# SCPI Command Subsystem Comparison

Migration Guide

- Migration Guide
- SCPI Differences
- SCPI Similarities
- SCPI Command Subsystem Comparison
- SCPI Programming Tools
- Setting Up the Oscilloscope in SCPI Programs
- Synchronizing Analysis with Acquired Data in SCPI Programs
- Querying Measurement Results
- Querying Waveform Data
- Waveform Load/Save Format Support
- Debugging SCPI Programs
- Example Programs for Common Oscilloscope Tasks, Old vs. New

SCPI Command Subsystem Comparison
Earlier Infiniium | Infiniium 2026 | Notes
--- | --- | ---
* (Common) | * (Common) | Common commands are defined by the SCPI standard.
: (Root Level) |  | There are no commands at the root level in Infiniium 2026. Commands have been moved to the :ACQuire, :SYSTem, and :STATus subsystems.
:ACQuire | :ACQuire | Infiniium 2026 does not have peak detect, high resolution, or segmented memory acquisition modes.
:ANALyze |  | In Infiniium 2026, clock recovery commands are per signal, although you can specify global clock recovery with the :CRECovery subsystem. Eye contour commands appear in the :MEASure subsystem. Signal type command are also per signal.
| :ANNotations | Infiniium 2026 has annotations instead of bookmarks.
| :APPLication | Relates to Infiniium-on-Infiniium configuration.
:BUS |  | Infiniium 2026 has the :PROTocol subsystem for protocol (serial bus) decode.
:CALibrate | :CALibrate |
| :CGMemory | Like :WMEMory, but for real-time eye and color grade or gray scale persistence waveforms.
:CHANnel<N> | :CHANnel<N> |
| :CMODe | Common mode signals created by combining two oscilloscope channels.
| :CONNection | For connecting to multiple oscilloscopes or virtual instruments.
| :CRECovery | Global clock recovery commands.
| :DIFF | Differential signals created by combining two oscilloscope channels.
:DISK | :DISK |
:DISPlay | :DISPlay | Bookmarks have been replaced by annotations in Infiniium 2026. See the :ANNotations subsystem.
:FUNCtion<F> | :FUNCtion<F> | Contains embedding/deembedding and equalization functions as well as the typical math functions, filters, and transforms.
| :GRAPh | Scaling and position commands for frequency-domain and time-domain graphs.
:HARDcopy |  | Printing screen captures is handled outside the Infiniium 2026 software.
:HISTogram | :HISTogram | Infiniium 2026 has a separate :MHIStogram subsystem for measurement histograms.
:HOSTed |  | Connecting to multiple oscilloscopes (or virtual instruments) is done in the :CONNection subsystem.
| :INSTrument | For connecting to multiple oscilloscopes or virtual instruments.
:ISCan (InfiniiScan) |  | Similar features appear in Infiniium 2026 under :TRIGger:QUALify.
:LANE<N> (Equalization) |  | In Infiniium 2026, equalization is performed in the :FUNCtion<F> subsystem.
:LISTer |  | Infiniium 2026 has the :PROTocol subsystem for protocol (serial bus) decode and listings.
| :LLINe | Limit line testing.
:LTESt | :LTESt | Limit Test. In Infiniium 2026, limit tests can also be applied to acquisitions, limit lines, and mask tests.
:LXI |  | Not in Infiniium 2026.
:MARKer | :MARKer |
:MEASure | :MEASure | Phase noise analysis commands are in the :PNOise subsystem.
| :MHIStogram | Measurement histograms.
:MTESt | :MTESt | Mask Test.
| :NAVigation | For navigating mask test failures, protocol search results, and other item collections.
| :NETWorks | For displaying S-parameter file and transfer function files in the Viewer.
| :PNOise | Phase noise analysis.
| :PROTocol | Protocol decode and listings.
| :REGions | Regions to restrict the waveform data used for a measurement or gated function.
:REPository |  | Not in Infiniium 2026.
:SBUS<N> (Serial Bus) |  | Infiniium 2026 has the :PROTocol subsystem for protocol (serial bus) decode.
:SELFtest |  | Self-test commands appear in the :SYSTem subsystem in Infiniium 2026.
| :SNOise | Commands for oscilloscope noise calibrations.
| :SOURce | Commands for controlling arbitrary waveform generators and simulated data generation for virtual oscilloscopes.
| :STATus | Status register interaction.
:SYSTem | :SYSTem |
:TIMebase | :TIMebase |
:TRIGger | :TRIGger |
:WAVeform | :WAVeform |
:WMEMory | :WMEMory | Waveform memory.
:XTALk (Crosstalk Analysis) |  | Not in Infiniium 2026.