Agilent Technologies DisplayPort Manual do Utilizador descarregar pdf (Página 7)

October 29, 2012

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7

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Power Meter- measures dBm: dB relative to 1mW

Convert with relation:

0 dBm = 1 mW

= V

rms

2

/50

V

rms

= sqrt (50*.001)

=.224 V

V

p

=.31 V

Preparing for Test

Oscilloscope Level Accuracy

Signal Generator

Oscilloscope

Power Meter

Freq 1 GHz 2 GHz 4 GHz 6 GHz 8 GHz 10 GHz

mVrms 132.6 132.7 133.5 133.5 133.1 135.5

dBm -4.54 -4.53 -4.48 -4.48 -4.51 -4.35

'dB

-.04 -.03 +.02 +.02 -.01 +.15

I applied a constant -4.5 dBm (133mV

rms

)

1 2 3 4 5 6 7 8 9 10 11 12 ... 42 43

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