Agilent Technologies 54503A Podręcznik Użytkownika Pobierz pdf (Strona 137)

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Chapter 2 137

Making Measurements

Example 11: Time-Gated Measurement

Using this measurement setup will allow you to view all signal spectra

on the spectrum analyzer and all timing signals on the oscilloscope. The

setup will prove to be very helpful when you perform gated

measurements on unknown signals.

Figure 2-68 Connection Diagram for Time-Gated Spectrum Measurements

Stepping through the Measurement of a Single

RF-Pulse Train

This measurement example will give you a closer look at time-gating

and will show even more clearly the advantages of this measurement

capability. Because the example uses a simple pulsed-RF signal with

speciﬁc parameters and shows speciﬁc control settings, you can

duplicate the measurement using your own equipment.

The objective of this measurement is to eliminate the pulse spectrum

and then view the spectrum of the carrier as if it were continually on,

rather than pulsed. This will reveal low-level modulation components

that were hidden by the pulse spectrum.

Figure 2-69 Connection Diagram for Example

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