NCTI maintenance 2 to 3 practice exam questions with correct answers 100% accurately.

The main elements of the optical transmitter are the electrical interface, data encoder/modulator, laser and - correct answer Optical interface What process must happen before digital modulation can occur in an optical transmitter? - correct answer The data must be encoded. In networks transporting data rates higher than_______, F-P lasers are considered inadequate. - correct answer 2.5 Gbps What is the best way to set up the RF power levels for a QAM carrier? - correct answer Use a spectrum analyzer with a power measurement function and set the vertical markers to each side of the QAM carrier. What are the main elements of an optical receiver? - correct answer Demodulator, electrical interface, optical detector optical interface A technician is determining whether the optical power into an optical receiver is within the acceptable dynamic range, if the optical power is too high, but the loss budget agrees with the design, what should be done to optimize the optical power? - correct answer install an optical attenuator Typically, what is the first step when adjusting an optical receiver? - correct answer Turn on the optical receiver Which type of optical amplifier produces no measurable distortion to the modulated light wave? - correct answer EDFA. Which component of a digital optical network is used to receive digital modulation light waves and convert them to an electrical signal? - correct answer Optical transponder. Which type of optical coupler provides the least amount of insertion loss? - correct answer Fused. The number of rectifiers used in a DC power plant design depends on what? - correct answer The load that is placed on the system. What is true of online UPS systems? - correct answer They are recommended for commercial applications such as data centers and telecommunications operations. What are the concerns for RFoG and FTTx systems? - correct answer How and who will provide AC power to the ONT at the customer premises. What is true of offline UPS systems? - correct answer Offline UPS systems route incoming power directly to connected devices and switch to a battery backup during a power interruption Why are backup AC generators included in many commercial AC UPS and DC power systems? - correct answer To provide AC power during a prolonged utility power interruption. Why is -48 VAC with a positive ground used by the telecommunications industry? - correct answer This reverse polarity is a means of mitigating electrolytic corrosion on the outside plant. Which of the following is true of a centralized power node? - correct answer It can provide sufficient power for a fiber-optic node including OSP amplifiers and customer premises network interface devices (NID) for telephony service.