The document summarizes the design of a radio frequency transmission system for C.N. Tower in Toronto, Canada. The system combines a 2.5kW digital UHF transmitter on channel 66 with a 10kW analog UHF transmitter on channel 52, using the same antenna. Key aspects of the design include using a digital mask filter as a channel combiner, optimizing the transmission line for low VSWR, providing over 60dB of insulation between transmission paths, and allowing future expansion. The system was designed to integrate into the tower's existing equipment layout while meeting power, cooling and regulatory requirements.

1. C.N.Tower, Toronto, ON, Craig Media , Canada Catalin Popescu – 2003

5. RF System design (cont.) RF Flow Diagram-Patching

6. RF System design (cont.) AC distribution diagram

8. Filters-Channel Combiners Data

9. Installation Drawings Overall view-CN Tower CH 52 AND CH 66 EXISTING 44kw, VHF Patching and Combining system

10. Installation Dwg. Cont. LARCAN Perspective view-CN Tower (future expansion) Future TX (S)

11. Installation Dwg. Cont. Side view-CN Tower, (details)

12. Installation Dwg. Cont. Side view and Patching close view