Technical information
30DCA Intertel DCA Intertel
DCA Intertel 31 DCA Intertel
4.2.13 HORIZONTAL TABS
HT Horizontal tabs
Format:
ASCII: HT
decimal: 9
hexadecimal: 09
Comment: Pre-setting
Presetting of horizontal positions within the line is possible with the HT character, to
facilitate for example form or table printing. By this command the print head is moved
to the next position of horizontal tab setting. Horizontal tabs are initially set at inter-
vals of 8 characters in the default PICA (10 CPI) format, which corresponds to one
horizontal tab set every 8/10 of an inch (20.3 mm).
Further modications of the character pitch do not affect horizontal tabs. For example,
if we shift from Pica (10 CPI) to Elite (12 CPI) characters, the rst tab will still be at
8/10 of an inch from the left margin and so on for subsequent tabs.
ESC D n1 n2...NUL Set horizontal tabs
Format:
ASCII: ESC D n1 n2...NUL
decimal: 27 68 n1 n2...0
hexadecimal: 1B 44 n1 n2...00
Comment:
This command allows for setting up to 32 horizontal tab positions. Tabs are represen-
ted by parameters n1, n2 etc., where “n” value ranges from 1 to 159 (01hex...9Fhex)
in increasing order (n1<n2<n3 etc.). Maximum practical value for horizontal tab is
equal to the maximum number of characters per line less 1 unit (see para. 5.2) The
NUL character indicates the end of the command.
Tab positions depend on the character pitch set when this command is issued and will
not be affected by a further modication of the character pitch. The command ESC D
NUL (without parameters) clears all horizontal tabs. When the printer is turned on or
initialised, tabs are set at intervals of 8 Pica characters, i.e. at intervals of 8/10 of an
inch.
ESC e NUL n Set horizontal tabs increments
Format:
ASCII: ESC e NUL n
decimal: 27 101 0 n
hexadecimal: 1B 65 00 n
Comment:
Horizontal tabs are set at regular intervals of “n” spaces. The maximum value that can
be set depends on the current character width and is 21, 25 and 36 at 10 CPI, 12 CPI
and condensed mode respectively. Default value at 10 CPI is n = 8.