On May 13, 1939, to commemorate completion of the Broadcasting
Hall in Uchisaiwai-cho, the first wireless TV signal in Japan
was transmitted from STRLs 100-m tower in Setagaya to the new
Broadcasting Hall, 13 km away. It was operated by the TV standard
in Japan; a 441-scanning line, 25 frames/second, 4.5 MHz video
frequency, and 500 W output signal. Four TV sets installed in
a backup broadcast equipment room on the 7th floor of the Broadcasting
Hall displayed first a test pattern, then the experimental image.
At the STRL TV studio, with two of the iconoscope cameras in use,
STRL employees appeared in front of the cameras, taking turns
saying: Can you see me clearly? Can you see me clearly?
and announcing the stations call sign: NHK Technical
Research Laboratories experimental television station, J2PQ.