RF terminate/permit system
First Claim
1. A terminate or permit device implemented in a community antenna television (CATV) system comprising a premise generating an upstream bandwidth, said terminate or permit device comprising:
- a first switch having a position responsive to a control, the position comprising a first position for conducting the upstream bandwidth from the premise, and a second position for terminating the upstream bandwidth;
a detection circuit coupled to a transmission line, the detection circuit for generating an input from the upstream bandwidth; and
a discrimination circuit responsive to the input, the discrimination circuit comprising;
a first circuit generating a plurality of long pulses comprising a first long pulse with a first leading edge, and a second long pulse with a second leading edge, anda second circuit responsive to the first leading edge and the second leading edge, the second circuit generating the control,wherein the control corresponds to an interval between the first leading edge and second leading edge, and wherein the interval for the first position is less than the interval for the second position; and
wherein the first circuit comprises a multi-vibrator that has at least one resistor with a resistor value, and at least one capacitor with a capacitor value, and wherein each of the resistor value and the capacitor value is selected so that the long pulses have a pulse length that is determined in accordance with, tw=α
×
R×
C,where tw is the pulse length, a is a constant, R is the resistor value, and C is the capacitor value.
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Accused Products
Abstract
There is provided a terminate or permit device that includes an internal circuitry, which discriminates between noise and non-noise transmissions. In one embodiment, the internal circuitry comprises a switch and termination unit (“STU”) with a signal path that is used to terminate and/or permit the upstream bandwidth based on the presence of non-noise transmissions. The internal circuitry also comprises a signal processing unit (“SPU”) with a processing circuit, which is configured to identify the non-noise transmissions from the upstream bandwidth, and to cause the STU to permit the upstream bandwidth based on the presence of the non-noise transmissions.
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Citations
18 Claims
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1. A terminate or permit device implemented in a community antenna television (CATV) system comprising a premise generating an upstream bandwidth, said terminate or permit device comprising:
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a first switch having a position responsive to a control, the position comprising a first position for conducting the upstream bandwidth from the premise, and a second position for terminating the upstream bandwidth; a detection circuit coupled to a transmission line, the detection circuit for generating an input from the upstream bandwidth; and a discrimination circuit responsive to the input, the discrimination circuit comprising; a first circuit generating a plurality of long pulses comprising a first long pulse with a first leading edge, and a second long pulse with a second leading edge, and a second circuit responsive to the first leading edge and the second leading edge, the second circuit generating the control, wherein the control corresponds to an interval between the first leading edge and second leading edge, and wherein the interval for the first position is less than the interval for the second position; and wherein the first circuit comprises a multi-vibrator that has at least one resistor with a resistor value, and at least one capacitor with a capacitor value, and wherein each of the resistor value and the capacitor value is selected so that the long pulses have a pulse length that is determined in accordance with, tw=α
×
R×
C,where tw is the pulse length, a is a constant, R is the resistor value, and C is the capacitor value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A signal conditioning device implemented in a community antenna television (CATV) system for controlling an upstream bandwidth from a premise, said signal conditioning device comprising:
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a transmission line comprising a first switch having a position responsive to a control, the position comprising a first position for conducting the upstream bandwidth from the premise, and a second position for terminating the upstream bandwidth; a detection circuit coupled to the transmission line, the detection circuit for generating an input from the upstream bandwidth, wherein the detection circuit comprises a directional coupler receiving the upstream bandwidth, a log detector coupled to the directional coupler, and an amplifier coupled to the log detector; a discrimination circuit coupled to the amplifier so as to receive the input, the discrimination circuit comprising; a pulse adjuster circuit comprising a multi-vibrator for generating a plurality of long pulses, the long pulses comprising a first long pulse with a first leading edge, and a second long pulse with a second leading edge, and a counting circuit comprising a counter responsive to the first leading edge and the second leading edge, the counter counting a number of the long pulses, wherein the number of the long pulses for the first position is greater than the number of the long pulses for the second position; wherein the multi-vibrator has at least one resistor with a resistor value, and at least one capacitor with a capacitor value, and wherein each of the resistor value and the capacitor value is selected so that the long pulses have a pulse length that is determined in accordance with, tw=α
×
R×
C,where tw is the pulse length, a is a constant, R is the resistor value, and C is the capacitor value. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of terminating or permitting an upstream bandwidth generated by a premise implemented in a community antenna television (CATV) system, said method comprising:
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generating an input by a detection circuit; converting the input to a plurality of long pulses by a first circuit, the long pulses comprising a first long pulse having a first leading edge, and a second long pulse having a second leading edge; assigning, by a second circuit, a control based on an interval between the first leading edge and the second leading edge; and switching a first switch to a position in response to the control, the position comprising a first position for conducting the upstream bandwidth from the premise, and a second position for terminating the upstream bandwidth, wherein the interval for the first position is less than the interval for the second position; wherein the first circuit comprises a multi-vibrator that has at least one resistor with a resistor value, and at least one capacitor with a capacitor value, and wherein each of the resistor value and the capacitor value is selected so that the long pulses have a pulse length that is determined in accordance with, tw=α
×
R×
C,where tw is the pulse length, a is a constant, R is the resistor value, C is the capacitor value. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification