Review on 2-Pack - DIRECTV Broadband Deca Ethernet to Coax Adapter - 3rd Gen (with 2 USB Power Cables) by James Vilchez

They are great for making a fast ethernet connection (100Mbps) over 75 ohm coax ( TV and radio) FM cable) . It wasn't the right device for my needs, but it ended up working great. You cannot connect by simply plugging a 5V DC power adapter into the micro USB port. I assume they also need a USB data connection if you want to use this method of powering devices. I think they use some kind of power saving protocol for communication if you power them via USB. This means that you need drivers for this configuration. The devices I wanted to connect in the attic (USB TV tuner) and basement (Ethernet network) didn't have that capability, so I gave up on a micro-USB connection to power them. Since I wanted to use one of these devices in the attic as a simple Fast Ethernet connection to my media center in the basement, I had to connect 12V DC over the same coax cable I used for data. I used a satellite/TV splitter with DC capability on the satellite path in both the basement and attic to feed and separate DC from the coax. No RF or data signals are carried on satellite frequencies, so it works well as a direct DC injector/bias tee. I didn't have a proper DC connector for the unusual 12V DC connector on these devices, so I disassembled the outer case and soldered the 12V DC connector off the PCB. The only way to remove the connectors from the board is to carefully cut the metal grounding cap off the connector and then heat each solder joint by gently pulling it out of the tiny hole it was soldered into. I soldered the speaker wire to the power connectors and a standard DC connector to a short length of speaker wire to be able to power the unit with 12V DC. Installation required some soldering/desoldering skills and the ability to use small cutting tools. The end result installed in a matter of weeks and works flawlessly, connecting my two TV tuners mounted directly to my attic antennas to my media server in the basement. This exercise allowed me to isolate and use two antennas, one on local and the other on remote transmission towers, covering multiple channels that abut each other in the TV band - all without filtering or worrying about the length of the cable to eliminate destructive interference . It also allowed me to connect the tuner directly to the antenna, eliminating virtually all cable loss, allowing me to get the last dB the antenna was capable of.