Chapter 4 Plan Your Sensor Installation - FrontRow symbio 5201R Installer's Manual

4
Plan Your Sensor Installation
(Skip this section if FrontRow IR speakers have been installed previously)
SENSOR & SENSOR CABLE
The sensor and sensor cable are critical elements in the system and the most
sensitive to electrical noise.
a. DO NOT shorten OR lengthen the sensor cable. Its factory-specified length is
critical to the performance of the system.
b. DO NOT use a splitter with the sensor cable.
c. DO NOT use a different cable.
d. DO NOT alter the RCA connectors on the cable.
AVOID routing the sensor cable next to other cables or electrical systems (e.g.,
e.
other electrical conduit, Ethernet cable, video cable, fluorescent light ballast, etc.).
Leave at least 6 in. (15cm) space around the sensor cable.
f. Excess cable can be coiled, tied and placed safely in a plenum space. DO NOT
place the sensor coil near other cables or electrical systems (e.g., other electrical
conduit, Ethernet cable, video cable, fluorescent light ballast, etc.).
g. Route the sensor cable AWAY from speaker wires as far as practical. We
recommend leaving at least 6 in. (15cm) between the two whenever possible.
h. Local regulations may require plenum-rated cable if used in a plenum space.
Sensor cable supplied with your system is plenum rated.
Sensor Mounting
Assessing the individual characteristics of the environment is critical to achieving the
best performance. Poor coverage planning can dramatically reduce the performance
of the system.
a. DO NOT mount the ceiling sensor or wall sensors in direct sunlight as it will greatly
reduce performance.
b. The ceiling sensor must have a clear view of the coverage area and must be
mounted parallel to the floor to function optimally (figure 1). If drop lights are used
in the room, wall sensors may be a better option. Or, a drop mount* may be used to
lower the ceiling sensor.
*
not supplied by FrontRow
*
Light
Fixture
Ceiling Sensor
Orientation and coverage
optimized
Classroom
Figure 1: Ceiling Sensor Installation
X Sensor performance reduced: Not parallel
to floor AND blocked by light fixtures.
Ceiling
Sensor
Sensor cable
Receiver
Amplifier
9