function freqhlp
% FREQHLP Help file for FREQGUI


% ADSP Toolbox: Version 2.0 
% For use with "Analog and Digital Signal Processing", 2nd Ed.
% Published by PWS Publishing Co.
%
% Ashok Ambardar, EE Dept. MTU, Houghton, MI 49931, USA
% http://www.ee.mtu/faculty/akambard.html
% e-mail: akambard@mtu.edu
% Copyright (c) 1998


%============================================================
    tit_str= 'CT FREQUENCY RESPONSE';
    page1= ...                                          
        ['                                                 '
         ' This GUI plots the frequency response of a      '  
         ' a CT signal or a CT transfer function.          '  
         '                                                 '  
         ' Enter the numerator and denominator of H(s)     '
         ' or H(f) or of the FT of a signal as arrays      '
         ' in the edit fields and press accept.            '
         '                                                 '
         ' Select the plot type for magnitude or phase.    '
         ' The phase can also be unwrapped.                '
         ' Select the frequency units (f or omega) and     '
         ' edit the frequency range.                       '  
         '                                                 ' 
         ' Press PLOT to display the  spectrum.            '
         ' If INSTA-PLOT is on, results are dynamically    '
         ' updated as edits are made.                      '];


    page2= ...                                          
        [' SPECIAL FEATURES                                ' 
         '                                                 '
         ' CURSOR: Turn it on and then move and click      '
         ' the mouse button inside a plot to activate.     '
         ' The co-ordinates of the mouse are displayed in  '
         ' the upper right corner as you move the mouse.   '
         '                                                 '
         ' You can enter workspace variables into the      '
         ' numerator and denominator fields if prefixed    '
         ' by W. For example, the variable name xyz        '
         ' must be entered as Wxyz                         '
         '                                                 '
         '                                                 '
         ' M-FILE NAME:  freqgui                           '];

    helpgui(tit_str,page1,page2);