看过我发的 “Anritsu 公司的射频不同单位常用值查询表...

Anritsu_RF_uW_Poster_No2RF Poster 2

11/04/05

7:50 PM

Page 1

discover... Reference Charts for RF & Wave Communications
Spectrum Analyser Conversion Factors
50 Ohms TO FROM
Input Impedance Power Ratio dBm mW w.

Power Measurement

Frequency Modulation

dBm 0 +13 -47 -107

dBV -13 0 -60 -120

dBmV +47 +60 0 -60

dB V +107 +120 +60 0
-10

1.0 Carrier & Sideband Amplitude 0.8 0.6 0.4 0.2 0 0.2 0.4 1 2 3 4 5 6 Deviation Ratio 7 8 9 Carrier 1st Sideband 2nd 3rd

dBm +40 +30

(watts vs. dBm)

dBm dBV dBmV dB V
75 Ohms TO FROM

4th

-20 -30 -40

+20

5th 6th

7th

+10 0 1 mW 100nW

Input Impedance

10 mW 1uW

100 mW 10uW

1W 100u W

10 W 1mW

dBm 0 +11.25 -48.75 -108.75

dBV -11.25 0 -60 -120

dBmV +48.7 +60 0 -60

dB V +108.7 +120 +60 0

dBm dBV dBmV dB V

Amplitude Modulation

EC
% modulation 1
Sideband level belo