Tektronix 4010 Maintenance Manual page 26

Characteristics-4010 Maintenance
Options, Strappable. See Table 2-13 for strappable
options for the basic 4010/4010-1; see interface unit
documentation for strap option information pertaining to
interface units.
Pagefull. A condition occurring in Alpha Mode when
line-feeding past the 35th line. It causes Margin 1 to occur
(center of screen) if Margin
~
had been set, and vice-versa.
Margin 1 can cause a terminal busy signal, if selected by
option on TC-2.
Physical Characteristics. See Table 2-11.
Point (Tekpoint). The basic unit of measurement for
Graph and Gin Modes. 1024X (0-1023) and 1024Y
(0-1023) points addressable; 1024X and 780Y viewable.
Point spacing is approximately 0.18 mm. (Approximately
54.5 points per cm.) (Terminal adjusted as outlined in the
adjustment procedure.)
Power Supply Specifications. See Table 2-10.
Receive Rate. Capable of ;;;;'12,000 words per minute
(average of six characters per word). Interface dependent.
Resetting Gin to Alpha Mode. Gin Mode is cancelled and
Alpha Mode reset upon receipt of CR or ESC FF from the
computer. Resets to Alpha (without transmitting to com-
puter) in response to entering PAGE or RESET at the
keyboard. Terminal also resets to Alpha Mode after
completing Gin transmitting function. Refer to Table 2·6
for details.
Resetting Graph to Alpha Mode. Graph Mode is can-
celled and Alpha Mode reset in response to US, CR or ESC
FF from the computer. It can also be reset by entering
PAGE or RESET at the keyboard.
Resetting Home Position. The Terminal display resets to
home position (top-left of display) in response to ESC FF
from the computer. It also resets to home position in
response to an LF past line 35 if Margin 1 exists and the
TC-l option is set so that line feed causes carriage return.
Home position also occurs when PAGE or RESET is
entered at the keyboard.
2-6
Resetting Margin 1 to Margin
0.
Margin 1 (horizontal
center of display) resets to Margin
~
(left edge of display) in
response to ESC FF from the computer, or in response to
an LF (line feed) past the 35th line. Margin
~
also occurs in
response to PAGE or RESET entered at the keyboard.
Space. An Alpha Mode measurement made from a
reference point in a character to the same reference point in
a horizontally adjacent character. A space is equal to 14
Tekpoints, which equates to approximately 2.6 mm
(0.1 inch). There are at least 72 spaces per line.
Status Bits. Bits transmitted in Gin Mode to denote the
status of the Terminal. They are transmitted as part of a
response to an ESC ENQ received while in Alpha or Graph
Mode, and consist of the following:
Bit 8
=
1, Bit 7
=
f1,
Bit 6
=
1.
Bit 5
=
Hard Copy Unit status;
a
is intended to mean that
the Hard Copy Unit is in working order, ready to
accept a hard copy request. (With 4610 connected,
it means that the 4610 Hard Copy Unit is connected
and energized.)
Bit 4
=
Vector Status indicator. A 1 indicates that the
Terminal is set up to draw vectors.
Bit 3
=
Graphic Mode indicator. A
0
indicates that a graphic
mode exists. 1 indicates Alpha Mode.
Bit 2
=
Margin Indicator. 1 indicates that Margin 1 exists.
f1
indicates Margin
rI.
Bit 1
=
Auxiliary device indicator.
f1
indicates that some
optional auxiliary unit is activated.
Strappable Options. Optional operating features which
can be selected by connectors within the Terminal. See
Table 2-13.
Tekpoint. A unit of measurement associated with
TEKTRONIX Terminals. It consists of the distance
between two adjacent points in the 1024 x 1024 grid
provided by the X and Y registers. See Point.
®