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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