Single channel notch filters block individual pay channels and also serve as a restrictive device against channels that subscribers prefer not to receive. Because these filters have inherently narrow bandwidths, they require careful maintenance of their stability. PPC’s patented design incorporates hermetic connector interface seals that prevent moisture from entering the filter, thus eliminating frequency drift.
PPC’s single channel traps remove a customer-specified single channel or frequency. This passive device is used to block the reception of any unauthorized channel from a nonsubscribing cable television viewer. The trap provides a narrow notch at theselected video carrier eliminating all visual information.