# 3. What changed in version 0.5¶

• A new field: /setup/excitation_alternated (array of booleans), was added, which is True for all excitation sources which are intensity-modulated. This field allows distinguishing between ALEX and PAX measurements (i.e. when only one laser is alternated).
• A New group: /setup/detectors containing arrays of per-pixel information, was added. See Group /setup/detectors.
• Support was added for cases where TCSPC specifications change for each pixel, by addition of dedicated fields in /setup/detectors. See Group /setup/detectors.
• A new measurement_type “generic” was added. In a “generic” measurement, the specifications are determined by the fields in the /setup group. For details see The “generic” measurement type.