HP 5961-0509 manual Relative error when mapped to 3600, Over 7200=0.3332 4801-3600over 3600=0.3336

The current unit of measure setting affects all PCL Unit moves, horizontal and vertical rectangle size, bitmap and scalable font metrics (how the cursor moves after printing a character). The Unit of Measure command does not affect the interpretation of binary raster data (bitmap fonts, raster graphics or patterns).

Once the units of measure is changed, it stays in effect until another is selected or the printer is reset. A control panel or ? E reset returns the current unit of measure setting back to the device default setting (300).

The units value is part of the modified print environment. As such, it is saved and restored whenever a macro is called or an overlay invoked, and defaulted when establishing the overlay environment in preparation for an overlay.

Note	Values out of range are mapped to the supported value with the
	minimum relative error. For example, a unit selection of 4801 would
	be mapped to 7200, since the relative error (0.3332) is less than the
	relative error when mapped to 3600 (0.3336):
		14801 – 7200		= 0.3332 <	4801 – 3600	= 0.3336
	-
	7200		3600

{4801-7200 over 7200}=0.3332 < { 4801-3600over 3600}=0.3336

Figure 4-6 compares a 4-unit vertical and horizontal cursor move with

aunit of measure setting of 100 versus 200 units-per-inch. Note that the cursor move distance is halved when the Units per inch is doubled.

4-14PCL Job Control Commands EN