:SPRocess:FFEQualizer:TAPS

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

To Install FFE Operator

Use this command:

:FUNCtion:FOPerator FFEQualizer

If secondary to Reference Rx operator:

:FUNCtion:SOP3 FFEQualizer

Linear Equalizer Commands

Command Syntax

:SPRocessN:FFEQualizer:TAPS "tap_value, tap_value, …"

The command argument is a comma separated list of individual tap value (real numbers). This command supports the DEFault common child command.

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.

Query Syntax

:SPRocessN:FFEQualizer:TAPS?

Description

Enters a list of tap values for a Linear Equalizer operator (LFE). Increasing the number of taps in your model increases the fidelity of the filter's frequency response as compared to an ideal response. To use this command, automatic tap configuration must be turned off using the :SPRocess:FFEQualizer:TAPS:AUTo command.

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 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

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

Beginning with FlexDCA revision A.05.60, use of an *OPC? query to pause program execution while waiting for this command to execute.

Example Command Sequence

:FUNCtion2:FOPerator FFEQualizer
:SPRocess2:FFEQualizer:TAPS:AUTo OFF;*OPC?
:SPRocess3:FFEQualizer:TAPS "-4.0733E-2, 1.04365, 3.851E-3, -3.782E-3, -7.04E-4";*OPC?
:SPRocess3:FFEQualizer:TAPS:NORMalize;*OPC?
: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.

Example Command Sequence

:SPRocess3:FFEQualizer:TAPS:AUTo OFF;*OPC?
:SPRocess3:FFEQualizer:TAPS "-4.0733E-2, 1.04365, 3.851E-3, -3.782E-3, -7.04E-4";*OPC?
:SPRocess3:FFEQualizer:TAPS:NORMalize;*OPC?