WorksheetsECE ELECTIVE 1 FINAL EXAM REVIEW
Total questions: 133
Worksheet time: 1hrs 7mins
it is the transmission of radio telephone emissions intended to be received by the general public.
Social media
Broadcasting
To send out in all directions.
Divisions of Broadcasting
Radio & Television Broadcasting
What are the 3 Broadcast Technical Standards?
FCC, NTC, KBP
What is FCC?
What is NTC?
National Technology Communication (NTC)
Neutron Telecommunication Communication (NTC)
Neutral Telecommunication Coefficient (NTC)
National Telecommunication Commission (NTC)
What is KBP?
Kapitasan ng mga Brodkaster sa Pilipinas
Kapisanan ng mga Brodkaster sa Pilipinas
Kapisanan ng mga Brodkaster ng Pilipinas
Kapitasan ng mga Brodkaster ng Pilipinas
It is licensed for aural or sound transmission intended for direct reception by the general public.
FM Broadcasting
AM Broadcasting
PM Broadcasting
FSK Broadcasting
An AM Broadcast Station is operated on a channel in the Medium Frequency Band range of?
531.5 kHz to 1715 kHz
529.5 kHz to 1708.5 kHz
528.5 kHz to 1710.5 kHz
526.5 kHz to 1705 kHz
AM channels are designated by the assigned carrier frequencies starting from _____ to _____.
531 kHz to 1701 kHz
What is the channel bandwidth of AM Broadcasting?
9 kHz
The Separation Between Stations of the AM Broadcasting is?
36 kHz
How many channel does AM broadcasting have?
100 channels
131 channels
99 channels
115 channels
It is the area in which the signal is not subject to objectionable interference or objectionable fading.
Intermittent Service Area
Primary Service Area
Secondary Service Area
Transmission Service Area
It is the area in which the signal is not subject to interference but subject to intermittent variations in intensity.
Secondary Service Area
Intermittent Service Area
Primary Service Area
Transmission Service Area
It is the area in which the signal is subject to some interference and fading.
Secondary Service Area
Transmission Service Area
Intermittent Service Area
Primary Service Area
It is a station employing frequency modulation and intended to be received by the general public.
AM Broadcasting
FM Broadcasting
PM Broadcasting
None of the choices
An FM Broadcast Station is operated on a channel in the FM broadcast band range of?
An FM Broadcast Channel is a band of frequencies _____ wide and designated by its center frequency.
What is the channel bandwidth of FM Broadcasting?
The Separation Between Stations of the FM Broadcasting is?
550 kHz
800 kHz
How many channel does FM broadcasting have?
100
A _____ station shall have an authorized transmitter power not exceeding _____ and limited in antenna height of _____ above average terrain. The minimum transmitter power shall be _____.
class A, 25 kW, 2000 ft, 10 kW
class B, 20 kW, 1500 ft, 5 kW
class C, 10 kW, 500 ft, 1 kW
class D, 1 kW, 500 ft, 10 W
Class A stations shall only be allowed in?
Metro Manila and Metro Cebu
Metro Cebu and Metro Davao
Metro Manila and Metro Davao
Metro Manila only
A _____ station shall have an authorized transmitter power not exceeding _____ and limited in antenna height of _____ above average terrain. The minimum transmitter power shall be _____.
class B, 10 kW, 500 ft, 1 kW
class A, 20 kW, 1000 ft, 1 kW
class C, 5 kW, 1500 ft, 1 kW
class D, 1 kW, 500 ft, 10 kW
A _____ station is a non-commercial, community station having an authorized power not exceeding _____.
class C, 1000 watts
class A, 100 watts
class B, 10 watts
class D, 500 watts
A _____ station shall have an authorized transmitter power not exceeding _____.
class D, 10 watts
class A, 10 watts
class B, 10 watts
class C, 10 watts
What is the frequency of DZBR?
531
558
594
630
What is the frequency of DZBB?
666
594
774
630
What is the frequency of DZXL?
594
774
558
630
What is the frequency of DWPM?
630
774
531
558
What is the frequency of DZRH?
558
594
774
666
What is the frequency of DZAS?
