Allied International V2.4.0 Manual Do Utilizador

 OSCAR Technical Manual V2.4.0

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In this case the camera can resynchronize the horizontal clock to the new 
trigger event, leaving only a very short uncertainty time of the master clock 
period.

An image is normally captured and transported in consecutive steps. The 
image is taken, read out from the sensor, digitized and sent over the 1394 
bus.

As all Oscar cameras are equipped with built-in image memory, this order of 
events can be paused or delayed by using the deferred image transport fea-
ture.

Oscar cameras, by standard, are equipped with 32 MB RAM (Oscar F-810C: 
64 MB RAM). As an option, the memory can be extended at the factory to a 
maximum of 256 MB.

The table below shows how many frames can be stored by each model. The 
memory is arranged in a FIFO (First in First out) manner. This makes address-
ing for individual images unnecessary.

Deferred image transport is especially useful for multi-camera applications 
where a multitude of cameras grab a certain number of images without hav-
ing to take available bus bandwidth, DMA- and ISO-channels into account. 

Oscar F-320C

± 3.35 µs

± 98 µs

Oscar F-510C

± 6.00 µs

± 134 µs

Oscar F-810C

± 7.85 µs

± 128 µs

 Table 40: Jitter at exposure start

L

•

Jitter at the beginning of an exposure has no effect on 
the length of exposure, i.e. it is always constant.

Oscar F-320C

3 frames (32 MB)

31 frames (256 MB)

Oscar F-510C

2 frames (32 MB)

23 frames (256 MB)

Oscar F-810C

3 frames (64 MB)

15 frames (256 MB)

 Table 41: FIFO memory size