2023-06-10 03:30:47
YB-DAS-250-DAQ has built-in IQ demodulation function for distributed fiber optic DAS systems with balanced detectors, supporting both single-channel IQ demodulation and dual-channel IQ demodulation. Simultaneous upload rates configurable to 250M, 125M, 83.33M, 62.5M, 50M;
When using the upload raw data, or single-channel demodulation function, the number of points per frame (the number of points collected by a single trigger pulse) can support a maximum of 131072 points, that is, the maximum length of a single fiber can reach 131072 * 0.4m = 52.4288 km at an upload rate of 250M (0.4 spatial resolution); if the upload rate is reduced, longer fiber lengths can be supported;
When using the dual-channel demodulation function, the number of points per frame (the number of points collected by a single trigger pulse) can support a maximum of 65536 points, i.e. a single fiber length at 250M (0.4m spatial resolution) upload rate can reach a maximum of 655536*0.4m=26.2144 km, with a total of 26.2144*2=52.4288 km for both channels of fiber; If the upload rate is reduced, longer fiber lengths can be supported.