Yaesu FTDX9000MP Operation Manual page 25

VOX DELAY Knobs
VOX Knob
The inner [ VOX ] knob sets the gain of the VOX cir-
cuit, to set the level of microphone audio needed to
activate the transmitter during voice operation while
the [ VOX ] switch is engaged. The [ VOX ] switch (#
described previously) must be switched On to engage
the VOX circuit.
DELAY Knob
The outer [ DELAY ] knob sets the hang time of the
VOX circuit, between the moment you stop speaking,
and the automatic switch from transmit back to re-
ceive. Adjust this for smooth VOX operation, so the
receiver is only activated when your transmission is
ended and you wish to receive.
For CW operation, you can adjust the keying delay
separately; see control #
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D D D D D VICE VICE VICE
VICE VICE
The Sub band (VFO-B) frequency display will show
the hang time of the VOX circuit for 5 seconds when-
ever the inner [ DELAY ] knob is turned.
You may disable this feature (displaying the hang time
of the VOX circuit) via Menu item "DISPLAY 022
LEVEL INDICATOR." See page148 for details.
KEYER Switch
This button toggles the internal CW keyer on and off.
While activated, the LED in this button glows red.
The Keyer sending speed, and the CW Hang Time are
adjusted via the controls described in the enxt sec-
tion.
SPEED CW DELAY Knobs
The internal Electronic Keyer is activated by the
[ KEYER ] switch, described in the previous section.
SPEED Knob
The inner [ SPEED ] knob adjusts the keying speed of
the internal CW keyer. Clockwise rotation increases
the sending speed.
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The Sub band (VFO-B) frequency display will show
the keying speed for 5 seconds whenever the inner
[ SPEED ] knob is turned.
You may disable this feature (displaying the keying
speed) via Menu item "DISPLAY 022 LEVEL IN-
DICATOR." See page 148 for details.
CW DELAY Knob
This outer [ CW DELAY ] knob sets the hang time of
the CW "VOX" circuit, between the moment you stop
sending, and the automatic switch from transmit back
to receive during "Semi-break-in" operation. Adjust
this just long enough to prevent the receiver from be-
ing restored during word spaces at your preferred send-
ing speed. Clockwise rotation increases the hang time.
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VICE
The Sub band (VFO-B) frequency display will show
the hang time of the CW "VOX" circuit for 5 seconds
whenever the outer [ CW DELAY ] knob is turned.
You may disable this feature (displaying the hang time
of the CW "VOX" circuit) via Menu item "DISPLAY
022 LEVEL INDICATOR." See page 148 for de-
tails.
FT 9000MP O
DX PERATION
,
below.
M
ANUAL
F F F F F P P P P P
R R R R R ONT ONT ONT ONT ANEL ANEL ANEL
ONT ANEL ANEL
N N N N N
:
O O O O O TE TE TE
TE TE
The SSB VOX hang time is adjusted via the [ DE-
LAY ] control (#
, described previously).
BK-IN/SPOT Switches
This button turns the full break-in (QSK) CW capa-
bility on and off. While QSK is activated, the LED in
this button glows red.
The [ BK-IN/SPOT ] button turns on the CW receiver
spotting tone; by matching the SPOT tone to that of
the incoming CW signal (precisely the same pitch),
you will be "zero beating" your transmitted signal on
to the frequency of the other station.
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The Sub (VFO-B) band frequency display will indi-
cate the offset tone frequency when this switch is
pressed.
NB/SQL Knobs
NB Knob
The inner [ NB ] knob adjusts the noise blanking level
when the (analog) IF noise blanker is activated by
pressing the [ NB ] button. The Noise Blanker is acti-
vated via the [ NB ] button, described in the next sec-
tion.
SQL Knob
The outer [ SQL ] knob sets the signal level threshold
at which main (VFO-A) receiver audio is muted, in
all modes. It is very useful during local rag-chews, to
eliminate noise between incoming transmissions. This
control is normally kept fully counter-clockwise (off),
except when scanning and during FM operation.
NB Switch
Pressing this button activates the (analog) IF Noise
Blanker, which may help reduce many different types
of man-made impulse noise (but not atmospherics).
When the Noise Blanker is activated, the LED inside
the button will glow red. Adjustment of the Noise
Blanker level is accomplished via the NB knob, de-
scribed in the previous section.
D.NOTCH Switch
This button turns the Main band (VFO-A) Digital
Notch Filter on and off. When the Digital Notch Fil-
ter is activated, the LED indicator will glow red. This
is an automatic circuit, and there is no adjustment knob
for the Digital Notch Filter.
ROOFING Switch
This button selects the bandwidth for the Main band
(VFO-A) receiver's first IF Roofing Filter. Available
selections are 3 kHz, 6 kHz, 15 kHz, or Auto, and the
LED indicator will change according to the bandwidth
selected.
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:
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VICE VICE
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.
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ONTR OLS ONTR ONTR OLS OLS OLS
ONTR ONTR OLS
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