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THEORY OF OPERATION
INSTRUCTION
MANUAL
0lgit.l
uultlme1.r
Models
172A. 173A
.i.
Function
Switching.
TABLE 5-7.
Function
Selection.
FUNCTION SWITCHES
FUNCTION LINES
(UVOi)
FUNCTION
v
DC/AC
A
R
HI/LO
R
AC/DC
VI
DCV -
IN
3UT
OUT
OUT
X
+8v
+Ev
+8v
DCI
IN
OUT
IN
OUT
X
+Ev
+8v
+8v
(172A)
OV (173A)
ACV
OUT
IN
OUT
OUT
X
+Ev
ov
+Ev
ACI
OUT
IN
IN
OUT
X
+8v
ov
'2
11:::1
HIR
OUT
OUT
X
IN
OUT
ov
ov
+8v
LOQ
OUT
OUT
X
IN
IN
ov
+8v
+8v
X 5 DON'T CARE
Function
selection
is
accomplished
by connecting
function
lines
R, AC/DC,
& VI
according
to Table
5-7.
The function
lines
are
level
sensitive.
*'STORE
-
DiGITAL
A/D CAL
SECTION
0
t
A/D S,G-
BUFFER
ACT.
-
INT.
-
CONPARATOR
AZ I-
AZ 20
I
t
r"'
b$
Mb.NY
"AH"
OUTPUTS
,NP"TS
REF.,.
-
I SW
DRIV.
4
I
I
b
CLOCK
A-CAL
STORE
-
FIGURE s-12.
Simplified
Block
Diagram
of
A/D
Converter.
r
5-14
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