est - coaching 3

[EST COACHING 3] October 2, 2012

1 | Southern Luzon State University

FREQUENCY DATA, NOISE and ACOUSTICS

Strength of sound

LOUDNESS

Sound of energy flux per unit area

SOUND INTENSITY

Sequenc of musical tone.

TEMPO

Reuse factor used if the same frequency are ar from each

HIGH FREQUENCY REUSE

Frequency band of Personal Handiphone System (PHS).

1895-1918

In video, (NTSC) the flicker frequency is the ________, which is the rate …. that is Illuminated.

FIELD FREQUENCY

Frequency range of intermediate RFID

10-15 MHz

DOCSIS (data over cable service interface spec) – compliant cable modem and cable TV infrastructure

supports data rate of ____ downstream

27 – 36 Mbps

The shortest distance measured along the earth’s surface that a sky wave is returned to

Earth.

SKIP DISTANCE

Crosstalk can be attenuated in 40dB and ______ percent modulation.

90%

Type of microphone which uses capacitor.

CONDENSER

What effect do ionospheric storms have in frequency range and working frequency used in

communication?

DECREASE; DECREASE

What frequency band has a sky wave range of 50 – 150 miles?

VHF

What is the typical loss of a diffracted signal by being bent 5 feet on the mountain ridge?

30 – 40 dB



The impeding effect of inertia upon the transmission of sound in a conduit, equal in a tubular conduit (as

an organ pipe) to the mass of the vibrating medium divided by the square of the cross section

ACOUSTIC INERTANCE

What will happen to the pitch if the frequency of the sound increases?

IT WILL INCREASES

Radio frequency allotted to the military for tactical operations

TACTICAL FREQUENCY

Accumulation of additional sounds such as wind, street noise, other voices that contribute to what the

listener hear

AMBIENCE

Factors that affect the atmospheric condition

(1) Geographic location

(2) Position of…

(3)

GEOGRAPHIC HEIGHT FACTOR

Variation due to rotation of the sun in its orbit

27-DAY

Ground wave range in VHF band, with 0.5 kW power or less

0 to 30 miles

Acoustic reflex of human ear is activated at what sound pressure level?

80 to 85 dB

The difference in dB between the loudest level of sound and the softest passage of sound is known as

________.

DYNAMIC RANGE

Stratosphere is the second layer of the earth. It has a constant temperature of ______.

-65˚C

Low frequency loran is a modification of standard loran with bandwidth of approximately ____ increases

in land range and during nighttime.

100-200 kHz

What is considered as an absorber of sound power/sound energy

ACOUSTIC SINK

In frequency hopping CDMA, HF means “fast” if it jumps more than ____ a bit period, and “slow”

otherwise.

ONCE

In acoustics, the sound power absorbed in the surface by the unit surface area



ACOUSTICS RADIOSITY

In acoustics, dimension characterized as hard, shrill, screaming, pointed and opposite of mild, quiet, and

calm.

SHARPNESS

What specification is used in the numeric data of a barcode?

INTERLEAVE 2 OF 5

critical diameter(?) of 633 nm wavelengths

450 nm

Relates the peak power of multiple carrier signals to the average power

CREST

Typical intermediate frequency ___ Mhz

30-60

Advantage of active RFID over passive RFID

1. It will last forever

2. ______

IT IS UNEXPENSIVE

In acoustics, most common used capacitor value in microphone

500 TO 1000 pF

In acoustics, masking that occurs when not occurring simultaneously

TEMPORAL MASKING

An electrical voltage or current strongly appearing in the output

ELECTRICAL NOISE

sound **** and sound masking coexist in the same time domain

SIMULTANEOUS MASKING

COMMUNICATIONS LINKS and DEVICES

(Antenna, Transmission Lines, Microwave)

Ability of the antenna to send or recieve signal over a narrow horizontal directional range.

DIRECTIVITY

Antenna array design used intrabuilding backbone like data center.

This design is suited for “jumper cables” which connect outside plant cables to terminal equipment.

TIGHT BUFFERED DESIGN <di sure un tanong>

Antenna not used in transmitting frequency at 10GHz



ZEPP ANTENNA

The broadside array is one half wavelength to churva and the broadside array is ___ wavelength to

reflector.

1/8

A type of UTP cable also known as STTP

CAT 7

Poorest water cable capabilities

RIBBON CABLE DESIGN

(mahaba to) cause to additional path

FAST FADING

Skin effect refers to what type of loss?

COPPER LOSS

As the length of a “long wire” antenna increased,

THE NUMBER OF LOBES INCREASES

A metal wrapped around the parabolic antenna aperture to eliminate sidelobes interfering nearby

stations is called:

SHROUD

Range of E layer above the earth.

