NDS3208 8 in 1 MPEG-2
Encoder User’s Manual
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Item
Requirement
Machine Hall Space
When user installs machine frame array in one machine hall, the
distance between 2 rows of machine frames should be 1.2~1.5m
and the distance against wall should be no less than 0.8m.
Machine Hall Floor
Electric Isolation, Dust Free
Volume
resistivity
of
ground
anti-static
material:
1X10
7
~1X10
10
，
Grounding current limiting resistance: 1M
(Floor bearing should be greater than 450Kg/
㎡
)
Environment
Temperature
5~40
℃
(sustainable )
，
0~45
℃
(short time)
，
installing air-conditioning is recommended
Relative Temperature
20%~80% sustainable 10%~90% short time
Pressure
86~105KPa
Door & Window
Installing rubber strip for sealing door-gaps and dual level
glasses for window
Wall
It can be covered with wallpaper, or brightness less paint.
Fire Protection
Fire alarm system and extinguisher
Power
Requiring device power, air-conditioning power and lighting
power are independent to each other. Device power requires AC
power 220V 50Hz. Please carefully check before running.
2.2.3 Grounding Requirement
All function modules‟ good grounding designs are the basis of reliability and stability of
devices. Also, they are the most important guarantee of lightning arresting and interference
rejection. Therefore, the system must follow this rule.
Coaxial cable‟s outer conductor and isolation layer should keep proper electric conducting
with the metal housing of device.
Grounding conductor must adopt copper conductor in order to reduce high frequency
impedance, and the grounding wire must be as thick and short as possible.
Users should make sure the 2 ends of grounding wire well electric conducted and be
antirust.
It is prohibited to use any other device as part of grounding electric circuit
The area of the conduction between grounding wire and device‟s frame should be no less
than 25mm
2
.
