function s=setsamplefastsub(spo,msec)

%
%     SOSI-M2 V1.0 MATLAB M-file
%
% Set fast sample rate
%
% Arguments: s=setsamplefast(port,msec)
%
% spo: opened serial port object
% msec: sample period milliseconds: 100/200/500/1000


if(msec==100)
    srate='#sesaf10';       % 100ms
elseif(msec==200)
    srate='#sesaf2';        % 200ms
elseif(msec==500)
    srate='#sesaf5';        % 500ms
elseif(msec==1000)
    srate='#sesaf1s';       % 1sec
else
    disp('Parameter msec = 100 / 200 / 500 / 1000');
    return;
end

% Set up sample rate
    s=cmd(spo,srate,1.5);
    if findstr(s,'set sample')==0
        disp('Cannot set sample rate');
        fclose(spo);
        return;
    end