55-90 MILES

What is the wavelength of two conductor wire to consider it as a transmission line.

1/10 LAMBDA

Type of antenna which consist of one half-wave driven dipole, one reflector and one director.

YAGI

Most common unshielded twisted pair (UTP) connector.

RG45

In circular waveguide, the shortest...

3.2r

used in laser

MACH ZEENDHEER INTERFEROMETER

A one-quarter wavelength of coaxial or balanced transmission line of a specific impedance connected

between a load and a source in order to match the impedances is ____.

Q SECTION

RJ stands for



REGISTERED JACK

In flexible endoscope, the bundle of glass fibers with core diameter of 8.9 um consists of how many fiber

optic cables?

ABOUT 10,000

Type of PIN which has notoriously high leakage current

Ge PIN Diode

Primary technology used in fiber manufacturing

CHEMICAL VAPOR DEPOSITION

What is the DWDM that has a disadvantage of small figure of merit

THIM FILM- FILTER BASED DWDM

It refers to the measure of how much the transmitter is reduced of its maximum output power until the

required level is achieved.

OUTPUT BACK-OFF

The following are the factors of radio wave refraction

1. Frequency…

2. Angle…

3.

IONIZATION DENSITY OF THE LAYER

What is the relationship between the group velocity and the velocity of the material in free space

GROUP VELOCITY IS SLOWER

An antenna coupling can be accomplished by any of the ff. means:

1. Multicoupler

2. Coupler

3. ______

TUNER

In fiber optics the in channel insertion loss for DBV - T signal is _____ dB/km

0.2

In comparing twisted/coax cable and fiber optic the max. less repeater needed to have the same

performance.

10 TIMES LESS

The tropospheric scatter microwave uses antennas hyperbolic paraboloid that can have a diameter of as

large as ______ (m o mm not sure)

18

The core diameter of the nanofiber

50 nm



In fiber optic, the interference occurs in the distances of modes...(not sure satanungperoparangganyan.)

MODAL NOISE

"Ground effect" on antennas are caused by

THEREFLECTING RADIO FREQUENCY ON THE GROUND

The type of microwave tube that uses the velocity .......

KLYSTRON

The type of wave also called as H wave

TE WAVE

In electromagnetic deflection, number of lines…�

600, 150

Electronic component defined by insulation in a two-wire line…

CAPACITOR

When the characteristic impedance of the transmission line matches the output impedance of the

transmitter and the impedance of the antenna itself

MAXIMUM POWER TRANSFER WILL TAKE PLACE

The shape of the electromagnetic energy radiated from or received by an antenna

RADIATION PATTERN

What is the desired vertical angle of rhombic antenna?

20˚

Fiber optic cable component is generally composed of ________ cables.

LESS THAN 36

What type of connector is used to connect cable to a network? It uses bayonet lock and is more reliable.

STRAIGHT-TIP (ST) CONNECTOR

What is the color convention for 62.5 micron fiber?

BEIGE

It is a phenomenon caused by any support insulators used at the ends of the wire antenna.

END EFFECT

The central loose-tube design is also referred as _______.

RIBBON DESIGN

Silica waveguide that has a diameter smaller than the transmitted light

NANOFIBER

How is beamwidth of antenna measured?

BETWEEN HALF POWER POINTS



Silicon PIN diode, used as source in fiber optics communications, has a maximum quantum efficiency of

99.5 %

In a circular TEM, shortest wavelength before the next…

2.8r

What is the horizontal range of … a ____ with a gain power of 0.5 to 5 KW

0-50 MILES

What is the maximum bandwidth limit of fiber optics in the past 10 years?

100 THZ

What broadcast cable has the highest attenuation at 400 MHZ?

RG58/U

Hybrid-fiber optic and coaxial cable… (diko sure if bandwidth or frequency�)

50-860 MHZ

What basic type of LED in fiber communication is used if high bandwidth is needed?

EDGE EMITTING DIODE

What is the typical characteristic impedance of _____ including all consideration.

600 OHMS

Not a disadvantage of AWG

HIGH INSERTION LOSS

Fiber optic communication is not reliable because it is easily intercepted.

FALSE

Fiber optic core diameter according to …

9-10 micrometer

A small variable capacitance in parallel with each section of ganged capacitor is called _______.

TRIMMER

For a short antenna,… what must be used to achieve resonance?

LUMPED INDUCTIVE RESISTANCE

Another term for half wave-dipole antenna

HERTZ ANTENNA

Antenna 1 is 5.3dBi. Antenna 2 is 4.5dBd. Which has higher gain?

