User's Manual

InterSense Doc. No. 072-00105-0I07 Rev. 4.2
IS-900 User Guide Page 49 of 177
simultaneously, for example it is acceptable to set a 900 MHz and 2.4 GHz tracker/Base
Receiver Module to channel 4 on the same system.
900 MHz wireless devices allow receiver sharing, which is a special mode that allows two
trackers to connect to a single Base Receiver Module.
3.6.2. Receiver Sharing (900 MHz)
When receiver sharing is configured by adding a second link ID to the port configuration as
shown below, two important changes occur.
The first change is that all physical ports on the IS-900 are mapped to 2 stations, so trackers
communicating with the receiver on processor port 1 become stations 1 and 2, trackers on
port 2 become stations 3 and 4, etc. This only applies to trackers and Base Receiver
Modules, not SoniStrips, which are still numbered based on the physical port number.
Wired devices and 2.4 GHz wireless devices (which do not support channel sharing) are
assigned to the first station on a given port (2*p-1, where p is the port number), for example
a wired tracker in port 4 would become station 7. Physical ports above port 4 cannot be
used for trackers/Base Receiver Modules in this configuration.
The second change that occurs when using receiver sharing is a decrease in update rate of all wired
and wireless devices, from approximately 120 Hz to 110 Hz.
3.6.3. Wireless Device Configuration
IMPORTANT NOTE: Additional wireless IS-900 tracking systems in the immediate area
should be shut down while a new system is being configured to avoid the possibility of
interference during setup.