-
reo headphones such as the optional YH-77STA, you
can monitor both VFO-A and VFO-B channels at the
same time during Dual Receive operation.
Note
This Phones jack is connected in parallel with the jack
with the same name on the front panel.
When wearing headphones, we recommend that you turn
the AF Gain levels down to their lowest settings before
turning power on, to minimize the impact on your hear-
ing caused by audio "pops" during switch-on.
Page 24
C
ONTROLS
FT
DX
ROOFING Switch
This button selects the bandwidth for the VFO-A
receiver's first IF Roofing Filter. Available selections
are 3 kHz, 6 kHz, 15 kHz, or Auto, and the LED indi-
cator will change according to the bandwidth selected.
Advice
Because the roofing filter is in the first IF, the protec-
tion it provides against interference is quite signifi-
cant. When set to AUTO, the SSB bandwidth is 6 kHz,
while CW is 3 kHz and FM/RTTY are 15 kHz. On a
crowded SSB band, however, you may wish to select
the 3 kHz filter, for the maximum possible interfer-
ence rejection.
D.NOTCH Switch
This button turns the VFO-A Digital Notch Filter on
and off. When the Digital Notch Filter is activated,
the LED indicator will glow red. This is an automatic
circuit, and there is no adjustment knob for the
D.NOTCH.
MODE Switches
A, B Button
Pressing the A or B switch will illuminate the
respective indicator imbedded within the switch, al-
lowing adjustment of the operating mode on the VFO-
A or VFO-B. Pressing the A switch causes the indi-
cator to glow Red, signifying VFO-A is being adjusted.
Similarly, pressing the B switch will cause its indi-
cator to glow Orange, signifying VFO-B adjustment.
Advice
When changing bands, be sure to press the A or
B switch first, then press the appropriate Band se-
lector switch, so as to change operating frequencies
on the proper (VFO-A or VFO-B).
9000 C O
ONTEST
M
PERATION ANUAL