Defining The Place Of Installation; Radio Test Set - Siemens FDCW221 Technical Manual

6.3

Defining the place of installation

6.4

Radio test set

Building Technologies
Fire Safety & Security Systems
General restrictions / system limitations
Maximum number of radio detectors per radio gateway
Maximum distance between radio gateway and radio detector
Several radio gateways use the same basis channel
Faults or malfunctions may occur.
CAUTION
Commission the radio gateways one after the other in the same transmission
field.
If you want to commission several radio gateways, these must be commissioned
one after the other in the same transmission field, so that each radio gateway is
able to determine its own basis channel in configuration mode and registered radio
detectors each communicate with only one radio gateway.
Afterwards you may as well install the radio gateway in longer distances.
So you can ensure that even temporary changes of the radio detectors do not
cause any malfunctions due to the occupancy of the same basis channels.
Measure the distances between the radio gateway and the radio detector on the building plan and
calculate the attenuation.
For a safe project planning, it is necessary to measure the field strengths in the building.
More than 16 radio gateways
When a project comprises more than 16 radio gateway (max. exploitation),
additional radio gateways (> 16) without radio cell overlapping must be installed in
a transmission field.
This means that the 16 basis channels can again be used.
For a safe project planning, it is necessary to measure the field strengths in the
building.
The field strength can be measured with the radio test set DZW1171.
Operating instructions 'Radio test set DZW1171': document no. 004446.
Project engineering
30
40 m or 90 dB
29
009865_b_en_--.doc
11.2007