ANTENNA 2

How many wavelengths long required for each pair of conductors to be considered as transmission line?

1/10 LAMBDA



High temperature sensitivity, has a disadvantage of non-linear power characteristics

SUPERLUMINESCENT DIODE

In rectangular waveguide, what dominant is used before the next mode be possible.

1.1x

Efficient way to transfer electromagnetic energy is by using

WAVEGUIDE

In dominant rectangular waveguide, what is the cut off wavelength?

2X

It is the oldest microwave tube design which is commonly used in radar transmitters where they can

generate peak power levels in the megawatt range.

MAGNETRON

Antennas that transmit an equal amount of energy in the horizontal direction are called

OMNIDIRECTIONAL

Microwave diode . . . dopant, achieve wide bandwidth. . .

InGAaP PIN diode

A small variable capacitance in parallel with each section of ganged capacitor is called

TRIMMER

Perforated waveguide

LEAKY WAVE ANTENNA

In sky wave propagation, which of the following are factors of skip distance?

a. Height and density of the ionosphere

b. Angle of incidence

c. ________________

OPERATING FREQUENCY

In the troposphere, the air temperature decreases as the altitude increases. The rate of decrease is ___

at every 300 m up.

-2.5 0C

What is the standard diameter for the cladding use in single mode?

125 microns

In fiber optics, when the refractive index of the core varies gradually as a function of radial distance

from the fiber center is called___.

GRADED-INDEX FIBER

Low loss region in a fiber cable



1150-1350 nm

Core/cladding diameter for single mode fiber optic

7/125

The cut off wavelength of a single-mode fiber is from __ to __ nm.

1100,1280

Multimode fiber optic has a bandwitdth __ times bigger than that of a cable.

100

Coaxial cables are not used beyond frequencies of about __

6 GHz

Wavelength of waves on waveguides is larger than that of free space.

TRUE

There are _________ primary unshielded twisted pair cables as classified by EIA/TIA 568 standard

7

A basic antenna connected to a transmission line plus one or more additional conductors that are not

connected to the transmission line form a

PARASITIC ANTENNA

An antenna can be matched to a feed line using:

-a shorted stub

-a loading coil

LC NETWORK

It is a microwave device that allows RF energy to pass through in one direction with very little loss, but

absorbs RF power in the opposite direction.

ISOLATOR

Waveguide with one or more septa placed across it to control microwave power transmission

SEPTATE WAVEGUIDE

Core/cladding for multimode graded index for best ???operation

62.5/125

Common Core diameter of multimode mode graded fiber

62.5 ± 3

When the characteristic impedance of the transmission line matches the output impedance of the

transmitter and the impedance of the antenna itself

MAXIMUM POWER TRANSFER WILL TAKE PLACE

Light operation follows ___ which describes the electromagnetic properties of light



MAXWELL’S EQUATION

In fiber communication, which protocol is an addition to Multi-Protocol Label Switching that adapts to

photonic switch to Generalized Multi-Protocol Lamda Switching that advertises the availability of the

optic resources in the network

OPEN SHORTEST PATH FIRST (OSPF) PROTOCOL

Another name for wave antenna

BEVERAGE ANTENNA

What do you call the bunch of optical fibers used in flexible endoscopy?

LEACHED IMAGE BUNCH

Ratio of incident to transmitted radiation through a grid ratio of patient dose with and without grid

BUCKY FACTOR

Basic LED that can operate in 250Hz

SURFACE EMITTING LED

fiber optics is used in medicine significance

ENDOSCOPY

In waveguides, ________ is a pattern of voltage and current variations along a transmission line not

terminated in its characteristic impedance.

STANDING WAVE

antenna array that can be 3 sided or 6 sided

SECTORALIZATION

FUNI is a ___ ATM

SLOW SPEED

MULTIPLEXING

Refers to a form of multiple access where carrier is shared by many users

TDMA Time Division Multiple Access

The combination phase and amplitude modulation, this combination is called

QAM

A constant amplitude angle modulation wherein the modulating signal is a binary signal that varies with

two discrete voltage levels rather than a continuously changing analog waveform

FSK



Sampling of an analog signal using a sample-and-hold circuit such that the sample has the same

amplitude for its whole duration

FLAT-TOPPED SAMPLING

DWDM (Dense wavelength Division Multiplexing) …provides …

DCF

Type of modulation that varies with amplitude

AMPLITUDE MODULATION

What type of coding where there is a lot of detail, but less movement?

FRAME CODING

What modulation technique is used in Bluetooth v2.0 + Enhanced Data Rate (EDR)?

