Safety First!
Before installing the SP-DSP card, please
read this Quick-Start Guide carefully and keep
it for future reference.
CAUTION!
This circuit board is
static sensitive, and is packed in
an anti-static bag. Please use
anti-static precautions when
handling the SP-DSP card, such as the use of
an electrically grounded wrist band and anti-
static mat.
WARNING!
These servicing
instructions are for use by
qualified personnel only. To
avoid electric shock, do not
perform any servicing other than that
contained in the Operating Instructions
unless you are qualified to do so. Refer all
servicing to qualified service personnel.
Make sure the power is off and the power cord
disconnected before removing the top cover to
gain access to the inside of the SP2400.
Mackie Industrial strongly recommends that
this circuit board be installed only by a
professional technician, sound installer, or
contractor with electronic servicing experience.
1. Never open the SP1200/SP2400 with the
power supply on.
2. After installing the SP-DSP1 card, and before
applying power to the SP1200/SP2400,
make sure the cover is properly installed
and that no wires are pinched between the
cover and chassis.
The SP-DSP1 is a
real-time digital
signal processor that
can be installed in
the SP1200 or
SP2400. It uses a
proprietary algorithm
to sense noise in a
room and adjust the
gain of the program
source accordingly.
This unique approach effectively "nulls out"
the music sensed at the ambient microphone,
allowing the DSP to measure the actual
ambient noise level in the room. As the noise
level increases, the gain of the music
automatically increases to compensate for the
increased noise.
TXD
L/R
RXD
GND
+5V
+5V
GND
+5V
J4
DSP
EEPROM
J3
J1
U13
U16
U14
U12
U8
U9
U3
U4
U1
U11
U7
U5
U10
U6
U2
U15
U17
U18
J2
