3 specification, 1 4 hdds series, Specification – Dahua Technology HE-T User Manual
Page 11: 4 hdds series

11
z
Network operation
Support network remote real-time monitor, remote record search and remote PTZ control. 
 
z
Alarm activation function
Several relay alarm outputs to realize alarm activation and on-site light control. 
The alarm input port and output has the protection circuit to guarantee device safety. 
 
z
Communication port
RS485 port can realize alarm input and PTZ control. 
RS232 port can connect to keyboard to realize central control, and can also connect to PC COM 
to upgrade system and realize maintenance, and matrix control. 
Standard Ethernet port can realize network access function. 
 
z
PTZ control
Support PTZ decoder via RS485. 
Support various decode protocols to allow the PTZ to control the speed dome. 
 
z
Intelligent operation
Mouse operation function 
In the menu, support copy and paste setup function 
 
Slight function differences may be found due to different series.
1.3 Specification
1.3.1 4 HDDs Series
Parameter
4-ch with audio 
4-ch without audio 
8-ch with audio 
8-ch without 
audio 
16-ch with audio 
16-ch without audio 
Main 
Processor 
High-performance industrial embedded micro controller
OS
Embedded LINUX
System 
Resources 
Multiplex operations: Multiple-channel record, multiple-channel playback 
and network operation simultaneously 
Interface
User-friendly graphical user interface
Input 
Devices 
Front panel, USB mouse, remote control
Input 
Method 
Arabic number, English character, donation and extension Chinese 
(optional) 
 
System 
Shortcut 
Function 
Copy/paste operation, USB mouse right-key shortcut menu, double click 
USB mouse to switch screen. 
Video 
Compressio
n 
H.264
Compression 
Standard 
Audio 
Compressio
n 
G.711A
 
 
 
 
Video Input
4-CH composite video 
input: (NTSC/PAL) 
BNC (1.0V
P- P,
B
75Ω)
8-CH composite video 
input: (NTSC/PAL) 
BNC (1.0V
B
P- P,
B
75Ω)
16-CH composite 
video input: 
(NTSC/PAL) BNC 
(1.0V
B
P- P,
B
75Ω)
