Technical data

Chapter 16 425
Spectrum Analyzer
Using the Spectrum Analyzer
Spectrum Analyzer
To restart averaging:
Changing the Resolution Bandwidth
The default resolution bandwidth is 0.1% of the span in Auto mode. By selecting
Manual, you can define a narrower bandwidth and thereby see spurious signals that
you might miss in Auto mode. However, the measurement will be slower.
NOTE The auto mode is appropriate for most measurements. When you set the Res BW to
Manual, you must remember to change the Res BW whenever you change the span.
Otherwise, the measurement may take longer then expected or will not have the
expected accuracy and or resolution.
Furthermore, if you set the span greater than 1 MHz, the maximum resolution
bandwidth allowed is 1% of the span. For example, if you set the span to 20 MHz,
the maximum resolution bandwidth will be 200 kHz.
Step Notes
1 [Average/Sweep]
2 [Restart] This key is unavailable or has no effect when
Sweep is set to Single. To restart a Single
Sweep measurement, press [Single].
Step Notes
1 [Setup]
2 On [Res BW] select
Manual. Each time you press this softkey, the selected
option changes. In
Auto mode, the resolution
bandwidth is coupled to the span setting,
Manual mode decouples the resolution
bandwidth from the span.
3 Enter the bandwidth using the
numeric keypad.
4 [Hz] or [kHz]