774
702
738
666
What is the frequency of DZRB?
702
738
774
810
What is the frequency of DWWW?
702
738
774
810
What is the frequency of DZRJ?
774
810
846
882
What is the frequency of DZRV?
774
810
846
882
What is the frequency of DWIZ?
882
918
954
1062
What is the frequency of DZSR?
846
882
918
954
What is the frequency of DZEM?
954
990
1026
1062
What is the frequency of DZIQ?
954
990
1026
1062
What is the frequency of DZAR?
918
990
1026
1062
What is the frequency of DZEC?
954
990
1026
1062
What is the frequency of DWAD?
1026
1062
1098
1134
What is the frequency of DWDD?
1134
1170
1206
1242
What is the frequency of DZCA?
1062
1098
1134
1170
What is the frequency of DWAN?
1206
1242
1278
1314
What is the frequency of DWBL?
1206
1242
1278
1314
What is the frequency of DZRM?
1242
1278
1314
1350
What is the frequency of DWXI?
1242
1278
1314
1350
What is the frequency of DZXQ?
1350
1386
1422
1458
What is the frequency of DZTV?
1386
1422
1458
1494
What is the frequency of DWBC?
1422
1458
1494
1530
What is the frequency of DZJV?
1422
1458
1494
1530
What is the frequency of DWAR?
1422
1458
1494
1530
What is the frequency of DZME?
1422
1458
1494
1530
What is the frequency of DWFO?
87.5
88.3
89.1
89.9
What is the frequency of DWJM?
87.5
88.3
89.1
89.9
What is the frequency of DWAV?
87.5
88.3
89.1
89.9
What is the frequency of DWTM?
87.5
88.3
89.1
89.9
What is the frequency of DZMB?
90.7
91.5
92.3
93.1
What is the frequency of DWKY?
90.7
91.5
92.3
93.1
What is the frequency of DWFM?
90.7
91.5
92.3
93.1
What is the frequency of DWRX?
90.7
91.5
92.3
93.1
What is the frequency of DWKC?
93.9
94.7
95.5
96.3
What is the frequency of DWLL?
93.9
94.7
95.5
96.3
What is the frequency of DWDM?
93.9
94.7
95.5
96.3
What is the frequency of DWRK?
93.9
94.7
95.5
96.3
What is the frequency of DWLS?
97.1
97.9
98.7
99.5
What is the frequency of DWQZ?
97.1
97.9
98.7
99.5
What is the frequency of DZFE?
97.1
97.9
98.7
99.5
What is the frequency of DWRT?
97.1
97.9
98.7
99.5
What is the frequency of DZRJ?
100.3
101.1
101.9
102.7
What is the frequency of DWYS?
100.3
101.1
101.9
102.7
What is the frequency of DWRR?
100.3
101.1
101.9
102.7
What is the frequency of DWSM?
100.3
101.1
101.9
102.7
What is the frequency of DWOW?
103.5
104.3
105.1
105.9
What is the frequency of DWFT?
103.5
104.3
105.1
105.9
What is the frequency of DWBM?
105.1
105.9
106.7
107.5
What is the frequency of DWLA?
105.1
105.9
106.7
107.5
What is the frequency of DWET?
105.1
105.9
106.7
107.5
What is the frequency of DWNU?
105.1
105.9
106.7
107.5
What is the frequency of DWAU?
107.5 MHz
104.1 MHz
97.1 MHz
666 kHz
What is the frequency of DWGV?
104.1
99.1
95.1
107.5
What is the frequency of DWRW?
104.1
99.1
95.1
107.5
It is the process by which some characteristic of one wave is varied in accordance with another wave.
The superimposing a low-frequency voice information component on a high frequency carrier signal.
Demodulation
Digital Signal Processing
Attenuation
Modulation
The information-bearing signal that causes a variation of some characteristic (amplitude, frequency or phase) of a carrier.
Modulating signal
Demodulating signal
Signal generator
Carrier wave
A higher-frequency signal that suits a particular application.
