Think You’re An RF Guru? Time To Prove It By Taking Our Quiz!

July 30, 2012, by Karl Winkler


Working with wireless systems can be tricky business.

Take a read and see how you stack up against the questions, and be sure to check out our other quizzes as well.

By the way, some of these questions may have more than one correct answer.


1. True or false: UHF has better audio performance than VHF.

2. True or false: there are more than five viable methods of diversity reception.

3. What are the advantages of analog wireless systems?
A. Long range with graceful signal decay
B. Analog designs are well understood
C. Analog sounds “warmer”
D. Rinse and repeat cycle
E. All of the above

4.  What are the advantages of digital wireless systems?
A. Audio can be transmitted without a compandor
B. The signal can be encrypted
C. Digital is “way cool” – I heard this on the 6 o’clock news
D. Digital exhibits greater immunity to low-level interference
E. All of the above

5. What are the most important features of a wireless system?
A. Good sound
B. Reliable operation
C. Ease of use
D. Cool display with lots of lights
E. A great mother-in-law
F. All of the above

6. “Diversity” means:
A. Using two different transmitters and receivers on different frequencies carrying the same signal
B. Using more than one antenna system feeding a receiver to avoid dropouts
C. Using two complete RF receiver sections and either switching between or blending the two outputs
D. Phase switching between two combined antennas used to receive the best signal
E. All of the peoples of the world joining hands and singing “Kumbaya”
F. An old, old wooden ship


7. “Squelch” means:
A. The sound made when stepping on a snail
B. Muting the outputs of a receiver when the audio signal becomes too noisy
C. The amount the carrier is shifted from the assigned center frequency in response to the audio
D. The available audio monitor level

8. “Deviation” in an FM wireless system refers to:
A. Muting the audio of a receiver when the audio signal becomes too noisy
B. The amount the carrier is shifted from the assigned center frequency in response to the audio signal
C. How far from pitch the singer wanders during the song
D. How far apart your antennas have to be before true diversity reception is possible

9. “Deviation” is an important specification because it represents:
A. How “twisted” someone has to be to accept a touring job as monitor engineer
B. The degree of quieting and suppression of interference for good RF signals
C. The minimum distance you should have two wireless channels to avoid interference
D. The minimum tolerance for electronic parts used in wireless equipment

10. The optimum diversity antenna spacing for the absolute longest range is:
A. One-quarter wave
B. One-half wave
C. Three-quarter wave
D. More than a full wave
E. Surf’s up!

11. True or false: 608 MHz to 614 MHz is reserved for radio astronomy.


12. All other things being equal, a 100 mW transmitter when compared to a 50 mW transmitter provides:
A. Half the range
B. Two times the range
C. 40 percent more range
D. Four times the range
E. A tingly fresh feeling

13. True or false: directional antennas are always better.

14. True or false: when a transmitter antenna is touching a person’s body, a substantial amount of RF energy is absorbed.

15. “Yagi” and “Dipole” are:
A. Types of worm-like creatures living in freshwater ponds
B. Types of antenna designs
C. Types of golf swings
D. Two characters from Star Wars
E. None of the above

16. For the best reception:
A. Place antennas close to the transmitters and run long cables to the receivers
B. Place antennas further from the transmitters and run short cables
C. Depends on the inherent RF signal loss of the antenna cables at the frequency of operation
D. Stand on your head and whisper ancient Mayan war chants

17. And, finally, the best wireless system in the world is:
A. The one you have
B. The most expensive one on the market
C. The one your client requests
D. The one that will get the job done with the least hassles
E. The one with big tailfins!

Our thanks to Karl Winkler and the gang at Lectrosonics for providing the quiz!

Thanks for playing. Be sure to let us know how you scored in the comments!

More Fun Quizzes on PSW:
Test Your Knowledge Of Bass & Subwoofers
Take Our “Real World” Stage Monitoring Quiz
Test Your Knowledge Of Power As It Relates To Sound Systems
Quiz To Rate Your Audio Skills, Knowledge & Personality Type

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Think You’re An RF Guru? Time To Prove It By Taking Our Quiz!