Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.5 ACP Measurement
thermal noise. This can be a useful behavior because thermal noise often interferes
with what you want to measure, instead of being part of what you want to measure.
Note that NFE is not adequately accurate to always be able to read below kTB.
Recalibration of Noise Floor
In instruments with the NF2 license installed, the calibrated noise floor used by
Noise Floor Extension should be refreshed periodically. Keysight recommends that
the Characterize Noise Floor operation be performed after the first 500hours of
operation, and once every calendar year. To do this, use "Characterize Noise Floor"
on page 2149, under System, Alignments, Advanced. If you have not done this
yourself at the recommended interval, then when you turn on Noise Floor Extension,
the instrument will prompt you to do so with a dialog stating:
This action will take several minutes to perform. Please disconnect all cables from
the RF input and press Enter to proceed. Press ESC to cancel, or Postpone to
postpone for a week
If you cancel, you will be prompted again the next time you turn NFE on. If you
postpone, you will be prompted again after a week passes and you then turn NFE
on.
Fast Power RBW Mode
Specifies RBW behavior of Fast Power under Meas Method.
Option SCPI Description
Best Speed
SPEed
The acquisition RBW is set to be configured for best speed. The
RBW is automatically calculated, and is not configurable
Explicit
EXPLicit
You can configure RBW manually
Remote Command
[:SENSe]:ACPower:BANDwidth[:RESolution]:FPOWer:MODE SPEed | EXPLicit
[:SENSe]:ACPower:BANDwidth[:RESolution]:FPOWer:MODE?
Example
:ACP:BAND:FPOW:MODE EXPL
:ACP:BAND:FPOW:MODE?
Dependencies Grayed-out when "Meas Method" on page 970 is not Fast Power
Not available in VXT models M9410A/11A/15A
Couplings If EXPLicit is selected, "Res BW" on page 936 is configurable. If not, Res BW is grayed-out
Preset
SPEed
State Saved Saved in instrument state
Fast Power IF Gain Offset
Lets you optimize for dynamic range versus input signal level.
1090 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)