11
Battery Level
Each antenna WASP sensor monitors and reports the battery level to give the user
plenty of notice before the battery needs to be replaced.
Wireless Signal Strength
In any wireless network the signal strength of the received signal is a key measure of
the reliability of the wireless link. The antenna WASP makes Received Signal Strength
Indicator (RSSI) measurements (in units of dBm) at both ends of each wireless link and
reports the information to the Data Collector. Very low RSSI measurements can indicate
that a sensor is at the limit of the wireless range or that something has moved into the
transmission path and is blocking the signal. This signal strength information can be
configured to generate alarm conditions and may be used by technicians to
troubleshoot the network.
When the antenna WASP sensor transmits sensor information to the Data Collector, the
receiver within the Data Collector makes a measurement of the RSSI, as illustrated
below.
Occasionally the Data Collector will send commands or upload information to the WASP
sensor, in which case the WASP sensor measures the received signal strength and
relays the measurement back to the Data Collector the next time it transmits sensor
information. This situation is illustrated below.
Summary of Contents for Antenna W.A.S.P.
Page 1: ...Antenna W A S P User s Guide...
Page 5: ...5 CE Mark Conformity...
Page 59: ...59 Technical Support Contacts...
