Forum Discussion
Warning, don't fry your modem.
Yes, there is DC power supplied by the modem going through the coax to power the radio on the dish. Under certain situations the modem can be damaged if the power is shorted out. There are protections built in but they don't always work.
Also one reason we say to power down the modem from the wall receptacle, not the plug on the back of the modem.
GabeU wrote:
It was most likely from an insufficient amount of dielectric grease being applied to the connector or the installation tech just forgetting to do so. Zap!
Just a tidbit of information, while typical coax connectors are not IP rated, the application of an additional dielectric will change impedence and negatively impact throughput, as the cable, connectors, transceiver, and receiver are all designed to be impedence-matched. Just an interesting thought to consider. Which is more important? Ingress protection, or maintaining transmit power and throughput without any significant loss or gain (depending on how you look at it)
vladams2015 wrote:
Just a tidbit of information, while typical coax connectors are not IP rated, the application of an additional dielectric will change impedence and negatively impact throughput, as the cable, connectors, transceiver, and receiver are all designed to be impedence-matched...........
In this case the coax was actually cut in two, so the connector wasn't a factor.
It's been over 30 years siince I worked with coax ( I didn't enjoy the experience ). I don't remember using any sort of grease on the connectors. We eventually replaced all the coax in the plant with fiber optics. Which is about the only thing that will work in a central Florida phosphate plant We all celebrated when the last piece of coax was gone.
