1. Antenna Booster

2. What is antenna booster? A device used to amplify the signal received (by ratio) by the antenna before feeding to the television receiver. A device used to amplify the signal received (by ratio) by the antenna before feeding to the television receiver. A signal protection box that regulates television frequency signal. A signal protection box that regulates television frequency signal.

3. Booster Block Diagram Signal Detector Lo Detector Receiver Input Duplexer Directional coupler Antenna input Re-transmit

4. Detecting Receivers Allow secondary users in licensed bands if they can guarantee that they do not interfere with primary receivers. Allow secondary users in licensed bands if they can guarantee that they do not interfere with primary receivers. Ch.5 Ch.7 Ch.6 Ch.4 Ch.3 Ch.5 Ch.9 Ch. 3,4,5,6,7 shadower

5. Detecting “Passive” Receivers Legacy receivers must be able to function interference free. Legacy receivers must be able to function interference free. All RF receivers leak local oscillator out of antenna. All RF receivers leak local oscillator out of antenna. Solution: Low cost sensors to detect leakage. Solution: Low cost sensors to detect leakage. Reverse LO leakage

6. TV Detector Vans Used since 1920s

7. Cognisensor Optimal to connect sensor directly between receiver and antenna. Optimal to connect sensor directly between receiver and antenna. Increases LO power coupled to sensor, reduces interference. Increases LO power coupled to sensor, reduces interference. Allows sensor to reuse receive antenna for transmission. Allows sensor to reuse receive antenna for transmission. cognisensor Cognisensor, close up Antenna input Receiver Input Directional Coupler LO Detector Transmitter Duplexer CR

11. TV Booster Sample diagram

12. ANATOMY OF AN ANALOG TV SIGNAL example; channel 19 Lower Edge – 500.000 MHz Upper Edge – 506.000 MHz Video Carrier center freq – 501.250 MHz Color Carrier center freq – 504.830 MHz Audio Carrier center freq – 505.750 MHz 0 amplitude

13. ANATOMY OF A DIGITAL TV SIGNAL example; channel 19 Lower Edge – 500.000 MHz Upper Edge – 506.000 MHz Video, Color and Audio Carrier Signals Are Scattered Throughout the Bandwidth at FULL Amplitude 0 amplitude

14. Equal Frequency allocation of UHF TV in the UHF SPECTRUM

15. TV Booster Common Problems No power No power Intermittent signal Intermittent signal Light bars rolling up or down Light bars rolling up or down Foggy pictures Foggy pictures Weak signal Weak signal Pictures color on and off Pictures color on and off Sagging pictures Sagging pictures