Deployment Scenarios; Co-Located Deployments; Adjacent Area Deployments; Figure 24: Adjacent Channel Interference - Redline AN-30 System User Manual

10.4.

Deployment Scenarios

This section examines two types of deployment scenarios: co-located (same rooftop), and
adjacent area.
10.4.1.
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 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).
10.4.2.
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.
Redline Communications

Co-located Deployments

Frequency (Mhz)

Figure 24: Adjacent Channel Interference.

Adjacent Area Deployments

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AN-30 System User Manual
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