Instruction manual

Video formats, modes and bandwidth
In video Format_7 frame rates are no longer fixed but can be varied dynamically by the
parameters described below.
The following formula is used to calculate for the CCD models the highest frame rate in Format_7:
ScanDumpDumeTransCh arg my
CCDIn
TTTT
FPSFPS
+++
==
1
Formula 1: Frame rate calculation
It assumes that the maximum frame rate is the inverse of the sum of all events in a CCD, which
take time such as:
• The time to transfer the storage to the vertical shift register (Charge transfer time)
• The time to shift out the dummy lines
• The time to dump the lines outside the AOI
• The time to shift out the lines of the AOI. (Scanning time)
For the different sensors, different values apply.
Frame rates may be further limited by bandwidth limitation from the IEEE-1394 bus.
Details are described in the next chapter.
MARLIN Technical Manua
l
Page 119