LaRoche recommends the use of dedicated high quality L-band splitters. They cost more, but they are specifically designed for 950 MHz to 1,450 MHz or higher frequencies. This important satellite connection matrix is often jammed into the rack or under the floor, and most of the cables are unsupported. In some ways, the satellite signals are like water. When you switch between many types of cables and have bad 'valves and fittings,' the correct 'pressure' will never reach the receivers.
Many systems then use poor quality line amps to make up for the losses they have already incurred.
It is not uncommon to view relatively clear video on my test set caused by L-band leakage from the headend's satellite antenna cabling, splitters and power inserters. Trouble can sometimes happen when a lot of signals are brought into the headend in common conduit or when the wiring and components are hidden away haphazardly to keep the headend looking superficially neat. This includes cabling between the splitters, power inserters and satellite receivers. If hardline cable must be used, take extra care when installing the connectors. Remember, you're trying to make this perform well in the 950 MHz to 1,450 MHz range.