Agilent Technologies E7405A, E7402A, E7404A, E7403A Comparing Signals, Signal Comparison Example

Making Basic Measurements

Comparing Signals

Comparing Signals

Using the analyzer, you can easily compare frequency and amplitude differences between signals, such as radio or television signal spectra. The analyzer delta marker function lets you compare two signals when both appear on the screen at one time or when only one appears on the screen.

Signal Comparison Example 1:

Measure the differences between two signals on the same display screen.

1.Perform a factory preset by pressing Preset, Factory Preset (if present).

2.Connect the 10 MHz REF OUT from the rear panel to the front-panel INPUT.

3.Set the center frequency to 30 MHz by pressing FREQUENCY,

Center Freq, 30, MHz.

4.Set the span to 50 MHz by pressing SPAN, Span, 50, MHz.

5.Set the resolution bandwidth to spectrum analyzer coupling by pressing BW/Avg, Res BW (SA).

6.Set the Y-Axis Units to dBm by pressing AMPLITUDE, More, Y-Axis Units, dBm.

7.Set the reference level to 10 dBm by pressing AMPLITUDE, Ref Level, 10, dBm.

The 10 MHz reference signal appears on the display.

8.Press Peak Search to place a marker at the highest peak on the display. (The Next Pk Right and Next Pk Left softkeys are available to move the marker from peak to peak.) The marker should be on the 10 MHz reference signal. See Figure 1-1.

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