Orthogonal signals Study guides, Class notes & Summaries

ROC I: Lesson Quizzes Only what enables set-top boxes (STB) and data over cable service interface specification (DOCSIS) modems to operate as completly separate systems that operate independent of each other? - STB and DOCSIS modems are assigned different upstream channels with different upstream channels with dedicated receivers in the headend what did the 1.1 version of DOCSIS introduce, incorporating solutions for transporting real-time data applications (such as voice traffic) over...

What functionality is integrated in all modern signal level meters (SLM) to measure specific parameters of a digital modulation carrier containing digital television (DTV) and Data Over Cable Service Interface Specification (DOCSIS) signals? Correct Answer Digital signal analyzer functionality What is a risk of performing automated measurements on a sample of channels instead of all channels? Correct Answer Problems in unmeasured channels may go undetected. Using a digital signal analyzer,...

NCTI ROC II BOOK II FINAL Test 1 question with correct answers rated A+ 2023 When pressure testing a drop system to check for leakage, What must be done before applying the test signal? - correct 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? - correct answer To avoid false detection of leaks. When ...

What is the frequency and maximum data rate for 802.11a? Correct Answer 5GHz 54Mbps When an AP is set to not broadcast SSIDs beacons continue; but have a null value for the SSID. Correct Answer True Which one of the following points a lightweight access point to one or more controllers? Correct Answer DHCP option 43 If an access point does not advertise its SSID the clients must know the SSID to join the wireless network. Correct Answer True When roaming between APs the client is dis...

What is the fundamental requirement of OFDM? It has orthogonality. The frequency spacing is 1/T which leads the signal to be orthogonal. If the bit time of the carrier is T, then the base frequency must be chosen to be a multiple of 1/T. OFDM Multiple carrier signals at different frequencies that send some bits on each channel. OFDMA Like OFDM, except that it is a multi-user version. Multiple access is achieved by assigning subsets of subcarriers to individual users. SC-F...

This converter converts the numbers stored in memory to proportional voltages that control the brightness on a CRT monitor CORRECT ANSWERS: Digital to Analog Converter The Digital Scan Converter is AKA: CORRECT ANSWERS: Image Memory This is where images are stored in the ultrasound system: CORRECT ANSWERS: Scan Converter The system component which is most responsible for transmit focusing: CORRECT ANSWERS: Beam Former The process of filling in the empty spaces between scan lines:...

Flow Cytometry [FACS] 100% Pass |Graded A+| flow cytometry measures? *ans* measurement of cell properties using light in a fluid medium major components of flow cytometry *ans* laser, beam blockers shield detectors, flow cell containing cell stream, detectors that capture photos of disturbed light and fluorescence principle of flow cytometry *ans* cells disrupt LASER beam to create light signals characteristic of cell size and complexity. the LASER excites fluorochromes att...

What is PCA? (5 key points) Principal Component Analysis is a statistical technique used for dimensionality reduction, crucial when dealing with high-dimensional data in machine learning. It works by transforming original variables into new ones, called principal components, which are linear combinations of the original variables. Key Points: 1. Principal Components: Principal components are the directions in the data that maximize variance. The first principal component captures the most...

system technician conventional Exam guide 2023 with complete solution Discussing modulation In a hybrid fiber/coax (HFC) network what type of crude amplitude modulation (AM) detector causes common path distortion (CPD)? envelope detector What are the peaks and minima of the amplitude modulation (AM) waveform envelope related to The amplitude of the modulation signal. What geometric shape is a sine wave based upon? A right degree triangle What are the three elements of a carrier wave th...