Furuno WN-701-W, User Manual

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5. INSTALLATION: Notes on radio wave path
5-1 Radio wave attenuation by wall, metallic net, etc.
Radio wave is heavily attenuated by wall, metallic net, etc. If heavy attenuation is
anticipated, checking by measuring instrument is required.
5-2 Interference from ISM devices
IEEE802.11b/g-compatible wireless LAN device like this unit uses 2.4 GHz ISM
(Industry Science Medical) band. The 2.4 GHz ISM band is widely used by
microwave ovens, high-frequency medical equipment, etc.
If such ISM devices are installed nearby, you have to check mutual interference
beforehand by using measuring instrument. For a microwave oven, check
communication quality while heating water in a heat-proof bowl.
5-3 Mounting Location
Tabletop, overhead or wall mount is available. Decide mounting location, taking
the following points into consideration:
- Measure or guess radio wave coverage of your access point. For measurement,
consult with the vendor of this unit.
For guess, use the following guideline:
ENVIRONMENT
(INDOOR)
COVERAGE
(DIAMETER)
Open Shorter than 100 m
(No obstacle on line of sight)
Semi-open Shorter than 50 m
(Medium between “Open” and “Closed” environment)
Closed Shorter than 20 m
(Enclosed in compartment which reaches ceiling)
- Select a high location around the center of the intended communication area.
- Strong vibration or mechanical shock is not anticipated.
- Ambient temperature is not high but not extremely low, and humidity is low.
- Splash or rain drop is not anticipated.
- Avoid corrosive or exhaust gas environment.
- Select a place accessible for mounting and maintenance.
- Avoid the places where interference is anticipated. Make sure that there is no
metallic obstacle around this unit.