Red
MAX
™
Subscriber Modem
User Manual
70-00057-01-01-DRAFT
Proprietary Redline Communications © 2006
December
13,
2006
Page 16 of 60
2.2.3 Non
Line-of-Sight
The subscriber system supports line-of-sight (LOS), optical line-of-sight (OLOS),
and non line-of-sight (NLOS) operation. A clear LOS link has no obstacles within
60% of the first Fresnel zone of the direct path. An OLOS link has obstructions
within 60% of the first Fresnel zone, but a visible path exists from the base station
to the subscriber.
Figure 5: System - Fresnel Zone
A wireless link is considered non LOS if natural or man-made structures block the
visible path between the base station and subscriber. In this case, a wireless link
can be established only if a reflective path can be established between the base
station and subscriber.
Figure 6: System - Non-Line of Sight Deployment
2.2.4 Channelization
The subscriber is a frequency-specific system, with the frequency band defined by
the internal transceiver unit. The use of the operating band must be in accordance
