Dahua Technology DH-XVR1B04H User Manual

User’s Manual
341
 Antenna feed cable lightning arrester: It is suitable for antenna system of the transmitter or the
device system to receive the wireless signal. It uses the serial connection too.
Please note, when you select the lighting arrester, please pay attention to the port type and the
earthing reliability. In some important environment, you need to use special shielded cable. Do not
parallel connect the thunder proof ground cable with the ground cable of the lightning rod. Please
make sure they are far enough and grounded respectively.
Appendix 7.2 The Earthing Modes
We all know the earthing is the most complicated technology in the electromagnetism compatibility
design since there is no systematic theory or module. The earthing has many modes, but the selection
depends on the system structure and performance.
The following are some successfully experience from our past work.
 One-point ground: In the following figure you can see there is a one-point ground. This
connection provides common point to allow signal to be transmitted in many circuits. If there is
no common point, the error signal transmission occurred. In the one-point ground mode, each
circuit is just grounded only and they are connected at the same point. Since there is only one
common point, there is no circuit and so, there is no interference.
One-point ground
 Multiple-point ground: In the following figure, you can see the internal circuit uses the chassis
as the common point. While at the same time, all devices chassis use the earthing as the common
point. In this connection, the ground structure can provide the lower ground resistance because
when there are multiple-point grounds; each ground cable is as short as possible. And the parallel
cable connection can reduce the total conductance of the ground conductor. In the high-
frequency circuit, you need to use the multiple-point ground mode and each cable needs to
connect to the ground. The length shall be less than the 1/20 of the signal wavelength.

Dahua Technology DH-XVR1B04H Specifications

General

Aspect ratio	16:9
Certification	FCC: Part 15 Subpart B CE: CE-LVD: EN 60950-1/IEC 60950-1 CE-EMC: EN 61000-3-2, EN 61000-3-3, EN 55032, EN 50130, EN 55024 UL: UL 60950-1
Product color	Black
Rack capacity	1U
Playback modes	Fast, Next, Pause, Play, Previous, Repeat, Shuffle, Slow, Stop, Zoom
Backup function	Yes
Channels quantity	8 channels
Multi-display modes	4, 8
Video capturing speed	60 fps
Maximum recording time	1 h
Audio formats supported	AAC, G.711, PCM
Network connection type	RJ-45
Maximum video resolution	1920 x 1080 pixels
Video compression formats	H.264, H.264+, H.265, H.265+
Analog signal format system	NTSC, PAL
Video capturing speed (PAL)	30 fps
Playback resolutions supported	1920×1080, 1280×1024, 1280×720
BNC input ports	8
BNC output ports	1
USB 2.0 ports quantity	2
HDD interface	Serial ATA
Maximum HDD capacity	6000 GB
DC voltage	12 V
Power supply type	DC
Power consumption (typical)	10 W
Package weight	1000 g
Storage temperature (T-T)	-20 - 70 °C
Operating temperature (T-T)	-10 - 45 °C
Storage relative humidity (H-H)	0 - 90 %
Operating relative humidity (H-H)	10 - 90 %
Number of users	128 user(s)
Ethernet interface type	Fast Ethernet
Supported network protocols	HTTP, HTTPS, TCP/IP, IPv4/IPv6, UPnP, RTSP, UDP, SMTP, NTP, DHCP, DNS, IP Filter , DDNS, FTP, Alarm Server, P2P, IP Search

Weight and Dimensions

Depth	192 mm
Width	197 mm
Height	41 mm
Weight	540 g