Keysight Technologies N5173B EXG - Page 161

Keysight CXG, EXG, and MXG X-Series Signal Generators Programming Guide 161
Programming Examples
LAN Programming Interface Examples
displayOversample = 100;
xcoordsOversample =
((1:(displayOversample*length(fcorr)))-(displayOversample*lengt
h(fcorr)+2)/2)/(length(fcorr))*destRate/displayOversample;
% plot amplitude correction
figure;plot(xcoordsOversample,
resample(20*log10(abs(fcorr)),displayOversample,1,100));
% plot phase correction
fcorrz = fftshift(fft(ifftshift(resampledTime)));
figure;plot(xcoordsOversample,
resample(unwrap(angle(fcorrz)),displayOversample,1,100)/pi*180);
end
% clip off the center 256 (if necessary)
if (length(resampledTime)>256)
[~, index] = max(abs(resampledTime));
center=index;
left = center-127;
right = left+255;
clippedTime=resampledTime((left):(right));
else
clippedTime = resampledTime;
end
corrFilter=clippedTime;
end
function array = readArrayOfDoubles(fid)
line = fgets(fid);
array = sscanf(line, '%g%*c');
end
Example 3: Reading a VSA Trace and Setting up the Equalization Filter
Using Matlab
This example reads a VSA trace of “Eq Ch Freq Resp” or “Eq Impls Resp” and
creates an equalization filter compatible with the MXG.
function [corrFilter] = loadVsaEqFilter(filename, destRate)
% [corrFilter] = loadVsaFilter(filename[, destRate])