Philips Avalon CTS M2720A, Service Manual

Page: 18 / 110

1 General Information Considerations for Choice of Configuration
12
Standard Delivery Configuration
The Avalon CTS is normally delivered with:
• Automatic channel search.
• A standard antenna.
Using the standard antenna, the potential operating range is up to 100 meters/300 feet. The actual
effective area of reach will vary according to the geographical and physical characteristics of the building
where the system is installed, and is also influenced by the presence of other radio frequency (RF) devices
or interference. We recommend that you define effective operating range prior to putting the system into
operation.
If the area of reach is adequate for the intended monitoring area, and the system’s operation is not
influenced by other RF sources, then the normal delivery configuration is sufficient.
When is a Different Configuration Needed?
This section deals with possible reasons why the standard delivery configuration may not be adequate.
When the Area of Reach is Not Sufficient
If the area of reach is not sufficient using the standard antenna supplied with the system, there are a few
things to consider:
– The placement of the antenna has an effect on the operating range. If it is located inside a metal cart
or other RF-absorbing material, then place the antenna externally by using the Antenna Extension
Mounting Kit (M2720A Option K01) to increase the range.
– Check the orientation of the antenna. In general, the antenna provides the greatest range when it is
positioned vertically.
– If the area of reach is still insufficient, consider installing an antenna system.
When the Standard Configuration is Unsuitable
The standard configuration, with free base station channel search, may be unsuitable if:
• There are other telemetry or RF systems installed in the hospital.
• There are multiple (more than ten) stand-alone Avalon CTS systems.
• There are other sources of RF interference, for instance, broadcasting stations, microwave devices, and
wireless temperature sensors.
• You connect the Avalon CTS to an antenna system.
• There are country-specific regulations requiring special configuration (in Japan, for example), or your
country requires a Multi-Region base station.
Japanese Systems
Transducers must use fixed frequencies. They are initially shipped from the factory with no frequencies
assigned to them. During installation, they are initialized, and their frequencies are set. (See also
“Transducers for Japan” on page 66.)