Datasat RS20i Specifications download pdf (Page 72)

RS20i Installation and Operating Guide Page 72

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

Global audio delay for current input: Audio can be delayed for a selected input, if

necessary, to synchronize with a digital video projector. Use the adjustment knob to adjust

the audio delay. Delay values increase by 1 ms increments up to a maximum of 1 second.

Surround Delay: Enter the desired delay, in milliseconds, up to a maximum of 100 ms.

Select the Surround Delay box and then dial in the correct value using the front panel

adjustment knob. The surround delay is applied to the internal channels 5,6,7 and 8.

H.I. (Hearing Impaired) Delay: Audio can be delayed on the Hearing Impaired output

channel. Enter the desired delay, in milliseconds, up to a maximum of 220 ms.

Input Trim: This can be used to apply volume level trim to the current input. This may be

used in a case where you want to balance the volume level of two different sources. The

Input Trim allows you to change the master volume control level and keep the relative levels

balanced.

Surround Offset: Use the adjustment knob to adjust between -10dB to +10dB offset.

Fade In/Fade Out: During an input change, the Fade In and Fade Out period can be up to 2

seconds. Use the adjustment knob to set.

Changes happen real-time. To discard a changed setting, you must set it back to where it

was prior to the change.

4.3.6.1.1. Calculating the Surround Delay

Sound

from

the back of the theater should arrive at the listener’s ears approximately 20 ms

after the arrival of the front speaker sound. The following procedure describes how to arrive

at the correct surround delay setting.

 Measure the distance between a rear seat and the nearest surround speaker in feet. If

calculating in metric, convert meters to feet by multiplying by 3.

 Measure the distance from the same rear seat to the nearest screen speaker. If calculating

in metric, convert meters to feet by multiplying by 3.

 Subtract surround distance from the screen distance, and add 20 (screen - surround + 20).

The result is the surround delay in milliseconds.

 After setting the surround delay in the RS20i, verify the setting by listening to a familiar

soundtrack. The action on-screen should match sound in the theater.

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Datasat RS20i Specifications Page 72