<p><span class="h-card" translate="no"><a href="https://ioc.exchange/@azonenberg" class="u-url mention">@<span>azonenberg</span></a></span> nice. I just noticed the trace seems to be on both sides of the pad - what&#39;s the deal with that?</p>

<p><span class="h-card" translate="no"><a href="https://chaos.social/@gsuberland" class="u-url mention">@<span>gsuberland</span></a></span> Yep.</p><p>This is the host-side launch for the connector that will be going from the FPGA board to the two line cards (two connectors, total twelve 5 Gbps NRZ lanes, per line card) as well as to the front panel dual SFP28 carrier (one connector, total four 25 Gbps NRZ lanes).</p>

<p><span class="h-card" translate="no"><a href="https://ioc.exchange/@azonenberg" class="u-url mention">@<span>azonenberg</span></a></span> nice! I assume you&#39;re targeting Zdiff=100Ω on this?</p>

<p>I&#39;m pretty happy with the top side Samtec ARF6 launch simulations now.</p><p>S11:<br />* Red: No cutout, -12 dB at 10 GHz, -7 at 20 GHz, -4.8 at 30 GHz<br />* Blue: Rectangular ground cutout the size of the pad, -22.5 at 10 GHz, -16.4 at 20 GHz, -11.7 at 30 GHz<br />* Green: 30um larger than the pad on all sides (1.06 x 0.41 mm), -30.5 at 10 GHz, -22 at 20, -15 at 30.</p><p>With the oversized cutout it&#39;s more than good enough for QSGMII and 25Gbase-R.</p><p>TDR:<br />* Red: No cutout, 64Ω Zdiff at the launch<br />* Yellow: Pad-sized cutout, 86Ω<br />* Orange: Oversized cutout, 94Ω</p>

<p>My new marketing pitch and the summary of my <a href="https://io.mwl.io/tags/writing" class="mention hashtag" rel="tag">#<span>writing</span></a> career:</p>

<p><span class="h-card" translate="no"><a href="https://mastodon.social/@whitequark" class="u-url mention">@<span>whitequark</span></a></span> I get 403 forbidden but I&#39;m interested.</p><p>Our equivalent for the 2003 blackout is amazing <a href="https://www.energy.gov/sites/prod/files/oeprod/DocumentsandMedia/BlackoutFinal-Web.pdf" target="_blank" rel="nofollow noopener" translate="no"><span class="invisible">https://www.</span><span class="ellipsis">energy.gov/sites/prod/files/oe</span><span class="invisible">prod/DocumentsandMedia/BlackoutFinal-Web.pdf</span></a></p>

<p>Someone&#39;s gonna commit First Degree Glitter with Intent to Sparkle. </p><p><a href="https://mastodon.online/tags/USpol" class="mention hashtag" rel="tag">#<span>USpol</span></a> <a href="https://mastodon.online/tags/ice" class="mention hashtag" rel="tag">#<span>ice</span></a> <a href="https://mastodon.online/tags/glitter" class="mention hashtag" rel="tag">#<span>glitter</span></a></p>

<p><span class="h-card" translate="no"><a href="https://this.mouse.rocks/@KolaMagpie" class="u-url mention">@<span>KolaMagpie</span></a></span> &quot;vulnerable to large pythons, monitor lizards, New Guinea singing dogs, and Papuan eagles&quot;.</p>

<p>Most birds: &quot;We&#39;re colorful because we can just fly away from most of our natural predators&quot;</p><p>Cassowary: &quot;I&#39;m colorful because fuck you try me I&#39;ll gut you like a fish.&quot;</p>