» Any on-channel intermodulation levels generated in your
receiver multicoupling system from your transmitters
(and high level carriers from other site transmitters) are
suppressed to permissible levels.
Before starting any RF system site design, it is essential to
conduct a site survey for each site, to fully understand the RF
environment present at each location. For example, you need
to know what other RF systems are already installed at the site,
and where their antennas are on the tower. Some sites may
have several towers and you need to know what signals your
equipment will be exposed to, from the transmit antennas on
those towers. The easiest way to gather this is signal and noise
monitoring, by monitoring the RF spectrum at the site.
The quality of the site survey information and signal and noise
monitoring will directly influence the quality of the resulting site RF
system design. Taking care to gather the information dramatically
reduces the risk of unexpected interference once the system is
built and installed. It takes significantly less time to gather the
information up front than it does to fault find, correct and re-test
the faulty design that will result if you omit the site survey.
From the site survey information, your RF engineer can specify
the optimum antenna positions on the tower, and the filtering
required in the transmitter combiner and receiver multicoupler,
and prevent interference to any site receiver.
The result will be maximum coverage and minimum interference
potential, and that means happy regulators, and happy radio users.