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4. Operating Instruction
4.2 Advanced operation guide
141
Fig. 4.59 Observed FM signal spectrum with the Gate
Step 5. Close the Gate Preview and open the Time Gate to observe the FM signal spectrum
It is obvious that the spectrum observed with the Time Gate is clearer than that without the Time Gate (see Fig.
4.59).
Select the Pulse Modulation Off on the signal generator and stop the pulse modulation. Press
【
Sweep
】
,
[Gate] and [Gate On Off] on the Series Signal Analyzer to close the time gate. In such case, the spectrum is
shown in Fig. 4.60, indicating the spectrum with time gate is consistent with that of FM signal without pulse
modulation. There is no change of spectra under two cases.
Summary of Contents for 4051 Series
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