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4. Checking for Interference to Infrared Transmissions
About Installation
· The effective range of the infrared transmissions varies depending on the color and material used for ceilings,
walls, and other things.
· Noise could be generated regardless of the effective range.
If this happens, you need to install the IRAs and IRDUs in suitable
locations.
· Do not place any obstacles around the IRDUs.
· Block sunlight with curtains or blinds so it does not shine directly on the
equipment.
· If you install IRAs on the ceiling, install them so they are at least 2 meters
away from windows and walls. (Refer to diagram on right.)
If you want to install them within 2 meters, contact our sales representative.
· Install IRAs at least 50 cm away from fluorescent lights.
· Implement the following measures in cases where there is a risk of static interference from audio equipment or TVs.
- The high-frequency currents that flow through power lines and load lines generate magnetic fields that may
affect nearby audio signal lines.
Measure A: Separate wires to the IRAs and wires to audio and TV antenna equipment (microphone cords,
etc.) by at least 1 meter from lighting control wires (load lines and power lines). (Refer to
diagram below.)
Measure B: Use separate conduits for the lighting control wires and audio equipment wires. (Refer to
diagram below.)
Measure C: Be sure to use D-type (type 3) ground connections for IRCU/IRCUDAN, lighting controls, and
audio controls.
- Implement sufficient precautions because simultaneous interpretation systems and medical equipment may be
affected by nearby lighting controls or lighting fixtures that are being controlled.
Lighting control
equipment
Audio
equipment
Separate by at least 5 m
Separate by at least 1 m
Power lines and load lines (in conduits)
Audio equipment wiring and wiring to IRAs (in conduits)
IRCU/
IRCUDAN
· If you install IRAs or IRDUs near the following sources that produce infrared light, they may cause the generation
of noise or malfunctions in the system.
Checkpoints
①
Interference from sunlight, lighting (incandescent lights, downlights,
halogen, etc.), plasma displays, and the position to install the IRAs
Window or
wall
2 m
- Lighting equipment
- Projectors (LCD, DLP, etc.), OHP, incandescent
light bulbs, etc.
- Mercury vapor lights, halogen lights, and inverter-
type fluorescent lights
- Plasma displays
- Lighting controls
- Infrared equipment, such as remote controls,
infrared microphones, and infrared LAN
- Digital equipment and wiring, such as digital
power amplifiers (speaker wires from digital power
amplifiers, etc.)
- Wi-Fi routers
