Exam (elaborations)
NCTI ROC II BOOK II FINAL TEST 1
- Course
- Institution
NCTI ROC II BOOK II FINAL TEST 1
[Show more]
Seller
Follow
Greaterheights
Reviews received
Content preview
NCTI ROC II BOOK II FINAL TEST 1When pressure testing a drop system to check for leakage, What must be done before
applying the test signal? - Answer- 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? - Answer- To avoid false detection of leaks.
When all three sections of a pulse code modulator (PCM) are combined, what function
can be performed? - Answer- · As an analog-to-digital converter (ADC)
What prevents the subcarriers in orthogonal frequency division multiplexing (OFDM)
from interfering with each other? - Answer- · The peak power of each subcarrier aligns
with the minimum power of the adjacent subcarrier.
What two significant signals go into the mixer to create the intermediate frequency (IF)?
- Answer- · The RF signal frequency at the output of the front-end filter and the local
oscillator (LO) signal.
Which class of amplifier efficiency approaches, but never achieves, 100%? - Answer- ·
Class D amplifier.
What is the output waveform coming from a ferroresonant power supply? - Answer- · A
quasi-square wave.
What instrument should be used to accurately measure the output voltage of a
ferroresonant power supply? - Answer- · A true root mean square (RMS) digital
multimeter (DMM)
What could a light dimmer with a silicon controlled rectifier (SCR) create in a customer
premises? - Answer- · Radio frequency interference (RFI).
What is a characteristic of a bipolar junction transistor (BJT) common emitter
configuration? - Answer- · The output signal is taken from the emitter.
What is done to an operational amplifier (op amp) to create a low-pass filter circuit? -
Answer- · A capacitor is placed in parallel with the feedback resistor that is connected to
the op amp inverting input (-).
What is the core objective of the Data Over Cable Service Interface Specification
(DOCSIS) Provisioning of Ethernet passive optical network (EPON), or DPOE, access
architecture? - Answer- · To make the EPON elements appear and operate as DOCSIS
elements to the existing DOCSIS-based back office provisioning operations.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Greaterheights. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
82871 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now