RTS KP-4016, Техническое руководство

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188 KP-4016/5032 Menu System KP Series
Bosch Security Systems, Inc. Technical Manual F.01U.304.914 Rev. 05
AGC
The AGC ( Automatic Gain Control) menu is used to set the speed at which a microphone becomes active and the speed at
which a sustainable level is achieved through the use of the Attack menu and the Decay menu. You can set these levels for the
front, rear, and headset microphones used with the keypanel.
Attack
The Attack menu item is used to set the speed at which the microphone gets to the activation threshold, the point where
the circuit determines if the noise is a voice. The smaller the attack time, the faster the mic turns on.
Available options for this menu are:
0.5ms
1ms (default)
2ms
Decay
The Decay menu item is used to set the speed at which the gain transitions to silence during release.
Available options for this menu are:
500ms
750ms (default)
1000ms
To configure the attack speed for a microphone source , do the following:
1.
Starting at the Audio Options|Advanced|AGC menu, select Attack .
2.
Press the SEL button .
Front Hdst, Front Mic, Rear Hdst, and Rear Mic appears in the panel display.
3.
Using the arrow buttons, select Front Hdst , Front Mic , Rear Hdst , or Rear Mic .
4.
Press the SEL button .
The Fast Attack Speed scroll box appears in the panel display.
5.
Using the arrow buttons, select the Attack speed you desire.
FIGURE 91.
Automatic Gain Control Example