Yaesu FTA-750L Spirit Operating Manual page 24

Adjusting the volume
 Rotate the VOL (inner)
knob to set the volume
level. If no signal is
present, press the SQL
s w i t c h ; b a c k g r o u n d
noise will now be heard,
and you may use this
noise to set the VOL
kno b for th e desir e d
audio level. Press and
hold the SQL switch
to silence the noise and
resume normal (quiet)
monitoring.
22
Basic Operation
Adjusting the squelch
 Press the SQL switch,
then rotate the DIAL
selector knob to set the
squelch threshold (0 to
15) so that the receiver
is just silenced. A higher
number indicates that
PTT
a higher signal level is
required in order to open
the squelch.
SQL
 Press and hold the SQL switch to set the squelch
threshold to 0 (off).
 Your new setting will be saved each time you per-
form either of the operations above.
PTT
SQL
BUSY
127.300
SQL