X-Mozilla-Keys:                                                                                 
Perry Casson wrote:

(the pc scope will not be very well calibrated in the Y axis)

The things to watch out for are:

  1. resistance of the connectors and wires (use the same set for
     calibration and measuring)
  2. non-calibrated voltage source (some have temperature sensitivity)
  3. slow-response transducer (I think Jeff Spitzer mentioned this)

better add to this list:
4.Sound Card AGC control is disabled
5.Sound card Mic. Volume control is set to exactly the same setting as
   when you calibrated (win/control panel).

Might be interesting to feed a sawtooth wave into your pc to see how linear
the DAC really is.

Perry Casson

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