[Steve Harley] "When I open a SMPTE Color Bars .tif file on the PC -- the chroma and luminance are almost perfect on my scopes. But when I view the PC's desktop -- or an application like a web browser -- the chroma and luminance levels are completely off-the-charts and in illegal territory. "
Tif files may or may not be in the same color space as the video signal is. Tif's are RGB, video is NOT.
Make the Bars image your desktop background and calibrate on image as you are capturing it. if the background is not correct anything that shows will not be correct either.
gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows for the Digitally Inclined
Chicago, IL
http://library.creativecow.net/articles/adcock_gary/AJAIOHD.php