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Senior Member
Reputation: 491
- dBm
Guys, why signal strength is represented by negative powers? like: -77 dBm
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2009-03-08 11:58 PM
# ADS
Circuit advertisement
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Senior Member
Reputation: 446
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Usually engineers are more interested to know how much is a magnitude more greater than other and become the dB who compares a magnitude respect the other one. If the magnitude measured is lower than the reference used the result is negative. I.e. if you compare 1uW vs. 1 mW result is -30 dB, and 30 dBmW are 1 dBW
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VIP Member
Reputation: 1401
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