More interesting than looking at the manchester-encoded S/PDIF signal is looking at the I2S signal either before the S/PDIF transmitter chip or after an S/PDIF receiver. I made the web page below a few years ago just after XM released the XMPCR. You can see the I2S data and word clock waveforms on a dual trace scope (sync'ed to wordclock). With a small amount of effort, I found these signals on pins of the XM receiver module inside the XMPCR case. You can also see my "Frankenstein" breadboard with a PLL and S/PDIF transmitter chip. As messy as it was, it was amazing that the 16.9 MHz (384 x FS) PLL would even stay locked!
http://proxy1.fielddiagnostics.com/~tps/i2s/ -- Timothy Stockman ------------------------------------------------------------------------ Timothy Stockman's Profile: http://forums.slimdevices.com/member.php?userid=8867 View this thread: http://forums.slimdevices.com/showthread.php?t=53345 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
