&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
PULSE(4:4):


        Source filtering.</p>
      <p style="font-family: monospace;" class="MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
'L'
low&nbsp;


        cut filter</p>
      <p style="font-family: monospace;" class="MsoPlainText">&nbsp;
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'H'
        high cut filter</p>
      <p style="font-family: monospace;" class="MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;&n