Hints and TipsSystem Guide 9-7Image Quality (IQ)Generally the image quality of a base printing system isabove average and the Image Quality (IQ) enhancementsfilters provided within DocuSP is unnecessary. If you wish toimprove output IQ, the DocuSP provides separate controlsfor enabling Anti Aliasing, Trapping, and Intelligent BlackOverprint.Disabling all three of these IQ filters improves performance. Ifyou are printing only a small number of copies, the expectedincrease in RIP time is visible as a significant fraction of thetotal job processing time.When printing documents with a large a number of copies,then the majority of the processing time is devoted to theactual printing and the RIP performance decrease is lessvisible (a smaller fraction of the total job time). You shouldexamine the DocuSP printed output with the IQ enhancingfilters enabled and disabled and decide whether the IQimprovement is worth the performance drop for this particularjob.On DC 2045/2060/6060/5252 and 8000 there are certainscenarios in which the printer will cycle down and do anImage Quality (IQ) adjustment. The percent area coverage ofthe page (that is, amount of image/text written on the page)also effects the number of IQ adjustments that the printermakes. A standard letter size page (8.5x11 inches) is about21.6x27.9 cm or about 603.5 square cm.If the text and images written to a page cover more thanabout 250 square cm (about 40% of the page), then the printengine automatically generates IQ adjustments.If you find that a particular document seems to take a longtime to print because of IQ adjustments, improveperformance by simplifying the page. For example, the textand images on the page might be downsized to cover lessthan 40% of the viewable area of the paper and theperformance may improve because the printer does fewer IQadjustments.The DC 2045/2060/6060 print engine also performs IQadjustments if a difficult job is being processed and RIP fallsbehind the print output. If this occurs, the print engine willcycle down for a few seconds while the RIP catches up andthen it performs an IQ adjustment which takes anywhere from5-95 seconds. During the IQ adjustment, the printer does notprint anything. However, the RIP continues and be slightlyahead. As soon as the printer finishes the IQ adjustment itprints all of the RIPped pages and catch up with the printer.