Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
functionality is limited to turning on or off only. The SNS ENR data and temperature
cannot be queried, unless Noise Figure Mode is installed. The SNS ENR data is
issued in printed form when an SNS is purchased, or can be read using the
instrument’s Noise Figure Mode if installed, or other Keysight noise figure
instruments that support the SNS.
Only one SNS is supported at a time.To switch to a different SNS (a USB SNS or an
N4000 series SNS), disconnect the one that is no longer being used prior to
connecting a new one.
When you switch to the Swept SA measurement, the State is OFF and the 28v BNC
drive and SNS is turned off to ensure the two are in sync. When you exit the Swept
SA measurement, State is set to OFF, and the 28v BNC and SNS drive are turned off.
For making manual noise figure measurements, the following setup is
recommended:
–
Set Span to Zero
–
Set Attenuation to 0 dB
–
Set the PRE-AMP ON
–
Set Res BW to 4 MHz
–
Set Detector to AVERage
–
Set Sweep Time to 16 ms - sets the variance correctly for good results.
–
Set a Band/Interval Power Marker function, and set the interval over the full
width of trace; that is, Left = 0s and Right = 16 ms
SNS Attached (Remote Query Only)
If a Smart Noise Source (SNS) is present, returns 1, otherwise 0.
Remote
Command
:SOURce:NOISe:SNS:ATTached?
Example
:SOUR:NOIS:SNS:ATT?
Preset
OFF
State Saved No
Backwards
Compatibility
Notes
In previous Noise Figure analysis applications, this command could optionally be preceded with the
:SENSe keyword. The optional :SENSe keyword is no longer supported
450 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)