FrontRow Pro Digital, Руководство по установке

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11
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.
e. AVOID routing the sensor cable next to other cables or electrical systems (e.g., other electrical
conduit, Ethernet cable, video cable, fluorescent light ballast, etc.). Leave at least 6 in. (15cm)
space around the sensor cable.
f. The sensor cable is UL listed. 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 the speaker wires as far as practical. We recommend
leaving at least 6 in. (15cm) between the two whenever possible.
Possible external sensor combinations:
sensor combinations maximum connections
ceiling sensor only 2*
wall sensor(s) only 3
ceiling & wall sensor 1 ceiling sensor, 2 wall sensors
*1 ceiling sensor can be connected to the wall sensor port.
Step 4:
Plan your installation (Sensors)
(If you are using IR-Speakers, skip to section 7)
Your FrontRow Pro Digital receiver has a powerful built-in sensor -- often sufficient to serve your entire classroom.
The walls or design of some classrooms may not allow for the direct transmission and reflections of infrared
light that your active learning system relies on. That’s why it’s a good idea to plan for external sensors.
Sensor symbols:
= ceiling sensor = wall sensor
Interference and IR Coverage
The FrontRow Pro Digital system uses infrared light to transmit the voice signal from the microphone to the
sensor in the ceiling/wall sensors. Proper placement of the sensors is critical for optimal system performance.
a. Adjacent classrooms that use FrontRow infrared systems can interfere with each other if the rooms are
separated by windows. The windows allow the infrared light to “escape” from the classroom only to be picked
up by the sensors in the adjacent classroom, causing interference and “cross talk”. Be sure to recommend
window coverings to the greatest extent practical when using the system.
b. Direct sunlight can reduce system performance. Be sure to recommend window coverings to the greatest
extend practical when using the system.
c. Infrared light has better reflection off of white and glossy surfaces. The ceiling sensor can be placed to help
provide coverage in areas where the signal may be weak due to insufficient infrared reflection.