DSP board (leave disconnected if installing
only one DSP card). Route the cable
between the two heatsinks.
TO DSP BOARD
FRONT PANEL
LED BOARD
TO CPU BOARDS
J4
Reinstall the Top Cover
14. When placing the top cover back onto the
chassis, be sure all the wiring is properly
routed between and beside the heatsinks
to avoid pinching the wires between cover
and chassis. Replace the screws in the
same order in which they were removed.
Using the SP-DSP1 Card
It is important to understand that the
SP-DSP1 does not add gain to the signal path,
but rather attenuates the signal at its input by
a user-adjustable amount, and then applies
less attenuation to the signal to achieve an
increase in volume as determined by the
Ambient Noise Sensing Algorithm.
The default Minimum Gain setting is –40 dB,
so the signal level is 40 dB lower with the
SP-DSP1 card installed than it is without the
card installed (or with the circuit bypassed).
At first, you may wonder why the signal level is
so low when you first turn on the SP2400
because of this additional attenuation.
However, after the parameters are properly
adjusted and you run the Auto Calibration
procedure, the SP2400 will operate with
sufficient volume.
Note:
The SP-DSP1 requires connecting a
microphone to the AMBIENT MIC connection
on the rear panel of the SP2400. We
recommend using the Mackie Industrial
MT-3100 omnidirectional condenser
microphone. However, if the installer
determines that a directional microphone is
better suited to the application, such as the
Mackie Industrial MT-3200 semi-cardioid
condenser microphone, it may be used as well.
Be sure to move the AMP ADDRESS switch
#8 up to activate the ambient microphone.
Installing the Software
The SP-DSP1 is designed to run under the
Palm™ OS. The SP-Control™ Palm
application is included on a 3.5" floppy disk,
and it can also be downloaded from the
Mackie Industrial website
(www.mackieindustrial.com).
Copy the "SP-Control.prc" file from the
floppy disk to the hard drive on your computer
where the Palm Desktop Application is
installed. Double-click on the "SP-Control.prc"
file, and the "Install Tool" dialog box opens to
let you know that the file will be installed on
your handheld Palm the next time you
perform a HotSync operation.
Using the SP-Control Application
Once the "SP-Control.prc" file has been
installed on the Palm, you can connect the
Palm to the COMM PORT on the SP2400. Use
the supplied 9-pin “null-modem” adapter
between the Palm’s HotSync cable and the
SP2400’s COMM PORT. This switches pins 2
and 3 (RXD and TXD) on the RS-232
connection so the two devices can
communicate properly.
Select the "SP-Control" application on the
Palm to launch it, and the main SP-Control
window appears on the screen. Click the
“Connect” box to begin communication
between the application and the SP-DSP1.
There are six user-adjustable parameters and
four bar graphs indicating relevant levels.
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