Communications Engineering Coaching Materials: Section 4 Module 2

This is the Section 4 Module 2 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 2

2, 4, 6	In OFDM one code word is equal to ____ bits.
2.1 Mbps	Bluetooth v. 2.0 + EDR
2^11‐2^13	Single OFDM symbol
2^128	IPv6 has how many addresses ___
20 ____________	Coarse Wavelength DM (CWDM)
20 degrees	The maximum vertical angle of rhombic antenna use in long distance sky wave for high frequencies.
20 m	In long distance optical fiber installation takes advantage of the use of Erbium Doped Fiber Amplifier (EDFA). EDFA has a maximum distance of ____.
200 m^3/min	…. Peak power of 20kw
200 Mbps	UTP CAT 6
200 x 10^‐6	Cooling 20 kW
20‐50 m	Accuracy of DECCA positioning system
23 hours and 18 minutes	Periodicity of Bluetooth RF characteristics
24 Mbps	Bluetooth V.3 + HS
256 ‐ 400 Mbps	Satellite dish, size of a pizza placed on a roof receive signal at what rate
27 ‐ 36 Mbps	DOCSIS downstream
3 km	Minicells
3.1 ‐ 10.6 GHz	Authorized unlicensed Ultrawide band (UWB)
3.3 dB	In designing antenna, what is the gain of a three‐dipole antenna neglecting the spacing between the elements?
3.41R	Cut ‐ off circular
3.579545 MHz	Exact chroma subcarrier
30 ‐ 60	IF frequency
30 km	Macrocells
30 mins.	Black box overwritten every _______
300 lb.	Lashed aerial cable maximum tensile load na hindi sya masisira
36 kHz	As per Philippine standard, what is the minimum frequency separation in any service area for adjacent AM radio stations?
3‐6 m	Wave antenna is a long wire antenna designed for low frequency, vertically polarized ground wave. It is supported by a single wire ____ above the ground.
4.095 Mbps, 14000 ft. downstream	Not included in the rate/distance of (?) …
400 m	Length of 1000BaseFX without any repeater
400Mbps	The new technology 10Base FX
45 Mbps	T3
450 nm	Critical diameter(?) of 633 nmn wavelengths
48 kHz	Sampling rate for audio of HDTV
480 Mbps	Wireless USB (WUSB) is a short range, high bandwidth wireless radio communication protocol capable of sending on what speed?
480 Mbps	Bluetooth v. 4.0 is able to operate on what speed?
5 times	Range of Home RF to Bluetooth
50 m	OTDR is recommended in the conduction in field measurement on installed fibers with a length of ____ and above.
50 m	Accuracy of TCN
50 nm	Diameter of nanofiber
50/125, 62.5/125, 100/125	Multimode glass optical fiber
500 m	Accuracy of Transit
500 MHz	Ultrawide bandwidth
500‐1000 pF
50‐100 microns	Core diameter of multimode glass optic fiber
50‐860 MHz
52 km	Contour distance of Class B FM
55‐90 miles	E Layer
600 Ω	The maximum characteristic impedance of a transmission line considering all the effects.
6000 ft.
62.5 ± 3 µm	Multimode glass optical fiber core diameter
62.5/125	Historically, most commonly used multimode glass optical fiber
697Hz, 770Hz, 852Hz, 941Hz	In DTMF, the four vertical frequencies are ___
7/125	Single mode glass optical fiber
72 m	Firewire connects 63 peripherals …. _____ m
721 kbps	Bluetooth
800 MHz	DAMPS
800‐1700 nm	Laser lines of GaAs in nanometer
852 and 1336Hz	DTMF no. 8
88‐98%	OMEGA Global range
9 Mbps	ADSL, DMT
900 MHz	AMPS
900 MHz, 2.4 GHz	Active RFID
900 nm(?)	Diameter of the polyester elastomer
9‐10 µm	Typical diameter of single mode glass optical fiber
980 nm	EDFA … _____ laser pump
About 10000	Number of fibers in a 8.9 µm diameter optical fiber
Acoustic Inertance	The amount of power radiated in an area, may "time derivative" sa tanong
Acoustic Radiosity	Sound power radiated by the surface per unit surface area
Acoustic Sink	A device that absorbs the amount of acoustic power and acoustic energy
AEROSAT	Provides Air Traffic Control (ATC), standard set by STC for aircraft to travel above ocean
After 2 seconds of the ringing duration	Caller ID is a feature of a telephone set which allows user to know the number of the caller even before answering the call. Caller ID is sent ____.
AlGaAsP PIN DIODE	PIN diode high responsivity
All of these (48 kHz, 44.1kHz, _______)	Sampling frequency
AMPS	Introduced in mid 1980s and operates in 800 MHz band
ANSI	Institution that developed ASCII
ANSI 3.28	ANSI defines ADCCP
ANSI/IEEE C.95.1‐1991	Protection ….
Application Layer	File transfer, remote access, shared data‐based management and mail services
ATM	Allows direct access to 64kbps of ISDN B‐channel
Audio Mixing	Mixing of audio signals

Complete List of Communications Engineering Coaching Materials

Communications Engineering Coaching Materials

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