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Using your existing coax to distribute infrared signals? Protect your equipment with blocking capacitors!The model 2501 is used in systems where DC and/or infrared control pulses are present on the coaxial cable. When such signals are not wanted or might be shorted out by downstream video products, a model 2501 blocking cap can be inserted in an individual coaxial cable feed. The capacitor serves like an open circuit to DC and low frequency IR control signals, yet passes all RF signals on.For example, if you are using a 12-volt IR system and not using ChannelPlus 2100A wall plates at all coax drops, insert a model 2501 on the end of the coax.