Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
Source Sweep Reverse
Lets you reverse the source sweep direction
Normally, the source will sweep from a lower frequency to a higher frequency.
However, there are test scenarios in which the source sweep needs to be “reversed”.
In this case, it sweeps from a higher frequency to a lower frequency. For example,
when the DUT is a frequency converter and a measurement of the Lower Side Band
characteristics is desired, a reverse sweep is employed. Reverse sweeps are
supported for such scenarios, but two cautions are in order:
1.
Reverse Sweep only reverses the direction of the source’s sweep, not the
instrument’s sweep. Unless you are actually using a device like a frequency
converter and looking at the lower sideband, thus effectively reversing the
direction of the source’s sweep, the source will be sweeping in the opposite
direction from the instrument, and it will not be possible track the desired device
output frequency
2.
Any time you are using a frequency converter, care must be taken in setting up
all of the sweep parameters, including instrument start/stop frequency and
source multiplier, to make sure that the instrument’s sweep tracks the output of
the converter device
Remote Command
:SOURce:FREQuency:SSReverse ON | OFF | 0 | 1
:SOURce:FREQuency:SSReverse?
Example
:SOUR:FREQ:SSR OFF
:SOUR:FREQ:SSR?
Notes You must be in Spectrum Analyzer Mode to use this command. Use :INSTrument:SELect to set
the Mode
Dependencies If the currently selected source does not support this capability (for example, an internal Tracking
Generator which must track the LO), this control is forced to its Preset value and grayed-out
Preset Unaffected by Mode Preset, but set to OFF by Source Preset or Restore Input/Output Defaults
State Saved Part of the Input/Output system, which means it is loaded and saved with state
Range
ON|OFF
Freq Offset
Offsets the source frequency from the instrument frequency. The source frequency
tracks the SA frequency according to the equations at the bottom of the Source
Setup Table.
Remote Command
:SOURce:FREQuency:OFFSet <freq>
:SOURce:FREQuency:OFFSet?
Spectrum Analyzer Mode User's &Programmer's Reference 471

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)