ALLIED Vision Technologies Stingray F-504 - Manual (Page 39)

FireWire
STINGRAY Technical Manual V4.4.4
38
For multi-camera applications one of the following bus cards is needed:
• PCI ExpressCard with potential 250 MByte/s per lane (up to 6 supported
by chipset) or
• 64-bit PCI-X card (160 MByte/s)
Requirements for laptop and 1394b
As mentioned above, 1394b requires low latency for data transmission (small
receive-FIFO). In order to get the most out of your camera-to-laptop config-
uration, we recommend the following chipset for your laptop:
• For Intel-based laptops, chipset 915 (or higher)
• For non-Intel based laptops (e.g. AMD), PCI Express compatible chipset
Because most laptops have (only) one PC-card interface, it is possible to con-
nect one Stingray camera to your laptop at full speed. Alternatively laptops
with an additional 1394 ExpressCard interface can be used.
Caution

As mentioned earlier, it is very important not to exceed
an inrush current of 18 mJoule in 3 ms. (This means that
a device, when powered via 12 V bus power must never
draw more than 1.5 A, even not in the first 3 ms.)
Higher inrush current may damage the physical interface
chip of the camera and/or the phy chip in your PC.
Whereas inrush current is not a problem for one Stingray
camera, daisy chaining multiple cameras or supplying bus
power via (optional) HIROSE power out to circuitry with
unknown inrush currents needs careful design consider-
ations to be on the safe side.
Note

Recent developments at Apple (TM) allow the INTEL
based Apple computers (both laptops as well as desk-
tops) to run a Win-OS. This makes it possible to use AVT
1394 camera technology with the same AVT-SDKs.