"GKB" wrote in message
news:YU2nd.255688$Pl.208407@pd7tw1no...

Hey Paul , i've worked under the idea that most convertors lose linearity
in
the top & bottom of their ranges , and as a reminder that a few db of
headroom
doesn't hurt [ well maybe 60 hurts with a hammer ! ]

Are you planning a convertor project ?

Nope, testing a commercial product. At -1.1dBFS and below it's unbelievably
clean, but from -1.0dBFS on up it produces surprising levels of HF IM
distortion, especially on a 3-tone test..

Peace,
Paul