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PMB132-V, PMB132/12-V
4.4 Microphone sensitivity
When the station is close to the speakers, it is possible that acoustic feedback may occur, resulting in a hissing noise
from the loudspeakers (Larsen effect). To avoid this, it is necessary to lower the sensitivity of the microphone.
To set the sensitivity of the microphone,
press the ALERT and EVAC keys simultaneously and hold them down for more
than 3 seconds
. When the
RUN/SET
LED stops flashing and remains steady ON, release the keys.
Holding the
EVAC.
key down, press
AUX
to increase the sensitivity of the microphone or
P.T.T.
to decrease it.
The appropriate LEDs will flash to indicate that the adjustment is being made. Once the (minimum or maximum) limits
have been reached, the LEDs will remain steady ON. To leave the settings mode and save the changes made, press
the
ALERT
and
EVAC
keys again.
If you do NOT want to save the changes made, simply wait for the timeout (about 10
seconds), after which the previous settings will be restored.
4.3 P.T.T. Toggle
To set the
P.T.T.
key in the toggle mode,
press the ALERT, EVAC and RESET/ACK keys simultaneously and hold them
down for more than 3 seconds
. When the
RUN/SET L
ED stops flashing and remains steady ON, release the keys.
On pressing the
RESET/ACK
. key, the LEDs will show the current setting (
default factory setting: toggle
OFF
).
To change the status, hold the
RESET/ACK
. key down and press AUX (to activate the toggle mode) or the
P.T.T.
key (to
de-activate it). The LED’s corresponding to the modes are shown in the following table.
TOGGLE OFF
TOGGLE ON
To leave the settings mode and save the changes made, press the
ALERT
,
EVAC
and
RESET/ACK
keys again: the
RUN/SET
LED will start flashing again. If you do NOT want to save the changes made, simply wait for the timeout
(about 10 seconds), after which the previous settings will be restored.
