The Model 2501 Blocking Capacitor 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.
Example: Using a 12-volt IR system and not using Model 2100A wall plates at all coax drops,