Owner manual

response will be extremely fast, on the order of 2 milliseconds, if the input signal

has a fast decaying envelope and upwards of 2 seconds if the input signal has a

slow decaying signal. Downward Expansion takes place when the input signal level

drops below the preset threshold. For example: if the threshold is set for 0db and

input signal of 0db with produce no expansion. As the input signal drops below 0db

downward expansion starts and increases exponentially the farther the input signal

drops below the threshold point. The graph below shows the response of the

Expander with a 0db threshold.

To set up the Decimator ProRack G for proper operation first determine the

reference level of the system that the Decimator will be connected to. Most

professional products operate at a +4dbu reference level. Music equipment

typically operates at –10dbu. Once the proper reference level is determined set the

reference level switch on both channels accordingly. (Note: Both Channel One and

Two must be engaged.)

The GAIN REDUCTION meter on each channel indicates the

amount of gain reduction in decibels that the downward

expander is providing at any time.

SETTING THE DECIMATOR THRESHOLD

The THRESHOLD control adjusts both the expander and

dynamic filter sensitivity. Start by setting both the Threshold

and Filter Tracking for minimum, full counterclockwise. Turn

the Threshold control clockwise until the desired effect of the

downward expander is achieved. The expander should start to

operate when there are gaps in the audio or as the input signal

gets close to the noise floor. NOTE: Setting this control to high

will cause the expander to start to cut off the input signal to

soon.