Mark Levinson 31 Manual page 23

Placement
PRECAUTION
About IR communication
7. Turn the Nº31 upright.
To keep interconnect cabling as short as possible, place the Nº31
as close as possible to your digital processor. You may place it on
a shelf or in a cabinet where it's convenient to operate.
The Nº31 should rest on a level, stable surface. Avoid placing it
where it'll be exposed to shocks or vibration (such as on an
unstable table or near large loudspeakers). In general, place it as
you would a turntable.
You should also place other associated equipment so that it
doesn't induce hum in the Nº31 and other sensitive components.
Interfering with the Nº31's ventilation or that of another
component could cause either to overheat, resulting in
damage to your system. To allow heat dissipation through air
circulation, allow 3 to 4 inches of clearance above the vents
on the top of the Nº31. Never block the vents on the bottom of
the Nº31.
To help with special installations and custom cabinetry, drawings
are included in this manual. (See "Dimensions").
The Remote Control sends infrared (IR) commands through its
projection lens, and the Nº31 receives IR commands through its
Remote sensor window. (See "Display").
IR communication between the Remote Control and the Nº31 will
be affected by:
Direct sunlight
Interior lighting
Wall, window, ceiling, and floor treatments
The angle of the Remote Control relative to the Nº31
30 feet or less
30˚ 30˚
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