Tektronix 5441 Instruction Manual page 101

GROUND
+5V PWR SUPPLY
+15V PWR SUPPLY
-15V PWR SUPPLY
EXT. ROW 2
EXT. ROW 1
EXT. COLUMN 2
EXT. COLUMN 1
NOT USED
40V LINE FREQ.
TS4
TS1
TS9
TS8
TS2
TS3
TS5
TSlO
TS6
TS7
TRAPEZOID
END-OF-WORD
TRIGGER
Fig. 6-2. Connector pin assignments (view looking at rear panel of 5441).
PROGRAMMING
The 541 1 Readout system is programmed by resistors,
which are connected between Time Slot lines and Row or
Column lines. The resistors are chosen according to the
character displayed or the operation performed. For the val-
ues of programming resistors, see Fig. 3-8 (the Character
Selection Matrix). All programming resistors smaller than
51
kR
and larger than 13
kR
should be lo/' tolerance or bet-
ter; all others can be 5% or less.
To illustrate resistor selection, consider the display
"TEST 1" in EXT. 1. Required resistor values are shown in
Table 6-1.
In Table 6-1 the Matrix indicates, for example, that the
character "T" is programmed by Column 9 and Row 4. The
Selection Matrix also indicates that a 16.5 ki2 resistor is re-
quired for Column 9 while 51
kR
is required for Row 4. To
obtain the space before the 'I", the 'ADD SPACE" opera-
tion is used.
The choice of Time Slots depends on the desired position
of the character within the word. Programming the first
character from TS1 displays that character in the left-most
character position of the display word. Similarly, program-
ming the first character from TS2, TS3, or TS4 displays that
character in the second, third, or fourth position within the
display word respectively. Programming the first character
Character
Table 6-1
RESISTOR PROGRAM FOR "TEST
1"
--
-
-
-
--
r - - - -
I - - -
I -
9
10 37.4 k 0
1 150 kR 37.4 kt2
9 16.5
kR
51 kil
0 Open 16.5
kQ
2 75
kR Open
REV MAY 1982