Communications Engineering Coaching Materials: Section 5 Module 23

(Last Updated On: February 10, 2020)

Communications Coaching Materials: Section 5 Module 23

This is the Section 5 Module 23 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 5 Module 23

Docsis downstream
27Mbps – 36Mbps

Maximum for Class II-A at nighttime

10 – 50 KW

DOCSIS upstream

10 MBPS

Flexible endoscope no. of bundles

10,000

10 BASE T

100m

1000 Mbps

1000baseT

Generic for Ethernet standard

100 BASE T

Fiber Bragg grating

-.011 DBM/MHZ

Fiber optic advantage

0.5 DB / KM LOSS

Fiber optics theoretical BW (past 10 yrs.)

100 THZ

Multimode numerical aperture

0.275 ± 0.3

Accuracy of GPS; 3D; P mode

0.1 m/S

Home RF data rate

1.6 MBPS

Loss of Microelectromechanical System (MEMS)

0.1 DB

RFID intermediate range of frequencies

10 – 15 MHZ

Eccentricity of tundra

0.2684

Bulk coefficient

1/M

3.1 – 10.6 GHz Wireless USB range

10 M

“electrotechnology”

IEC

0.25 – 2.5 mW

CLASS II BLUETOOTH

1% accuracy

DOPPLER REFERENCE HEADING

Absorbs sound energy

ACOUSTIC SINK

Active FRID over passive RFID

167

AM modulation technique, Most efficient

SSB-SC

AM modulation technique, Poor performance

SSB+C

Application of FO in medicine

ENDOSCOPY

Attractive to terrestrial broadcasting

LONG SYMBOL DURATION

Barcode

INTERLEAVES 2 BY 5

Beige connector

62.5 µM

Black box

OVERWRITES EVERY 30 MINUTES

Black connector

50 µM

Bluetooth 4.0

480 MBPS

Bluetooth 4.0

APRIL 21, 2010

Bluetooth speed; both direction

721 KBPS

Bluetooth v.2 + EDR; practical

2.1 MBPS

Caller ID, it will appear after 2s

1200 BPS

CIDR

1993

CIDR …

SUPERNET

Cladding diameter of single mode glass optic fiber of ITU-T
G.652

125 µM

Class B FM contour distance

52 KM

Coined “Artificial Intelligence” in 1956

JOHN MCCARTHY

Color subcarrier Sine wave peak

-20 TO +20

Core diameter of single mode glass optical fiber of ITU-T
G.652

9 – 10 MICRONS

Critical diameter of 633nm fiber optic cable

450 µM

Cut off wavelength of a single mode glass optic fiber of ITU-T
G.652

1100 – 1280 µM

Date and time

DATE TIME GROUP

De facto in wireless card adapters

WIEGAND INTERFACE

DECCA positioning accuracy

20 – 50 M

Diffracting of sound waves around human body

BODY DIFFRACTION EFFECT

Does not change in polarization

SOLITON

Duct; reduces sound energy

DUCT SILENCER

End of message

MESSAGE TRAILER

Facsimile, black & white lines

STUTTER

Fiber (defies theory of relativity), creates controversy

FASTER THAN LIGHT

Fiber low loss region, minimal dispersion for single mode

1150 – 1350 NM

Flexible endoscope FO with light beam produced

LEACHED IMAGE BUNDLE

Fo

OPTICAL SOLITON

Fo configuration in the 1980s

62.5 / 125

Frequency of active RFID

900 MHZ, 2.4 GHZ

Frequency used to for connection of Type A and Type B
proximity cards

13.56 MHZ

Function of radial distance; gradually

GRADED INDEX

Gallium Arsenide LASER line width

800 – 1700 NM

Generic term for wireless card

PROXIMITY CARD

Glonass center frequency

1572.5 – 1227

GPRS center frequency

1575.42 – 1227.6 MHZ

GPS accuracy

GEOMETRIC DILUTION OFPRECISION

GPS to maintain accuracy … sending updates on a _ basis

DAILY

HDTV 16:9 optimal viewing distance

3.3

High engaged communicator; virtual community

HYPERCOMMUNICATOR

HiperLAN

GMSK

Hue, saturation, brightness

HSV MODEL

Hyperbolic line, 100 to 200 kHz

LORAN C

(85.6 x 56.38mm)

ID-1

(125 x 88 mm)

ID-3

ID-002

105 X 74 MM

In Avionics, it is a satellite system used for Air Traffic
Control when plane is above sea

AEROSAT

Increase tensile strength in FO

SILVER BROMIDE

interbuilding ( in between buildings) unstable plant
environmen

Loose buffer

Intrabuilding (inside building and also used in telecoms)

