:MEASure:AMPLitude:ISIVsbit?

Meas. mode:
Jitter
Waveform type:
NRZ
PAM4
Waveform record:
MV

Deprecated command. For FlexDCA revision A.05.60 and above, use the :MEASure:AMPLitude:ISISymbol? query instead.

Query Syntax

:MEASure:AMPLitude:ISIVsbit?

Description

Returns the ISI values for each measured edge as definite-length block data. ISI values are returned for only the edge types (one, zero, both) as specified by the command :DISPlay:AMPLitude:LEVel. Use the :MEASure:AMPLitude:ISIVsbit:BITS? query to return a list of bits corresponding to the returned values. Each ISI value is 32-bit floating point (4 bytes) returned in LSB (Least Significant Byte) first format. The data block is followed by a linefeed terminator character (0A hex).

The ISI vs BIT graph does not need to be displayed before data can be returned from this query.

Amplitude analysis must be turned on before the first interference measurement can be made. Use the :MEASure:AMPLitude:DEFine:ANALysis command.

Requires option 200 (Enhanced Jitter Analysis) and option 300 (Advanced Amplitude Analysis/RIN/Q-Factor). For PAM4 signals requires additional option 9TP (PAM-N Analysis).

Endiannes of Returned Data

To specify the byte order (endiannes) of the binary data, use the :SYSTem:BORDer command. The factory preset setting is little-endian in which the LSB (Least Significant Byte) is sent first. Because an incorrect endianess setting can be frustrating to troubleshoot, if you share your 86100D with other people, it is a good idea to explicitly set the endianess before transferring binary data and to restore FlexDCA's endianess setting upon completion of of your program. Use the following sequence of commands:

endian_setting = :SYSTem:BORDer?
:SYSTem:BORDer BENDian
…
…
:WAVeform:XYFormat:FLOat:YDATa?
…
…
:SYSTem:BORDer endian_setting

Be aware that VXI plug-and-play drivers can change the endianess setting. As a result always explicitly set the endianess in your program before transferring any binary data.

Common Measurement Child Queries

Common measurement queries. :COUNt?, :LOCation?, :MAXimum?, :MINimum?, :MEAN?, and :SDEViation?.

Child Commands

  • :COUNt?, :LOCation?, :MAXimum?, :MINimum?, :MEAN?, and :SDEViation? common measurement queries.
  • :BITS? returns a list of bits for which :ISIVsbit? has returned values.
  • :HIGHest? returns the values of the highest measured one or zero in the ISI vs. bit graph.
  • :LOWest? returns the values of the lowest measured one or zero in the ISI vs. bit graph.