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- FCC Novice Exam Question Pool. Subelement 2H.
- Signals and Emissions. 2 Question.
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- One (1) question must be from the following:
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-
- 2H 1.1 A
- Which type of emission is an INTERRUPTED CARRIER WAVE?
-
- A. A1A
- B. A3J
- C. F3C
- D. F2B
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- 2H 2.1 B
- What does the term BACKWAVE mean?
-
- A. A radio wave reflected from the Ionosphere
- back to the sending station.
- B. A small amount of RF that a CW transmitter produces
- even when the key is not closed.
- C. Radio waves reflected back down the feed line
- from a mismatched antenna.
- D. The reflected power in a feedline.
-
-
- 2H 2.2 B
- What is a possible cause of BACKWAVE?
-
- A. Low voltage.
- B. Poor neutralization.
- C. Excessive RF drive.
- D. Mismatched antenna.
-
-
- 2H 3.1 B
- What does the term KEY CLICK mean?
-
- A. The mechanical noise caused by a strait key.
- B. An excessively square CW keyed waveform.
- C. An excessively fast CW signal.
- D. The sound of a CW signal being copied
- on an AM receiver.
-
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- 2H 3.2 D
- How can KEY CLICKS be eliminated?
-
- A. By carefully adjusting your antenna matching network.
- B. By increasing power to the maximum allowable level.
- C. By using a power supply with better regulation.
- D. By using a Key Click filter.
-
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- 2H 4.1 C
- What does the term CHIRP mean?
-
- A. A distortion in the receiver audio circuits.
- B. A High-Pitched audio tone transmitted with a CW signal.
- C. A slight shift in oscillator frequency each time
- a CW transmitter is keyed.
- D. A slow change in transmitter frequency as the
- circuit warms up.
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- 2H 4.2 B
- What can be done to a telegraph transmitter
- power supply to avoid CHIRP?
-
- A. Resonate the power supply filters.
- B. Regulate the power supply output voltages.
- C. Use a buffer amplifier between the
- transmitter output and the feed line.
- D. Cause the power supply output to vary
- with the load.
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- 2H 5.1 D
- What is a common cause of SUPERIMPOSED HUM?
-
- A. Using a nonresonant random-wire antenna.
- B. Sympathetic vibrations from a nearby transmitter.
- C. Improper neutralization of the transmitter output stage.
- D. A defective filter capacitor in the power supply.
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- 2H 6.1 A
- 28.160 MHz. is the 4th. harmonic of what fundamental frequency?
-
- A. 7.040 MHz.
- B. 112.64 MHz.
- C. 7.160 MHz.
- D. 1.760 Mhz.
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- 2H 7.1 C
- What problem in a transmitter power amplifier stage
- may cause spurious emissions?
-
- A. Excessively fast keying speed.
- B. Undermodulation.
- C. Improper neutralization.
- D. Tank circuit current dip at resonance.
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- 2H 8.1 B
- What emission designator describes the use of Frequency
- Shift Keying to transmit radioteletype messages.
-
- A. F2D
- B. F1B
- C. J1F
- D. A1B
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- 2H 8.2 A
- What keying method is used to
- transmit F1B Radioteletype messages?
-
- A. Frequency Shift Keying.
- B. On/Off Keying of the radio wave.
- C. Split Baud Keying.
- D. Tuned Output Keying.
-
-
- One (1) question must be from the following:
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- 2H 9.1 C
- What emission designator describes Single Sideband
- Supressed Carrier (SSB) voice transmissions?
-
- A. J2D
- B. A3J
- C. J3E
- D. F3E
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- 2H 9.2 B
- What type of signal is emission J3E?
-
- A. Frequency Modulated Voice.
- B. Single Sideband Supressed Carrier Voice.
- C. Frequency Shifted Keyed RTTY.
- D. Packet Radio.
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- 2H 10.1 C
- What emission designator describes
- Frequency Modulated Voice transmissions.
-
- A. F1B
- B. F2D
- C. F3E
- D. A3F
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- 2H 10.2 A
- What type of signal is emission F3E?
-
- A. Frequency Modulated Voice.
