User Manual Part 2

IS-900 User Guide Page 138 of 159
The upper chart indicates the signal strength in dB at 1 MHz increments across the frequency
range (in green). It also shows the maximum signal level detected in each of 16 bins
corresponding to the available wireless channels (in red). The yellow lines are a visual aid that
jump up to the current levels if higher than the lines and then slowly drift down.
The lower chart is a spectrogram or time-frequency plot that displays the average signal level
corresponding to each of the 16 channels versus time.
To evaluate the background RF environment, RF Scope should be used with any other wireless
InterSense equipment powered off. Ideally, the display should indicate a very quiet environment.
Some sporadic activity typically has little effect on wireless MicroTrax communication. However,
sustained activity lasting one second or more can interfere with communication and degrade
tracking performance.
If interference is detected, first try to identify the source and eliminate it if possible. Wireless
LANs, cordless phones and Bluetooth devices are examples of wireless equipment that operate
in the 2.4 GHz range. Try to turn such equipment off or move the wireless components away from
the IS-900.
Once sources of interference have been minimized, set the wireless MicroTrax devices to
channels that exhibit the least interference using the Wireless Configuration tool in ISDEMO (see
section 14.4) to configure the MicroTrax radios.