s="code" href="classpwr.html#a206af127b867c41215a106449d34f571">pwr</a>(50, 5);</div><div class="line">P2 = <a class="code" href="classpwr.html#a206af127b867c41215a106449d34f571">pwr</a>(-50, {1, <span class="stringliteral">&#39;mw&#39;</span>});</div><div class="line">P3 = P1+P2;</div></div><!-- fragment --><p> will create: P1, a power object describing a signal (50 dB SNR, 5dBm power) P2, a power object describing noise (-50dB SNR, 0 dBm power) then add them, returning P3, which should have about 5dB SNR,