Decreasing The Frequency Span Around The Signal - Keysight X Series Measurement Manual

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
1 Select the mode.
2 Preset the analyzer.
3 Enable the internal
50 MHz amplitude
reference signal.
4 Set the start and stop
frequencies.
5 Turn on the signal
tracking function.
Figure 2-12 Signal Tracking on Before Span Decrease
Action
• Press Mode, Spectrum Analyzer.
• Press Mode Preset.
• Press Input/Output, RF
Calibrator, 50 MHz.
a. Press FREQ Channel, Start Freq,
20, MHz.
b. Press FREQ Channel, Stop Freq,
1, GHz.
• Press Span X Scale, Signal Track
(Span Zoom) (On).
37
Measuring Multiple Signals
Decreasing the Frequency Span Around the Signal
Notes
This places a marker at the
peak,. moves the signal to the
center of the screen. and
initiates Signal Track.
See Figure 2-12.