π/4– QPSC

The most commonly used modulation scheme

PCM (PULSE CODE MODULATION)

number of bits in address of IPv6

2^128

Orthogonal Frequency Division Multiplexing (OFDM) is designated as IEEE 802.11b. This statement is ___

NOT TRUE

Designed to send characters of the message with the specified bit rate but without any fixed timing

relationship from one character to the next

ASYNCHRONOUS

The process of combining multiple audio signals into one track is called?

AUDIO MIXING

AM, FM and RADIO BROADCASTING

What is irregular variation at the ionosphere that coincides with bright solar churva and makes

abnormalization at layer D?

SUDDEN IONOSPHERIC DISTURBANCE (SID)

What will happen when frequencies above MUF are refracted

THE SIGNAL WILL OVERSHOOT THE DESIRED LOCATION

What is the pilot subcarrier frequency used in FM stereophonic transmission?

19 kHz

Discover in 1980, optimized for long distance and wide range



62.5/125

The maximum authorized power of 10 KW for _____ commercial FM station.

CLASS B

What is the maximum allowable ERP for channel 7 – 13 in Metro Manila and Metro Cebu?

1MW

Power of Class D in FM broadcasting station

LESS THAN 10 WATTS

Station with 1.5 m antenna height

CLASS A Transmitter that emits energy in the infrared spectrum

INFRARED TRANSMITTER

A balanced modulator that will used in conjunction with a microwave generator, power amplifier, and

band-pass filter, up-converts the IF carrier to an RF carrier and amplifies the RF to the desired output

power.

TRANSMIT MODULATOR

What is the Nyquist sample rate for a voice input of 10kHz?

20kHz

In FM broadcasting, an auxiliary transmitter may be installed in the same location as the main

transmitter provided that its operating power shall not be less than __ percent or never greater than the

authorized power of the main transmitter.

10

TV, CCTV and VIDEO COMPRESSION

(Mahaba to) used in past and future I..

B-PICTURE OR BIDIRECTIONAL…

Standard color TV model by NTSC.

YIQ MODEL

JPEG compression has a ratio of 20:1, it can conver 2MB to ______.

100KB

ATSC stands for __

ADVANCED TELEVISION SYSTEMS COMMITTEE

What is the typical sampling rate used for CD audio recordings?

44.1kHz

“viewer of the future” ; provides multiple channel.



DVB-SI

What primary color model for display technology is used to describe color independent of a given hardware

implementation?

HSV MODEL

Picture quality used in high fidelity.

JPEG

Most commonly used transistor in digital TV transmitter.

MOSFET TRANSISTOR

Power amplifiers that are popular in Digital TV transmitter

CLASS A or/ and CLASS AB

What is an object- based where object can be both natural or synthetic

MPEG 4

In TV, sound is produced through FM with deviation of __.

±25 kHz

The most acceptable term used to describe the characteristics such as ‘crispness’, ‘sharpness’ and image

detail.

PICTURE DEFINITION

It is also known as the optimum viewing ratio and usually expressed in picture height.

OPTIMUM VIEWING DISTANCE

The visual acuity used in television system

1 RECIPROCAL MINUTE

The video coding used when there are lot of movements present.

FIELD CODING

Audio coding system used in Digital Video Broadcast applications

MPEG LAYER II

Digital TV transmitter has an optimal viewing distance of ____ times the picture height.

3.3

What are the object-based video compression standards?

MPEG 4 AND MPEG 7

Horizontal line scanning time of 63.556 us is for ______.

NTSC

What is the bandwidth of PAL-G European TV Standard?

7 MHz



Standard frame-based

MPEG-2

For good performance of camera tube, ____ must be set . . .

SIGNAL CURRENT

Known as “broadcaster’s choice”

MPEG - 2

What determines the final quality of any enhanced tv set?

a. Source Bandwidth

b. Channel Bandwidth

c. ________________

DISPLAY BANDWIDTH

Distortion produced by scanning in a rectilinear manner

KEYSTONE DISTORTION

In DVB-T systems…with 6400 carriers, statistically, the power crest factor is ___ dB.

38

In commercial TV station, the primetime is _____

10 HOURS

What is the exact frequency of the color burst signal?

3.579545

Process of full color display…

COLOR QUANTIZATION

Most important factor in digital TV transmitter

OUTPUT BACK-OFF

hue, saturation and brightness

HSV MODEL

A signaling path provided by a cable television system to deliver to subscriber terminals television

signals that are intended for reception by a television broadcast receiver without the use of an auxiliary

decoding device and which signals are not involved in broadcast transmission path.

CLASS II CABLE TELEVISION CHANNEL

___ is lossless, supports transparency but allow maximum of 256 colors only.

GIF

most popular class that is used in digital TV

CLASS A AND CLASS AB

TELEPHONY and WIRELESS COMMUNICATIONS



Telephone line/cable use to connect different exchange office.

