function [freq,sp] = import_1130data()
SR560 = 10;
Freq = containers.Map;
Abs = containers.Map;
Phase = containers.Map;
for ii = 1:3
    mnimportdata(['E1130_' num2str(ii) '.txt'],Freq,Abs,Phase...
        ,['ERR_IMC' num2str(ii)],'sp');
end
mncombine(Freq,Abs,'ERR_IMC',3);
freq = Freq('ERR_IMC');
% divide by the SR560 gain
sp = Abs('ERR_IMC')/SR560;
end