On Sun, Nov 28, 2010 at 7:30 PM, Abe Bachrach <[email protected]> wrote:
> One other question for Andrey/someone else is: > > - How much time elapses between when the first and last row are read-out? > > from looking at the datasheet, it says that the maximum datarate is 96Mp/s, > which would mean that for full resolution, the time gap would be at least > 0.052488 seconds. > Abe, It is somewhat longer than that because of the large "margins", the average data rate of the sensor running at 96MHz is ~75MPix/sec. There are formulae in the datasheet that allow to calculate line readout time for different ROI and decimation > > - is the sensor being run at the full 96MHz clock rate? Is that time gap > number correct? > 96MHz - yes, correct, but the "gap" is wrong - at full resolution readout time (and so the delay between the first and last line exposure) is ~1/15 sec > > also, > - How does the subsampling mode effect this. If we put the sensor in > binning/skipping mode, and downsample by 4x, ideally, this would mean that > there it takes 0.0032 seconds to read out a frame. > Yes, that is correct. Just keep in mind that there is a large "dead" time (horizontal blanking) added to each scan line, but small on top and bottom (vertical blanking) Andrey
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