Yaesu FT-950 Operating Manual page 25

F
RONT
[ R.FLT ] ( R
F
OOFING ILTER
This button selects the bandwidth of the receiver first
IF Roofing Filter. Available selections are 3 kHz, 6
kHz, 15 kHz, or Auto. The selected bandwidth appears
in the FLT column of the Block Diagram Display on
the display.
A :
DVICE
Because the roofing filter is in the first IF, the protec-
tion it provides against interference is quite significant.
When set to AUTO, SSB bandwidth is 6 kHz, CW is 3
kHz, FM and RTTY are 15 kHz. On a crowded SSB
band, however, you may wish to select the 3 kHz filter,
for the maximum possible interference rejection.
[ NB ] Switch
This button turns the IF Noise Blanker on and off.
Press this button momentarily to reduce short-duration
pulse noise; the " " icon will appear in the display.
Press and hold this button in for one second to reduce
longer-duration man-made pulse noises; the "
icon will blink for three seconds, then will appear con-
tinuously in the display.
Press this button again to disable the noise blanker;
the " " icon will disappear.
[ AF GAIN ] [ RF GAIN ] Knobs
[ AF GAIN ] Knob
The inner [ AF GAIN ] knob sets the receiver's audio
volume level. Typically, you will operate with this con-
trol set between the 9 o'clock and 10 o'clock posi-
tions.
[ RF GAIN ] Knob
The outer [ RF GAIN ] knob is the receiver's RF gain
control, which adjusts the gain of the receiver's RF
and IF amplifier stages. This control is normally left in
the fully clockwise position.
[ RX CLAR ] Switch
Pressing this button activates the RX Clarifier. This
will allow you to temporarily adjust the receiving fre-
quency up to ±9.99 kHz with the [ CLAR/VFO-B ]
knob. Press this button once more to return the receiver
to the original frequency; the Clarifier offset will be
remembered, in case you want to use it again. To can-
cel the Clarifier offset, press the [ CLEAR ] button.
[ TX CLAR ] Switch
Pressing this button activates the TX Clarifier, to al-
low offsetting the transmit frequency temporarily. Press
this button once more to return the transmitter to the
original frequency; the Clarifier offset will be remem-
bered, though, in case you want to use it again. To can-
cel the Clarifier offset, press the [ CLEAR ] button.
[ CLEAR ] Switch
Pressing this button clears out any frequency offset you
have programmed into the Clarifier register (thereby
setting the offset to "Zero").
FT-950 O
PERATING
P
ANEL
) Switch
M
ANUAL
C
ONTROLS
[( VFO-B ) RX ] Indicator/Switch
This button switches the receiving frequency to VFO-
B, the green LED imbedded within the button will light
up. Pressing this button again will return the receiving
frequency to VFO-A, and the imbedded green LED
will turn off.
[( VFO-B ) TX ] Indicator/Switch
This button transfers control of the transmit frequency/
mode to VFO-B, and the red LED in the button will
light up. Pressing this button again will transfer fre-
quency/mode control back to the VFO-A side, and the
red LED imbedded within this button will turn off.
[ BAND ] Switch
Pressing this button allows you to select the operating
band (Amateur bands) by turning the [ CLAR/VFO-
B ] knob.
[ GRP ] Switch
"
Pressing this button allows you to select the memory
group by turning the [ CLAR/VFO-B ] knob.
[ MHz ] Switch
Pressing this button allows you to tune the VFO fre-
quency down or up in 1 MHz increments, using the
[ CLAR/VFO-B ] knob.
[ CLAR/VFO-B ] Knob
This knob usually tunes the Clarifier offset frequency
up to ±9.99 kHz. Additionally, it is used to adjust the
functions selected with five buttons located around the
knob.
F
UNCTION
S
WITCH
[( VFO-B ) RX ]
[ BAND ]
[ GRP ]
[ MHz ]
[ MCH ]
[ MCH ] Switch
Pressing this button allows you to select the memory
channel using the [ CLAR/VFO-B ] knob.
& S
WITCHES
E
FFECT
Rotate the [ CLAR/VFO-B ] knob to adjust
the VFO-B frequency, in the same step as
the Main Tuning Dial knob. The Frequency
Display will be changed to show the VFO-
B frequency.
Rotate the [ CLAR/VFO-B ] knob to change
the amateur band selection.
Rotate the [ CLAR/VFO-B ] knob to select
the memory group.
Rotate the [ CLAR/VFO-B ] knob to tune the
VFO frequency in 1 MHz step.
Rotate the [ CLAR/VFO-B ] knob to select
the memory channel.
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