Cascade amplifier - Study guides, Class notes & Summaries

Progression: Maintenance Tech I - II Conventional: Exam In the tree-and-branch architecture, how is the downstream signal from the trunk fed to the distribution branches? What is a common solution when congestion from modem activity and traffic becomes unacceptable in a hybrid fiber/coax (HFC) network? What technologies are defined in DOCSIS 4.0 to help sustain the hybrid fiber/coax (HFC) network infrastructure for several more years? How can a less-experienced technician identi...

Progression: Construction Coordinator I - II Exam Answered Correctly. A chain trencher A return path sweep-and-alignment system is used to adjust which of the following? Anomalies, such as echoes and blind spots, can hide cable faults or cause a technician to misinterpret the signature of a time domain reflectometer (TDR) waveform. What causes an echo on a waveform TDR? As the RF signal travels on the coaxial cable, one portion of the signal may be attenuated more than the others. ...

What do clampers do? - Answer- Add DC to AC signal. A transistor in a Common Emitter transfers an internal resistance from a low resistance in emitter base to? - Answer- High resistance in collector base. Ie (Emitter current) = ? - Answer- Ib (base current) + Ic (collector current) When does cutoff occur in a Common Emitter? - Answer- When Emitter PN junction is reversed. A Common Emitter has a gain of how much? - Answer- 10 How does a Common Emitter affect the phase of an input s...

Limiting action happens in series when a diode is________ and in parallel when a diode is________. - Reverse biased, forward biased. What is the purpose of a diode limiting circuit? - To limit amplitude of the input. What do clampers do? - Add DC to AC signal. A transistor in a Common Emitter transfers an internal resistance from a low resistance in emitter base to? - High resistance in collector base. Ie (Emitter current) = ? - Ib (base current) + Ic (collector current) When does...

Limiting action happens in series when a diode is________ and in parallel when a diode is________. - Answer Reverse biased, forward biased. What is the purpose of a diode limiting circuit? - Answer To limit amplitude of the input. What do clampers do? - Answer Add DC to AC signal. A transistor in a Common Emitter transfers an internal resistance from a low resistance in emitter base to? - Answer High resistance in collector base. Ie (Emitter current) = ? - Answer Ib (base current) + ...

RCDD Practice Test Latest Questions With Complete Solutions. C If the input signal power to a communication system is 1 W and the output power is 1 mW, the system attenuation is: A. 3 dB B. 20 dB C. 30 dB D. 40 dB E. 1000 dB B The signal at the input to a balanced twisted pair cable is 10 mW. The cable is 1000 feet long and has an attenuation of 1 dB per 100 feet. This cable is connected to the input of a receiver. The noise level at the input to the receiver is 1 microwatt. What is t...

Progression: Maintenance Tech I - II Conventional: Exam In the tree-and-branch architecture, how is the downstream signal from the trunk fed to the distribution branches? What is a common solution when congestion from modem activity and traffic becomes unacceptable in a hybrid fiber/coax (HFC) network? What technologies are defined in DOCSIS 4.0 to help sustain the hybrid fiber/coax (HFC) network infrastructure for several more years? How can a less-experienced technician identify what non-stand...

In the tree-and-branch architecture, how is the downstream signal from the trunk fed to the distribution branches? - Correct answer-Within each trunk amplifier, a portion of the downstream is fed to a bridger amplifier to boost the signal before being split and routed to the distribution branches. What is a common solution when congestion from modem activity and traffic becomes unacceptable in a hybrid fiber/coax (HFC) network? - Correct answer-Node splitting, the subdividing of serving ar...

What advantage is realized by increasing the voltage in a broadband cable network from 60 volts alternating current (VAC) to 90 volts? - Correct answer-Operating with 50% more voltage reduces the voltage drop and current drawn in the network for more efficient power utilization. How does surge protection at the input and output of a ferroresonant power supply defend against voltage surges? - Correct answer-By passing voltage surges (within the surge device rating) to ground without damage....

When pressure testing a drop system to check for leakage, What must be done before applying the test signal? - The technician must isolate the drop system from the hybrid fiber/coax (HFC) network by disconnecting the drop at the distribution tap. Why do some leakage detection systems utilize a leakage carrier modulated with a tagging signal? - To avoid false detection of leaks. When all three sections of a pulse code modulator (PCM) are combined, what function can be performed? - · As an ...