- When the noise power ratio NPR of a laser is plotted on a chart, what happens when the maximum input power to the laser is reached? When setting up the reverse path through the optical network, when should the RF output level from the optical...Link: https://gcss.army.mil/(X(1)S(zk11if2l3qmjzd5vf2icx4gh))/training/
- What might be associated with a cable modem termination system CMTS input port with too high of an attenuator pad installed? Why must separate test carriers be injected into the return path when aligning the return amplifiers? When aligning the...Link: https://ebcstoreonline.com/product/oswaal-cbse-question-bank-class-11-accountancy-book-chapterwise-%26-topicwise-includes-objective-types-%26-mcq%27s-%28for-2021-exam%29-paperback-%E2%80%93-1-may-2020.html
- Adjust the modems so they all provide the same signal levels at the amplifier inputs. Modem transmit levels are controlled by long loop AGC based on the receive level at the head-end. There will be a large range of losses from the modems to the first RF active. Modems with shorter return paths will be turned down by the long loop AGC to achieve the proper level. Determine the optimum drive level at the laser, 2. Inject an equivalent level reference signal at the transmitter. Adjust receiver output level and head-end combining to achieve proper levels at the CMTS demodulator.Link: https://arec.alabama.gov/arec/(X(1)S(hr0viuz2q3ar4ibv0yqzunbq))/pages/faq.aspx
- Establish reference levels at the CMTS demodulator, or other head-end reference point. Determine the optimum RF input level for the RF actives. Adjust return amps for unity gain. Work from node outward, inject known levels at the RF amp input, adjust gain and equalizer to get the same reference levels at the head-end. When the modem demodulator has the proper level, the optical transmitter will be operating at optimum drive level. In order to meet the setup rules, the return system components have to be aligned in a very specific order. Determine the optimum drive level for the return laser. This is the most critical step, because the laser establishes the dynamic range limits for the system. Also, all subsequent steps are based on the reference levels established here. These levels must be based on the TOTAL power expected at the transmitter, even though at system turn on fewer signals may be present. The total RF drive power is then divided among the signals to be carried to establish the power in each RF signal.Link: https://svuonline.org/en/quality/quality-assurance
- For mixed signal types, this is done on a power per Hz basis. For setup, one or two CW carriers will be substituted for the digital signals. The level of the CW setup signal is set equal to the power of the digital signal it has replaced. The CW carriers are injected at the node in order to establish an easily measurable reference. At the head-end, the return signals may be split and combined several times. The RF level at the optical receiver must be adjusted to overcome these losses so the modem demodulator sees its required level. After the Rx adjustment is made, any point in the signal path at the head-end may be used as a reference point. The CMTS demodulator input is a good choice.Link: http://neoclimat-zvi.ru/night-college-yard/what-happens-after-ita-submission.html
- Determine the optimum drive level for the RF amplifiers. For digital signals, the BER dynamic range of the RF amplifiers is very wide, so this level is less critical than for the laser. Ideally, the input levels at the RF amplifiers would be the same as for the node. Start with the first amp out from the node. Based on the available testpoint configuration, inject the CW test signal that gives the equivalent desired level at the amplifier input.Link: https://hindi.examsbook.com/railway-gk-questions-and-answers-in-hindi
- Adjust the gain and equalizer of the return amp to give the previously establisher reference level back at the head-end. Move to the next amp and do the same. All return amps should have the same input levels, and be adjusted to give the same reference level back at the head-end. When all the amps are adjusted for proper levels at the head-end, they will also drive the optimum levels at the return optical transmitter.Link: https://youtube.com/watch?v=QgqLyAfUsZE
- Before doing any combining know the following: How many nodes will there be in the entire system. Set the receiver outputs to obtain these levels. The next slide is tree and branch with four mouse clicks adding nodes. Tree and branch. Explain the accumulated energy of the return cascade. Click and nodes 4 will drop in.Link: https://itexamanswers.net/lab-84-configuring-eigrp-routing-using-wildcard-masks.html
- The next slide shows how the funnel effect was recreated in the headend. Click to reshow the nodes. The point is that the funnel effect has been re-created. The next slide starts system behavior with modem carriers. Shows the accumulative or additive effect of a cascade. Also explain how the different frequencies are used so that the speed of the modems remains fairly constant.Link: https://musiciansfriend.com/guitars/ibanez-acfs580ce-artwood-fingerstyle-all-solid-grand-concert-acoustic-electric-guitar
