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You can refer to the following sheet for the file size in one hour per channel. (All the data listed below are
for reference only.)
Bit stream size (max)
96K
160K
224K
320K
448K
640K
896K
1280K
1792K
Appendix B
1. What is the surge?
Surge is a short current or voltage change during a very short time. In the circuit, it lasts for microsecond.
In a 220V circuit, the 5KV or 10KV voltage change during a very short time (about microseconds) can be
called a surge. The surge comes from two ways: external surge and internal surge.
⚫
The external surge: The external surge mainly comes from the thunder lightning. Or it comes from the
voltage change during the on/off operation in the electric power cable.
⚫
The internal surge: The research finds 88% of the surge from the low voltage comes from the internal
of the building such as the air conditioning, elevator, electric welding, air compressor, water pump,
power button, duplicating machine and other device of inductive load.
The lightning surge is far above the load level the PC or the micro devices can support. In most cases, the
surge can result in electric device chip damage, PC error code, accelerating the part aging, data loss and
etc. Even when a small 20 horsepower inductive engine boots up or stops, the surge can reach 3000V to
50000V, which can adversely affect the electronic devices that use the same distribution box.
File size
42M
70M
98M
140M
196M
281M
393M
562M
787M
Earthing
Bit stream size (max)
128K
192K
256K
384K
512K
768K
1024K
1536K
2048K
File size
56M
84M
112M
168M
225M
337M
450M
675M
900M
127
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