Dahua nvr4208-8p User Manual

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Please refer to the following sheet for detailed information.
Item
Note
Period
There are two periods in one day. You can set different
sharpness, brightness, and contrast setup for different periods.
Effective Time
Check the box here to enable this function and then set period
time.
Sharpness
The value here is to adjust the edge of the video. The value
ranges from 0 to 100. The larger the value is, the clear the edge
is and vice versa. Please note there is noise if the value here is
too high. The default value is 50 and the recommended value
ranges from 40 to 60.
Brightness
It is to adjust monitor window bright. The value ranges from 0 to
100. The default value is 50.
The larger the number, the bright the video is. When you input
the value here, the bright section and the dark section of the
video will be adjusted accordingly. You can use this function
when the whole video is too dark or too bright. Please note the
video may become hazy if the value is too high. The
recommended value ranges from 40 to 60.
Contrast
It is to adjust monitor window contrast. The value ranges from 0
to 100. The default value is 50.
The larger the number, the higher the contrast is. You can use
this function when the whole video bright is OK but the contrast
is not proper. Please note the video may become hazy if the
value is too low. If this value is too high, the dark section may
lack brightness while the bright section may over exposure .The
recommended value ranges from 40 to 60.
Saturation
It is to adjust monitor window saturation. The value ranges from
0 to 100. The default value is 50.
The larger the number, the strong the color is. This value has
no effect on the general brightness of the whole video. The
video color may become too strong if the value is too high. For
the grey part of the video, the distortion may occur if the white
balance is not accurate. Please note the video may not be
attractive if the value is too low. The recommended value
ranges from 40 to 60.
Gain
The gain adjust is to set the gain value. The default value may
vary due to different device models. The smaller the value, the
low the noise. But the brightness is also too low in the dark
environments. It can enhance the video brightness if the value
is high. But the video noise may become too clear.
Color mode
It includes several modes such as standard, color, bright,
gentle. Select a color mode, the sharpness, brightness,
contrast and etc can automatically switch to corresponding
setup.

Dahua nvr4208-8p Specifications

General

Operating System	Embedded LINUX
IP Camera Input	8 channel
Two-way Talk	1 channel Input, 1 channel Output, RCA
Interface	1 HDMI, 1 VGA
OSD	Camera title, Time, Video loss, Camera lock, Motion detection, Recording
Record Interval	1 ~ 120 min (default: 60 min), Pre-record: 1 ~ 30 sec, Post-record: 10 ~ 300 sec
Ethernet	1 RJ-45 Port (10/100/1000Mbps)
Max. User Access	128 users
Smart Phone	iPhone, iPad, Android
HDD Bays	1
Operating Temperature	-10°C ~ +55°C (+14°F ~ +131°F)
Main Processor	Dual-core embedded processor
Multi-screen Display	1/4/9
Video Detection and Alarm	Motion Detection, MD Zones: 396 (22 x 18), Video Loss, Camera Blank
Alarm input	4
Relay Output	2
Compression	H.265, H.264
Recording Resolution	Up to 8MP
Record Mode	Manual, Schedule (Regular, Continuous), MD (Video detection: Motion Detection, Camera Blank, Video Loss)
PoE	8 ports (IEEE802.3af/at)
Protocols	HTTP, TCP/IP, IPv4/IPv6, UPnP, RTSP, UDP, SMTP, NTP, DHCP, DNS, IP Filter, PPPoE, DDNS, FTP, Alarm Server, IP Search (Support Dahua IP camera, DVR, NVS, etc.)
USB Interface	2 USB2.0
Power Supply	AC 100~240V, 50/60 Hz
Power Consumption	NVR: <10W (without HDD), PoE: Max 25.5W for single port, 130W total
Operating Humidity	10%~90% RH