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5.1. Channel Parameter
The menu for channel parameters includes audio parameter, RS485 parameters, and video encode format,
etc. Please refer to the section 4.1.9. Video stream of this manual.
5.1.1. Audio Parameter Setting itd.
Select the menu “Channel parameters -> Audio parameters” to set up audio format, audio amplification
times, and audio voice channel mode, etc., as shown below:
Fig. 48.
Audio parameters are shown in the table below:
Item
Parameter
Application and explanation
Audio format G.711(MULAW),
G.711(ALAW) AAC, MP2
More custom-made audio compression formats can be added
according to user requirement.
Audio mode
Left Channel, Right Channel,
Stereo
Channel mode selection is mainly the difference between single
channel and dual channel.
Note:
The device audio is passive linear audio I/O. When connecting any external audio I/O, it is required to select
an active audio I/O device, e.g. active monitoring sound pickup, active sound box, etc. If the sound volume is
small, it is able to adjust audio amplification times or add power amplification devices.
5.1.2. RS485 Parameters
Select the menu Channel -> RS485 to set up RS485’s parameters like port control protocol and bit rate, etc.
Fig. 49.
RS485 parameter comparison table is as below:
Item
Parameter
Application and explanation
Address 1 – 255. Default to be 1
Address number for the PTZ or lens decoder
Bit rate
50 – 115200.
Default to be 9600.
Same as the settings of the PTZ or lens decoder.
Protocol
Pelco-D_1 etc.
Same as the settings of the PTZ or lens decoder.
Pelco_1 is recommended.
Data bit
5, 6, 7. 8. Default to be 8.
Default to be 8. Normally do not change it.
Check
bit
No check, odd parity,
even parity
Default to be no check. Normally do not change it.