2
Table 1-1 Cables and maximum transmission distance (network)
Model
Maximum Transmission Distance (ft/m)
RG59/U
750 ft/229 m
RG6/U
1,000 ft/305 m
RG11/U
1,500 ft/457 m
Table 1-2 Cables and maximum transmission distance (HDCVI)
Model
Maximum Transmission Distance (ft/m)
SYV-75-3
720P (25 fps/30 fps): 1,640 ft/500 m
720P (50 fps/60 fps): 984 ft/300 m
1080P (25 fps/30 fps): 984 ft/300 m
1.3.2 RS-485 Cable Requirements
When using 0.56 mm (24AWG) twisted-pair line, depending on different baud rates, the theoretical
maximum transmission distance is different.
Table 1-3 Theoretical maximum transmission distance
Baud Rate
Maximum Transmission Distance
2400 bps
1800 m
4800 bps
1200 m
9600 bps
800 m
The maximum transmission distance will be reduced in the following conditions: When thinner
communication cables are used; the Device is used in places with intense electromagnetic
interference; too many devices are connected to the RS-485 cable. Otherwise, maximum
transmission distance will be increased.
1.3.3 Selecting Power Cable
1.3.3.1 Power Cable
Depending on the power cable specification, the same cable diameter corresponds to different
transmission distance.
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For 24 VAC power supply, see "5 Cable Diameter (24 VAC) and Transmission Distance".
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For 12 VDC power supply, see "6 Cable Diameter (12 VDC) and Transmission Distance".
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For 24 VDC power supply, see "7 Cable Diameter (24 VDC) and Transmission Distance".
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For 30 VDC power supply, see "8 Cable Diameter (30 VDC) and Transmission Distance".
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For 36 VDC power supply, see "9 Cable Diameter (36 VDC) and Transmission Distance".
