180-line television system

The „Olympic-Cannon“ television camera at the 1936 Summer Olympics in Berlin, developed by Emil Mechau at Telefunken and operated by Walter Bruch (inventor of the PAL-system.)

180 lines (by modern standards it could be called 169p) is an early electronic television system. It was used in Germany after on March 22, 1935, using telecine transmission of film, intermediate film system, or cameras using the Nipkow disk. Transmissions using cameras based on the iconoscope began on January 15, 1936.

The Berlin Summer Olympic Games were televised, using both fully electronic iconoscope-based cameras and intermediate film cameras, to Berlin and Hamburg in August 1936. Twenty-eight public television rooms were opened for anybody who did not own a television set. After February 1937 this system was replaced by a superior 441-line system.

System	Field frequency	Active picture	Field blanking	No. of broad pulses	Broad pulse width	Line frequency	Front porch	Line sync	Back porch	Active line time	Video/syncs ratio
180 lines	25 Hz	169 lines	11 lines	1 per field	200 µs	4500 Hz	2.2 µs	20.0 µs	2.2 µs	197.8 µs	75/25

External links

• http://www.compulink.co.uk/~rrussell/tccgen/manual/tcgen0.html