e-review est modules 17-19

8/13/2019 E-Review EST Modules 17-19

1/11

EST Module 17

# Answers Questions

1 1.544 Mbps T-1 carrier service has ___digital bit rate

2 Horn antenna The most widely used microwave antenna is a

3 400 750nm The wavelength of visible light extends from

4 1500 and 2300 Hz In FM fax, the frequency for black and white are ____ respectively

5 Reflectometer Which of the following is used to measure SWR

6 Overmodulation What causes splatter interference

7 Type Acceptance cetification

A certification issued by the NTC for SRRS radio equipment complying to the SRRS technical

standards and specifications, where equipment has already been type approved by the

administration whose certification is acceptable and whose process does not require

laboratory testing

8

the wide dimension is greater than one-

half of the wavelength in free space

Using the TE mode, microwave power can only be transmitted in free rectangular guide

provided

9 0.6 to 0.8 Velocity factor of coaxial cables vary from

10 urban

Refers to the local exchange service area where the telephone density is 1 per 100

inhabitants and shall be based on the telephone density target from the approved National

Telephone Development Plan (NTDP), expressed as main station per 100 persons

11 Estimation

____ theory is deciding between a set of hypotheses when given a collection of imperfect

measurements

12 TPS

What type of connector arrangement where in a costumer may move to another location

and still retain the same telephone number

13 Free space optics

Propagation of electromagnetic waves often called radio-frequency [RF] propagation or

simply radio propagation

14 30The planned European Satellite Navigation System known as Galileo has ___ no. of

constellation satellites

15 Tunnel The most commonly used LNA in satellite transponder is ___ diode

16 Diversity

It suggests that there is more than one transmission path or method of transmission

available a transmitter and a receiver

17 Pulse width The IF bandwidth of a radar receiver is inversely proportional to

18 Color killer

The chrominance processing circuits can be deactivated when monochrome broadcasts are

received by the __

19 I Which of the following is the color video signal with bandwidth of 1.3 MHz?


2/11

20 HF What is the broadcast frequency band used in short-wave broadcasting reception?

21 Thermal agitation a source of internal noise

22 Broadside array

_____ is an antenna array which is highly directional at right angles to the plane of the

array?

23 Distortion and splatter What is the effect if the gain level being too high for signals entering the modulator?24 Discriminator Demodulation of the audio signal is done by the ___

25 5, 200

For class B-1 FM broadcast stations, the maximum ERP allowed is __ kw with an antenna

height limited to __ feet above average terrain

26 750 and 950 nm

Infrared technology is used to implement wireless LANs as well as the wireless interface to

connect laptops and other portable machines to desktop computer equipped with an

infrared transceiver. What wavelength band is used by the typical infrared LANs?

27 V.42

The ITU-T recommendation for error detection and correction for asynchronous

transmission

28 TM mode

A mode that exists in fiber optics when the magnetic field is perpendicular to the direction

of propagation but there is a small component of electric field in this direction

29 349km The perigee of the international space station

30 A-5 A traditional cable TV channel that belongs to FM band

31 Foster-Seely, Quadrature, PLL The three major types of demodulators

32 70Mhz Most common IF carrier frequency

33 Fresnel zone

In microwave communication, what concepts may be used to analyze interference by

obstacles near the path of a radio beam?

34 2.5dB Rayleigh Scaterring Loss at 8020 nm has a typical value of ___

35 1 Mbps The data rate of information transfer of mobile devices using Bluetooth

36 3 How many octaves is the frequency range 1 to 8 Mhz?

37 16

In accordance with existing provision of law and the KBP rules and regulations, all station

shall actively promote the growth and the development of Filipino music by playing ___

every 4 hours

38 single-tube color Precise scanning and linearity are most important in

39 A fully saturated color is mostly white Which of the following is false?

40 Deviation ratio

In an FM-phone signal, what is the term for the maximum deviation from the carrier

frequency divided by the maximum audio modulating frequency?

41 Random noise Snow in a TV picture is a result of

42 6.18microseconds Time to travel one nautical mile


3/11

43 Radio frequency identification tag micro chip that attach of the antenna

44 To provide corona discharge balls that is attach to the antenna wings

45 4 simultaneous receiver 24 Galileo satellite

46 Group 3 PSK or QAM modulation in fax

47 2 minutes time to transmit 81/2 X 11 in fax48 To have high sensitivity and selectivity advantage of heterodynes

