Memo Review Memo: 422 - The Dual-Load Calibration device revisited Guilloteau, 2002May23 Reviewer: Dave Woody (unsolicited) Date Received: 2002Aug07 Review: The chopping frequency analysis is much too simplified, despite it taking up most of the paper, and a more rigorous analysis comes to a quite different conclusion. There are problems with the dual-load scheme, but I would not make a decision to abandon it based on what I believe to be an incorrect chopping frequency analysis. attachment: ALMA422comment.pdf