Communications Engineering Coaching Materials: Section 4 Module 1

This is the Section 4 Module 1 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 1

95%	PIN diode is important in detecting light in fiber optic system. Silicon PIN diode exhibits maximum quantum efficiency of______.
0.10%	GPS accuracy, Doppler frequency
5%	In order to maintain a loss less than 0.3 dB, the displacement of the fibers must be less than ____
0.2684	Eccentricity of tundra orbit
30%	CDMA system provides capacity of ____ greater than TDMA system
30%	DECT capacity _____ greater(?) than PHS
95%	Silicon PIN Diode … quantum efficiency of Erbium
99.99%	12 dB crest factor of a digital TV
99.99%	… _______ of the time
3.3	In 16:9 HDTV, the optimal viewing distance is ____ times the picture height
3.579545	Exact color subcarrier
5	Home RF is ____ times greater than Bluetooth
7	Number of categories of UTP cable.
9.296	Morse Code
12.355	Radar nautical miles in microseconds
16	Number of ephemeris parameters
127	Wireless USB (WUSB) can connect to how many interfaces?
163	Number of countries that are members of ISO out of 203 countries
191	Number of countries that are members of ITU
802.14	IEEE standard for TV + data
802.14	TV
802.5	Token Ring
1992	GSM900
1993	In what year did Bluetooth SIG complete Bluetooth Core Specification 4.0
1993	CIDR
1994	GSM 1800
1996	GSM1900
10000	Number of bundles in flexible endoscopy (3 micron)
21‐Apr‐10	Bluetooth V.4.0
11‐Jun‐10	Approval of MC 02‐06‐2010
65535	Unicode
‐0.011 nm/°C	Braggs gratings
300 lb.	Maximum tensile load for lashed aerial cable
‐41.3 dBm/MHz	Spectral density of Ultrawide band (UWB)
‐41.3 dBm/MHz	Spectral density of Ultrawide band (UWB)
‐62°C	Stratosphere
>23 db across the channel
0 degree latitude	Position of geostationary satellite at equator
‐0.011nm/°C	Fiber bragg gradient
0.1 dB	Insertion loss of MEMS
0.2 dB	Average in‐channel insertion loss of DVB‐T
0.275 ± 0.015	Numerical aperture of multimode
0.5 dB/km	Maximum attenuation that a fiber will still work
0.5 dB/km	Grit of less than ____ dB/km
1 hop	Fast hop if greater than ________
1.0 samples per second	GPS and GLONASS data rate
1.2 dB	L to X
1.6 Mbps	Home RF data rate
1.88 ‐ 1.90 GHz	DECT
1/10 λ	Pair of conductors to be considered as transmission line
1/2 of the original rate
1/4 λ	High voltage, minimum current, voltage is equal to zero at the center when ____ λ
1/8 spacing
1/m	Unit of Bulk absorption coefficient
10 ‐ 50 kW	Permissible power in kW at night for Class B
10 m	Ultrawide band (UWB) operating at 3.1 to 10.6 GHz in 110 Mbps can operate at what distance?
10 Mbps	DOCSIS maximum data rate
10 times	802.11b range over Bluetooth
10 times less	How many repeater needed for coax to have the same performance fiber optic
10^6 ‐ 10^8	Gain of effective radar receiver
100 kb	JPEG compression of 20:1 ….
100 m	Maximum distance of 10baseT
100 m	Maximum distance of 100baseT
100 Mbps	maximum data rate of CAT 5 UTP cable
100 THz	Past 10 years fiber optics is said to have what theoretical bandwidth
1000baseT	Which Gigabit Ethernet can support data rate up to 1000 Mbps?
100‐200 kHz	Low frequency Loran is modified as standard Loran operating at _______ kHz
100baseT	Generic name for Fast Ethernet standard
10‐15 MHz	Intermediate RFID
10‐300 µm	Successive approximation
105 x 74 mm	ID 2, German ID cards issued prior to the November 2010
10base5	10Mbps
1100‐1280 nm	Cut‐off wavelength of single mode glass optical fiber
1150‐1350 nm	Wavelength with minimum loss
1200 bps	Caller ID can sending rate
1209Hz, 1336Hz, 1477Hz, 1633Hz	In DTMF, the horizontal frequencies are ______.
125 ± 3 µm	Multimode glass optical fiber cladding diameter
125 µm	Cladding diameter of step index
13.56 GHz	Type A and Type B proximity cards
14 GHz	Common uplink frequency of Ku Band
15 kV	Dangerous when voltage increases beyond this value (X‐ray)
150 km	In fiber transmission, using a… source the speed is 1Gbps with the distance of 15 km to ____.
150 m^3/min	…. Peak power of 10kw
155 Mbps	PoS supports minimum data rate of _______
1575.42‐1227.6 MHz	Center frequency of NAVSTAR GPS
1600 GHz	Bandwidth of fiber optic nowadays
1602.15‐1615.5 MHz	Center frequency of GLONASS
18 m	Diameter of horn‐driven paraboloid
1895‐1918 MHz	DECT
19kHz	Carrier of stereophonic signal
2 to 3	CDMA can increase capacity up to _________ by sectorization

Complete List of Communications Engineering Coaching Materials

Communications Engineering Coaching Materials

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