(Last Updated On: December 8, 2017)
This is the Section 4 Module 5 of the compiled Communications Coaching Materials taken from various sources including but not limited to past Board Examination Questions in Electronic System and Technologies (EST), Communications Books, Journals and other Communications References. This particular Coaching Notes in Communications Engineering has random Questions and Answers in random topics. Make sure to familiarize each questions to increase the chance of passing the ECE Board Exam.
Communications Engineering Coaching: Section 4 Module 5
Mobile Switching Center |
Base station to telephone Central Office |
Modal noise |
Interference due to different modes |
MOSFET transistor |
High reliability for power amplification in TV |
Move the feed |
To eliminate the feed horn |
MPEG 1 |
What video standard deals with low data rate video such as are often found in CD‐ROMs, and on the internet? |
MPEG 2 |
Broadcaster’s Choice |
MPEG 4 |
The current digital video specification that used video compression |
MPEG 4 and MPEG 7 |
Object‐based |
Nanofiber |
Silica Waveguides where the diameter is smaller than the transmitted light. |
Narrow viewing angle |
Disadvantage of using LED |
Near field communication |
Short range communication for devices within 10cm to 4in |
Network Layer |
Routing selectivity |
Not Fast ATM |
FUNI |
Not standardized by 802.11b |
OFDM |
Number Record Printer |
May "number" ‘to sa tanong |
Numerical Aperture Mismatch |
Contributes most in loss |
OFDM |
Used in wireless USB |
Offset the horn to the center of the |
Eliminate the feedhorn shadow |
Open Shortest Path First (OSPF) Protocol |
A routing protocol for Internet Protocol (IP) networks. It uses a link state routing algorithm and falls into the group of interior routing protocols, operating within a single autonomous system (AS). |
Optical Soliton |
a pulse that travels without distortion due to dispersion |
Optimal viewing distance |
Optimal viewing ratio, preferred viewing distance |
Orange |
Multimode fiber optic cover jacket |
OFDM |
A wideband modulation technique used in multiple orthogonal carriers each modulated by pulse and amplitude. |
Output Back‐off (OBO) |
Derated from normal analog … |
Output Back‐off (OBO) |
Most important parameter(?) in digital TV transmitter |
OUTSIDE EXTENSION |
Telephone system outside the building |
Outside Extension |
Separated from main station |
Overwritten every 30 minutes |
In avionics, "black box" is used in navigation for recording purposes. Black box is ____. |
Parallelor Flash A/D conversion |
A/D conversion use in high‐speed application such as video signal processing, medical imaging and radar detection system. |
Phase Correction |
Correct the phase |
Phonocardiograph |
A graph showing the sounds of the heart |
Physical Layer |
Transmission of bits |
Polar‐Coordinate Navigation System |
Indicates bearing and distance |
Port Operation System |
Maritime mobile communication system in or near a port |
Port Operations System |
|
P‐picture or Predictive picture |
Motion … and prediction |
Production Telecine |
Used in production of TV program and commercial |
Provides no security since the signal can be easily intercepted |
Which is not true about wireless fiber? |
Proximity Cards |
Generic name for contactless integrated circuit device used as payments |
Proximity Cards |
used for security access and payment systems |
QAM |
Amplitude and phase modulation |
Quality |
The UTP cable can be determine by cable _______ |
Radar shadow |
Areas covered from radar coverage example hills.. |
Radiates equally |
Why circle? |
Radio direction finder indication (RDFI) |
Shore effect causes an error in ____. |
Reflective Star Coupler |
It is the enlarge section of fiber with numerous… on the other end mirrored surface and reflective mechanism on the other end. |
Registered Jack |
RJ means |
Relay Mechanism |
Difference between Iridium and Globalstar |
REVERSE LINK |
Mobile to base station |
RG 58/U |
Cable wire with highest attenuation at 400 MHz |
RG 58/U |
Highest attenuation at 400 MHz |
Ribbon Cable Design |
Also called Loose tube |
Ribbon Cable Design |
Poorest water blocking capabilities |
Ribbon Design |
Laid in ribbon of group of 12, 12 meters high |
RJ 45 |
Most commonly used UTP cable |
Roentgen |
Measure of amount of x ‐ ray radiation to create 2.09×10^8 ion pairs at STP |
Septate Waveguide |
One or more septa |
Signal Quality Detector |
Pin 21 of RS232 |
Complete List of Communications Engineering Coaching Materials
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