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2 audio output, 7 alarm input and output connection, Audio output – Dahua Technology LE-A User Manual

Page 25: Alarm input and output connection

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Figure 3-3

3.6.2 Audio

Output

The audio output signal parameter is usually over 200mv 1KΩ (BNC). It can directly connect to
low impedance earphone, active sound box or amplifier-drive audio output device.
If the sound box and the pick-up cannot be separated spatially, it is easy to arouse squeaking. In
this case you can adopt the following measures:
z

Use better sound pick-up with better directing property.

z

Reduce the volume of the sound box.

z

Using more sound-absorbing materials in decoration can reduce voice echo and improve

acoustics environment.

z

Adjust the layout to reduce happening of the squeaking.

Please refer to

X286H286H286H290H

Figure 3-4

X

.

Figure 3-4

3.7 Alarm Input and Output Connection

Please refer to the following sheet for alarm input and output connection. See

X287H287H287H291H

Figure 3-5.

X