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Yaesu FT-950 Manual

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Page 19FT-950 OPERATING MANUAL
FRONT PANEL CONTROLS & SWITCHES
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
15. Key up voltage is +3.3 V DC, and key down current
is 0.3 mA. This jack may be configured for keyer, “Bug”,
“straight key”, or computer keying interface operation
via Menu item “037 A1A F-TYPE” (see page 111).
There is another jack with the same name on the rear
panel, and it may be configured independently for In-
ternal 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).
[
MONI
]
Knob
This knob adjusts the audio level of the transmit moni-
tor during transmission, when activated by the
[
MONI
]
button.
[
SQL
]
Knob
This knob sets the signal level threshold, below which
the receiver audio is muted, in all modes. It is very
useful during local rag-chews, to eliminate noise be-
tween incoming transmissions. This control is normally
kept fully counter-clockwise (off), except when scan-
ning and during FM operation.
[
SHIFT
]
Switch
Pressing this button allows you to move the IF DSP Band-
width higher or lower, using the
[
SELECT
]
knob. While
activated, the LED inside this button glows orange.
[
NOTCH
]
Switch
Pressing this button allows you to adjust the center fre-
quency of the IF Notch filter using the
[
SELECT
]
knob. While activated, the LED inside this button glows
orange. Press the
[
SELECT
]
knob briefly to toggle
the IF Notch filter on/off.
[
WIDTH
]
Switch
Pressing this button allows you to adjust the overall band-
width of the IF DSP filter using the
[
SELECT
]
knob. While
activated, the LED inside this button glows orange.
[
µ-TUNE
]
Switch
Pressing this button allows you to adjust the center fre-
quency of the µ-Tuning filter passband using the
[
SE-
LECT
]
knob, when the optional RF µTuning Kit is
connected. While activated, the LED inside this but-
ton glows orange. Press the
[
SELECT
]
knob briefly
to toggle the µ-Tuning function on/off.
[
CONT
]
Switch
Pressing this button allows you to select the DSP Con-
tour filter response using the
[
SELECT
]
knob. While
activated, the LED inside this button glows orange.
Press the
[
SELECT
]
knob briefly to toggle the IF
Contour filter on/off.
Furthermore, in the CW mode, press and hold this but-
ton for 2 seconds to activate the APF (Audio Peak Fil-
ter) which provides a very narrow audio bandwidth.
The APF circuit is an automatic circuit, and there is no
adjustment knob for the APF.
[
CLEAR
]
Switch
Pressing this button will reset to factory default the
functions, which are selected with the five buttons at
the left of this button.
[
SELECT
]
Knob
This knob is used to adjust the status of the functions
selected by the five buttons located above the knob.
The
[
SELECT
]
knob is also used to select the Menu
item when the Menu mode is engaged.
Press and hold the
[
SELECT
]
knob for one second to
activate the optional Voice Memory feature for the SSB/
AM/FM modes, or the Contest Keyer for the CW mode.
See page 64 (Voice Memory feature) or page 78 (Con-
test Keyer) for details.
FUNCTION
SWITCH
[
SHIFT
]
[
WIDTH
]
[
CONT
]
[
NOTCH
]
[
µ-TUNE
]
EFFECT
Rotate the
[
SELECT
]
knob to move the pass-
band of the IF DSP filter by 20 Hz steps. The
total adjustment range is ±1 kHz. The position
of the passband can be observed on the dis-
play. Furthermore, the frequency display will
show the shift value of the IF SHIFT for 3 sec-
onds whenever the
[
SELECT
]
knob is turned.
Rotate the
[
SELECT
]
knob to set the overall
bandwidth of the IF DSP filter. Counter-clock-
wise rotation reduces the bandwidth, while
clockwise rotation increases the bandwidth.
The current bandwidth can be observed on the
display. Furthermore, the frequency display will
show the bandwidth of the IF passband for 3
seconds whenever the
[
SELECT
]
knob is
turned.
Press the
[
SELECT
]
knob to turn the CON-
TOUR filter on and off. Rotate the
[
SELECT
]
knob to adjust the CONTOUR filter response.
The peak position of the CONTOUR filter can
be observed on the display. Furthermore, the
frequency display will show the CONTOUR fre-
quency for 3 seconds whenever the
[
SELECT
]
knob is turned.
Press the
[
SELECT
]
knob to turn the IF NOTCH
filter on and off. Rotate the
[
SELECT
]
knob to
adjust the center frequency of the IF NOTCH
filter. The null position of the IF NOTCH filter
can be observed on the display. Furthermore,
the frequency display will show the center fre-
quency of the IF NOTCH filter for 3 seconds
whenever the
[
SELECT
]
knob is turned.
Press the
[
SELECT
]
knob to turn the optional
RF µTuning Kit on and off. Rotate the
[
SE-
LECT
]
knob to adjust the center frequency of
the µ-Tuning filter. The peak position of the µ-
Tuning filter can be observed on the Tuning
Offset Indicator field of the display.
If the
[
SELECT
]
knob is turned too slowly, the frequency
display may not show the value. This is to prevent undes-
ired display of the functions caused by noise or slight vi-
bration of the controls; however, the actual value will be
changed even if not displayed.
You can observe the fine adjustment for a few seconds
while the display is active.
While adjusting functions, the display may occasionally skip
one of the numbers in the sequence; this is due to “round-
ing” of the encoder steps in the ADC converter. Set the
values to your preference, they are unique to your radio
and may not directly correspond to other units.
… 21 …


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