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Chapter 8. PPL3 Plus Emulation GEK-00029B
246
SPI Spacing Pitch Increment:
Determines the Vertical Advance
Increment (VAI) or the Horizontal Advance Increment (HAI).
Source:
Application
Destination:
Level 3
Format
CSI Pn1 Pn2 SP G
Description
SPI gives maximum flexibility in adjusting character and line spacing.
If Proportional Spacing Mode (DECPSP) is set, the vertical component
of SPI has no immediate effect.
Select Pn1 as follows:
Pn1 Meaning
0 VAI size determined by current font.
n VAI size in units, depending on Positioning
Unit Mode (PUM) and Select Size Unit (SSU).
Select Pn2 as follows:
Pn2 Meaning
0 HAI size determined by current font.
n HAI size in units, depending on PUM and
SSU.
The printer saves the HAI value upon receipt of SHS even when
DECPSP is set; however, it does not use the value until DECPSP is
reset.
The RAI and VAI values chosen remain in effect until one of the
following occurs:
▪
Another SPI command
▪
A Set Horizontal Pitch (DECSHORP) command
▪
A Set Horizontal Spacing (SHS) command
▪
Reset or power down
The SPI setting for vertical spacing remains the same until one of the
following commands is received:
▪
Another SPI command
▪
A Set Vertical Spacing (SVS) command
▪
A Set Vertical Pitch (DECVERP) command
▪
Reset or power down
If Pn1 = 0 or Pn2 = 0, the printer uses the default vertical and
horizontal spacing for the selected font See Sect-ion 3.2.1.2 for more
information on font-dependent spacing.