Tektronix 2465B Service Manual

Maintenance—2465B/2467B Service
"BB" is the current value (in hexadecimal) of pot AA.
See Table 6-9 for the approximate range of codes for the
CCW (counter clockwise) and CW (clockwise)
potentiometer rotations.
"CC" is the previous value (in hexadecimal) of pot AA.
"D" is the DAC Multiplexer code used to select pot AA
(see Table 6-9).
"EEE" is the 12-bit DAC value (in hexadecimal)
associated with pot AA. See Table 6-9 for the
approximate range of codes for the CCW (counter
clockwise) and CW (clockwise) potentiometer rotations.
"FF" is the code of the previously-activated
potentiometer (see Table 6-9).
"GG" is the row code of the most-recently-activated
switch (see Table 6-10 for definition of row codes).
"H" is the switch-position code: 0 for open; C for
closed.
"I" is the column code of the most-recently-activated
switch (see Table 6-10).
"JJ" is the row for for the previously-activated switch.
"K" is the switch-position code: 0 for open; C for
closed.
"L" is the column code for the previously-activated
switch.
NOTE
For all momentary switches (except A/B TRIG) only
the closed position will be shown in the switch-
position code locations (H and K). The A/B TRIG
switch has both the open and the closed positions
shown. (MIN). Maximun intensity is at both the
CCW and CW positions.
Table 6-9
Potentiometer Codes and Values (Exerciser 01)
Rotation Values
CCW
BB
FF
FF
00
FF
00
00
00
00
FF
FF
FF
FF
FF
FF
FF
FF
80
DEEE
6FFF
3FFF
1000
5FFF
0000
0000
0000
0000
07FF
27FF
OFFF
1FFF
27FF
37FF
4FFF
5FFF
b
6800
CW
BB
00
00
FF
00
FF
FF
FF
FF
00
00
00
00
00
00
00
00
FF
DEEE
6000
3000
1FFF
5000
3FFF
3FFF
3FFF
3FFF
0000
2000
0000
1000
2000
3000
4800
5FFF
b
6FFF
Potentiometer
AA
Code
01
02
03
04
05
06
07
08
09
0A
11
12
13
14
15
16
17
Name
HOLDOFF
Trigger LEVEL
SEC/DIV VAR
Horizontal POSITION
A (A section
3
)
A (B section
3
)
A REF OR DLY POS (A
section
3
)
A REF OR DLY POS (B
section
3
)
CH 1 VOLTS/DIV VAR
CH 2 VOLTS/DIV VAR
CH 1 Vertical POSITION
CH 2 Vertical POSITION
CH 3 Vertical POSITION
CH 4 Vertical POSITION
TRACE SEP
READOUT INTENSITY
Trace INTENSITY
"The A REF OR DLY POS and A controls are both 180° offset
pairs that continuously rotate. Displayed BB values jump and
the AA code changes when instrument software switches
between the A and B sections. The D code position shows the
two most-significant bits of the 14-bit DAC output (in hexade-
cimal), effectively generating 5.5 turn potentiometer values.
b
The potentiometer midpoint value is 5800, and the intensity is
off (MIN). Maximun intensity is at both the CCW and CW posi-
tions.
6-16

Tektronix 2465B Specifications

General

Brand	Tektronix
Model	2465B
Category	Test Equipment
Language	English