| 摘要 |
A defect once around signal time period of a defect source inherent in a marking device is determined, the defect source having one or more banding frequencies. A reference scanline time delay, which is a time between a page sync signal and a writing of a reference scanline, is determined. A test target is written, sensed and analyzed. A reference scanline phase offset of each banding frequency relative to the reference scanline is determined. A banding phase of each banding frequency is determined based at least on the defect once around signal time period, reference scanline time delay and reference scanline phase offset.
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