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Performance - Coax

Corinex AV200 Powerline And CableLAN Set The Pace For Alternative Home Networking
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I was only able to give the AV200 Coax adapter a few cursory throughput checks since my in-home test setup still needs more development. My original plan was actually to test the Corinex AV200 Coax product against MoCA-compliant (Multimedia over Coaxial Alliance) adapters. I've been after MoCA to supply product for review since CES 2005 and thought I was finally going to succeed after an encouraging meeting at this January's CES. But after a number of emails with a MoCA rep after the show, I finally got the word that no MoCA product would be forthcoming since member companies weren't able to part with product due to "certification" and "standards-ratification" activities.

So I had to settle for two relatively unstressful tests. The first test just connected two AV200 Coax adapters via a 6' piece of RG 6 coax with an IxChariot test pair plugged into the adapters' Ethernet ports. I ran the same script that I used for the AV200 powerline tests, with the results shown in Figure 16.

Figure 16: AV200 coax direct back-to-back throughput
(click image to enlarge)

I suppose I shouldn't have been surprised by these results, which were essentially the same as those I got in the Location 1 powerline test. But I had thought (hoped?) that given the superior electrical environment of coaxial cable over power wiring, that DS2 could have tuned its OFDM signal processing magic to eke out higher throughput.

But I suspect that the coax product's real advantage comes from less throughput degradation over distance, even though I couldn't effectively test that...yet! Instead I had to settle for simple tests using the two-way splitters that came packaged with each AV200 Coax adapter. For one test, I cabled the IN connectors of the two splitters together with a short piece of RG 6, then connected each AV200 Coax adapter to one of each splitter's OUT connectors in a back-to-back splitter configuration.

Figure 17: AV200 coax throughput through two back-to-back splitters
(click image to enlarge)

The results are shown in Figure 17, which are essentially the same as Figure 16. I also connected the splitters in a cascade configuration, i.e. an OUT of one splitter to the IN of the other, but the results were again essentially the same as with the direct cable connection.

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