:SPRocess:FFEQualizer:TSPacing:TIMe

Instrument:
N1000A
N109x
Flex Apps:
FlexDCA
FlexRT
Meas. mode:
Scope
Eye
Jitter
TDR
Package License:
L-RND

Command Syntax

:SPRocessN:FFEQualizer:TSPacing:TIMe <seconds>

<seconds> is a double.

Where N identifies one of up to 64 possible operators {1:64} that can be defined as part of a math function. The operators are numbered in the order that they were originally added to the function.

Description

Specifies tap spacing in seconds for a Linear Equalizer operator (LFE). To select tap spacing in seconds or taps-per-bit, use the :SPRocess:FFEQualizer:TSPacing command. This command is not valid in automatic tap configuration mode (:SPRocess:FFEQualizer:TAPS:AUTo ON).

For Reference Rx operator, what function do I send this command to?

If the FFE (Linear Equalizer) equalizer is a secondary function to the Reference Rx operator, address the :SPRocess:FFEQualizer:TAPS:TSPacing:TIMe command to the Reference Rx function as identified in the following Reference Rx Setup dialog's operator diagram. In the following figure, this would be Function 2 and the command would be:

:SPRocess2:FFEQualizer:TAPS:TSPacing:TIMe

The Linear Feedforward Equalizer operator is provided with the N1010A-201 Advanced Waveform Analysis license.

Example Command Sequence

:FUNCtion2:FOPerator FFEQualizer
:SPRocess2:FFEQualizer:TAPS:AUTo OFF
:SPRocess3:FFEQualizer:TAPS "-4.0733E-2, 1.04365, 3.851E-3, -3.782E-3, -7.04E-4"
:SPRocess3:FFEQualizer:TAPS:NORMalize
:SPRocess2:FFEQualizer:TSPacing SEConds
:SPRocess2:FFEQualizer:TSPacing:TIMe 51.0E-12
:SPRocess2:FFEQualizer:BANDwidth:AUTo OFF
:SPRocess2:FFEQualizer:BANDwidth 8.0E9
:FUNCtion2:COLor TCOLor4
:FUNCtion2:DISPlay ON
*OPC?
  //  Your code to synchronize execution timing.