Redline Communications Inc. AN30 用户手册
AN-30 System User Manual
10.4. Deployment
Scenarios
This section examines two types of deployment scenarios: co-located (same rooftop), and
adjacent area.
adjacent area.
10.4.1. Co-located
Deployments
It is possible to deploy more than one AN-30 system from the same rooftop to support
multiple links, however, it is important to consider issues that may arise from co-channel
and adjacent channel interference.
Co-channel interference results when two systems operate simultaneously in the same
channel. This must be avoided by selecting different channels in the AN-30
Configuration
multiple links, however, it is important to consider issues that may arise from co-channel
and adjacent channel interference.
Co-channel interference results when two systems operate simultaneously in the same
channel. This must be avoided by selecting different channels in the AN-30
Configuration
screen. Adjacent channels are acceptable; however, it is important that the
adjacent channel does not exceed the acceptable channel-to-interference (C/I) ratio for
the system, as shown in Figure 24 (C is the desired channel, while I is the interferer).
the system, as shown in Figure 24 (C is the desired channel, while I is the interferer).
Frequency (Mhz)
Po
w
e
r (
d
B
)
Figure 24: Adjacent Channel Interference.
10.4.2.
Adjacent Area Deployments
During the installation process, it is important to ensure there is no potential for
interference from other systems deployed in adjacent areas. Figure 25 presents a simple
deployment configuration to illustrate the potential interference that may arise from
adjacent area sources (Users 1 to 4 in Figure 25).
The desired communication link is between Terminals 1 and 2. The link between Users 1
and 2 must operate in an adjacent channel to avoid interference with the desired link.
Users 3 and 4, on the other hand, can operate co-channel since they are outside the
narrow beam width of both terminals. Narrow beam widths are one feature of the AN-30
to help address potential interference.
interference from other systems deployed in adjacent areas. Figure 25 presents a simple
deployment configuration to illustrate the potential interference that may arise from
adjacent area sources (Users 1 to 4 in Figure 25).
The desired communication link is between Terminals 1 and 2. The link between Users 1
and 2 must operate in an adjacent channel to avoid interference with the desired link.
Users 3 and 4, on the other hand, can operate co-channel since they are outside the
narrow beam width of both terminals. Narrow beam widths are one feature of the AN-30
to help address potential interference.
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