:COMPliance Commands 11
Keysight InfiniiVision 4000 X-Series Oscilloscopes Programmer's Guide 333
:COMPliance:USB:TEST
(see page 1428)
Command Syntax
:COMPliance:USB:TEST <test>
<test> ::= {DHSS | HHSS | DLSS | HLSS | DFSS | HFSS}
The :COMPliance:USB:TEST command selects the type of signal quality test to
perform:
• DHSS — Device Hi-Speed Signal Quality.
• HHSS — Host Hi-Speed Signal Quality.
• DLSS — Device Low Speed Signal Quality.
• HLSS — Host Low Speed Signal Quality.
• DFSS — Device Full Speed Signal Quality.
• HFSS — Host Full Speed Signal Quality.
For Hub upstream testing, select the Device tests.
For Hub downstream testing, select the Host tests.
Low and Full Speed tests require two or three single-ended probes.
Hi-Speed tests are available only on 1.5 GHz bandwidth oscilloscopes, and a
differential probe or SMA cable connections are required.
Note that the N2750A Series InfiniiMode differential probes cannot be used with
the Hi-Speed Signal Quality test fixtures because they have damping resistors and
the USB test fixture also has damping resistors specifically designed for the
E2678A socketed probe heads.
Query Syntax
:COMPliance:USB:TEST?
The :COMPliance:USB:TEST? query returns the selected signal quality test type.
Return Format
<test><NL>
<test> ::= {DHSS | HHSS | DLSS | HLSS | DFSS | HFSS}
See Also • ":COMPliance:USB:TEST:TYPE" on page 335
• ":COMPliance:USB:SOURce:DPLus" on page 332
• ":COMPliance:USB:SOURce:DMINus" on page 331
• ":COMPliance:USB:SOURce:ADJacent" on page 329
• ":COMPliance:USB:SOURce:DIFFerential" on page 330
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