Dahua Technology LE-L - Manual (Page 31)

31
4 HDD Series
2 HDD Series
Figure 3-3
3.7.2 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
X286H286H286H
Figure 3-4
X
.