TOLL LINE

Bluetooth data rate __________.

721KBPS

In DTMF, the vertical frequenciesis also known as _____.

LOW GROUP FREQUENCIES

The Public Switched Telephone Network is optimized for the transport of __

VOICE

Bluetooth can support upto __ simultaneous connections in a 10-meter radius without interfering with

each other.

8

In broadband fixed communication which has the shortest distace?

WIRELESS FIBER

Fiber glass optics has a cladding diameter of _________.

165±3 MICROMETER

Transmission loss in fiber glass cable plant (singlemode) is measured in EIA/TIA 525-____.

7

Passive device that split the fiber output to two or more output.

TREE COUPLER

What ADSL has a capacity of 2MHZ use below 8000ft.

ADSL2+

The minimum length of the riff of fiber optics so that it will not reflect

0.5 mm

Transmission from mobile to cental office.

REVERSE LINK

Voltage DC use for battery in the central office.

-48V

EDFA (Erbium-doped fiber amplifier) consists of approximately how many

meter of optical fiber doped with erbium ions?

20

In DTMF, what is the frequency of 8?

852Hz, 1477 Hz

In radiowave propagation, has great electrical conductivity?

OCEAN OR SEAWATER

Microcells covers ____



FEW STREETS

Any transmission system which conveys more than one signal simultaneously can experience this type of

interference due to the reception of portions of a signal from one channel in another channel.

CROSSTALK

Small cluster are preferred because it increases ________ of each cell

THE NUMBER OF RADIOFREQUENCY AVAILABLE

A mobile phenomenon which the cellular pass through buildings

SLOW FADING

Horizontal in DTMF

1209Hz

1336Hz

1477Hz

____

1633 HZ

What is the maximum data rate of Bluetooth 4.0

480 MBPS

The connection between the Base Station and Telephone Central Office

MOBILE SWITCHING CENTER

The four frequency used in verttical DTMF are:

1. 697 Hz

2. 770 Hz

3. 852

4. _______

941 Hz

Intro n mahaba.Typically , ID is sent over after ______ seconds of the ring duration.

2

With dedicated channel or spare channel

HOT- STANDBY

The telephone extension that is not within the premises of the main station

OUTSIDE EXTENSION

A wireless telephone system that provides high quality and low-delay voice and data capabilities but has

small cells

LOW-TIER SYSTEM

Standard cladding diameter in optic fiber

125 micrometer



Data rate of Unshielded Twisted Pair (UTP) Cat6, new cable category

1OO Mbps

Single-mode optical cable has

25 dB/km loss

ADSL, DMT

9 MBPS

fire wire connects 63 peripherals …. _____ m

72

A type of crosstalk where the transmitter receives… at other end.(?)

NEAR END CROSSTALK

Caller ID is transmitted at what rate?

1200 bps

In a cellular telephone system, each cell site contains a ____.

REPEATER

What is the insertion loss of MEMs?

0.1 dB

UWB authorized unlicensed frequency range

3.1 TO 10.6 GHZ

It is a characteristic of being secure where the message is sent to no other than the intended recipient

PRIVACY/CONFIDENTIALITY

In radio wave propagation, what is the conductivity of a large body of fresh water

VERY GOOD

System wherein the input in a transmitter is a collector modulated

HIGH LEVEL MODULATOR

In cellular communications, BSC stands for

BASE STATION CONTROLLER

In cellular system, a minicells can cover up to around ____.

3 KM

A GSM1800 is a digital cellular system, it is introduced in what year?

1994

In keeping telegraph… correct phase relationship

PHASE CORRECTION



T1 and E1 required a repeater every ___ft

6000

has frequency of 800 MHz

AMPS

Core diameter of RG

0.9 mm

What refers to a printer in relay station that provides complete automatic written record of channel

numbers and fixed routing lines associated with each message that is relayed to that particular station?

NUMBER RECORD PRINTER

What is the classification of Bluetooth RF Power of 0.25mW to 2.5mW?

CLASS II

grounding voltage from the central office

-48 V

Series of undesired black and white in facsimile signal…

STUTTER

SATELLITE COMMUNICATIONS

A satellite dish owner has a 3 meter dish desingned for C band (4GHZ) operation. The owner wannts to

use the same dish with feedhorn for Ku band (12GHZ) satellites. What will be the changein frequency?

INCRESES THE GAIN BY 5.94 DB

14 GHZ

In satellite communication, what is the main difference between Iridium and Globalstar?

