Alesis ProLinear DSP, Reference Manual

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Operations
2
Input Level Mode
The ProLinear DSP has an extremely useful feature called
Input Level mode that can help you optimize the speaker’s
performance. This mode allows you to measure the level of
the incoming signal, which in turn makes it possible to adjust
the rear panel Input Level control to its ideal position.
In addition to allowing you to achieve maximum signal
integrity for an individual speaker, Input Level mode can also
be used:
1.
To be certain that all ProLinear DSP speakers in the
system are at the same level, and
2.
To be certain all speakers are operating at an optimal
signal-to-noise ratio (SNR).
To optimize your setup, you need to send a constant, steady
signal to the ProLinear DSP speaker. Most audio engineers
would send the unit pink noise, white noise or a sine wave. We
recommend that you purchase a reference CD containing
these and other signals commonly used for level calibration.
It’s very difficult to calibrate any professional audio device
using regular music or program material.
To use Input Level mode:
Hold for three
seconds
•
Starting from within Program mode, press and hold
the Page button for three seconds. The following
display is an example of what may be shown:
•
Once this display is showing, reach around to the
back of the ProLinear DSP and set the Input
Level control to its minimum position.
•
Select a test tone that has a level very close to 0dB
on the CD player and send it to the speaker.
•
Slowly increase the Input Level control until the
display reads -10dB.
To exit Input Level mode, hit the Page button again.
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