49 Radio station construction permit D.O. 88

50 Amateur, paging in UHF or VHF band D.O. 88, DMPST

51 To inform calling from other mobile paging in cellular

52 Maximum distance between repeaters optical fiber

53 Return loss fresnel reflection in optical fiber loss

54 Near the center of vertical reflector where will the loading coil be put

55 292 ohms resistance loss in glass

56 Telemetry NTC allocated frequency, as of November

57 Leaky mode stripping effect58 7.5m maximum bend of a optical fiber

59 Line turn around reverse transmission direction

60 Small rod supports the microphone called a fishing rod

61 Cocktail party when in crowded or noisy place, it is better to use two ears than covering one

62 9,600 word/min translate ACII, 9,600 bit/ sec

63

An instrument in aircraft provides two

separation

ILS system

64 P500,000 spread spectrum fee per 1MHz

65 780-950 nm wavelength of infrared

66 1:1 ratio of dummy67 1000 Hz allotted for rural

68 211.25 channel 11

69 651.25 channel 44

70 500 frequency in ship and coastal

71 Computer telephone integrator provides number of new computer

72 Radar lock steerable parabolic antenna

73 22dB minimum gain of channel 13

74 90cm separation in 2GHz


4/11

75 428 horizontal resolution of broadcasting

76 30Hz spread spectrum increment

77 51.84 sonnet sts-I

78 Cellular digital packet data transfer from laptop to workplace

79 0.0001 picowatts intensity of sound per 1000Hz80 Radio silence during silent period in the IRR, radio transmitter in maritime general calling should observe

81

14, 15 optical fiber range from approximately one times ten raised to __ to one times ten raised to

__

82 Frequency response of the video resolution of the picture color tv

83 Reduced carrier single band emission form of single sideband emission when carrier are suppressed

84 Waveguide three dimension turn to one direction

85 Syncopated asynchronous bit timing

86 178.83 channel 7

87 Active noise control electronic method to oppose unwanted noise

88 Has larger bandwidth and ITU89 Cleave Referred as a break in optical fiber

90 75Mhz Marconi beacon

91 8 Bluetooth can support ___ simultaneously in 10m radius

92 10 minutes Travel time in 5km distance

93 To maintain oscillator frequency Purpose of AFC in FM

94 OMEGA uses low frequency

95 Doppler discriminator as a second detector

96 To establish and maintain link data link layer

97 TDM Multiple sources each converted to a same frequency

98 smart antenna Automatic moving of antenna99 CSMA/CD access method in Ethernet

100 Data link layer The OSI layer that manage traffic on the link

EST Module 18

# Answers Questions

1 An error occurred in transmission What is indicated by blinking in an Ioran system?


5/11

2 250-750 The primary coating of an optical fiber has a core diameter of _____ microns

3 8 - 10m The core diameter of a single-mode fiber optic available in the market

4 Group velocity Velocity that is the speed with which a constant phase is seen to be moving as a group

5 Doppler Reference Navigational System Dead Reckoning (DR) system used by helicopters

6 30 transponders Number of transponders of Philippine Agila II7 Terminal adapter Device used to connect non-ISDN equivalent to ISDN line

8 1.23MHz The bandwidth used by CDMA sytem

9 13 Superband is located above channel ___

10 1.8MHz Chrominance subcarrier frequency

11 54-216MHz Range of VHF transmitters

12 10-4

m Angstrom is equal to __

13 1.25MHz In CATV systems, the visual carrier is located at ___

14 P200

According to NTC 03-03-2005A or the Rules and Regulations on Broadcast Messaging

Service,Telcos with violations will have a penalty of ____per subscriber

15 6 Department Order no.88, of MNTSC requires the supervision of an ECE in the operation andmaintenance of a total of ___ stations or any other type of land stations

16 60,000

cross-link, the distance between two geostationary satellite (note: crosslink not

sure.sorry)

17 520 Satellites that are newly launched have solar cells capable of supplying ___ watts

18 P5 million

According to NTC 03-11-2005 or Registration of VoIP Service Providers and Resellers, Voip

providers shall give as a performance bond, amounting to____

19 105.5MHz The carrier frequency of FM station channel 288

20 half

Camer lens aperture can be made smaller by stopping down the iris to an effective

diameter of about 1/sqrt of 2 reduces light by ____

21

Birefringence sensor A sensor where external stimuli is used, allows to change optical path lengths, and also in

the reinforcement/cancellations of light waves at the photo-detector

22 Broadband transmission A type of transmission that uses the connecting medium as a multi-channel device

23 gateway A device used to connect different LANs to a common network

24 0.01dB to 0.1dB The power loss due to fusion splice

25 cochlea The part of the ear that is auditory and has fluids

26

inversely proportional to the sqrt of change

in density The pitch to density relationship is given by: the change in frequency is ____

27 Kerr cell A sensor wherein the birefringence is directly proportional to the square of electric field


6/11

28 22dB The minimum gain of channel 11 CATV

29 R interlace Interlacing used for pre-ISDN standard for basic rate access for ISDN environment

30 C-band VSAT operates at what band?

31

An aeronautical radionavigational system

that contains two information related tothe runway What is the most appropriate description for an ILS system?

