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amplifier from DCS, and back to DCS after amplifying, the audio can’t be played due to the loop or

device fault. Check box which shown as means enable, and means disable. If the actual

use of amplifier is two channels or four channels, channel number in odd, such as No. 1, 3, 5,etc

should be enabled during the device fault setting. Channel number in even can’t be selected,

otherwise the supervision will be incorrect.

6． AVC

The AVC Setting function allows users to set the parameters for the AVC, as shown below:

 AVC Input

Select the AVC input channel, which should be matched with that in supervision module, and

check the box to enable the AVC function of the selected channel. If channel is not equipped with

noise detector, it can’t be selected.

“Calculation” describes when there are many noise detectors in one line, the device can

automatically volume control (AVC) according to average or maximum value.

 AVC Parameter Setting

 “Sampling Period” is the supervision cycle of ambient noise. Its setting range is related to

the No. of connected modules of device.

 “Sensor Deviation” means the deviation between the actual sound pressure level and the

one measured by noise detector. Actual sound pressure can be measured by the sound

pressure meter. Constant audio signal, such as white noise and sine wave can be played

during the commissioning. Then the deviation can be got through measuring by the

device and sound pressure meter. Any interference is forbidden during the measurement.

 “Reaction Level” with the unit of dB is the bound value to enable the AVC function. When

the sound pressure is equal or greater than this value, AVC function is enabled to adjust

output volume automatically. When it is less than the bound value, the output volume is

the minimum value.

 “Level deviation (min)” is used to set the minimum volume of the adjusting range.

 “Level deviation (max)” is used to set the maximum volume can be adjusted through the

AVC.

 “Factor” provides the function to set the volume adjusting ratio, same kind of sound

change, the bigger the adjusted ratio, the bigger the volume change.

Honeywell X-DCS3000 User Manual

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