Keysight Technologies N5173B EXG - Page 156

156 Keysight CXG, EXG, and MXG X-Series Signal Generators Programming Guide
Programming Examples
LAN Programming Interface Examples
Example 1: Reading Out the Channel Response and Calculating
Corrections for an Equalization Filter Using Matlab
This example reads out the channel response from a PSA and calculates a
correction equalization filter that can be loaded into the EXG/MXG.
function [corrFilter] = loadPsaEqFilter(psaDev, destRate)
% [corrFilter] = loadPsaEqFilter(psaDev[, destRate])
% Reads out the current Equalization filter active on the PSA
specified.
% The communication is over TCP-IP (LAN).
% destRate is assumed to be 200e6 if missing
% Example: [corrFilter] = loadPsaEqFilter('psa4')
% output of corrFilter is in time domain.
% NOTE: The equalization filter feature in the PSA Digital
Modulation
% Modulation Analysis mode must be ON for this script to work.
% It can be set to EQ Hold ON.
%
% Typically followed with something like:
% writeMxgFir('a-n5182b-00211', 'EQ_1GHZ_62MHZ', corrFilter);
if (nargin<1 || nargin>2)
error('[corrFilter] = loadPsaEqFilter(psaDev[, destRate]) --
destRate is assumed to be 200e6 if missing');
end
if (nargin<2)
destRate=200e6;
end
% contact PSA using LAN
t=tcpip(psaDev, 5025);
t.OutputBufferSize=1*1024*1024;
t.InputBufferSize=1*1024*1024;
fopen(t);
fprintf(t, ':FETCh:EVM9?\n');
magDb = readArrayOfDoubles(t);
fprintf(t, ':FETCh:EVM10?\n');
phaseDeg = readArrayOfDoubles(t);