Agilent Technologies 11867A? Manuel de service télécharger pdf (Page 96)

98 Chapter 5

Spectrum Analyzer

Making Distortion Measurements

Spectrum Analyzer

Figure 5-21 RF Attenuation of 10 dB

Step 12. Press Peak Search, Marker, Delta

Change the attenuation to 15 dB by pressing AMPTD Y Scale, Elec Atten,

15,

dB.

If the ∆Mkr1 amplitude absolute value is approximately ≥1dB as seen

in Figure 5-22, then more input attenuation is required; some of the

measured distortion is internally generated. If there is no change in the

signal level, the distortion is not generated internally. For example, the

signal that is causing the distortion, in this case, shown in Figure 5-22,

is not high enough in amplitude to cause internal distortion in the

analyzer so any distortion that is displayed is present on the input

signal.

Figure 5-22 No Harmonic Distortion

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Agilent Technologies 11867A? Manuel de service Page 96