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3. Installation
Figure 4. Basic connection diagram
The NEDSP1061 module is inserted into the path of noisy
audio. Using the input and output level controls allows
the unit to appear transparent to the audio signal.
NEDSP1061
Power amp
Pre amp
Audio in
Audio out
NEDSP1061
Power amp
Audio out
Microphone
Microphone
Pre amp
Audio in
Audio out
Pre amp
Power amp
NEDSP1061
Place NEDSP1061 module
in place of the coupling
capacitor
Figure 5. NEDSP1061 Audio path
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l
e
v
e
L
3
P
J
2
P
J
1
P
J
1
n
O
n
O
n
O
2
n
O
n
O
f
f
O
3
n
O
f
f
O
n
O
4
n
O
f
f
O
f
f
O
5
f
f
O
n
O
n
O
6
f
f
O
n
O
f
f
O
7
f
f
O
f
f
O
n
O
8
f
f
O
f
f
O
f
f
O
4.3
Remote setting of DSP filter level.
Remote setting of the DSP level can be achieved through
the PCB connections. This allows the DSP filter level to
be changed during operation. If remote DSP setting is
used, remove the jumpers from the module.
These connections are connected directly to the DSP.
The logic levels of the DSP are 3.3V, do not apply a
voltage greater than this.
To set the DSP level remotely connect the pins N0, N1
and N2 (PCB pins 1,2, and 3) as shown on the following
page.
Table 4. Preset DSP levels using on board jumpers.
