1. Understanding the Frequency Spectrum Finding Your Place

2. Common Frequency Bands ▪AM radio - 535 kilohertz to 1.7 megahertz

3. Common Frequency Bands ▪AM radio - 535 kilohertz to 1.7 megahertz ▪Short wave radio - 5.9 mhz to 26.1 mhz

4. Common Frequency Bands ▪AM radio - 535 kilohertz to 1.7 megahertz ▪Short wave radio - 5.9 mhz to 26.1 mhz ▪C.B. radio - 26.96 - 27.41 mhz

5. Common Frequency Bands ▪AM radio - 535 kilohertz to 1.7 megahertz ▪Short wave radio - 5.9 mhz to 26.1 mhz ▪C.B. radio - 26.96 - 27.41 mhz ▪Television stations - 54 to 88 mhz - chls 2-6

6. Common Frequency Bands ▪AM radio - 535 kilohertz to 1.7 megahertz ▪Short wave radio - 5.9 mhz to 26.1 mhz ▪C.B. radio - 26.96 - 27.41 mhz ▪Television stations - 54 to 88 mhz - chls 2-6 ▪FM radio - 88 mhz to 108 mhz

7. Common Frequency Bands ▪AM radio - 535 kilohertz to 1.7 megahertz ▪Short wave radio - 5.9 mhz to 26.1 mhz ▪C.B. radio - 26.96 - 27.41 mhz ▪Television stations - 54 to 88 mhz - chls 2-6 ▪FM radio - 88 mhz to 108 mhz ▪Television stations - 174 to 220 mhz (7-13).

8. ▪Every Wireless device has its own Band ▪Garage door openers - 40 mhz ▪Baby monitors: 49 mhz ▪Radio controlled airplanes: Around 72 mhz ▪Cell phones: 824 to 849 megahertz ▪Cordless phones: 900 mhz, ▪Air traffic control: 960 mhz to 1.2 Ghz ▪GPS System: 1.2 – 1.5 Ghz. ▪Cordless Phones: 2.4 Ghz.

9. Interference

10. How are frequencies decided? ▪Generally first come first served

11. How are frequencies decided? ▪Generally first come first served ▪AM Radio was first on the block

12. How are frequencies decided? ▪Generally first come first served ▪AM Radio was first on the block ▪Arrived in 1906 - limited frequencies (low)

13. How are frequencies decided? ▪Generally first come first served ▪AM Radio was first on the block ▪Arrived in 1906 - limited frequencies (low) ▪FM Radio came along before TV.....

14. How are frequencies decided? ▪Generally first come first served ▪AM Radio was first on the block ▪Arrived in 1906 - limited frequencies (low) ▪FM Radio came along before TV..... ▪BUT...TV became popular faster.

15. Signal Reach ▪Short Wave radio can circle the globe.

16. Signal Reach ▪Short Wave radio can circle the globe. ▪Some AM stations can travel great distances ▪Why?

17. Signal Reach ▪Short Wave radio can circle the globe. ▪Some AM stations can travel great distances ▪Why? ▪Part of Atmosphere is called IONOSPHERE.

19. Signal Reach ▪Short Wave radio can circle the globe. ▪Some AM stations can travel great distances ▪Part of Atmosphere is called IONOSPHERE ▪Sun causes atoms to lose electrons and become ions

20. Signal Reach ▪Short Wave radio can circle the globe. ▪Some AM stations can travel great distances ▪Part of Atmosphere is called IONOSPHERE ▪Sun causes atoms to lose electrons and become ions ▪The ionosphere can reflect certain radio waves.

22. Signal Reach ▪Short Wave radio can circle the globe. ▪Some AM stations can travel great distances ▪Part of Atmosphere is called IONOSPHERE ▪Sun causes atoms to lose electrons and become ions ▪The ionosphere can reflect certain radio waves. ▪When the sun disappears….the layer becomes transparent.

23. Assignment Choose 3 Windsor Radio Stations. Identify: - Frequency (ie: 95.9 FM, 1290AM…) - Ownership (ie: CORUS, CHUM…) - Format (Rock, Country, Alternative…) For each Frequency, locate 3 other Radio stations that share the same Frequency. - Research the following: Frequency, Location, Owners, Format

24. Example - The River - Frequency – FM 93.9 Ownership – Bell Media Format – Alternative ____________________________________ Other Stations: 103.9 CISN 103.9 K-Rock Edmonton NewFoundland CORUS Radio ASTRAL Media Country Classic Rock