# Lesson 18 — Active Deception

<p class="block-synopsis">Trade shouting for lying. Instead of burying the real return in noise, deception hands the radar a convincing false one and lets it track that — built on DRFM, walked off the target with range-gate pull-off, and fought back by leading-edge tracking.</p>

<div class="block-toc">
  <a class="bt-card bt-reading" href="L18_ActiveDeception_Reading.html">
    <span class="bt-kind">Reading</span>
    <h4>Active Deception</h4>
    <p>Deception vs noise, the DRFM repeater, range- and velocity-gate pull-off, false targets and decoys, and the radar counters.</p>
  </a>
  <a class="bt-card bt-flashcards" href="L18_Flashcards.html">
    <span class="bt-kind">Flashcards</span>
    <h4>Review deck</h4>
    <p>Key terms and relations from the lesson, in a self-test deck.</p>
  </a>
  <a class="bt-card bt-demo" href="L18_DRFMDeception_Demo.html">
    <span class="bt-kind">Demo</span>
    <h4>DRFM Deception</h4>
    <p>Capture a pulse, plant a cover pulse, then ramp the delay to walk the range gate off the target and blink off.</p>
  </a>
  <a class="bt-card" href="L18_Preflight.html">
    <span class="bt-kind">Pre-flight</span>
    <h4>Pre-flight quiz</h4>
    <p>Pre-class check, due before the lesson. Counts toward your IP grade.</p>
  </a>
</div>