32 Continuous-phase modulation Which is not a hybrid analog and digital modulation technique?

33 Delta modulation A modulation wherein a train of pulses

34 phase What is measured in an OMEGA system?

35 Gravitational pull and inertia For a satellite in orbit, the two parameters must be balanced. These are ___

36 thruster To stabilize a satellite in orbit, this is used

37 White and orange Broadcast station towers are painted __

38 mode The superposition of two TEM wave

39 specular

Mirror-like reflection, a single direction of light when reflected becomes a single outward

reflection, this phenomenon is called

40 plumbonic Camera lens that uses lead oxide

41 Virtual height

What height of an ionized layer is determined from the time interval between the

transmission signal and ionospheric echo at vertical incidence?

42 Flicker A noise that lowers intensity with frequency

43 Glitch An extraneous bit is added to the bit stream by a noise source

44 Bad filter Cause of slow rising white hum bars in the television

45 hamming code

In error correction and detection, a process where additional bits are included in the bit

stream

46 Push message

Any subscribed or unsolicited message sent to a user without his/her consent and is sent by

PTE or CP

47 Absent-user service The user tells all callers that the terminal is unavailable

48 bandstop A type of filter that allows below and above frequencies

49 Synchronizing signal analyzer Not included component

50 gunn diode Which diode is a popular microwave oscillator?

51 Wider bandwidth Advantage of TWT over Klystron

52 permanent magnet For proper operation, a magnetron must be accompanied by a

53 IEEE 802.11 In wireless transmission, it is considered as medium range

54 At the control room console The camera control unit is located____


7/11

55 degaussing coil It is used to demagnetize TV sets

56 around the tube face Degaussing coil is located__

57 Popcorn noise Burst noise is also known as____

58 Range and bearing Pulsed radar sets are used to find___

59 111 Number of windows in an optical fiber that is available now60 63 Firewire can connect together up to ____peripherals

61 50% At max sunspot activity, electrons/cm3

in E layer increases by___

62 Helical An antenna that can receive TEM wave polarized in all direction

63 Low wattage light bulb Least luminous efficiency

64 End effect Shortening effect of an antenna that makes it appear as if it were 5% longer

65 Skin antenna An antenna that is mounted on aircrafts

66 1.76dB What is the theoretical gain of a Hertzian dipole?

67 only negligible effect

If the reflecting surface of a parabolic antenna has accumulated layers of dirt, what is the

effect of this?

68 Exact interlacing When of line scanning is used for scanning odd and even lines

69 shorter focal length

If a mirror cannot be adjusted to view everything, one way to overcome this is by changing

to

70 10-1000W Typical Speech power

71 Aerospace

The industry that includes the design, operation and implementation with regards to space

and air

72 TDMA Multiple access used by DECT

73 White area

The area in which no interference-free primary service is given by a licensed Broadcast

Station

74 SONET Replaces PDH

75 62.6 Standart Noise temperature in Fahrenheit

76 Syncom II First geosynchronous satellite launched in 1963

77 57deg The Angle of I signal(broadcasting-color)

78 20kW Earths base station output power to space

79 on starboard beam What do you call 90deg at nose of ship

80 speed Measured quantity in Doppler

81 198-204 MHz Frequency range of channel 11

82 0.2 Angstrom Core diameter of step index multimode fiber

83 60 Land mobile service beamwidth


8/11

84

P6000 & 6years According to Act 3486, the maximum penalty for a person who commits three offenses

are___

85 30% red 59% Green 11% Blue Luminance(Y) combination

86 3.5795MHz NTSC standard sub-carrier frequency (color TV)

87 4 and 6GHz Scintillation occurs at what frequencies

88 13-17 dB For sound carrier not to overlap with higher visual carrier, it must be attenuated by___

89 waveguide Limits the 3 dimension propagation to only a single direction

90 11 Sunspot occurs every how many years

91 electric field The part of EM wave that affects matter when it comes in contact

92 waveguide It is the propagation by reflection instead of conduction

93 1-5kHz Ear is sensitive at what frequency

94 Non composite video Camera output signal without sync____

95 Frequency allocation

96 4 Number of bits present in 16 combinations

97 Nicad Solar cells are used for satellite power requirements. During eclipse, ____ batteries areused as back-up

98 Terahertz Photonics are used in very large frequencies, mainly in the range of ____

99

Condenser A type of microphone wherein a tiny amplifier is built into it during casting that is called

head amplifier

100

Writing Bar The part of a fax machine, which consists of rectilinear ribs, determines the position of the