RELAYING MECHANISM

NAVSTAR center frequency

1575.42-1227.5 MHz

The satellite system “Omega” provides a global coverage of about __

90%

Geostationary satellites are located at ____ with respect to the equator.

00 LATITUDE

Eccentricity of turban orbit (for high latitudes)



0.2684

Number of Ephemerphisparameters

16

When Sudden Ionosphere Disturbances (SID) occurs, which ionosphere layer is affected the most?

Layer D

Broadcast area of transmitter in the community

56 km

highly stable local radio frequency device that is used for up linking and down linking of intermediate

frequency

STALO

A satellite-dish owner has a 3 meter dish designed for C-band (4 GHz) operation. The owner wants to

use the same dish with a new feedhorn, for Ku-band (12 GHz) satellites. What effect is the beamwidth of

the antenna?

DECREASES TO 1/3 OF ITS FORMER VALUE

Quality of a space-link is measured in terms of the ______

G/T RATIO

Satellite system used for flights over oceans

AEROSAT

Data rate GPS and GLONASS

1 SAMPLE/SEC

A satellite dish size of a pizza can receive data rates _____.

256-400 Kbps

What is the accuracy of transit system?

500 m

the following factors affects the skip zone

a)SUNSPOT ACTIVITY

b)ANGLE OF PROPAGATION

c)_____

FREQUENCY

Satellite used to provide ATC(air traffic control) in flights over the ocean

AEROSAT

DIGITAL and DATA COMMUNICATIONS AND NETWORK PROTOCOLS



Generic name for the Fastest Ethernet standard.

100BaseT

Ethernet that can handle 1000Mbps.

1000BaseT

OSI layer use for routing.

NETWORK LAYER

Networ topology wher the worstation or microcomputer is connected directly to the central computer.

STAR TOPOLOGY

A popular lossless data compression algorithm that replaces frequently occurring data strings with

shorter codes

HUFFMAN CODING

Redundancy error checking wher each character has a nuerical value assigned to it and characters in the message

are combine together to produce anerreor checking character.

CHECKSUM

A mode where Core index refraction is not change and the …..cladding is continuous.

SINGLE INDEX MODE

It is an error-correcting code used for correcting transmission errors in synchronous data streams

HAMMING CODE

Data link layer can detect

ERROR AT NODES

Transmission of bits on a medium using ISO OSI is

PHYSICAL

It is an IP network which consists of two or more networks with the same CIDR routing prefix.

SUPERNET

What is the maximum length of IP datagram?

65,535 OCTETS

Most mainframe computers use what type of encoding scheme?

EBCDIC

Digital Subscriber Line (DSL) technology allows repeaterless facilities as far as ____.

12,000 FEET

In cellular communication, CDMA capacity can be increased by a factor of ____ by sector without much

increase in cost.

2-3

The ____ code that is an eight-bit-fixed-length code, invented in 1960 by IBM.

EBCDIC



Advanced Mobile Phone Service (AMPS) operates at what frequency?

800 MHZ

_____ is a highly engaged communicator who uses traditional and electronic media platforms with high

frequency to socially engage individuals and virtual communities.

HYPERCOMMUNICATOR

Longest distance where the information can be transmitted without receiver (CSMA)

400 m

The process of making the information or data incomprehensible or, intentionally and unintentionally

for the purpose of securing the information

GARBLE

Home RF has data rate of _____ Mbps

1.6

PoS has minimum capacity of _____ Mbps

155

DECT has greater percentage capacity of _____ than personal handyphone or (PHS).

30%

The circuit used to demodulate the binary FSK signal

PLL

The key property of OFDM that attracts the terrestrial boadcasting

LONG SYMBOLTRANSMISSION

DECT(Digital Enhanced Cordless Telecommunication) provides _______ kbps and ISDN unlike PHS.

16-60

ADSL (Asynchronous Digital Subscribers Line) upstream rate

16-640 Mbps

Described as the data describing another data

METADATA

When the called party is in the different home network and another caller from one country …

TROMBONE

Wireless USB, operates at 3.1-10.6 GHz, 110 Mbps, at maximum range of

10m

Data link layer (media access control layer) is responsible for

(1) error recovery,

(2) sequencing

(3) FLOW CONTROL (synchronization)



Analog cellular system used in mid-1980 that used 900 MHz band

TACS

Routing Internet Protocol used ____ algorithm.

BELLMAN-FORD-ALGORITHM

Variation of ASDL, accommodates the change in line for better performance

RATE CHANGE DSL

In digital communication, encoding techniques with BPSK and QPSK with moderate range capability

a. Concatenated

b. Block codes

c. ____

SEQUENTIAL CODE

X.75 recommendation standard for Packet Switched Data Network (PSDN) is for ________________.

