HBM FS22 SI, User Manual, Page: 99 / 116

BraggMONITOR SI User Interface
FS22 SI
A4249-8.0 HBM: public
99
ventional method (ranges OFF) that uses a global thresh­
old and the Smart Peak Detection (ranges ON) that uses
the threshold individually inside each sensor range.
Ranges
Using the “ranges on/off" button (number 3 in Fig. 7.24 )
the user may select which FBG sensor detection method
will be used.
When ranges are ON ( see Fig. 7.24 ), the spectral graph
will display the range associated with each sensor that is
listed in the Configuration tab and the respective thresh­
old used for the FBG peak computation. Even when mul­
tiple peaks occur inside one range, only one FBG sensor
will be detected.
When the ranges are OFF ( see Fig. 7.25 ), the spectral
graph will contain the optical spectrum of the selected
channel and an horizontal line representing the threshold
level considered for the detection of the FBG sensors.
On the right side of the spectral view tab, below the opti­
cal channel selector, one can find info regarding the
detected sensors (number
12 in Fig. 7.24 ).
When the conventional method for FBG sensor detection
is selected only the “Wavelengths" table is displayed
(
see Fig. 7.25 ). In that table it is possible to observe the
wavelengths of the detected sensor peaks (WL (nm)) and
the corresponding powers (PWR (dBm)). Below the
“Wavelengths" table a numeric indicator shows the num­
ber of detected sensors on the selected channel (num­
ber
11 in Fig. 7.24 ).
Conventional
Measurement
Method