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Other Measurements

I also ran quick checks on a few other routers. TRENDnet's TEW-818DRU V2 had no spec violation for 5 GHz. But for some reason, I wasn't able to successfully find the 2.4 GHz beacon pulse. I know it was there, however, because the SSID showed up on a wireless client.

I chiseled away the goop securing the connectors on Edimax' BR-6478AC AC1200 router and was able to check the 5 GHz radio, which I found did not exceed FCC transmit power limits. But I must have broken the connection on the 2.4 GHz connector I picked at because I couldn't measure a signal there.

Edimax BR-6478AC AC1200 board

Edimax BR-6478AC AC1200 board

You might ask why no D-Link routers were measured. I had only the DIR-868L, having given the others away. But D-Link clearly doesn't want anyone making any measurements in the field since silicone goop was applied to all antenna connectors.

D-Link DIR-868L inside

D-Link DIR-868L inside

EnGenius prides itself on producing high power routers, so I disassembled its ESR1750 to get at its two QCA-based radios. The connections for each radio had only a little goop on them and were easy to get apart so that I could attach the power sensor. I checked only one chain on each radio but found power levels well below the FCC limits. I measured 10 - 12 dBm on Channels 36 and 48, 17 - 18 dBm on Channels 149 and 153 and 16 dBm on Channels 1 and 6.

EnGenius ESR1750 board

EnGenius ESR1750 board

Closing Thoughts

This is admittedly not an exhaustive study and I'm not claiming laboratory accuracy for the measurements. But the only two FCC limit violations I found in the ASUS routers didn't require high accuracy; they were pretty obvious.

So while I haven't found rampant boosting of transmit power above FCC limits, it sure looks like NETGEAR has at least two examples for its suit against ASUS.

My thanks again to Rohde & Schwarz for the loan of the NRP-Z11!

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