INTERNATIONAL GATEWAY INTERFACE

The name given for a set of standards for communicating among computers in which the primary

purpose is to serve as a structural guideline for exchanging information between computers,

workstations and networks.

OSI

Macrocells can range up to ____ km.

30

A connector that has many conductors at one end and has a mirrored or reflective mechanism at the

other end

REFLECTIVE STAR COUPLER

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

Layer which transfer file, remote access, shared data-based management and mail service

APPLICATION LAYER

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

What layer in the OSI model that is responsible for process-to-process delivery of the entire message?

Transport Layer

Allows a wide variety of computers to share the same network

TCP/IP

What is the sampling loss at the rate of once per pulse width?



1.2dB

It is defined by the ITU-T as a service that provides transmission channels capable of supporting

transmission rates greater than the primary data rate.

BROADBAND ISDN

Type of digital modulation that uses two or more different output frequencies

FSK

????? collected by OFDM

211 OR 213

???? bytes in each packets

188 BYTES

Unicode is divided in frames, typically a frame format's size ____

65 535

NAVIGATIONAL AIDS

In radar, keyed-oscillator transmitter, _________ is used as power oscillator.

MAGNETRON

In navigation, used for indication of bearing and distance

POLAR-COORDINATE NAVIGATION SYSTEM

Radar nautical mile can be described having a time interval of _____ microseconds.

12.355

In radar system, what is the purpose of introduction of water to the receiver?

TO DECREASE THE DEIONIZATION TIME

In radar system, a detection where none exists, this is due to the ambiguity of data processing is called

____.

FALSE TARGET

… 1% of distance flown

DOPPLER HEADING REFERENCE

The radar intervining signal........ caused by non illuminating the area of radar signals......bastapraxang

skip zone, version. ngalangng radar, caused by hills.

RADAR SHADOW

In doppler frequency......the relationship of transmitted and reference signal is important in order

to_______

TO DETERMINE THE FREQUENCY SHIFT OF THE RECEIVED SIGNAL



ECE LAWS, KBP CODE and NTC MEMORANDUM CIRCULARS

Given by NTSC pursuant to EO 205 to authorize cable TV operation

CERTIFICATE OF AUTHORITY

What executive order transferred back the control and supervision of NTC to the DOTC?

E.O. 454

What executive order which states that radio stations must play at least 4 OPM songs every clock hour?

E.O. 255

FCC standards that provide adequate protection of industry ANSI/IEEE ****95.1-1991

1991

HALL OF FAME

Coined “Artificial Intelligence” in 1956

JOHN MCCARTHY

Who completes the development of first computed CT scanner in 1973

HOUNSFIELD

The person who is responsible… <information capacity>

H. Nyquist

TELL ME WHEN

GSM900 is at what year?

1992

What year was CIDR introduced?

1993

STANDARDS

(ITU and ITU-T And IEEE Recommendations)

It is defined by the ITU-T as service that provide transmission errors when they are received without

requiring a transmission rates greater than the primary rate

BROADBAND ISDN



What NTC MC requires public telecommunications entities to retain the cell data records of voice calls

and similar records for non-voice traffic?

MC No. 04-06-2007

What is the more popular name for the IEEE 802.5 standard?

TOKEN RING

IEEE standard for TV communication system.

802.14

When sid Bluetooth SIG completed Bluetooth 4.0

APRIL 21, 2010

A non-government organization that sets standards that often becomes law either in treaties or natural

standards

ISO

A CCIT recommendation that contains the complete definition of ARQ system

V.41

What protocol directly sends and receives with few error correction

DATAGRAM PROTOCOL

The categories for Unshielded Twisted Pair (UTP) are based on the cable _____ according to EIA.

QUALITY

In telephone system modem standards, what two standards have the same bit rate?

V.29 AND V.32

What is the popular coaxial cable with diameter of 2.26 mm?

RG213

Measurement of insertion loss in single mode or multimode devices is based on

EIA/TIA 526-34

It is a standard designed by ITU to allow telephones in the public telephone

network to talk to computers/terminals connected to the internet.

H.323

What is the standard for Token Ring Bus?

802.5

System test procedure designated for EIA/TIA ____.

526

Data Rate of Bluetooth

72 KBPS



A wireless USB can hold up to ___ devices from the host.

127

What is the color in the standard color convention of a 50 nm fiber?

BLACK

Electronics Industries Association (EIA) developed a standard that classify Unshielded twisted pair cable

into ___ categories.

7

Out of 203 countries in the world, how many countries are members of ISO?

