User Manual

3. USB Backboard Use
3.1. LED Indication
3.1.1. Normal operation
Three LED indicators are present on the USB backboard, and are visible through the             
back of the yellow plastic case.

Table 4 - LED indicators of the USB backboard
LED designator
Description
PWR (ORANGE)
The Power LED is ON whenever the sensor is powered
RED
Flashes briefly on startup to indicate proper initialization;
then switches off
GREEN
Blinks 8 times at power up
GREEN LED blinks every 5 seconds when the sensor is streaming          
data
3.1.2. Error messages and troubleshooting
Table 5 - USB backboard LEDs troubleshooting

LED
designator
Sequence
Signification
Corrective actions
RED
Continuous
blinking
Sensor has detected a fault    
and has stopped functioning
Check that the sensor is    
properly connected to the   
backboard, then restart  
the sensor
RED /
GREEN
Both LEDs
blinking
continuously
Sensor has detected a fault in     
the sensor initialization  
process
Check USB output for   
details of the error

Verify that the sensor is    
properly connected and  
re-power the unit


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Terabee, 90 Rue Henri Fabre
01630, St Genis-Pouilly, France (next to CERN)
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