November 2007
Intermediate to advanced
736 pages
46h 32m
English
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DEMODULATING THE (L–R) SIGNAL
The carrier with which the sidebands are combined at the receiver must have the desired 38 kHz frequency within very close limits and remain synchronised to prevent distortion when these sidebands are demodulated. The desired synchronisation is provided by the 19 kHz pilot carrier added to the modulation signal. This steady 19 kHz unmodulated signal is demodulated from the main carrier at the receiver and passed through a frequency doubler, whose output at 38 kHz is combined with the (L–R) signal. The output from the double R may be used directly for combining with the sideband, or as in some designs, this output can be used to synchronise a 38 kHz oscillator whose output is in turn used to combine with the sidebands. ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.