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16 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Question
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Answer
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Hint
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Two types of receive antennas mounted on a tower?
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over the air and terrestrial microwafe antennas
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2.1
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Name the processes whereby signals are beamed to a satellite and retransmitted back to earth for reception by a TVRO antenna
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"uplinking
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and downlinking"
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What two services can the cable sytem provide through its connection to the telephone network?
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Telephone and Internet access
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4.1
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Where can locally produced signals originate?
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system's own studio or a remote location in the service area
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5.1
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Describe the basic Function of a headend.
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"takes all incoming signals and first processes them in some way
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and then combines thiem to forma composite broadband RF signal that is sent out through the cable system"
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How eoes a cable system send warnings from the Emergency Alert System to customer's TV sets?
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"EAS equipment in the headend automatically receives warnings for emergencies and potential disasters
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and overrides regular programming with the alert warnings on customers' TV sets."
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What occurs in the headend to prevent unauthorized viewing of various channels?
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Scrambling various channels at the headend occurs to prevent unauthorized viewing.
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8.1
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What headend equipment is needed in an HFC system?
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"In a hybrid fiber/coax system
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the headend contains the necessary equipment to convert RF signals into light. A laser then transmits the light signal out of the headend and onto tfiber-optic cable."
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how does the cable company provide reliable electrical power in the broadband distribution system?
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The cable company uses standby and uninterruptible power supplies to provide reliable electrical power throughout the broadband distribution system in the event of a utility company power outage.
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11.1
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Which device in an HFC distribution system converts the received lght signal to RF signals?
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An optical node converts the veceived light signal to RF signals.
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12.1
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What is the major benefit of processing digital signals at the headend?
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"A major benefit of processing digital signals at the headend involves compression
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which reduces the channel space (bandwidth) needed to transmit a signal."
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Which devices help compensate for signal losses in the coaxial trunk and feeder systems?
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A variety of amplifiers compensate for signal losses in the coaxial trunk and feeder systems.
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13.1
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Which device is installed on the feeder cable to direct the broadband RF signal to the drop system?
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A tap is installed on the feeder cable to direct the broadband RF signal from the feeder system to the drop system.
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14.1
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Where are the taps located in aerial and underground plants for connecting customer premises drop cables?
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An aerial tap is mounted close to a nearby pole. An underground tap is mounted inside a pedestal.
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15.1
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"To offer two-way services over cable
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such as telephone
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a cable system needs an active ________ path."
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