Connecting devices, 1. 4 channel premium dvr – CNB HDS4848E User Manual
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2. Connecting Devices
2-1. 4 Channel Premium DVR
The rear panel of the 4 channel premium DVR comprises the following: 
 
 
• Front USB: Two USB ports are provided to connect external devices like HDD, Flash memory 
for Backup, System upgrade or USB mouse on the front panel. 
 
Video Input 
Connect the coaxial cables from the cameras to the BNC video 
connectors. 
 
 
 
 
 
 
 
 
 
Audio Input 
The DVR can record audio up to 4 sources. Connect the audio sources to the 
Audio-In RCA connectors. All channels need external pre-amplifiers. 
It is the user's responsibility to determine if local laws and regulations permit 
recording audio. 
 
 
 
 
 
Audio Out 
The DVR does not have amplified audio output, so you will need a speaker with 
and amplifier. 
 
 
 
