User's Manual

GVR3550/GVR3552 User Manual Page 123 of 125
Check the network connection with the remote camera.
19. Display screen is not complete
Check the resolution the LCD supports. If the GVR resolution is 1920*1080, the LCD
should support 1920*1080 resolution.
20. No LCD HDMI output
Check the HDMI cable and whether LCD works in HDMI mode.
21. Record lag on PC in multi-cameras mode
Please check the network bandwidth, 100 MB is recommended and pay attention to the
PC performance. E.g.,16 cameras requires Quad Core CPU, discrete graphics, 2G
memory and high, 256M video memory and higher.
RECORDING TIME CALCULATION
Please confirm the HDD has been installed when install GVR3550/GVR3552 the first time.
HDD Capacity formula is:
Total HDD Space (M) = the amount of cameras * required time (Hour) * the HDD space occupied per
hour（M/H）
From the formula above we could conclude the recording time formula:
Recording Time (hour ) = Total HDD Space (M)/the HDD space occupied per hour（M/H）*the amount
of cameras
GVR3550/GVR3552 is equipped with MPEG4/H.264 compression technique, its dynamic range is quite
large thus the HDD capacity calculation based on assessing the video file size each camera recorded per
hour.
e.g.:
The video one single camera records per hour takes up 200M/H in HDD, use GVR3550 to record
synchronously with 12 cameras.
Record Time (hour) = 2*4*1024*1024/200（M/H）*12=3495.25（Hour）»145.6（Day）
COMPATIBLE HDD
Manufacturer Model Capacity
Seagate ST3000VX000 3T
Seagate ST500DM002 500G
Seagate ST2000VX000 2T
Seagate ST1000VX000 1T
Western Digital WD40EZRX-00SPEB0 4T
Western Digital WD20EZRX 2T