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Frequently Asked Questions: FAQ about GPS

Topic

 6How to convert between dBW and dBm?

How to convert between dBW and dBm?


dBm (Decibel per Milliwatt.)

dB referenced to one milliwatt (the received GPS-signal on the earth-surface has a magnitude of about -133dBm).

dBW (Decibel per Watt)

dB referenced to one watt (the emitted power from a GPS-Satellite is +13,4dBW and the received GPS-signal on the earth-surface has a magnitude of about -163dBW).

How do convert dBm into dBW

0dBW = 30dBm
-163dBW = -133dBm

How do convert dBW into dBm

30dBm = 0dBW
-133dBm = -163dBW

 
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last modified: 06.10.2004

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