- The noise level to peak carrier is input dependant. The next slide shows what noise and ingress can do to the return path spectrum. Any one modem can also create enough noise or the noise environment of the house can disrupt the return path. Same as the previous slide. Click the mouse 5 times and see the noise increase from one modem to the headend. The next slide explain the effect of hot levels or incorrect balancing of the return path. At the first active the inputs are increased forming distortions at the TX and rx outputs. At the next device the inputs are also at the wrong level which now puts the laser into clip which creates what appears to be other carriers.Link: https://igenex.com/wp-content/uploads/Form_TEST_REQUISITION_Domestic.pdf
- The next slide is a picture of ingress vs. Time The next slide is impulse noise. Click the mouse and explain what the numbers refer to. What output is needed to overcome the combining losses to achieve the inputs needed at the CMTS? What is the required input to the return amplifier? How much passive loss can I accept? How much loss can I expect in the home? What is the output level of the device in the home? What is the rated operating level? The next covers a typical return cascade. For short links RIN is the principle noise source. High inputs cause Intermodulation noise, clipping and other distortions which result in a lower carrier to noise floor differential. The next slide starts the optical link set up. Person 2 would inject carriers at the last active. Person 1 would then inform 2 if the levels received were at the right amplitude and if they were flat.Link: http://fnm.tums.ac.ir/userfiles/pdf/BscMidwifery.pdf
- This would make it easier for the tech. In the field looking at the handheld TV to see. The tech in the field would then proceed to the next active and inject the carriers. While watching the TV he would then change the pad and equalizer until the carriers rested on the horizontal line outline by the headend tech. This method was only as good at the resolution of the TV being used in the field. The next slide shows today's method. Use two CW carriers to align the transmitter and receiver. The the stealth or Calan meters take over. As long as the embedding losses of the active devices remains constant, a reference is taken at the node.Link: http://pearsonlongman.com/adult/pdf/Giving_opinionsTN.pdf
- The TM is designed to enable deployment of multi-gigabit data services up to 2. The CM is designed to enable deployment of multi-gigabit data services up to 2. Utilizing the latest modulation and video compression technologies,the DSR down-converts and transcodes up to 12 input HD video sources simultaneously across four satellite transponders, all from a single Programmer. Customizable multiplex creation with Statmux output provides highly flexible transport stream grooming options and ensures delivery of the highest quality video. The C4 CMTS increases subscriber satisfaction and retention via a self-healing design that maintains system services without interruption, providing industry-leading The E CER software is based on that of the C4 CMTS, meaning that the E benefits from over ten years of refinements in stability, hitless failover, and performance at high scale.Link: https://certspass.com/new-examsfree-downloading-exam-az-500-dumps-pdf-from-braindump2goq34-q44.html
- No other CCAP-ready platform today enjoys a proven software code base for these critical functional areas. It provides increased module density, as well as superior scalability, performance and flexibility. The 4RU chassis accepts up to 16 plug-n-play application modules, thereby minimizing headend space requirements. A two rack-unit mini-chassis that holds three application modules is also available. With superior nm and nm products, the OmniStar GX2 enables you to offer more revenue-generating services. This node is designed to support the evolving technologies and services being introduced in broadband networks, e.Link: https://tcall.tamu.edu/twcael/TWCTransmittals.htm
- The ARRIS SG meets the latest demands of single and two-way broadband network applications including broadcast video, telephony and data. Fully configured to meet your specific system requirements, the Motorola SG is the answer in a rapidly expanding global market. The node enables incremental and independent forward and return path segmentation to address network growth. The C8M uses a bright, two-line vacuum fluorescent display VFD that provides access to all modulator controls and is accessed via a convenient menu system. Front panel RF, IF, aural subcarrier and video test points are provided. Easy rear panel fuse access is also available. The input sources may be switched automatically or manually. Provisions for adjusting peak-to-average audio level in four steps is provided with the audio AGC. The video DC clamp can be referenced to sync level, burst level or both, and an adjustable video white level clip function is also provided.Link: https://itrauma.org/wp-content/uploads/2014/04/Charpentier-WhyFix-itinPatientAssessment.pdf
