="c">!                               DEMODULATION FREQUENCY.</span>
<span class="c">!                               F IS IN UNITS OF CYCLES PER DATA POINT.</span>
<span class="c">!                               F IS BETWEEN 0.0 AND 0.5 (EXCLUSIVELY).</span>
<span class="c">!     OUTPUT--2 pages OF AUTOMATIC PRINTOUT--</span>
<span class="c">!             1) AN AMPLITUDE PLOT;</span>
<span class="c">!             2) A PHASE PLOT; AND</span>
<span class="c">!             3) AN UPDATED DEMODULATION FREQUENCY E