Forums › BB Series Discussions › Clarification on real time Frame dimensions
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Andrew.
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YBhadauriaParticipant- This topic was modified 1 year, 6 months ago by
YBhadauria.
The size of min/max array returned by fetchRealTime() function is 16416. And I assume that it is equal to number of bins in one sweep.
Now, the size of frame width and height is 513 and 256 respectively.
My questions are:
1) What does frame height represents? Is it the frequency bins, in case yes then how they are just 513 instead of 16416?
2) What does the frame width represents, is it time?
AndrewModeratorThe frame height simply divides the vertical scale by the number of bins. So if you configured it for a 100dB range, then each bin is 100/256 dB in height. If a signal is outside this range, it is usually clamped to the upper or lower bin in a column.
For the width, if it exceeds a certain width we will start binning. For example, 16416 / 513 = 32. So each column will contain 32 frequency bins from each sweep. We accumulate all 32 independently in one column as opposed to creating a much larger image.
Each full frame is roughly 1/30th of a second of sweeps. So you will get ~30 frames per second.
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