Noise
Carrier
Modulation
Amplitude
If the information-bearing signal is transmitted directly to?
transmitter
amplifier
antenna
space
What are the Purpose of Modulation?
increase the size of the signal
eliminate all forms of noise
large antennas are required and
signals will interfere with each other
simplify the transmission process
It is a process of modulation wherein the amplitude of the carrier signal is varied in accordance with the amplitude of the modulating signal.
Amplitude Modulation (AM)
Phase Modulation (PM)
Frequency Modulation (FM)
Pulse Width Modulation (PWM)
The three components of Equation of an AM Instantaneous Wave.
upper sideband
lower sideband
phase shift modulation
unmodulated carrier
Modulated stages can be divided into three separate categories.
High-level modulated stages
Medium-level modulated stages
Low-level modulated stages
Grid (gate, base) modulation
What is the FCC Standards for AM Broadcasting?
BW per channel : 10 kHz
Frequency Band : 535 kHz – 1605 kHz
Carrier Frequency Tolerance : ± 20 Hz
Intermediate Frequency : 455 kHz
BW per channel : 30 kHz
Frequency Band : 555 kHz – 1435 kHz
Carrier Frequency Tolerance : ± 25 Hz
Intermediate Frequency : 900 kHz
BW per channel : 2.5 kHz
Frequency Band : 342 kHz – 1832 kHz
Carrier Frequency Tolerance : ± 20 Hz
Intermediate Frequency : 700 kHz
BW per channel : 55 kHz
Frequency Band : 143 kHz – 1266 kHz
Carrier Frequency Tolerance : ± 60 Hz
Intermediate Frequency : 343 kHz
It amplifies the very small signal from the antenna. It has a low-noise characteristics. And “tuned” to accept only the desired carrier and sideband frequencies to avoid interference from other stations and to minimize the received noise.
RF amplifier of AM Receiver
Detector of AM Receiver
Power amplifier of AM Receiver
Speaker of AM Receiver
It is a circuit that detects the intelligence from the radio frequency.
Speaker of a AM Receiver
Power amplifier of a AM Receiver
Detector of a AM Receiver
RF amplifier of a AM Receiver
It provides further amplification to give the signal sufficient power to drive a loudspeaker.
Detector of a AM Receiver
Speaker of a AM Receiver
Power Amplifier of a AM Receiver
RF amplifier of a AM Receiver
A dc level proportional to the received signal’s strength from the detector stage is fed back to the IF amplifier and sometimes to the mixer and/or RF amplifier to allow relatively constant receiver output for widely variable received signals. It is called?
It is a frequency from undesired stations which may be fed to the IF amplifier. These RF signals when mixed with the LO, will produce a component equal to the desired intermediate frequency of 455 kHz. The difference between the LO oscillator frequency and an undesired frequency that is twice the desired one will be equal to the IF value of 455 kHz.
Superheterodyne receiver
RF Amplifier
Image Frequency
AM Receiver
The ability of the receiver to amplify weak signals.
Impedance
Sensitivity
Selectivity
Fidelity
the ability of the receiver to receive the desired signal and reject all others
Amplifier
Fidelity
Sensitivity
Selectivity
the ability of the receiver to faithfully reproduce the information.
Selectivity
Sensitivity
Fidelity
Superheterodyne
It may or may not be in an AM receiver, can improve image frequency rejection, provide more gain, better selectivity and it has low noise characteristics.
IF Amplifier of a Superheterodyne Receiver
RF Amplifier of a Superheterodyne Receiver
Mixer of a Superheterodyne Receiver
Detector of a Superheterodyne Receiver
A nonlinear device used to mix the AM signal with a sine wave to generate a new set of sum and difference frequencies. It is a process called heterodyning. Its output is an AM signal with a constant carrier frequency regardless of the transmitter’s frequency.
RF Amplifier of a Superheterodyne Receiver
IF Amplifier of a Superheterodyne Receiver
Detector of a Superheterodyne Receiver
Mixer of a Superheterodyne Receiver
It provides RF signal amplification at a fixed frequency, thus allowing a superior selectivity of the superhet receiver.
Mixer of a Superheterodyne Receiver
Detector of a Superheterodyne Receiver
IF Amplifier of a Superheterodyne Receiver
RF Amplifier of a Superheterodyne Receiver
What are the 3 Types of Analog Modulation?
