Communications Engineering 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

Communications Engineering Coaching Materials

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