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2N TELEKOMUNIKACE a.s., www.2n.cz
Mounting Drawing for 40 mm Speaker Installation
If you use other than the prescribed screws, make sure that the isolation distance
between the electronics and substandard fitting elements is 2 mm at least. Make sure
that the panel is fitted perfectly to avoid resonance during operation. There may be no
gap between the lift button panel and
or the gap must be sealed properly to
2N
Lift1
®
eliminate acoustic fault of the speaker and acoustic feedback between the speaker and
microphone (see below).
Off-Panel Microphone Mounting
By default, the microphone is mounted directly on the printed circuit (see the drawing
for its position). If required, the microphone can be supplied with a cable mounted on a
25×25 mm holder with self-adhesive foil. This allows you to mount the microphone
behind any lift button panel hole of the minimum diameter of 3 mm or a group of holes
of the same total area. The
microphone is on the board, but an external
2N Lift1
®
microphone can be connected via a connector. Switching to an external microphone is
automatic (its connection is detected).
The minimum centre-to-centre distance between the speaker and microphone
. A shorter distance may result in acoustic feedback. A longer distance does
is 90 mm
not matter.
Caution
Make sure that microphone hole is sealed properly to record only sounds
from the cabin instead of the noise from the shaft or space behind the
panel.
