Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
parameters
While in External Mixing, the maximum Start Freq you can set is determined by the external mixing
parameters. It will be close to the maximum LO frequency (7 GHz if undoubled, 14 GHz if doubled)
times the harmonic number, for the highest harmonic range in the Harmonic Table for the current
mixer setup. It can be queried with :FREQ:STARt? MAX
Annotation Start <value> appears in the lower left corner of the display. This replaces Center <value>
Status Bits/OPC
dependencies
Non-overlapped
Stop Freq
Sets the frequency at the right side of the graticule. While adjusting Stop Freq,
"Start Freq" on page 292 is held constant, which means that both "Center
Frequency" on page 281 and "Span" on page 287 will change.
Stop 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:STOP <freq>
[:SENSe]:FREQuency:STOP?
Example
:FREQ:STOP 220 MHz
:FREQ:STOP?
Notes Preset and Max values depend 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
Stop Freq can be limited by Span limits, if Start Freq is above its preset value
If the electronic/soft attenuator is enabled, any attempt to set Stop Freq >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
If "Source Mode" on page 457 is set to Tracking, and the Max or Min Start Freq is therefore limited by
the limits of the source, a warning message is generated, “Data out of range; clipped to source
294 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)