Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
bandwidth is 1.0kHz is the same as the filter whose –6dB bandwidth is 1.41kHz,
whose Noise bandwidth is 1.06kHz, and whose Impulse bandwidth is 1.48kHz. As
you cycle through these various filter bandwidths the filter does not change, but the
way the filter is annotated and the value which appears in the active function area
and on the control does.
Wide Bandwidths
Lets you access a set of Resolution Bandwidths that are wider than the standard Res
BWs. These wide bandwidths only appear in the Swept SA measurement. The Wide
Bandwidths option can only be used when Span is set to Zero Span
If these conditions are not met, this option is not available.
When Wide Bandwidths are ON:
–
The minimum Res BW is 10MHz. To select Res BWs 8MHz or narrower, Wide
Bandwidths must be OFF
–
In Zero Span, a channel filter shape is used that is nearly square (shape factor
1.2:1), rather than Gaussian or Flattop, "RBW Filter Type" on page 254 is grayed-
out and displays Channel. When Sweep Type is FFT, Gaussian and Flattop are
still available
–
In Zero Span, "RBW Filter BW" on page 255 is grayed-out, and shows −3dB
–
In Zero Span, no VBW filter is used, so VBW averaging is not available. Since
VBW averaging is not available, the VBW annotation has the * symbol added
(meaning no video averaging). When no VBW averaging is available, this is
equivalent to having a VBW setting that is greater than Res BW
–
The available "Detector" on page 521 types are Peak or Average. Only one
detector can be used at a time
–
In Zero Span, Gate is not available
–
TV Trigger is not available
–
In Zero Span, the minimum (fastest) sweep time is limited to a value that is
typically between 200-400µs, depending on the bandwidth and number of
points you have set. This means you will not be able to set sweep times shorter
than this value while Wide Bandwidths is ON
The instrument independently remembers the Res BW settings for when Wide
Bandwidths is OFF and when Wide Bandwidths is ON. For example, if a Res BW of
300kHz was set before Wide Bandwidths was turned ON, then the instrument will
return to a Res BW of 300kHz when Wide Bandwidths is turned OFF.
258 Spectrum Analyzer Mode User's &Programmer's Reference

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)