black and white reference voltage level

[GcDago]

I'm using the PCI-1407 board to acquire a video signal coming from an analog B/W camera.
It is possible to set both the white and black reference level (Volt) by using MAX. The PCI-1407 range is 0-1,26V.
Sometimes, also giving a voltage level within the range the following error occurs: "requested white (or black) reference voltage is out of range".
I'm using Windows XP, LabVIEW7 and NI-IMAQ 3.1.
My questions are:
- It is correct or incorrect this situation?
- If it is correct it means that these reference voltage levels are dependent from the input video signal. In which way con I understand these limits avoiding the error?

Thank you
GcDago

[ambu]

Hi,
are you obtain this error from MAX or from LabVIEW?
Try to change the decimal symbol and the digit grouping symbol in the Numeric tab of the Regional Options of the Control Panel and check the "localized decimal point" flag in the option of Labview.
A possible reason is that these settings are inverted and MAX stores a bad value that is out of range.

Best regards
AmbuA

[GcDago]

Hi ambu,
I'm obtaining this error both from MAX and LabVIEW.
Unfortunately I've already changed the settings in Regional Options and also the "localized decimal point" flag.

Do you think that this error is forseen by National Instruments or it is due to some mistakes maybe in the NI-IMAQ driver? I'm using Windows XP, Labview 7.0, NI-IMAQ 3.1 and MAX 3.1.1.

GcDago