IBM 1725 SLS - Manual (Page 69)

Emulations
2-35 Printer Configuration
Download Location
Controls the default storage location of PCL objects (fonts, macros,
and patterns) when it is not otherwise specified through Document
Option Commands.
Notes When set to off, this option maps pen colors as follows:
Pen 0=White, Pen 1=Black, Pen 2=Red, Pen 3=Green, Pen
4=Yellow, Pen 5=Blue, Pen 6=Magenta, Pen 7=Cyan.
When set to on, this option tells the printer to map each pen to
its assigned color, then convert the color to a grayscale using
the National Television System Committee (NTSC) color
standard for luminosity coefficients (Additive System):
Y = 0.30R + 0.59G + 0.11B
Example of how to use the color standard formula:
White Y = [1*0.30) + (1*0.59) + (1*0.11)]—100% gray
Black Y = [0*0.30) + (0*0.59) + (0*0.11)]—0% gray
Red Y = [1*0.30) + (0*0.59) + (0*0.11)]—30% gray
Green Y = [0*0.30) + (1*0.59) + (0*0.11)]—59% gray
Yellow Y = [1*0.30) + (1*0.59) + (0*0.11)]—89% gray
Blue Y = [0*0.30) + (0*0.59) + (1*0.11)]—11% gray
Magenta Y = [1*0.30) + (0*0.59) + (1*0.11)]—41% gray
Cyan
Y = [0*0.30) + (1*0.59) + (1*0.11)]—70% gray
Menu Administration/Emulations/PCL 5/Downld Location
Choices Disk—All downloaded PCL objects are stored in the default
disk resource, if present.
Memory—All downloaded PCL objects are stored in temporary
storage in RAM.
Default Disk
Notes Document Option Commands specifying resources override
this option on a per-job basis.
If this option is set to Disk and no hard disk is installed,
memory is used as the default storage location.
If the printer has both a hard disk and a large amount of
memory, setting this option to Memory enhances printer
performance.