Tektronix 2445, Инструкция по эксплуатации, Страница: 152 / 351

Maintenance— 2445 Service
“D” is the DAC Multiplexer code used to select pot AA
(see Table 6-9).
Table 6-8
Potentiometer Code Numbers
“EEE” is the DAC value (in hexadecimal) associated with
pot AA.
“FF”
is the code of the previously-activated potentiome­
ter (see Table 6-8).
“GG”
is the row code of the most-recent!y-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.
Code Number Potentiometer
01 HOLDOFF
02
Trigger LEVEL
03
SEC/DIV VAR
04 Horizontal POSITION
05 A
(A section)
06 A
(B section)
07 A REF OR DLY POS (A section)
08 A REF OR DLY POS (B section)
09 CH 1 VOLTS/DIV VAR
0A CH 2 VOLTS/DIV VAR
Table 6-9
DAC Multiplexer “D” Codes
“L” is the column code for the previously-activated
switch.
N OTE
For all momentary switches (except A /B TRIG) only
the closed position will be shown in the s witch-posi­
tion code locations (H and K). The A/B TRIG switch
has both the open and the closed positions shown.
D Code
Control Indicated
0 CH 1 VOLTS/DIV VAR
1 A SEC/DIV VAR
2 CH 2 VOLTS/DIV VAR
3
A Trigger LEVEL
5 Horizontal POSITION
6
HOLDOFF
NOTE
In the case of the
A
R EF OR DLY POS and
A
con­
trols, the D code position shows the two most-signifi­
cant bits o f the 14-bit DAC output (in hexadecimal).
6-15