---
html_class: wide-page
---

# RWR Simulator

You are running the test station for a RADAR warning receiver. Command a threat RADAR to a known angle, then compare the bearing the receiver measures with the true one. The scope on the left shows the measured bearing in red and the true angle as a muted reference marker.

<div class="demo-frame">
  <div class="demo-frame__bar">
    <span>Interactive demo · RWR Simulator · Lesson 36</span>
    <a href="https://usafa-ece.org/apps/rwr-simulator/" target="_blank" rel="noopener">Open full-screen ↗</a>
  </div>
  <iframe
    src="https://usafa-ece.org/apps/rwr-simulator/"
    height="900"
    loading="lazy"
    title="RWR Simulator"></iframe>
</div>

## Things to Try

- **Weaken the signal.** Step the signal strength from 0 dB down to −40 dB and watch the bearing history. How far does the measured bearing wander from the true angle?
- **Change the threat frequency.** Step from VHF up to X band. The $d/\lambda$ readout changes because the antenna spacing $d$ is fixed while the wavelength $\lambda$ shrinks. Does the bearing stay accurate at every frequency?
- **Move off boresight.** Command angles out toward ±60° and compare the error with what you saw at 0°.
- **Collect data.** Press **Record Test Point** (or the space bar) at each setting, then use **Export CSV** to save your measurements.