I was not sure if the question should be place into “build” category or “product support”, my apologies for the convenience.
I would like to have more information about the usage of Fathom-X and maybe Fathom-S.
I try to add an independent Sony camera (ILCE-7M2, with enclosure) to the existing system (BlueROV2 + accessories) in order to take better picture and use our camera equipment.
We have done a working build with USB/RJ45 (V.TOP NT50 - https://www.amazon.com/Network-Extender-Ethernet-Driver-Free-Version/dp/B01K9V7D18). This build implies an extra Ethernet cable with a limit size of 30m. We retrieve the video and we are able to take pictures which stores into the SD card. The video and the command is done thanks to Sony application on a computer. See image below :
After that, we have try to done the same system without the extra Ethernet cable and go through a Fathom-X and a Tether cable. See image below :
We have used 2 kind of device for USB/RJ45
- one cheapest USB/RJ45, D+/D- directly sent to pin 1/2 ethernet
- one more sophisticated (with ASIX) but not working (only one twisted pair)
The following picture show the whole end system (the red path correspond to the test path and the previous image) :
I encounter some troubles with the add of the Fathom-X to the system.
My Questions :
I would like to Know if the Fathom-X fits our needs. Would it be better to use a Fathom-S to link directly USB communication through Tether cable ?
We have seen that the Fathom-X used 2 twisted pairs for the Ethernet connector (100BASE-T2 ?), otherwise the USB/RJ45 in our possession used only one (100BASE-T1). Is there a specific USB/RJ45 converter to use ? Moreover the Fathom-X Topside Interface (FXTI) contains a USB to Ethernet converter. Do you have a reference ?
See image below of Fathom-X routing (RD-/RD+ et TD-/TD+).
Any help would be appreciated.