10
SIGNAL GENERATOR
A signal generator exists on each channel with the following types of signals:
• Pink Noise - equal energy per octave noise
• Sweep - 20Hz to 20kHz sweep with 4 second per octave rate
• 100 Hz - sine wave with 100 Hertz frequency
• 1 kHz - sine wave with 1000 Hertz frequency
• 10 kHz - sine wave with 10,000 Hertz frequency
CALIBRATION MIC SETUP
• Step 1
Connect four omni-directional microphones to a microphone multiplexor
device such as the USL MMP-10.
• Step 2
Position the microphones at ear height (3.3-4 ft) in a diamond shaped pat-
tern at several locations in the seating area (not closer than 5 ft to any wall
or 16 ft from the screen).
• Step 3
Connect the multiplexor output to the mic input of the QLI-32.
• Step 4
Press the yellow SPL button to calibrate the microphone(s) driving the RTA
while the pink noise generator of the processor is enabled.
• Step 5
Adjust the Microphone Gain control until the indicated SPL matches the
SPL on a reference meter.
NOTE:
*Multiple microphone positions ensures spatial averaging and improves the
overall quality of equalization by reducing the effect of specific room modes.
*All SPL readings are C-weighted decibels at a slow polling rate.
AUTO EQUALIZATION PROCEDURE
With the calibration microphones properly placed and the microphone mul-
tiplexor connected to the QLI-32 you are now ready to run an Auto-EQ.
• Step 1
Select the Auto-EQ button on the e
qualization
page.
• Step 2
Using the drop down menus and check boxes select all the channels to EQ.
• Step 3
Select any addition parameters (Gain Smoothing/Centering) to be processed
during Auto-EQ.
• Step 4
Select “Go!”. The processor will now go through the Auto-EQ process. Allow
up to two minutes per channel to complete the process.
