Netgear PLT review
Trendnet also have has a "500Mbps" product which doesn't appear to offer the advertised bandwidth - see:
Can you check if the products are based on the Atheros chipset. If they are, ask them for a reply on the following - Atheros don't seem to want to answer the questions:
"The documentation for the AR7600 / AR1500 refers to the RD-4700-GE Reference design which claims to be "Emissions Compliant" to "CE Class A and Class B".
I assume that you are referring to EN55022? Please could you confirm whether or not this is the case. During the last three years that I have been involved with PLC, I have neither tested nor seen test results indicating passing class A emission levels, let alone class B. All devices that I am aware of are +30dB over these levels. In fact the following Homeplug presentation categorically states that "Safety, immunity and harmonics are correct but almost all PLC devices pass over the CISPR 22 class A, B limits so failed the test and we could not generate (directly) the DoC (Declaration of Conformity) needed for Europe" See:
I am also quite concerned to see these devices operating at up to 68MHz. Please can you confirm which frequencies are notched in the spectrum 30MHz - 68MHz, as your products appear to operate across the Amateur 50-52MHz band which will cause a considerable amount of concern within the radio amateur community?
I look forward to your reply"
Thanks in advance
73 Richard M0SNR