Page 8
+
+
1
2
3
4
5
6
7
8
9
10
JP3
JP1
JP2
Connections
Do not
Connect
these
pins
Mounting
holes
(4 off)
Input
level
Output
level
Noise cancellation
level jumpers
Top
Figure 3. NEDSP1061 connections and controls
2.2
Module Layout.
The following diagram shows the layout of the
NEDSP1061 module.
.
o
N
n
i
P
e
m
a
N
n
o
i
t
p
i
r
c
s
e
D
1
0
N
t
i
b
n
o
i
t
a
ll
e
c
n
a
c
e
s
i
o
n
b
s
l
D
C
B
2
1
N
t
i
b
n
o
i
t
a
ll
e
c
n
a
c
e
s
i
o
n
D
C
B
3
2
N
B
S
M
n
o
i
t
a
ll
e
c
n
a
c
e
s
i
o
n
D
C
B
4
C
/
N
t
c
e
n
n
o
c
t
o
n
o
D
5
n
i
V
e
g
a
t
l
o
v
y
l
p
p
u
S
6
C
/
N
t
c
e
n
n
o
c
t
o
n
o
D
7
V
0
n
o
i
t
c
e
n
n
o
c
V
0
8
f
f
o
N
n
i
p
f
f
o
/
n
o
n
o
i
t
a
ll
e
c
n
a
c
e
s
i
o
N
9
n
I
t
u
p
n
i
o
i
d
u
A
0
1
t
u
O
t
u
p
t
u
o
o
i
d
u
A
Table 1. NEDSP1061 connection functions
Page 17
5.2
Remote adjustment of noise cancellation
level.
NEDSP 1061
N0
1
N1
2
N2
3
0V
7
0V
C
1
2
4
BCD
Complement
switch
This page illustrates various options for altering the DSP
level remotely, during operation.
Figure 8. Basic setting using a BCD switch
NEDSP 1061
N0
1
N1
2
N2
3
0V
7
1
2
4
0V
Note:
Inputs
will be inverted
N0
N1
N2
Figure 9. Basic setting using transistors
The transistors allow interfacing
with higher voltages to control the
DSP level. These could be
replaced by opto couplers for
greater isolation.
