# 3.2.5 Positioning the VLT vs VLR

Define now the positions of transmitters and receivers of the victim link.

[![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/vIRhk4dX97qHmygd-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/vIRhk4dX97qHmygd-image.png)

**Figure 76: Selecting the Tx to Rx path tab**

SEAMCAT allows defining the locations of the Victim link receiver and the Victim link transmitter in a fixed manner (correlated) or following some distribution (uncorrelated) as summarised in Figure 77. The input parameters are detailed in section 5.4, and the algorithms are detailed in ANNEX 13:

[![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/9WbxoZmsxhQel0B9-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/9WbxoZmsxhQel0B9-image.png)

**Figure 77: Summary of the <span data-highlighted="true" data-vc="highlighted-text"><span class="_kqswh2mm"><span class="_5pioz8co _189e1dm9 _1il9buyh _19lc184f _d0altlke" data-testid="definition-highlighter">VLT</span></span></span> ↔ <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> location capability in SEAMCAT**

In this exercise, set the distance between the ***<span data-highlighted="true" data-vc="highlighted-text">VLT</span>*** and ***the <span data-highlighted="true" data-vc="highlighted-text">VLR</span>*** as fixed (correlated distance) (x = y = 2 km) as illustrated in Figure 78.

[![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/mUS8XZV2gvyA3tR2-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/mUS8XZV2gvyA3tR2-image.png)

**Figure 78: Distance between the Victim link transmitter and the Victim link receiver (Victim Link)**

It is assumed that the Tx and Rx are both outdoor as shown in Figure 79.

[![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/oaPKmW2hur1V5iab-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/oaPKmW2hur1V5iab-image.png)

**Figure 79: Example of setting up the outdoor/indoor ratio**

For this, select the correlated distance option of SEAMCAT as shown in Figure 80. In SEAMCAT, the origin of the coverage radius (see ANNEX 13:) is the **transmitter** (this is also reminded in the GUI) of the link.

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

**Figure 80: Illustration of the correlated distance in SEAMCAT**