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#14
05-25-2019, 08:09 AM
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Some stations got the audio and video via landline. The video was delivered via the A2A system:
https://www.americanradiohistory.com...l-1955-4.o.pdf It was easy to add a second audio channel. But for microwave fed stations, it required an additional subcarrier modulator at the microwave transmitter and an additional demodulator at the microwave receiver. So it cost a little more for them.
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