:MEASure:SNDRatio:LMEans
Command Syntax
:MEASure:SNDRatio:LMEans
Query Syntax
:MEASure:SNDRatio:LMEans?
Description
For each level, this measurement returns the mean level of long-run-lengths within the pattern. These are the same long-run-lengths used in the Sigma-n measurement.
When adding this measurement, the measurement name(s) depend on the selected SNDR Standard (see :<source>:SNDRatio:STANdard):
| Signal Type | Standard | Standard Name | Measurement Names | Waveform on which measurements are made |
|---|---|---|---|---|
| NRZ | ASA13 | ASA SG1-3 | SNDR Level 0-1 | The SNDR Input waveform |
| PAM4 | PCIe | PCIe | Sigma-n Level 0-3 | The selected Source input channel |
| PAM4 | IEEe | IEEE (PRBS13Q) | SNDR Level 0-3 | The SNDR Input waveform |
| PAM4 | IDJ | IEEE 802.3 dj | SNDR Level 0-3 | The SNDR Input waveform |
| PAM4 | ASA45 | ASA SG4, 5 | SNDR Level 0-3 | The SNDR Input waveform |
| PAM3 | USB4 | USB4 Gen 4 | SNDR Level 0-2 | The SNDR Input waveform |
SNDR measurement parameters are defined for the waveform source selected by :MEASure:SNDRatio:LMEans:SOURce.
Example Command Sequence
:MEASure:SNDRatio:LMEans:SOURce CHANnel1 :CHANnel1:SNDRatio:STANdard PCIe :CHANnel1:SNDRatio:PUINterval 32 :CHANnel1:SNDRatio:NAVerages 8 :CHANnel1:SNDRatio:LFPLength 600 :CHANnel1:SNDRatio:LFPDelay 8 :MEASure:SNDRatio:LMEans :MEASure:SNDRatio:LMEans?