Patent ID: 8675005

Claim:
A waveform observing apparatus, which temporarily stores sampled measured data, creates a measured data file in a body memory in each predetermined filing creation cycle, houses a plurality of the temporarily stored measured data into the measured data file corresponding to the each predetermined filing creation cycle, and also supplies a removable storage medium with a copy of the measured data file stored in the body memory, wherein, in supplying the removable storage medium with a copy of the measured data file between a first predetermined filing creation cycle and a subsequent predetermined filing creation cycle, a first measured data file is created in the body memory for housing the temporarily stored measured data that exists after the first predetermined filing creation cycle, and wherein, when said subsequent predetermined filing creation cycle occurs, a second measured data file is created in the body memory for housing the temporarily stored measured data that exists after the first predetermined filing creation cycle, including said temporarily stored measured data in said first measured data file so as to enable a user to re-write the first measured data file on the removable storage medium with said second measured data file, and wherein said first measured data is partial to the second measured data file.