Am working in the legalization on some programs, I have no problems bringing the signal within the limits:             

                             composite     -20  -  110 IRE                                                                               

                            luminance      7.5  -   100 IRE

But when i try to bring the signal to the values for the RGB limits 16-235 the quality of the video

degrades to much, my question is, how important is bringing the signal within the RGB limits

so that these programs get accepted .

Thanks for any information.

Am working with avid xpress dv 3.5

What are you using for signal calibration? A Waveform/Vectorscope I hope?

Am not using anything but the software Avid Xpress DV, no vectorscope or any other kind of hardware, if that's necesary, is there any other way to legalize the signal like they do it in Final cut with their own legalizer?

Thanks for any info. 

 It's going to be a guessing game to get chroma values within spec without a vectorscope, but if you have a decently calibrated NTSC client monitor and have to eyeball it, watch the red areas for the "threshold point" where the reds get too vivid and start bleeding and smearing, and back it down a bit from there.

That being said, if your product has to pass Broadcast QC inspection, you should be using the same tools they will be to pass or fail you - the waveform monitor and vectorscope.

 Thanks for the information.