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Appendix
Radio Modes
The radio module installed in each ISDL-2400 Wireless Data
Logger and ISR-2400 Wireless Repeater operates in three
possible modes, indicated on various LCD displays by the
Radio Status:
Awake- the radio is active and able to transmit and
receive data.
Sleep- the radio is inactive when not in use to
conserve battery power.
Setup- the radio briefl y enters Setup mode when fi rst
powered on or when beginning a range test.
The ISDL-2400 and ISR-2400 radio mode changes from
Sleep to Awake at every sampling period. If the unit is part
of a network, the sampling period interval and the length
of time that the radio mode changes to Awake is controlled
at the central workstation by a sync command from the Soil
Manager.
Several programming features of the ISDL-2400 and the ISR-
2400 provide the ability to force the radio mode to Awake
using the WAKE option. If this function is used, the radio
will wake up for approximately 30 seconds and attempt to
communicate with the wireless network. If unsuccessful,
the radio will default to a 2 second Wake/2 second Sleep
repeated cycle until communication is reestablished.
RSSI (Received Signal Strength Indicator) is the received
radio signal strength from the wireless network, measured
in dBm, or the power ratio in decibels.
Table 6 - RSSI Values
Value
Relative Strength
-92 to -85
Low
-85 to -80
Medium
Above -80
High
Integrated Sensor System
85
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