HBM FS22 SI User Manual page 64

Remote Communications
64
:ACQUisition:WAVElength:CHANnel:C?
Returns the peak wavelength of the fiber Bragg grating sen­
sors in channel C of the FS22 according to the threshold
settings. The number of channels can be "A" to simultane­
ously retrieve the data relative to all sensors in all channels.
Example:
Command
Answer
Continuous Acquisition
:ACQUisition:OSATrace:CONTinuous:STARt
Simultaneous continuous acquisition of optical spectrum
traces of all channels. This command is sent via port 3500
and corresponding data is received through port 3365 in
binary format. The answer is a big endian binary stream rep­
resenting a double precision (8 bytes) array with 20001
points times the number of optical channels of the interroga­
tor. The first 4 bytes of the binary stream indicate the number
of data bytes to be read. To be in agreement with the com­
munication protocol syntax of the interrogator, Carriage
Return/Line Feed (CR/LF) are also included in the stream
and, therefore, "2" must be added to the value returned by
the first 4 bytes of the stream.
The returned data represents the power values of the OSA
traces for all optical channels with points from 1500 nm to
1600 nm sampled every 5 pm.
Example:
Command
Answer
A4249-8.0 HBM: public
:ACQU:WAVE:CHAN:1?
:ACK:1523.6573, 1554.0709,
1566.7846
:ACQU:OSAT:CONT:STAR
Port 3500 » :ACK
Port 3365 »
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#OCx20001
FS22 SI