Compatibility between 1394a and 1394b, Compatibility example, S in chapter – ALLIED Vision Technologies Pike F-1600 User Manual
Page 39: 1394a and, 1394b cameras and compatibility, Figure 4: 1394a and
FireWire
PIKE Technical Manual V5.1.2
39
Compatibility between 1394a and 1394b
Compatibility example
It’s possible to run a 1394a and a 1394b camera on the 1394b bus.
You can e.g. run a PIKE F-032B and a MARLIN F-033B on the same bus:
•
PIKE F-032B @ S800 and 120 fps (5120 bytes per cycle, 64% of the cycle
slot)
•
MARLIN F-033B @ S400 and 30 fps (1280 bytes, 32% of the cycle slot)
Bus runs at 800 Mbit/s for all devices. Data from Marlin’s port is up-converted
from 400 Mbit/s to 800 Mbit/s by data doubling (padding), still needing 32% of
the cycle slot time. This doubles the bandwidth requirement for this port, as if
the camera were running at 60 fps. Total consumption is thus 5120 + 2560 =
7680 bytes per cycle.
1394a camera connected to 1394b bus
The cable explains dual compatibility: This cable
serves to connect an IEEE 1394a camera with its six-
pin connector to a bilingual port (a port which can
talk in a- or b-language) of a 1394b bus.
In this case the b-bus communicates in a-language
and a-speed with the camera achieving
a-performance
1394b camera connected to 1394a bus
The cable explains dual compatibility: In this case,
the cable connects an IEEE 1394b camera with its
nine-pin connector to a 1394a port.
In this case the b-camera communicates in
a-language with the camera achieving
a-performance
Figure 4: 1394a and 1394b cameras and compatibility
www
For suitable cables, see:
1394b port
1394a camera
1394a port
1394b camera