Across
- 1. U.S. regulatory body for radio operations
- 4. Unit for measuring gain or loss in a system
- 8. Frequency modulation, common in voice communications
- 10. Used to remove unwanted frequencies from a signal
- 12. General call to all stations
- 13. Use of radio in critical or disaster situations
- 17. Device that reduces signal strength
- 18. Orbital relay for global communication
- 20. Amplitude modulation, a signal modulation technique
- 21. Unit of electrical resistance
- 28. Increases the power of a signal
- 30. Refers to coordinate system in polar diagrams
- 33. National coordination of power transmission
- 34. Process of varying a signal to transmit data
- 35. Antenna that works on two frequency bands
- 36. Device for transmitting and receiving radio waves
- 39. Segment of the radio spectrum for specific uses
- 41. Wave that is modulated with data for transmission
- 42. How radio waves travel through the atmosphere
- 43. Frequencies used for long-distance radio transmission
- 47. Layer of Earth's atmosphere that reflects HF signals
- 48. Type of signal transmitted by a radio station
- 49. Confirmation of a radio contact
- 50. Method of communication using dots and dashes
- 51. Station that sends a continuous signal for location purposes
- 54. The highest amplitude point in a waveform
- 55. Long-distance communication with other countries
- 56. Type of antenna often used in mobile setups
- 60. Distance a wave travels in one cycle
- 62. Capture incoming radio signals
- 64. Send radio signals
- 65. Combined resistance and reactance in a circuit
- 67. Method to prevent interference between circuits
- 68. Repeated variation of a signal or current
- 70. Opposition to current flow in a conductor
- 71. Converts AC to DC in a power supply
- 72. Unit of frequency
Down
- 1. Number of cycles per second in a signal wave
- 2. Circuit where current flows through all components
- 3. Simple two-element antenna design
- 5. Ultra high frequency range, used for line-of-sight communication
- 6. Required authorization for operating ham radio
- 7. Circuit that generates a continuous wave signal
- 9. Circuit that combines two frequencies
- 11. Device used to capture and process signals
- 14. Scheduled gathering of operators on a frequency
- 15. Device used to send radio signals
- 16. Portable source of electrical energy
- 19. Component that stores energy in an electric field
- 22. Standing Wave Ratio, a measure of antenna efficiency
- 23. Circuit where components share the same voltage
- 24. Electromagnetic waves used in communication
- 25. Basic particle in electricity and current flow
- 26. High frequency range, used for long-distance communication
- 27. Station that assists in forwarding messages
- 29. Earth connection to reduce electrical noise
- 31. Component that stores energy in a magnetic field
- 32. Solar phenomena that affect radio propagation
- 37. Operating with low power output
- 38. Frequency where an antenna naturally vibrates
- 40. Device that converts encoded signals back to original form
- 43. Smooth periodic oscillation in signal waveform
- 44. Unit of power measurement
- 45. Device that prevents overcurrent in circuits
- 46. Very high frequency range, commonly used for local communication
- 49. Operator's location
- 52. Unique identifier for a ham radio operator
- 53. Flow of electric charge
- 55. Ratio of active time to total time in a signal
- 57. Positive or negative orientation in voltage or current
- 58. Balances unbalanced loads in an antenna system
- 59. Station that receives and retransmits signals
- 61. Opposition to current change in a capacitor or inductor
- 63. Strength or intensity of a signal wave
- 66. Cable commonly used for connecting antennas
- 69. Interference from other radio signals