# FPS to Hertz in a camera

Not sure if this is the proper place to ask this, but I'm sure someone here will know the answer.

I have this optical camera (TrackIR 4), which, for what you can see on the table, samples images at a rate of 120 frames per second.

Now how would you do a conversion from fps to Hertz to find out the frequency rate at which the camera samples data?

Maybe it's a stupid question, but I wanna make sure I get the right value.

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If you want to find out the sampling frequency of the ADC device in the camera you could calculate it like that: $$f_\mathrm{s} = N_\mathrm{pixel} \cdot R_\mathrm{frame}$$ where $N_\mathrm{pixel}$ is the number of pixels in the sensor and $R_\mathrm{frame}$ is the frame rate. With the numbers from the data sheet I obtain a sampling frequency of 12.3 MHz. I can't tell if this is the actual frequency used by the camera. If it uses oversampling or interlacing the value could differ.