Pike Technical Manual
V5.2.0
344
Configuration of the camera
Restrictions
Note the restrictions in the following table. When using software with an
Isochronous Resource Manager (IRM): deactivate it.
Operation
The maximum allowed isochronous packet size can be set separately for the ISO
speeds S400 and S800. Check the associated
Presence_Inq
flag to see for which
ISO speed this feature is available.
Setting the
Set2Max
flag to 1 sets the
MaxIsoSize
field to the maximum sup-
ported isochronous packet size. Use this flag to query the maximum supported
size (may depend on the camera model).
Enable this feature by setting the
ON_OFF
flag to 1 and the
MaxIsoSize
field to
a value greater than the default packet size.
The camera ensures:
•
that the value of the
MaxIsoSize
field is a multiple of 4.
•
that the value isn’t lower than the value specified by the IEEE1394 specifi-
cation.
The settings are stored in the user sets.
Software
Restrictions
FireGrab
Deactivate Isochronous Resource Manager:
SetParameter (FGP_USEIRMFORBW, 0)
FireStack/FireClass
No restrictions
SDKs using Microsoft driver
(Active FirePackage,
Direct FirePackage, ...)
n/a
Linux: libdc1394_1.x
No restrictions
Linux: libdc1394_2.x
Deactivate Isochronous Resource Manager:
Set DC1394_CAPTURE_FLAGS_BANDWIDTH_ALLOC flag to 0
Third Party Software
Deactivate Isochronous Resource Manager
Table 179: Restrictions for feature:
Maximum ISO packet size
Note
Enabling this feature will not change the
MaxBytePerPacket
value automatically. The camera may not use the new
isochronous packet size for the
MaxBytePerPacket
value until
a write access to the desired Format_7 mode has been issued.