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Measuring Multiple Signals

Decreasing the Frequency Span Around the Signal

Using the analyzer signal track function, you can quickly decrease the span while

keeping the signal at center frequency. This is a fast way to take a closer look at the

area around the signal to identify signals that would otherwise not be resolved.

This procedure uses signal tracking with span zoom to view the analyzer 50 MHz

reference signal in a 200 kHz span.

Step Action Notes

1 Select the mode. • Press Mode, Spectrum Analyzer.

2 Preset the analyzer. • Press Mode Preset.

3 Enable the internal

50 MHz amplitude

reference signal.

• Press Input/Output, RF

Calibrator, 50 MHz.

4 Set the start and stop

frequencies.

a. Press FREQ Channel, Start Freq,

20, MHz.

b. Press FREQ Channel, Stop Freq,

1, GHz.

5 Turn on the signal

tracking function.

• Press Span X Scale, Signal Track

(Span Zoom) (On).

This places a marker at the

peak,. moves the signal to the

center of the screen. and

initiates Signal Track.

See Figure 2-12.

Figure 2-12 Signal Tracking on Before Span Decrease

Keysight N9038A Measurement Guide

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