hat
Anjeneral pale, nan jeni, dB ak dB se sèlman ant adisyon ak soustraksyon, miltiplikasyon ak divizyon pa fè sa. pi itilize se nan soustraksyon a: rediksyon dbm se aktyèlman de pouvwa divize dbm, siyal pouvwa ak pouvwa bri divize se siyal nan rapò bri (Snr). dbm plis dbm se aktyèlman de pouvwa miltipliye, li te gen ra (Mwen konnen sèlman pouvwa spectre konvolusyon kalkil la nan aplikasyon sa). dbm pa dbm sa, 1mW nan 1mW VRÈ? Anplis de sa nan kamarad klas yo fin vye granmoun te ekri m 'fason sa a ka diman kenbe vitès ak ekspresyon Goldbach konjekti a, Mwen te viv anpil ane epi yo pa te wè sa ki ap travay nan sa jaden nan jwe.
eng
Generally speaking, in engineering, dB and dB is only between the addition and subtraction, multiplication and division do not. The most used is the subtraction: dBm reduction is actually two power divided dBm, signal power and noise power divided is the signal to noise ratio (SNR). dBm plus dBm is actually two power multiplied, it has been rare (I only know the power spectrum convolution calculation of such applications). dBm by dBm what, 1mW of 1mW TRUE? In addition to the old classmates wrote me this way can hardly keep pace with the expression Goldbach conjecture, I have lived so many years and have not seen what works in this field of play.