Datasat DN200, Инструкция по установке и эксплуатации

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DN200 User Manual Rel 1.0
e.g. dBm in the case of milliwatts 20 dBm means 100:1 over 1 milliwatt or 100mW
e.g. converting 4W into dBm 10log10 4000mW / 1mW = 36 dBm
Later, we will see that if an antenna has twice the power gain of a half wave dipole (an antenna used as a
standard reference), that is a power ratio of 2 over the 1/2 wave dipole, then the antenna is said to have a
gain of 3dBd. (3db over the1/2 wave dipole)
10log2=3
A +3dB gain represents a doubling of power while a -3dB loss represents 1/2 of the power
1.15 Connect a Grounding Wire to the DN200
Provide Earth ground to the DN200 wing nut/stud. Use a wire gauge and color that complies with local
electrical codes. It is recommended that the wire be securely fastened to a weather resistant ring terminal
before attaching it to the DN200.
CAUTION: Be sure that grounding is available and that it meets local and national electrical codes.
For additional lightning protection, use lightning rods, lightning arrestors, or surge suppressors.
1.16 Connect Ethernet Cable to the DN200
1.
Attach the Ethernet cable to the Ethernet port on the DN200. (See Figure 4 below.)