Initializing works as admininstrator but not as standard user


All Frame Grabbers of the mvSIGMA-, mvDELTA, pcIMAGE, mvTITAN- and mvGAMMA-line work by standard with the so-called virtual DMA buffer.
This buffer is allocated while opening the frame grabber and is freed when the board is closed.
For a proper allocation administrator rights or at least the advanced right "Increase Sheduling Priority" is needed.

Now you have 2 possibilities to work with these frame grabbers and users without administrative rights:

1) Switching from virtual to physical buffer
The frame grabbers of the MVsigma-line can work either with the virtual or the so-called physical buffer.
The physical buffer is allocated while starting up the system and is locked until the system is shut down.
For the allocation no special user rights are needed.
For switching to the physical buffer you have to do the following:

(mvSIGMA-Sx / mvDELTA)
- enter a line in the used configuration file (e.g. grabber.ini)
DMABuffer 1
- Set up the wanted size of the buffer:


- comment the line "AllocFrameBuffer" out or delete it from your config file.
the pcIMAGE-SDIG will immediatly switch to the physical DMA-Buffer.


// AllocFrameBuffer 0x400000L

For this run the program ..winntmatrixsetdma.exe and write in the wanted size.

After a reboot you can work with the frame grabber and a general user.

2) Assignment of advanced user right

Windows 2000:
You can use the virtual buffer if you assign the advanced user right
"Increase Sheduling Priority" to the concerning user group.
In Windows 2000 it is located in "Settings - Control Panel - Administrative Tools - Local Security Policy",
menu "Local Security Settings", Tree-entry "User Rights Assignment"

Windows XP:
In Windows XP/2000/NT4 the userrights are assigned in the Control Panel
in the area "Administrative Tools / Local Security Policy".
Only the design of the Control Panel is different in Windows XP. There are two designs to choose:
1) Category view:
In the right lower part of the control panel headed by "or System Control Icon" you can find
the Icon "Administrative Tools". With a double klick on this icon a new windows is opened
where you can find the icon for the "Local Security Policy".

2) Standard view (like in Windows 2000):
In this view you can directly find the icon for the "Administrative Tools".
With a double click on this icon a new windows is opened where you can find the icon for the "Local Security Policy".

Go back