CMS Pixel Detector Miscellaneous
Phase 1 Phase 2
Layer 1 Replacement Layers 2-4
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Message ID: 254     Entry time: Thu May 7 00:27:41 2020
Author: Dinko Ferencek 
Category: Module grading 
Subject: Comment about TrimBitDifference and its impact on the Trim Bit Test 
To expand on the following elog, on Mar. 24 Andrey changed the TrimBitDifference parameter in Analyse/Configuration/GradingParameters.cfg from 2 to -2
$ diff Analyse/Configuration/GradingParameters.cfg.default Analyse/Configuration/GradingParameters.cfg
45c45
< TrimBitDifference = 2.
---
> TrimBitDifference = -2.

From the way this parameter is used here, one can see from this line that setting the TrimBitDifference to any negative value effectively turns off the test.

More details about problems with the Trim Bit Test can be found in this elog.
ELOG V3.1.3-7933898