# Introduction

It can be the <span data-highlighted="true" data-vc="highlighted-text"><span class="_kqswh2mm"><span class="_5pioz8co _189e1dm9 _1il9buyh _19lc184f _d0altlke" data-testid="definition-highlighter">VLR</span></span></span> or the <span data-highlighted="true" data-vc="highlighted-text"><span class="_kqswh2mm"><span class="_5pioz8co _189e1dm9 _1il9buyh _19lc184f _d0altlke" data-testid="definition-highlighter">ILR</span></span></span> as illustrated in Figure 143.

[![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/VQLug1IfZgHgmdjv-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/VQLug1IfZgHgmdjv-image.png)

<div class="rich-media-item mediaSingleView-content-wrap image-align-start css-15apkp5" data-layout="align-start" data-media-vc-wrapper="true" data-node-type="mediaSingle" data-renderer-start-pos="62" data-vc="media-single" data-width="407" data-width-type="pixel" id="bkmrk--1"><div class="css-eqp5gg"><div data-alt="" data-collection="contentId-494172" data-context-id="494172" data-file-mime-type="" data-file-name="file" data-file-size="1" data-height="259" data-id="a648f24d-783d-4ce8-b109-7e70bcd2bdf9" data-node-type="media" data-renderer-start-pos="63" data-type="file" data-width="422"><div class="_2rko18qm _vchhusvi _kqswh2mm _ect4ttxp _p12f1osq _c71l1osq _1bsb1qmm _4t3ine4n _1hlmd0i9 _1rquusvi _eg541i5c _mts3kb7n _1ntskb7n _yfmhtlke _5sb1v00u new-file-experience-wrapper" data-media-vc-wrapper="true" data-testid="media-card-view" id="bkmrk--2"><div class="_1reo15vq _18m915vq _2rko18qm _1e0c1txw _kqswh2mm _p12f1osq _1bsb1osq _4t3i1osq _c71l1osq media-file-card-view" data-cursor="pointer" data-test-media-name="43.png" data-test-progress="1" data-test-source="remote" data-test-status="complete" data-testid="media-file-card-view"><div class="_kqswstnw _1bsb1osq _4t3i1osq _1e0c1txw _2lx21bp4 _1bah1h6o _4cvr1h6o" data-testid="ImageRendererWrapper">![](blob:https://ecowiki.atlassian.net/6a91c67f-2b7d-4951-8750-bdf2c891045e#media-blob-url=true&id=a648f24d-783d-4ce8-b109-7e70bcd2bdf9&collection=contentId-494172&contextId=494172&width=422&height=259&alt=&clientId=113268fe-fe5b-4bc3-8ff3-07965dbf1d18)</div></div></div></div></div></div><div class="fabric-editor-block-mark fabric-editor-alignment align-center" data-align="center" id="bkmrk-figure-143%3A-receiver">**Figure 143: Receiver illustration as <span data-highlighted="true" data-vc="highlighted-text">VLR</span> or <span data-highlighted="true" data-vc="highlighted-text">ILR</span>**</div>The receiver consists of 5 panels (Figure 144); Receiver identification, antenna pointing, antenna patterns identification, reception characteristics and interference criteria.

[![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/dI0Aodt8VjislogV-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/dI0Aodt8VjislogV-image.png)

<div class="rich-media-item mediaSingleView-content-wrap image-align-start css-1w64z13" data-layout="align-start" data-media-vc-wrapper="true" data-node-type="mediaSingle" data-renderer-start-pos="295" data-vc="media-single" data-width="512" data-width-type="pixel" id="bkmrk-figure-144%3A-receiver"><div class="css-19hvt83"><div data-alt="" data-collection="contentId-494172" data-context-id="494172" data-file-mime-type="" data-file-name="file" data-file-size="1" data-height="557" data-id="e17d7236-272a-469c-85ed-0fc9b475dc64" data-node-type="media" data-renderer-start-pos="296" data-type="file" data-width="1142"><div class="_2rko18qm _vchhusvi _kqswh2mm _ect4ttxp _p12f1osq _c71l1osq _1bsb1qmm _4t3ine4n _1hlmd0i9 _1rquusvi _eg541i5c _mts3kb7n _1ntskb7n _yfmhtlke _5sb1v00u new-file-experience-wrapper" data-media-vc-wrapper="true" data-testid="media-card-view" id="bkmrk-figure-144%3A-receiver-1"><div class="_1reo15vq _18m915vq _2rko18qm _1e0c1txw _kqswh2mm _p12f1osq _1bsb1osq _4t3i1osq _c71l1osq media-file-card-view" data-cursor="pointer" data-test-media-name="44.png" data-test-progress="1" data-test-source="remote" data-test-status="complete" data-testid="media-file-card-view"><div class="_kqswstnw _1bsb1osq _4t3i1osq _1e0c1txw _2lx21bp4 _1bah1h6o _4cvr1h6o align-center" data-testid="ImageRendererWrapper">![](blob:https://ecowiki.atlassian.net/e87e2100-3ee3-4bef-a569-cd1167e0a093#media-blob-url=true&id=e17d7236-272a-469c-85ed-0fc9b475dc64&collection=contentId-494172&contextId=494172&width=1142&height=557&alt=&clientId=113268fe-fe5b-4bc3-8ff3-07965dbf1d18)**Figure 144: Receiver GUI**</div></div></div></div></div></div>