AASTRA RFP 34 IP DECT Site Survey Kit User Guide DE - Handbuch (Seite 54)

52
Measurement/Planning
Measuring procedure
Specifying limit values in different coverage areas
There are different requirements for the areas to be covered (e.g. office, basement) based on the
quality or use of the areas. Accordingly different limit values can be used for the measurements.
Even within a partial system different quality requirements can be specified for the various base sta-
tions.
Generally speaking, it can be said that systems which measure out up to –60dBm provide good
quality. For measurements up to –70dBm it is necessary to verify and evaluate the measurement
using an audio connection to ensure that the quality is sufficient. Handovers are still possible in this
area.
Field strength in dBm Quality
-50 very good
-60 good
-65 satisfactory
-70 sufficient
-73 weak Not suitable!
-76 poor Not suitable!
Next, move with the two handsets and the base station to the spot where you want to install the
first base station. Secure the test base station provisionally to the spot in question (e.g. by position-
ing the tripod with the base station in that spot). Next, while observing the display and the signal on
the handset, walk around the circumscribed area of the transmitter with the handsets until the limit
value is shown on the display. Enter these points on your floor plan.