Making Basic Measurements

Demodulating AM Signals (Using the Analyzer As a Fixed Tuned Receiver)

6. Select zero span by either pressing SPAN, 0, Hz; or pressing SPAN,

Zero Span. See Figure 1-51.

7. Change the sweep time to 5 ms by pressing Sweep,

Sweep Time (Man), 5, ms.

8. Since the modulation is a steady tone, you can use video trigger to

 

trigger the analyzer sweep on the waveform and stabilize the trace,

 

much like an oscilloscope by pressing Trig, Video, and adjusting the

 

trigger level with the front-panel knob until the signal stabilizes. See

 

Figure 1-52.

 

If you are viewing an off-the-air signal you will not be able to

 

stabilize the waveform.

 

If the Trigger Level is set too high or too low when this trigger mode is

NOTE

 

activated, the sweep will stop. You will need to adjust the trigger level

 

up or down with the front-panel knob until the sweep begins again.

 

 

Figure 1-51 Measuring Modulation In Zero Span

Chapter 1

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Agilent Technologies E7402A, E7405A, E7404A, E7403A, E7401A manual Measuring Modulation In Zero Span

E7402A, E7405A, E7404A, E7401A, E7403A specifications

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