Philips PM2517E - B I O C K D I a G R a M O F D I G I T a L S E C T I O; D a T a S I G N a L S E X a M P L E S; D I S M a N T L I N G T H E P L V; F a U L T F I N D I N G B L O C K D I a G R a

46
3.4.3.3. Truth table of the
oa
0055
Function
Blank
lpos.,
tneg.,
Outputs
Display
readrng
Blanking
+
999.9
mV
+
9.999
V
+
99.99
V
+
999.9
V
-
999.9
mV
-
9.999
V
-99.99
V
-999.9
V
o
999.9
fl
9.999
kQ
99.99 kQ
999.9
kQ
9.999 t\4Q
-
999.9
mV
-
9.999
V
-
99.99
V
-
999.9
V
lpos.,
I
neg.,
+
99.99 mA
+
9.999
A
-99.99
mA
-9.999
A
i
999.9
-999.9
I
+oa
Logic
1
=
0
Vv
Logic0
=-8.5V
Logic X
=
irrelevant
-
For
a liquid
crystal
display, signal DS2
is
a
square
wave
-
For
a common
cathode
LED display
signal
DCL is
Logic 0
-
For
a common
anode LED display
signal
DCL
is
Logic 1
In function
|
,
the
mV indication
is
suppressed
by
a switch
in
the
Pl\4
2517E.
In function
V- and mA- the
-indication
is
not
used
in the
Pl\4
2517E.
000000
0001 100
000000
0001 0
r
0
0
0
010 1xx
I
0 00
r
0 l xx
0
OFc\cY)
E){CE..:z
ooÖo
oco<
9
<.ooo
zzz
o
000000
0000
000
X
O O
O
X
XXX
X
110000
0001
100
010000
0'l
00
100
010000
0010
100
010000
0001
100
0 1000
000
1
0 1000
001
1
0 1000
010
1
0 1000
011
1
110000
0001
010
010000
0l00
010
010000
0010
010
010000
0001
010
0 1000
000
0
0 1000
001
0
0 100
0 0't 0
0
0 1000
011
0
000100
0001
000
000101
0100
000
000101
0010
000
000101
0001 000
00011 0 0100
000
0
0100 111
x
0 0100
000
x
0 0100
001
x
0 0100 010
x
0 0100 Jll
x
l't 0000 0001
00'l
010000 0100
001
0l0000
0010
001
010000
000r
001
0
1100
000
x
0 lt 00 001
x
0
1100
0
r
0
x
0
1100
011
x
101000 0010
100
00't 000 0100
100
0 1010 001 1
0
1011 011
'1
0010
010
001000 0100
0100 101'1 011
0
00
0010 00r
001000 0100 001
0
1111
011
X
110000 0001 1000
01'l
0 1xx
1