APPENDIX A – ORIGINAL TRANSMITTER SCHEMATIC
Figure 1. Transmitter Circuitry in Victim Controller (excerpted from Actions Semiconductor, Ltd. [1], which is the TX2C
ATS302T control chip datasheet; the 14-pin chip on the left is the TX2C control chip)
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Appendix A – Original Transmitter Schematic | ECE 445, Study Guides, Projects, Research of Electrical and Electronics Engineering
Material Type: Project; Class: Senior Design Project Lab; Subject: Electrical and Computer Engr; University: University of Illinois - Urbana-Champaign; Term: Fall 2005;
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APPENDIX A – ORIGINAL TRANSMITTER SCHEMATIC
Figure 1. Transmitter Circuitry in Victim Controller (excerpted from Actions Semiconductor, Ltd. [1], which is the TX2C ATS302T control chip datasheet; the 14-pin chip on the left is the TX2C control chip)
APPENDIX B - PICTURES
Figure 2. Oscillator/Active Buffer output when transmitting logic ‘1’; note that the desired frequency component, 49. MHz, is the leftmost peak, and is at or slightly above the -4.8 dBm measurement discussed in Section 3.1.4. The next strongest frequency component is at about 99.72 MHz, or twice that (99.72 MHz is a harmonic introduced by the oscillator transistor), but its strength is only about -20 dBm. Figure 3. Final Amplifier output when transmitting logic ‘1’; note that the desired frequency component, 49.86 MHz, is the leftmost peak, and is at or slightly below the +24 dBm measurement discussed in Section 3.1.4. The next strongest frequency component is at about 149.58 MHz, or three times that (149.58 MHz is a harmonic introduced by the oscillator transistor), but its strength is only slightly more than -10 dBm. Since the gain block and final amplifier are designed to operate at 49. MHz, they will amplify this frequency much more than any other, and thus further widen the power gap between this frequency and its harmonics – a desirable effect!
Figure 5. Larry and Al demonstrating the completed system. Larry (left) is holding the victim controller; the jammer/spoofer is located on the floor.
APPENDIX C – FULL-PAGE SCHEMATICS
Figure 17. Oscillator and Active Buffer Switch
Figure 19. +9 V Regulator
Figure 20. Control Logic
Figure 22. Final Amplifier