Abstract: The present invention provides a converter filter that includes a bandstop frequency range to protect against overloading of the input circuits of legacy converter boxes from the relatively high power upstream return path signal between 5 and 85 MHz. The converter filter also functions to pass the downstream signal path with minimal loss and reflection. The converter filter comprises a circuit including a low pass filter and high pass filter in parallel with each other that operate to substantially pass signals in a first frequency band of approximately 5 to 52 MHz and a second frequency band of approximately 85 MHz to 2 GHz while substantially blocking signals in a third frequency band of approximately 52 MHz to 85 MHz.

Abstract: What is presented is a legacy converter filter. The legacy converter filter comprises a first circuit that operates to substantially pass signals in a first frequency band of approximately 5 to 52 MHz; a second circuit that operates to substantially pass signals in a second frequency band of approximately 85 MHz to 2 GHz; and a third circuit that operates to substantially block signals in a third frequency band of approximately 52 MHz to 85 MHz.