User's Manual

Making Basic Measurements Using Spectrum Analyzer Mode

Using the Analyzer As a Receiver in Zero Frequency Span

Example: View the modulation waveform of an AM signal in the time

domain.

1. To obtain an AM signal, you can either connect an antenna to the

spectrum analyzer input and tune to a commercial AM broadcast station

or you can connect a source to the spectrum analyzer input and set the

percent modulation of the source. (If a headset is used with the VIDEO

OUT connector, the spectrum analyzer will operate as a radio.)

2. First, center and zoom in on the signal in the frequency domain. (See

“Decreasing the Frequency Span Using the Marker Track Function.

“)

sure to turn off the marker track function, since the marker track function

must be off for zero span. See Figure 4-25.

PEAK

SPAN

200.0

kHZ

“BW

30 bHL

XSWP

Figure 4-25. Viewing an AM Signal

4-38

I-