# :MEASure:SNDRatio:PMAX

SNDR P-max Commands

- :MEASure:SNDRatio:PMAX
- :MEASure:SNDRatio:PMAX:FAVorite
- :MEASure:SNDRatio:PMAX:LOCation?
- :MEASure:SNDRatio:PMAX:SOURce
- :MEASure:SNDRatio:PMAX:STATus?
- :MEASure:SNDRatio:PMAX:STATus:DETails?
- :MEASure:SNDRatio:PMAX:STATus:REASon?
- :MEASure:SNDRatio:PMAX:UREFerence:STATe
- :MEASure:SNDRatio:PMAX:UREFerence:VALue

## Command Syntax

    :MEASure:SNDRatio:PMAX

## Query Syntax

    :MEASure:SNDRatio:PMAX?

## Description

On NRZ waveforms, P-max is a V Max measurement on the linear fit pulse response p(k) waveform.

On PAM waveforms, the P-max measurement algorithm depends on the selected SNDR Standard:

SNDR Standard | P-max measurement algorithm
--- | ---
PCIe (PCIe 6.0), IEEE (802.3dj), ASA SG4, 5, USB4 Gen 4 | Effective Pmax is measured using a square root of the sum of squares of dual pulse fit vectors approach (one pulse fit on even UIs and one on odd UIs). In these cases, Effective P-max is measured on the Source waveform.
IEEE (PRBS13Q), Automatic, File | Pmax is a V Max measurement on the linear fit pulse response p(k) waveform. In these cases, P-max is measured on the Linear Fit Pulse Response waveform.

SNDR measurement parameters are defined for the waveform source selected by `:MEASure:SNDRatio:PMAX:SOURce`. The SNDR standard is selected by the `:<source>:SNDRatio:STANdard` command.

## Example Command Sequence

    :MEASure:SNDRatio:PMAX:SOURce CHANnel1
    :CHANnel1:SNDRatio:STANdard PCIe
    :CHANnel1:SNDRatio:PUINterval 32
    :CHANnel1:SNDRatio:NAVerages 8
    :CHANnel1:SNDRatio:LFPLength 600
    :CHANnel1:SNDRatio:LFPDelay 8
    :MEASure:SNDRatio:PMAX
    :MEASure:SNDRatio:PMAX?