Great, as if I didn't play with this stuff enough before; now I'm looking at CD/DVD players with a spectrum analyzer!
Anyways, the analyzer at work is .15 to 1000 MHz - not in the audio band, but interesting anyways.
The results are different for each of several models, but similar (Sony, Philips, and Onkyo DVD players). The left channel analog out is hooked to the S.A. input.
While stopped, the S.A. looks has the normal DC point with minimal background noise on out the spectrum. When playing a CD, there are peaks and other noises at least 20 dB above the noise floor (just approximate, not calibrated by any means).
The interesting part is when there is a music playing, the S.A. display doesn't change much over the paused display (the display is showing 100KHz to 700KHz), BUT when a track that has higher frequency tones, the display has spikes everywhere. I'm not sure what this means.
It seems that on an 'ideal' player, there should be no output above the audio band. Will ferrite around the RCA cords minimize this? What does anyone with any practical expereince with this think?
Thanks for the inspiration to try more and new things,
Matt
Anyways, the analyzer at work is .15 to 1000 MHz - not in the audio band, but interesting anyways.
The results are different for each of several models, but similar (Sony, Philips, and Onkyo DVD players). The left channel analog out is hooked to the S.A. input.
While stopped, the S.A. looks has the normal DC point with minimal background noise on out the spectrum. When playing a CD, there are peaks and other noises at least 20 dB above the noise floor (just approximate, not calibrated by any means).
The interesting part is when there is a music playing, the S.A. display doesn't change much over the paused display (the display is showing 100KHz to 700KHz), BUT when a track that has higher frequency tones, the display has spikes everywhere. I'm not sure what this means.
It seems that on an 'ideal' player, there should be no output above the audio band. Will ferrite around the RCA cords minimize this? What does anyone with any practical expereince with this think?
Thanks for the inspiration to try more and new things,
Matt