Modulation analyzer and level measurement device
First Claim
1. A modulation analyzer and level measurement device for use with a CATV system, the device comprising:
- a tuner;
a band pass filter directly connected to the tuner, wherein the band pass filter is connected electrically downstream from the tuner;
an RF detector directly connected to the band pass filter, wherein the band pass filter is connected electrically downstream from the band pass filter, and wherein the RF detector is configured to convert a frequency domain voltage stream to a time domain voltage stream;
a sync detector directly connected to the RF detector, wherein the sync detector is connected electrically downstream from the RF detector, and wherein the sync detector is configured to receive the time domain voltage stream and extract timing information from the time domain voltage stream; and
a peak detector connected electrically downstream the sync detector, wherein the peak detector is configured to generate a consistent voltage stream when the sync detector provides a voltage stream comprising synchronous voltages.
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Accused Products
Abstract
A method is provided for determining a modulation of a CATV channel, the modulation being one of a digital modulation and an analog modulation. The method includes passing at least a portion of a tuner output from a tuner to a RF detector, and passing a RF detector output from the RF detector to a sync detector. The method further includes attenuating at least a portion of a sync detector output to create a remaining portion of the sync detector output, and passing the remaining portion of the sync detector output to a peak detector. The method further includes passing an output of the peak detector to a subsequent device, the output of the peak detector indicating whether the modulation of the CATV channel.
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Citations
10 Claims
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1. A modulation analyzer and level measurement device for use with a CATV system, the device comprising:
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a tuner; a band pass filter directly connected to the tuner, wherein the band pass filter is connected electrically downstream from the tuner; an RF detector directly connected to the band pass filter, wherein the band pass filter is connected electrically downstream from the band pass filter, and wherein the RF detector is configured to convert a frequency domain voltage stream to a time domain voltage stream; a sync detector directly connected to the RF detector, wherein the sync detector is connected electrically downstream from the RF detector, and wherein the sync detector is configured to receive the time domain voltage stream and extract timing information from the time domain voltage stream; and a peak detector connected electrically downstream the sync detector, wherein the peak detector is configured to generate a consistent voltage stream when the sync detector provides a voltage stream comprising synchronous voltages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10)
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9. A method for determining a modulation of a CATV channel, the modulation being one of a digital modulation and an analog modulation, the method comprising:
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passing at least a portion of a tuner output from a tuner, through a band pass filter, to a RF detector, wherein the band pass filter directly connected between the tuner and the RF detector; generating, by the RF detector, a RF detector output by converting a frequency domain voltage stream to a time domain voltage stream; passing the RF detector output from the RF detector to a sync detector directly connected to the RF detector; extracting, by the sync detector, timing information from the time domain voltage stream; attenuating at least a portion of a sync detector output to create a remaining portion of the sync detector output; passing the remaining portion of the sync detector output to a peak detector; generating, by the peak detector, a consistent voltage stream when the sync detector provides a voltage stream comprising synchronous voltages; and passing an output of the peak detector to a subsequent device, the output of the peak detector indicating whether the modulation of the CATV channel.
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Specification