Frequency over time of a .REC signal

[PaulLeKing]

Hi everyone,

I am using DIAdem to analyse a sinusoidal signal provided by a "SEFRAM" device. This device provides me a .REC file.

The particularity of a .REC file is that there is no time channel.

I would like to plot the frequency over time and the frequency over amplitude. I've tried the function "Order analysis (frequency domain)" with no succeed.

Does someone have some advices ?

Thank you !

[ColinF]

Hi Paul,

is the problem the missing time channel or the frequency calculation?

If it is the first point, then you could create a time channel based on the waveform information on the extended properties section
with the function "Generate Time Channel". In your screenshot is mentioned a start date, the step width and the channel length.