:MEASure:PJITter:MODE
Command Syntax
:MEASure:PJITterN:MODE {P13Q | P9Q | PJNU | PDDirac | FILE}
Where N identifies one of four possible PAM jitter analyses {1:4}. For example, PJITter4.
Query Syntax
:MEASure:PJITterN:MODE?
Description
This command selects the pattern present in the input signal:
- P13Q
- PRBS13Q — A repeating 8191-symbol sequence formed by Gray coding pairs of bits from two repetitions of the PRBS13 pattern into PAM-4 symbols.
- P9Q
- PRBS9Q — A repeating 511-symbol sequence formed by Gray coding pairs of bits from two repetitions of the PRBS9 pattern into PAM-4 symbols.
- PJNU
- PCIe6 JnU — A 52-symbol pattern for making edge jitter measurements on PCIe Gen6 signals.
- PDDirac
- PCIe6 Dual-Dirac — On a specified 52-UI jitter pattern where each of the 12 edges in PAM-4 are repeated four times, jitter is measured on each of the 48 edges individually and then averaged.
- Random Jitter RMS (TTX-RJ) is measured, and the dual-Dirac model is used to return Uncorrelated Total Jitter peak-peak (TTX-UTJ) and Uncorrelated Deterministic Jitter Delta-Delta (TTX-UDJDD) extrapolated to a BER of 1E-6. These measured values appear in the Results pane.
- Note that when this option is selected, the Include 1/2 Level Edges In Composite controls (see
:MEASure:PJITter:COMPosite:INC1leveland:MEASure:PJITter:COMPosite:INC2level) are not used because all edges are used in the 48-edge jitter measurements. - FILE
- Lets you specify the edges for data pattern by loading its definition from a file.
- The format of this file is proprietary. For help developing custom files, contact Keysight Technical Support and ask for an Application Engineer.