Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
The on/off switch turns this function on and off. Setting a value for Reference Level
Offset turns the function ON.
See "More Information" on page 211
Remote
Command
:DISPlay:WINDow[1]:TRACe:Y[:SCALe]:RLEVel:OFFSet <rel_ampl>
:DISPlay:WINDow[1]:TRACe:Y[:SCALe]:RLEVel:OFFSet?
Example Set Reference Level Offset to 12.7dB. The only valid suffix is dB. If no suffix is sent, dB is assumed:
:DISP:WIND:TRAC:Y:RLEV:OFFS 12.7
Preset 0 dBm
State Saved Saved in instrument state
Min Variable
Limited to values that keep the reference level within the range of -327.6dB to 327.6dB
Max 327.6 dB
Annotation The offset is displayed as “Ref Offset <value>” to the right of the reference level annotation if nonzero.
When the offset is zero, no annotation is shown
Auto Function
Remote
Command
:DISPlay:WINDow[1]:TRACe:Y[:SCALe]:RLEVel:OFFSet:STATe OFF | ON | 0 | 1
:DISPlay:WINDow[1]:TRACe:Y[:SCALe]:RLEVel:OFFSet:STATe?
Example Turn Reference Level Offset On:
:DISP:WIND:TRAC:Y:RLEV:OFFS:STAT ON
Preset
OFF
More Information
Offsets are used when gain or loss occurs between a device under test and the
instrument input. Thus, the signal level measured by the instrument may be thought
of as the level at the input of an external amplitude conversion device. Entering an
offset does not affect the trace position or attenuation value, just the value of the
top line of the display and the values represented by the trace data. Thus, the values
of exported trace data, queried trace data, marker amplitudes, trace data used in
calculations such as N dB points, trace math, peak threshold, and so forth, are all
affected by Ref Level Offset.
NOTE
Changing the offset causes the instrument to immediately stop the current
sweep and prepare to begin a new sweep, but the data will not change until the
trace data updates, because the offset is applied to the data as it is taken. If a
trace is exported with a nonzero Ref Level Offset, the exported data will contain
the trace data with the offset applied.
The maximum reference level available is dependent on the reference level offset.
That is, Reference Level – Reference Level Offset must be in the range –170 to
Spectrum Analyzer Mode User's &Programmer's Reference 211

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)