In digital television, what does a coding rate of 3/4 mean?

1. A 25% of the data sent is forward error correction data
2. B Data compression reduces data rate by 3/4
3. C 1/4 of the time interval is used as a guard interval
4. D Three, four-bit words are used to transmit each pixel

How many horizontal lines make up a fast-scan (NTSC) television frame?

1. A 30
2. B 60
3. C 525
4. D 1080

How is an interlaced scanning pattern generated in a fast-scan (NTSC) television system?

1. A By scanning two fields simultaneously
2. B By scanning each field from bottom-to-top
3. C By scanning lines from left-to-right in one field and right-to-left in the next
4. D By scanning odd-numbered lines in one field and even-numbered lines in the next

How is color information sent in analog SSTV?

1. A Color lines are sent sequentially
2. B Color information is sent on a 2.8 kHz subcarrier
3. C Color is sent in a color burst at the end of each line
4. D Color is amplitude modulated on the frequency modulated intensity signal

Which of the following describes the use of vestigial sideband in analog fast-scan TV transmissions?

1. A The vestigial sideband carries the audio information
2. B The vestigial sideband contains chroma information
3. C Vestigial sideband reduces the bandwidth while increasing the fidelity of low frequency video components
4. D Vestigial sideband provides high frequency emphasis to sharpen the picture

What is vestigial sideband modulation?

1. A Amplitude modulation in which one complete sideband and a portion of the other are transmitted
2. B A type of modulation in which one sideband is inverted
3. C Narrow-band FM modulation achieved by filtering one sideband from the audio before frequency modulating the carrier
4. D Spread spectrum modulation achieved by applying FM modulation following single sideband amplitude modulation

Which types of modulation are used for amateur television DVB-T signals?

1. A FM and FSK
2. B QAM and QPSK
3. C AM and OOK
4. D All these choices are correct

What technique allows commercial analog TV receivers to be used for fast-scan TV operations on the 70-centimeter band?

1. A Transmitting on channels shared with cable TV
2. B Using converted satellite TV dishes
3. C Transmitting on the abandoned TV channel 2
4. D Using USB and demodulating the signal with a computer sound card

What kind of receiver can be used to receive and decode SSTV using the Digital Radio Mondiale (DRM) protocol?

1. A CDMA
2. B AREDN
3. C AM
4. D SSB

What aspect of an analog slow-scan television signal encodes the brightness of the picture?

1. A Tone frequency
2. B Tone amplitude
3. C Sync amplitude
4. D Sync frequency

What is the function of the vertical interval signaling (VIS) code sent as part of an SSTV transmission?

1. A To lock the color burst oscillator in color SSTV images
2. B To identify the SSTV mode being used
3. C To provide vertical synchronization
4. D To identify the call sign of the station transmitting

What signals SSTV receiving software to begin a new picture line?

1. A Specific tone frequencies
2. B Elapsed time
3. C Specific tone amplitudes
4. D A two-tone signal