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LAN & WAN Reviews

Performance - more

Adding more simultaneous streams adds a bit more bandwidth. With two up/downlink streams running simultaneously, total throughput moves up around 8% more to 565 Mbps vs. the single up/downlink test. Average throughput is fairly evenly distributed for three out of four connections.

IxChariot simultaneous up / downlink x2

IxChariot simultaneous up / downlink x2

Location E is where most of my worst powerline noise sources (our smartphone and tablet chargers) live. The Noise tests basically plug and unplug a particularly noisy wall-wart while an IxChariot stream is running and compare the results to a stream with all noise sources unplugged.

The composite plot below compares the baseline Location E downlink test, run with all noise sources unplugged with a run with the noise source plugged in then uplugged at the 30 second mark. Throughput recovers to the maximum no-noise-source value within a few seconds, just as other AV2-MIMO products do.

IxChariot Location E downlink compare - Noise source removed @ 30 seconds

IxChariot Location E downlink compare - Noise source removed @ 30 seconds

I saw a thread in the forums from someone who said they saw powerline throughput reduced more than 50% when something was plugged into an adapter's passthrough outlet. So I ran a simple test. The top line in the plot below is downlink throughput in Location E with no noise sources plugged in.

The _plugged_into_adapter.tst line is the same wall-wart noise source used in the test above, plugged into the 421E's pass-through outlet at the receiving end of the connection. Because the signal level from the transmitting adapter is lower at the receiving adapter, noise will have the most effect. But the plot shows the basically the same throughput as the no-noise-source top line plot. The _no_remove.tst line shows lower throughput when the same wall-wart is plugged into an outlet on the other side of the same room. My conclusion: the 421E's pass-through outlet does an effective job of noise filtering.

IxChariot Location E downlink compare - multiple noise sources

IxChariot Location E downlink compare - multiple noise sources

Closing Thoughts

There has been a lot of jockeying for #1 position in the Powerline Ranker of late among AV2-MIMO adapters. And it looks like we have a new #1 with the TPL-421E2K the latest product earning our Ranked #1 award for AV2-MIMO Powerline performance.

SmallNetBuilder Ranked #1

As you look at the Ranker Performance Summaries below, remember the numbers don't change, but relative rank does as new products are added to the Charts database.

Ranker Performance Summary Comparison

Ranker Performance Summary Comparison

While the 421E2K earns only #1 sub-rank, it edges out the TP-LINK TL-PA8030-KIT by having two #2 subranks vs. the TP-LINK's two #3 sub-ranks. But if you're looking for the adapter most likely to provide higher throughput at a distance, it still looks like the TP-LINK holds an edge for downlink throughput only.

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