Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
Span depends on the currently selected input. For example, when using external
mixing, Full Span changes the frequency to the Preset frequency range specified for
the selected external mixing band.
Pressing this control while in Zero Span returns the instrument to Swept Span.
Remote
Command
[:SENSe]:FREQuency:SPAN:FULL
Example Set Span to full frequency range of the instrument:
:FREQ:SPAN:FULL
Couplings Turns off signal tracking (span zoom). Does not turn off markers, or the current active function
Start Freq
Sets the frequency at the left side of the graticule. While adjusting Start Freq, "Stop
Freq" on page 294 is held constant, which means that both "Center Frequency" on
page 281 and "Span" on page 287 will change.
Start Freq also sets the frequency entry mode to Start or Stop. In Start or Stop
mode, the start frequency and stop frequency values are displayed below the
graticule, and the default active function in the Frequency menu is Start Freq.
Remote Command
[:SENSe]:FREQuency:STARt <freq>
[:SENSe]:FREQuency:STARt?
Example
:FREQ:STAR 200 MHz
:FREQ:STAR?
Notes Max value depends on Hardware Options
Dependencies By direct entry:
–
You cannot set Start Freq > Stop Freq
–
You cannot set Start Freq = Stop Freq
–
You cannot select Zero Span by setting Start Freq = Stop Freq
–
You cannot set Start Freq to a value that would create a span of less than 10Hz
If you try to do any of the above, Stop Freq changes to maintain a minimum of 10Hz for the difference
between Start Freq and Stop Freq
With the knob or step keys:
–
You cannot increment Start Freq to a value greater than Stop Freq – 10Hz. If already in Zero
Span, you cannot increment at all, and the first decrement is forced to at least 10Hz
Start Freq can be limited by Span limits, if Stop Freq is below its preset value
If the electronic/soft attenuator is enabled, any attempt to set Start Freq such that Stop Freq would be
>3.6 GHz fails, and results in an advisory message. If the equivalent SCPI command is sent, this same
message is generated as part of a “-221, Settings conflict” warning
292 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)