- Process file data for analysis-https://www.mathworks.com/help/releases/R2023a/rf/ug/process-file-data-for-analysis.html
- Rfdata.data-https://www.mathworks.com/help/releases/R2023a/rf/ref/rfckt.rfdata.data.html
How to build bigger S-parameter from smaller S-parameters
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I have cable S4P measurements for :
- Through channel (S4P file)
- few - NEXT channels of the through channel in section 1 (Near end cross talk) S4P files
- few FEXT channels if the same through channel in section 1 (FAR end cross talk) S4P files
I need from these to build S16P file, with all this data.
How can I perform this task (that seems to be just placing Matrix data in the correct bigger matrix)
Example of files to use are attached
Thanks,
Roee
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Answers (1)
Abhimenyu
on 26 Sep 2023
Hi Roee,
I understand that you want to build a S16P file from the provided S4P files. Using MATLAB, you can deconstruct a bigger S-parameter file into smaller ones, e.g., S4P to S2P, but vice versa can only be done by manual array concatenation. Here is the example code for the same:
% Load the S4P file for the through channel
through_channel_data = read(rfdata.data,'THRU_Molex_TP1-TP4_2mQSFP-DD_RowA_07-2019_P1Tx4-P2Rx4.s4p');
% Load the S4P files for the NEXT channels
next_channel1_data = read(rfdata.data,'NEXT_Molex_TP1-TP4_2mQSFP-DD_RowA_07-2019_P1Tx4-P1Rx8.s4p');
next_channel2_data = read(rfdata.data,'NEXT_Molex_TP1-TP4_2mQSFP-DD_RowA_07-2019_P1Tx4-P1Rx7.s4p');
% ... (load other NEXT channel data files as needed)
% Load the S4P files for the FEXT channels
fext_channel1_data = read(rfdata.data,'FEXT_Molex_TP1-TP4_2mQSFP-DD_RowA_07-2019_P1Tx4-P2Rx5.s4p');
fext_channel2_data = read(rfdata.data,'FEXT_Molex_TP1-TP4_2mQSFP-DD_RowA_07-2019_P1Tx4-P2Rx3.s4p');
% ... (load other FEXT channel data files as needed)
% Initialize an empty S16P matrix
s16p_matrix = zeros(4, 4, length(through_channel_data.Freq));
% Place the data from the through channel S4P file into the S16P matrix
s16p_matrix(1:4, 1:4, :, :) = through_channel_data.S_Parameters;
% Place the data from the NEXT channels S4P files into the S16P matrix
s16p_matrix(1:4, 2:5, :, :) = next_channel1_data.S_Parameters;
s16p_matrix(1:4, 3:6, :, :) = next_channel2_data.S_Parameters;
%s16p_matrix(1:4, 4:7, :, :) = next_channel3_data.S_Parameters;
% ... (place other NEXT channel data into the S16P matrix as needed)
% Place the data from the FEXT channels S4P files into the S16P matrix
s16p_matrix(1:4, 9:12, :, :) = fext_channel1_data.S_Parameters;
s16p_matrix(1:4, 10:13, :, :) = fext_channel2_data.S_Parameters;
%s16p_matrix(1:4, 11:14, :, :) = fext_channel3_data.S_Parameters;
%s16p_matrix(1:4, 12:15, :, :) = fext_channel4_data.S_Parameters;
% ... (place other FEXT channel data into the S16P matrix as needed)
% Save the S16P matrix as an S16P file
save('output.s16p', 's16p_matrix');
You can substitute rest of your files accordingly and construct the S16P file. For more information follow the below links:
Thank you,
Abhimenyu.
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