8 Internal Status LEDs
Internally, the reader is equipped with 2 LED bars for status display which might be useful
for the advanced system integrator for setting up and analyzing the system's status. The
LEDs can be reached by opening the upper housing half after removing the upper two
screws. The LEDs are labeled on the circuit board.
The LEDs of the status bar signals the status of the reader as listed in Tab. 5.
Status LEDs
Color
Status
LED S1
green
Transponder detected
LED S2
green
RFU
LED S3
green
RFU
LED S4
green
RFU
LED S5
green
Application processor detected
LED S6
red
Short circuit at the antenna port. This is not just a
bad voltage standing wave ratio, but a short circuit at
the antenna port: Turn off the reader and replace the
antenna
LED S7
red
Collision detected. Indicates either a collision of the
transponder, or data error due to disturbances, or a
badly tuned antenna
LED S8
red
Overtemperature. Turn off reader and let it cool
down
Tab. 5: Meaning of the internal Status LEDs
Technical Documentation metraTec QuasarLR
Page 14 of 19