Frequency Modulation (FM)
Pulse Code Modulation (PCM)
Amplitude Modulation (AM)
Phase Modulation (PM)
An AM radio station operating at 630 kHz is permitted to broadcast audio frequencies up to 5 kHz. Calculate the highest upper and lower side frequencies.
640 kHz, 620 kHz
600 kHz, 610 kHz
630 kHz, 630 kHz
635 kHz, 625 kHz
To achieve 95 percent modulation of a carrier of Vc = 40 volts, determine the needed amplitude of the modulating signal.
50 volts
10 volts
20 volts
38 volts
An AM broadcast operates at its maximum allowed total output of 50 kW at 95% modulation. How much of its transmitted power is intelligence (sidebands)?
15.5 kW
45.433 kW
35.167 kW
22.56 kW
The antenna current of an AM transmitter is 12A when only the carrier is sent but increases to 13 A when the carrier is modulated by a single-sine wave. Calculate the percentage modulation. Determine the antenna current when the depth of modulation changes to 0.85.
Percentage Modulation: 26%, Antenna Current at 0.85 modulation: 6A.
Percentage Modulation: 67%, Antenna Current at 0.85 modulation: 20A.
Percentage Modulation:59%, Antenna Current at 0.85 modulation: 14A.
Percentage Modulation: 33%, Antenna Current at 0.85 modulation: 15A.
A transmitter with a 10-kW carrier transmits 11.2 kW when modulated with a single sine wave. If the carrier is simultaneously modulated with another sine wave at 50% modulation, calculate the total transmitted power.
16.25 kW
18.0 kW
12.45 kW
15.5 kW
Determine the image frequency for a standard broadcast band receiver tuned to a station at 620 kHz.
980 Hz
1530 Hz
1250 Hz
720 Hz
The __________ converts sound pressure wave to electrical signals.
These audio voltages are amplified by the __________.
resistor in series
resistor capacitor
bipolar junction transistor
audio amplifier
The amplifier audio is used to control the deviation of the __________.
audio high frequency
frequency controlled oscillator
image audio quality
rca video output
The low power of the frequency modulated carrier is boosted by the __________.
rf amplifier
modulation circuit
frequency divider
signal generator
The aerial antenna is driven by the amplifier and produces an?
sound wave
infrared signal
radio wave
electromagnetic wave
VCO free runs at the?
15 kHz L-R channel
88 MHz RF
10.7 MHz IF
455 kHz IF amplifier
The incoming signal, if unmodulated, locks up with the VCO signal, causing no signal output from the?
RF amplifier
LPF stage
Mixer
FM demodulator
The error voltage from the LPF, which drives the VCO, will be identical to the original modulating signal, hence taken as the?
carrier signal input
feedback signal input
modulating signal output
demodulated output
Philippine standard for AM broadcast channel bandwidth.
9 kHz
Philippine standard for AM broadcast band.
526.5 kHz to 1705 kHz
Pilot subcarrier frequency for stereo FM.
Subcarrier frequency for SCA signal.
Philippine standard for FM broadcast channel bandwidth.
The output of a balanced modulator.
SSB
DSBSC
SSBSC
DSB
Often used to transmit music programming which is usually commercial-free but paid for by subscription of department stores, supermarkets, fast-food chains, and the like.
FCC (Federal Communications Commission)
NTC (National Telecommunications Commision)
SCA (Subsidiary Communications Authorization)
NBA (National Broadcasting Association)
It provides an artificial boost in the high-frequency portion of the modulating signal.
Pre-emphasis Network
De-emphasis Network
IF used in AM radio receivers.
555kHz
200kHz
455kHz
10.7MHz
IF used in FM radio receivers.
108MHz
10.7MHz
455kHz
88MHz
Broadcast time from 12mn to 5am.
Day time
Night time
Experimental period
Graveyard shift
One of the important considerations in the formation of technical standards.
Increasing the number of channels available
The prevention of harmful signal interference
The improvement of satellite communication systems
Ensuring access to free broadcasting for all listeners
It is considered as a Class D radio station
Education station
Community station
Provincial station
Commercial station