163

ITU-RS-1001-2

Used to measure reflectance

EIA/TIA-455-107

The category of ISO membership where members do not comply with standards but submit the

specification they used

CORRESPONDENT BODIES

ITU has how many countries as members, ___ countries

191

EIA establish a standard that unshielded cable has __ categories

7 CATEGORIES

ANSI standard for microphone calibration

ANSI S1.10

Primary colors in NTSC standard

YIQ MODEL

UNCLASSIFIED

The ultraviolet ray is passing through atmosphere and in ionosphere. .. . (relationship)

INVERSELY PROPORTIONAL

Standard card used in banking system (ATM, credit/debit cards, etc) ; measures 85.6x5.98 mm.

ID-1

Recorder for measuring galvanic skin resistance

ELECTRODERMOGRAPH

Crystalline materials added to fiber materials to have a low loss and long wavelength

SILVER BROMIDE



Highly toxic fumes

BERYLLIUM OXIDE CERAMIC

Related timing issues

DATA STREAMING

ECG recording requires a bandwidth of

0.05-100 HZ

1 foot-candle is equal to how many lux?

9.290 X 10-2

Metal halide compounds, dopant materials and _____ are oxidized to form a white silica powder called

soot

OXYGEN

In digital TV transmitter, DSB-T signal can be characterized by 12 dB crest factor correctly for ___ of the

total time

99.99%

Study of the response of an image receptor to x-rays

SENSITOMETRY

Radiation doses in the range approximately 200 to 1000 rad produce the _____ syndrome

HEMATOLOGIC

In video coding, MPEG II picture type uses what code to compensate and predict motion?

P-PICTURE OR PREDICTIVE PICTURE

Fiber coupler with configuration of M x N, where M is the number of desired inputs and N is the number

of desired outputs

STAR COUPLER

Instrument used for recording heart sounds

PHONOCARDIOGRAPH

Type of corrosion when two dissimilar metals are in contact with each other

ELECTROLYTIC

The state of the art, the highest development, on a device, technique and scientific field

CUTTING EDGE TECHNOLOGY

...through 6GHz with snap-off connection design

MCX

105x74 mm, used in German ID cards



ID-2

sampling rate loss .......

1.2 DB

cutoff wavelength of (graded index?)***

1.61X

Close contact to RF transmission line and antenna can cause RF burns. RF burns is described as ____

degree burn.

THIRD

Vision of Universal Mobile Telecommunications System or UMTS

“COMMUNICATION TO EVERYONE, EVERYWHERE”

Recorder for measuring galvanic skin resistance

ELECTRODERMAGRAPH

It is the study of the response of an image receptor to x-rays.

SENSITOMETRY

What is the generic name for the contactless integrated circuit device use for payment ….

PROXIMITY CARD

Determines the surface measurement of energy absorbs or losses

EARTH'S RELATIVE CONDUCTIVITY

The radiation absorb...... by emission of 2.08x10*8 ion pairs

ROENTGEN

The FCC power spectral density emission limit for UWB emitters operating in the UWB band is _______

-41.3 dBw/Mhz

One code word has _____ bits (di ko sure �)

2, 4, 6

Unit of bulk absorption coefficient

1/m

Guarantee full confidence

AUTHENTICATION

200-1000rad produce _____ syndrome

HEMATOLOGIC

What id format uses 185x80 mm, uses in visas?

ID-3



Measures the color concentration in the substance.

COLORIMETER

Masking... in preceding time.

FORWARD MASKING

___ kilometer away, without amplification.

FEW

Accuracy of TCN

50 meters

………..……………………..<mga nisearch lang ung definition kasi walang tanong>

Contrast sensitivity measures the ability to see details at low contrast levels

CONTRAST SENSITIVITY

A set of characters, usually in a prescribed format, used to express the year, the month, the day of the

month, the hour of the day, the minute of the hour, and the time zone, if different from Coordinated

Universal Time (UTC). The order may vary, for example, "03:15 Aug 16, 2012 (UTC)".

DATE TIME GROUP

In international electronic ticketing, the microprocessor contactless smart card is?

CALYPSO

The acoustic reflex (or stapedius reflex, attenuation reflex, or auditory reflex) is an involuntary muscle

contraction that occurs in the middle ear of mammals in response to high-intensity sound stimuli.

ACOUSTIC REFLEX

Irregular scattered patches of relatively dense ionization that develop seasonally within the E region and

that reflect and scatter radio frequencies up to 150 MHz.

SPORADIC E

EFFECTS

Intermittent excitation of low frequencies seen as successive light flashes

FLICKER EFFECT

est - coaching 3

Documents

flicker frequency

radio frequency

frequency hopping cdma

transmission of sound

c low frequency loran

loudest level of sound

sound pressure level

softest passage of sound