- Video AGC is also a standard feature. This compact, high performance Cable Modem termination System CMTS is ideal for small or medium sized distribution hubs or for larger sites in the earlier stages of market penetration of broadband services. It provides the upstream link that is needed for communications with set-top terminals. These amplifiers can be used to compensate for long drops and excessive splitting losses. These two-way capable amplifiers offer high gain E-GaAs , MHz expanded bandwidth, channel capability, high output levels, improved ergonomics, improved distortion performance, seven diplex filter options, 16 dB return loss, and Bode equalization.Link: https://labcorp.com/help/patient-test-info/comprehensive-metabolic-panel-cmp
- These products have all of the same features and performance as the standard N-series. ARRIS maintains the commitment to provide the latest technology while maintaining backward compatibility and allowing future upgradability. Network powering of telephony devices is critical for system reliability in these applications. They also provide a convenient mechanism for monitoring and troubleshooting the signal as it passes through the cable headend. It is designed to deliver outstanding video and audio performance. With a variable front end and bypass capabilities, the DSR is ideally suited for network conversion from analog to digital.Link: https://en.wikipedia.org/wiki/Defense_Intelligence_Agency
- For signaling existing headend equipment, a DSRX DTMF tone generator interoperates with ad insertion systems, while 3 sets of contact closures are provided for general purpose device control. The Motorola DSRX digital satellite receiver is designed for cable operators and other commercial satellite operations who want to maintain their signal in a digital format. Digital data outputs include: Internet protocol data, isochronous data and asynchronous data. This set-top is ideal for all-digital video networks, which require service operators to furnish a set-top for every television in the home. The DCT is made in a convenient small form factor W 5. The DRC has a world-class library of infrared IR codes so that it can be programmed to control the set-top plus up to 3 additional IR devices.Link: https://cpb-us-w2.wpmucdn.com/sites.udel.edu/dist/c/3448/files/2016/01/Timed-Up-and-Go-TUG-Test.pdf
- Most CMTS vendors have not supported this in their firmware until the past year. In most cases the firmware that is available is still in beta testing in cable operator labs to ensure cable modems and networks can support it — why? The bonding of two, three or four upstream channels in an RF DOCSIS network creates a lot of challenges such as finding enough RF spectrum, resolving overloading return path lasers, isolation issues and much more. Some of these items have been addressed in the Speeding Upstream Articles written by John Downey and me. The focus of this article will be on the mechanics of upstream channel bonding and how it works more from a DOCSIS protocol perspective. Upstream channel bonding has a lot in common with downstream channel bonding. Like downstream channel bonding, upstream bonding consists of two or more channels active as an Upstream Bonding Group UBG. In order to enable multiple upstream channels in a cable modem, a special mode is turned on in the cable called Multiple Transmit Channel mode MTC mode.Link: https://iiimef.marines.mil/Coronavirus/fbclid/IwAR2gh5PPBocqv66F2HOVeCZiEjLfG-FAotGibDqZe5jzYvGGKgIB0NhYAfE/igphoto/2002562369/igphoto/2002562371/igphoto/2002592155/
- At a very basic level, the CMTS assigns each upstream channel with a service flow. Why would load balancing be necessary? Further, there could be impairments on some upstream channels seen by some modems. Higher levels of service flows will be established for QoS by the CMTS, this will be another SID Cluster and spread across the bonding group so that load balancing can also occur for that particular QoS service flow to achieve the best possible performance in the case of traffic or impairments. A channel in a bonding group may become unusable due to say upstream impairments.Link: https://shiksha.com/college/imi-delhi-international-management-institute-qutab-institutional-area-420/placement
- In this case, if the CMTS becomes aware of the outage, it will stop providing opportunities for CMs to transmit on that channel i. MAP grants. Its smart enough to know not to transmit any data on the down channel. So upstream channel bonding can be pretty straight forward. Of course these are beyond the scope of this blog and I encourage you to read the spec if you are interested in this level of detail. Previous events can be seen under the video tab or blog search podcast. Watch industry leaders on youtube please hit the subscribe button and let us know what you think and remember to share.Link: https://reddit.com/user/sienn-apearce456/comments/me7jqw/1z0148_exam_questions_leaked_with_1z0148_dumps/
- You can find any slides at the bottom of the page or slideshare. Find out about events or articles by following us on Twitter , LinkedIn or Facebook too.Link: https://insightsonindia.com/2021/04/07/insights-current-affairs-6-april-2021-revision-through-mcqs/
Sunday, June 6, 2021
Scte Return Path Test Answers
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