Broadband Digital Installer Test

Broadband Digital Installer Test What information is typically stored in a signal level meter's (SLM) channel plan? - The SLM channel plan typically includes the channel number, center frequency, channel bandwidth, modulation type, and symbol rate. What advantages are there to performing automated measurements with an SLM? - Automated measurements help ensure consistent measurement practices among different technicians. What parameters of the RF carrier should be measured when diagnosing or qualifying a digital TV (DTV) service? - To diagnose or qualify a DTV service, measurements such as power levels, modulation error ratio (MER), bit error rate (BER), etc. should be taken using a digital signal analyzer. When connected directly to the broadband cable network, what must be done to the digital television set for it determine each channel's modulation and encoding scheme? - When connected directly to the broadband cable network, the DTV must be instructed to "scan" all of the incoming channels and store each channel's modulation and encoding scheme into memory. Which customers were originally targeted to use digital terminal adapters (DTA)? - The DTA was originally targeted to those customers with analog TVs that subscribed to basic-only service. What technology enables individual digital set-top boxes (STB) to receive authorization to access-encrypted program content via a subscriber management system (SMS), aka billing system? - Addressable technology enables individual digital STBs to receive authorization to access-encrypted program content via an SMS. What device is being deployed as the next evolutionary step for the STB? - The cable gateway is being deployed as the next evolutionary step for the STB. What was a practical limitation of the integrated entertainment system cabinet? - The size of the picture tube was limited to what could be installed in the integrated entertainment system cabinet. Why did the digital versatile disc (DVD) player/recorder replace the videocassette recorder (VCR) in many entertainment systems? - The VCR was replaced in many entertainment systems because of the DVD's compact size, excellent video and audio quality, and the player's ease of use. What could happen if system components are stacked on top of processor-intensive components such as a set-top box (STB)? - Stacking components on top of processor-intensive components such as an STB can restrict the air flow that dissipates heat, which can cause the STB to malfunction or fail. What functionality has been added to many signal level meters (SLM) to measure specific parameters of a digital modulation carrier containing digital television and DOCSIS signals? - Digital signal analyzer functionality What is a risk of performing automated measurements on a sample of channels, instead of all channels? - Problems in unmeasured channels may go undetected Using a digital signal analyzer, what measurements are typically taken to troubleshoot and diagnose a digital television signal? - Carrier average power level, modulations error ratio and bit error rate How do cable operators ensure that only paying customers are receiving digital television service? - Cable operators prevent unauthorized reception of DTV services by scrambling or encrypting the services. When would a DTA be installed in the customer premises? - When the customer subscribes to basic-only services What determines how many days TV program schedules can be stored on a digital set-top box? - The amount of available STB memory, the number of program channels and how often the carousel server delivers new information. A cable gateway can replace which broadband cable operator supplied devices? - The cable gateway could replace a cable modem and digital set-top box What forced customers to choose between the integrated entertainment system furniture cabinet and upgraded system components? - Advances in technology, such