scanning lines of record medium

EST Module 19

# Answers Questions1 invert-on-zero One synch bit for every after 7bits

2 802.15 Bluetooth

3 723 kbps Bluetooth throughput

4 spread spectrum Bluetooth uses what multiple access

5 QPSK SPADE uses

6 Manchester Coding Fast Ethernet 10 Mbps uses

7 TD/CDMA Not 3G

8 CDMA2000 1X 3G October 2000


9/11

9 T index IPS Radio and Satellite System Australia

10 contention Try to send at baseband network cable

11 collision Sending at baseband network cable

12 Microsat Satellite 10-100 kg

13 Satellite Anomaly Spacecraft problem14 Satellite Payload Satellite actual user information

15 Huffman Code Commonly used has lesser number of bit than not commonly used

16 nonlinear devices AM uses

17 SSBSC(Single Sideband Suppressed Carrier) ITU designation J

18 EDGE WIFI with broadband data rate

19 2 Mbps Broadband data rate

20 20 80 mA Telephone current

21 90 V, 20 kHz Telephone ring

22 802.11b WIFI

23 Space diversity 2 or more antennas at same frequency24 Polarization Type of diversity same as space diversity with two antennas

25 Diversity Protection Backup for 11 or more

26 Hot-Standby Protection Designated backup for each

27 12.5kHz SRRS planning

28 32.28 Mbps Terrestrial Digital TV

29 650 nm DVD laser diodes wavelength

30 ITU Prime meridian

31 Molniya of Russia Highly elliptical orbit

32 elliptical Vertical and horizontally polarized but unequal magnitudes

33 Word Interleaving T1 interleaving method34 28 kbps E1 uses frame alignment bit rate

35 42.5 % Capture range for 0 deg. Elevation

36 Photodetector Facsimile

37 ILD (Injection Laser Diodes) Fiber optic light source with narrow emission

38 80 8000 Hz Naturalness

39 160 8000 Hz Monoaural

40 throughput Useful information capacity

41 T2 Binary 6 zero coding


10/11

42 Aug. 19, 1997 First Philippine Satellite launched

43 55 to 1 MP2 to HDTV ratio

44 small Microwave repeater angle should be set to

45 Photonics Using fundamentals of light

46 PCS

Plastic cladding, glass core47 All of the above Measuring of band of sound pressure level

48 All of the above Advantages of SSB AM to AM

49

index of refraction of core is greater than

clad The relation of index of refraction of core and clad

50 modulating amplifier Sideband power comes from

51 Class B Class of FM with antenna 500 in height

52 Class C Mobile phones with GPRS and GSM functions but manually interchanged

53 Sample and Hold Circuit Natural Sampling do not use

54 Zeeman Effect Spectral splitting due to strong magnetic fields

55 mode Waveguide, superposition of two planar waves

56 GPS Provides ITU all over the world

57 3GPP 3GSM

58 Interference Voice frequency transmission disadvantage

59 incompatibility with receivers QAM disadvantage

60 link layer Bad frames are detected by

61 Input impedance Parallel resonant LC circuit

62 unavailability parameter Downtime / (downtime + uptime)

63 to detect collisions CSMA / CD

64 C/N Most important Parameter of uWave Systems

65 Heaviside-Kennaly

Reflective upper atmosphere66 harmonic law Square of period is proportional to cube of distance

67 A AM double sideband designation

68 to increase write speed High velocity of rotating video heads

69

frequency is added below and above the

local oscillator which is equal to

intermediate frequency

Image frequency

70 to improve tracking Padders on receivers

71 greater at low frequency Flicker noise


11/11

72 when the signal does not change Granular noise happens

73 forward link Base station/Cell site to mobile unit

74 Articulation test Test for intelligibility

75 articulation efficiency Percent of correct syllables

76 80 % Percentage to be considered in articulation test to be 100 % intelligent

77 AMPS Analog mobile comm. Fastest data rate

78 odd Square wave harmonics

79 45 degrees 8PSK has degrees separation

80 Dxing Hard-to-get stations

81 4 times voltage 100% modulation, RF amp voltage

82 to minimize interference Sound is 0.5 of power compared to picture

83 miles in length VLF antenna is impractical

84 transequatorial Mysterious radio wave propagation that occurs in the equator at minimum sunspot

85

increases with phase deviation, decreases

with modulation frequency

FM modulation index

86 millimetric waves EHF

87 reciprocity principle Antenna parameters interchangeable between antenna and receiver

88 5.9 microseconds Back porch

89 impedance tube matching Measuring absorption coefficient

90 vertical domain Space diversity domain

91 integrate the PM wave before modulation Deriving FM from PM

92 fade margin Considered as loss in transmission systems

93 noise margin The difference between driver and terminator

94 Alfven wave Depends on the direction of magnetic field not on its magnitude

95 one wavelength Near region

96 12 Superframes consist of how many frames

97 32,000nT Magnetic field intensity at equator

98 Supplementary Category of isdn digital service which is additional services

99 via net pulse Transmission planning which is approaching to a zero transmission loss

100 blanking pulse Pulse Blanked out and is invisible in the receiver

e-review est modules 17-19

Documents