Southshore Broadcasting Inc. is now broadcasting test signals on four channels using multiplexing technology, said Tony Vidal, Southshore’s president and CEO. Multiplexing allows broadcasters to transmit multiple digital TV channels and sub-channels over a single, 6 MHz block of spectrum previously used to broadcast a single, analog channel. Southshore’s CFTV station became the first broadcaster in the country to receive CRTC authorization to multiplex signals last August. The company began broadcasting test signals on its CFTV-DT1, CFTV-DT2, CFTV-DT3 AND CFTV-DT4 channels on Oct. 28. “We are very excited to the first television Broadcaster inCanada to utilize the spectrum to this full potential,” Vidal said in an emailed statement to The Wire Report on Tuesday, adding he hopes the company can set a precedent for others to follow.