- B. Single Sideband Supressed Carrier Voice.
- C. Frequency Shifted Keyed RTTY.
- D. Packet Radio.
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- 2H 11.1 A
- What may happen to body tissues that
- are exposed to large amounts of RF Energy?
-
- A. The tissue may be damaged because of the heat produced.
- B. The tissue may suddenly be frozen.
- C. The tissue may be immediately
- destroyed because of the Maxwell effect.
- D. The tissue may become less resistant to cosmic radiation.
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- 2H 11.2 C
- What precautions should you take before working near a High Gain
- UHF or Microwave Antenna (such as a Parabolic or Dish Antenna) ?
-
- A. Be certain the antenna is FCC type approved?
- B. Be certain the antenna and
- transmitter are properly grounded.
- C. Be certain the transmitter can not be operated.
- D. Be certain the antenna safety locks are in place.
-
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- 2H 11.3 B
- How should the antenna on a Hand Held Transceiver
- be positioned while you are transmitting?
-
- A. As close to your body as possible, to
- take advantage of the directional effect.
- B. Away from your head and away from others
- standing nearby, to minimize RF exposure.
- C. Close to the ground, since a Hand Held
- Transciever has no ground connection.
- D. As close to a vertical position as
- possible, to minimize Corona Effect.
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- 2H 11.4 B
- Why should you always locate your antennas so that no one
- can come into contact with them while you are transmitting?
-
- A. To prevent damage to the antennas.
- B. To prevent RF burns and excessive exposure to RF Energy.
- C. To comply with FCC regulations concerning antenna height.
- D. To prevent unexpected changes in your Standing Wave Ratio.
-
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- 2H 11.5 D
- What is a good way to prevent RF burns and
- excessive exposure to RF from your antennas?
-
- A. Shield your antenna with a grounded RF screen.
- B. Make sure you use plenty of radial wires
- in your antenna installation.
- C. Use burn proof wire for your antenna feed line.
- D. Always locate your antennas so that no one can
- come in contact with them while you are transmitting.
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- 2H 12.1 C
- What type of interference will you cause if you operate your
- SSB Transmitter with the microphone gain adjusted too high?
-
- A. You may cause digital interference to
- computer equipment in your neighborhood.
- B. You may cause atmospheric interference
- in the air around your antenna.
- C. You may cause splatter interference
- to other stations on nearby frequencies.
- D. You may cause processor interference
- to the microprocessor in your rig.
-
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- 2H 12.2 B
- What may happen if you adjust the microphone gain or
- deviation control on your FM Transmitter too high?
-
- A. You may cause digital interference to
- computer equipment in your neighborhood.
- B. You may cause interference to other stations
- on nearby frequencies.
- C. You may cause atmospheric interference
- in the air around your antenna.
- D. You may cause processor interference
- to the microprocessor in your rig.
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- 2H 12.3 B
- If you are using an excessive amount of
- speech processing with your SSB Transmitter,
- what type of interference are you likely to cause?
-
- A. You may cause digital interference to
- computer equipment in your neighborhood.
- B. You may cause splatter interference
- to other stations on nearby frequencies.
- C. You may cause atmospheric interference
- in the air around your antenna.
- D. You may cause processor interference
- to the microprocessor in your rig.
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- 2H 12.4 B
- If you are operating SSB Voice and another
- operator tells you that you are causing SPLATTER,
- what might be the cause of the interference?
-
- A. Your rig may be switching from
- transmit to receive too quickly.
- B. You may have your microphone gain control set too high.
- C. Your rig may have a defective modulator transistor.
- D. You may have your transmitter
- splatter control set incorrectly.
-
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- 2H 12.5 A
- If you are operating FM Voice and another operator tells
- you that your signal is TOO WIDE and that you are causing
- interference to other stations on nearby frequencies,
- what might be the cause of the interference?
-
- A. You may have your transmitter deviation
- control or microphone gain set too high.
- B. The Spectral Width control on your
- transmitter may be set incorrectly?
- C. Your microphone may be defective.
- D. You may need to use an amplified POWER MICROPHONE.
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- End of Subelement 2H.
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