function [SysTF] = setUnitSysTF(nch,freq);
%  sets up dummy (unit magnitude) system TF for frequency bands
%   given in freq.  Normally just give upper and lower limit
%   for which dummy system TF is needed.
nBands = length(freq);
TF = ones(nch,nBands);
SysTF = struct('TF',TF,'freq',freq,'PhysU',0);
