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1-12
OMM-C signal strength at MI 120 test points
OMM-C signal strength at MI 120 test points
A voltage proportional to the strength of the signal
received by each OMM-C is available at three
interface test points T1, T2 and T3.
Approximately 1 V corresponds to the minimum
receivable signal, and 4 V corresponds to the
maximum receivable signal.
MI 120 output drivers
V
O
H
t a I
O
H
=
2
0
m
V
O
H
a
I t
O
H
=
4
0
m
V
O
L
t a I
O
L
=
1
0
0
OH = output high
OL = output low
Vs = Voltage supply 15 V - 30 V
M
i
i n
m
u
m
V
s
2 -
A
A
V
s
2 -
7 .
m
A
T
1
T
2
T
3
T
y
p
c i
l a
M
a
i x
m
u
m
V
s
1 -
7 .
V
s
2 -
3 .
1
1
5 .
T3
T2
T1
O
O
O
O
M
M
-
C
1
S
g i
n
l a
t s
0
V
C
o
m
m
o
O
M
M
-
C
2
S
g i
n
l a
t s
U
i n
s t
V
V
V
e r
n
g
h t
n
e r
n
g
h t
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