Yaesu FT-991 Operating Manual page 33

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asic
Here is the typical start-up procedure for normal operation:
ON/OFF Switch
1. Turn on the external DC power supply.
2. Press and hold in the front-panel ON/OFF switch
until the transceiver turns on.
3. The transceiver will start up on 7.000.00 MHz LSB,
(or the previously used operating frequency) and
normal operation may begin.
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To turn power off, press and hold in the front panel
ON/OFF switch for one second.
4. Rotate the AF GAIN knob to set a comfortable au-
dio level of the incoming signals or noise. Clockwise
rotation of the AF GAIN knob increases the volume
level.
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When using headphones, start by rotating the AF
GAIN knob counter-clockwise, then bring the vol-
ume level up after you put the headphones on. This
will minimize the chance of damage to your hearing
caused by an unexpectedly high audio level.
5. Press the BAND button to display the list of Amateur
bands on the LCD, then touch a key corresponding
to the band on which you wish to begin operation.
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 One-touch selection of each Amateur band be-
tween 1.8 and 50 MHz, 144 MHz, and 430 MHz
is provided.
 The FT-991 utilizes a triple band-stack VFO
selection technique, which permits storing up to
three favorite frequencies and modes onto each
VFO band register. For example, you may store
one frequency each on 14 MHz CW, RTTY, and
USB, then recall these frequencies by successive,
momentary touches of the [ 14 ] on the screen
displayed by pressing the BAND button. Each
Amateur band key may similarly have up to three
frequency/mode settings applied.
FT-991 O
peraTing
o
peration
BAND Button
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anual
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eceivinG on
MODE Button Main Tuning Dial Knob
6. Press the MODE button to display the available se-
lections.
Touch the corresponding key to select the desired
operating mode.
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 By convention in the Amateur bands, LSB is
used on the 7 MHz and lower bands (with the
exception of 60 meters), while USB is utilized on
the 14 MHz and higher bands.
 When changing modes from SSB to CW, you
will observe a frequency shift on the display.
This shift represents the BFO offset between the
"zero beat" frequency and the audible CW pitch
(tone) you can hear (the pitch is programmed via
the Menu item "059 CW FREQ DISPLAY"), even
though the actual tone that you hear is not chang-
ing.
 To eliminate noise while the transceiver is not re-
ceiving any signal, press the F(M-LIST) button,
then touch [SQL] on the LCD. "SQL" will ap-
pear on the LCD and the MULTI knob will func-
tion as the squelch knob. Rotate the MULTI knob
to adjust the squelch until the noise disappears.
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Mateur anDs
AF GAIN Knob
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