Datasat RS20i Specifications download pdf (Page 89)

RS20i Installation and Operating Guide Page 89

RS20i Installation & Operating Guide Document # 9301H52900 Ver. 1.01

4.3.8.4.1. Signal flow

When implementing crossovers or im

plementing different internal routing on the RS20i, the input

channel numbers do not match the output channel numbers. The following explanation clarifies how the

menus operate regarding the channel numbers.

1. From a user perspective, the channel mapping occurs near the last stage of the signal

processing. Only high pass and low pass filters are applied after the signal routing occurs.

This is illustrated in the diagram below.

Figure 68. Signal Processing Flow Diagram

2. VU meters on the Home screen show the input channel name while showing the VU level

of the sum of the outputs for that crossover channel.

4.3.8.4.2. High Pass and Low Pass Shelf

The High Pass and Low Pass Shelves are for active cr

ossover systems. The High Pass is the portion of

the sound spectrum that is going to find its way to the top-end compression driver. The Low Pass is the

portion of the sound spectrum that is going to find its way to the mid-woofer.

Since there are 16 output channels available, you have the option to use them any way you like. Suppose

you actually have six channels of incoming sound, then you have 10 other D/A converted outputs that

can be used as crossovers. All you need to do is identify which channels will be used as crossovers.

Setting up your system in this way, lets you do away with passive crossovers. Although you would need

more amplifiers, it does give you much tighter control of your system.

You can also decide how steep the High Pass or Low Pass cut-off is. The conventional values are 6, 12,

18, and 24 dB. As the numbers go up, the cut-off is steeper.

Note: Set up the crossovers before you run the Dirac software. The Dirac software will

fine-tune the characteristics of the crossover point. If a driver has issues with time

alignment, or encounters an aberration of some sort that can be measured, it will do its best

to correct for it. It will also adjust all the amplitudes to their appropriate values to get a

smooth response within that range.

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Datasat RS20i Specifications Page 89