TIGHT BUFFERED

ISO members

163

ITU members

191

Keyed oscillator radars

MAGNETRON

Laser line of argon…

510nm

Latest technology

CUTTING EDGE TECHNOLOGY

Least range shortest coverage

WIRELESS FIBER

Long wire / wave antenna

BEVERAGE ANTENNA

M x N

STAR COUPLER

Making fiber optics

CHEMICAL VAPOR DEPOSITION

Medium rate, BPSK and DQPSK except

CONVOLUTIONAL CODE

Medium to high A/D

SUCCESSIVE APPROXIMATION

Moving behind building

SLOW FADING

Multi-graded index diameter of fiber optic

62.5 +-3um

Multimode

62.5

Multimode fiber color jacket, outer covering

ORANGE

Multimode without repeater. _ km

FEW

Nanotube diameter – core nanofiber

50 NM

Nb: 009, Yag

MACH ZEHNDER INTERFEROMETER

New technology with risk of unreliability

BLEEDING EDGE TECHNOLOGY

No. of devices connected to a single host, WUSB

127 DEVICES

Non-government; set standards

ISO

Not continuous / no change

SINGLE STEP INDEX

Not included in technical work

CORRESPONDENT MEMBERS

NOT true about Frame User for Network Interface

NOT A FAST ATM

NTSC…video…

YIQ model

OFDM….attracted to terrestrial propagation

Long code duration

Omega Global range

88%-98%

Per Morse code character

9.296

Perforator, for aircraft missile

LEAKY WAVE ANTENNA

Poor water blocking design, 204 cables

RIBBON CABLE DESIGN

pressure gradiant, 204 lines, for water blocking, 12 fibers

RIBBON DESIGN

Protection to public and working personnel around RF equipment

C 95.1 – 1991

Protocol for sending data from card reader

WIEGAND PROTOCOL

Radar nautical mile. _ ms

12.355

RF burn

3RD DEGREE BURN

Satellite dish that has a size that of a pizza

256 – 400 KBPS

Satellite ephemeris

16

Shore line

RADIO-DETECTION FINDER

Splits evenly into two outputs

Y-COUPLER

Splits optical transmitter into two or more

TREE COUPLER

Standard for proximity cards

14443

Surface radiated per unit area

ACOUSTIC RADIOSITY

Terrain Contour Navigation accuracy

50 M

Timing issues are important

DATA STREAMING

Toxic fumes when imploded

BERRYLIUM OXIDE CERAMIC

Transit system accuracy, Transit system has exceptional
accuracy compared to NAVSTAR,GPS and GLONASS

500 M

TV commercial, production

PRODUCTION TELECINE

TV data transmission

802.14

TV, black & white pattern

WEDGE

Unlicensed frequency of WUSB

3.1 – 10.6 GHZ

Used by RIP

BELLMAN-FORD ALGORITHM

V2.0 + EDR (Bluetooth)

𝜋/4 DQPSK

Voting rights / early country members

MEMBER BODIES

Widescreen HDTV clock rate

148.5 MHZ

Wireless payment

CALYPSO

WUSB is capable of sending _ at a distance of 3m

480 MBPS

X-ray … dangerous

15 KV

UMTS

Communication to everyone, everywhere

1900

1996

1800

1994

900

1992

TACS

900 MHZ

AMPS

900 MHZ

DAMPS

800 MHS

Minicells

3 km

Macrocells

30 km

Microcells

Few street

CDMA increase factor

2-3 Ghz

Message not delay

Message nonreputation

What is the value of V

0 – 2.405

DCET____ greater than PHS

30%

EDFA

980 nm

DNIC, what CCITT recommendation?

X.121

DECT

1.88 – 1.9 Ghz

CDMA____ greater than TDMA

30%

63 devices each with 6 bits identification code …. Length of
cable ______meters

72

trombone

EDFA

20 meters

ANSI standard of ADCCP

ANSI X3.28

PHS frequency range

1895 -1918

40%

45%

vertical radiation angle of rhombic antenna

20 degrees

RF Bluetooth uses, frequency hopping .. periodicity of …

23hours and 18mins

IF superhetordyne..

30 – 60 MHz

quantum efficiency of silicon pin diode

95%

packet over sonnet

155Mbps

error free. Error recovery

Data link layer

Insertion loss of single and multimode

EIA/TIA 455-34

point defect …OTDR?

EIA/TIA 455-59

OTDR

EIA/TIA 455-61

Reflectance

EIA/TIA 455-107

ADCCP?

EIA/TIA 455-167

insertion loss of multimode?

EIA/TIA 526-14

dopant

Heavy metal fluoride

greatest source of Intrinsic losses?..

Numerical Aperture Mismatch

88 to 98% global coverage

. Omega

Physical layer

Log-in log-out

Session layer

behind a building

Slow fading

Technology where PC is connected directly to phone system

Telephony Application Programming system

same data rate

V.32 & V.29

It is a protocol used to connect the other packet switching
network

X.75

The following are rates/distance of ADSL(Asymmetric Digital
Subscriber Line) except…

4.098Mbps and 14000ft downstream…

ADPCM, used to

Will be reduced to half of its rate

looking for available optical windows

Open shortest path first

Is not true about OFDM

Standardized as IEEE 802.11b

OFDM , depending on the modulation depth… code word ______
bits

2,4,6 bits

Wave antenna … single wire supported at ___ above the ground

3-6m

The highest layer in the hierarchy and is analogous to the
general manager of the network by providing access to the OSI environment.

application layer

data tracking

Transport

A nonexistent target which shows up on a radar scope as the
result of time

false target

High degree of STABILITY of radar

STALO

Includes all the telephone equipment, exchange, loop

TERMINAL ROOM

150 m3/min

10kW

20 kHz

200 m3/min

CAT 6…

200Mbps

>23 dB…..

Complete List of Communications Engineering Coaching Materials

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