On 01/25/2014 09:01 PM, drlegendre . wrote:
  Heh, I may have just answered my own question.
 I clicked the link (above) to Accurite, and from what I garner I was
 essentially correct - there are "generic" discs which might cover many
 mechanisms, but track spacing & count aren't the only relevant parameter.
 Am I getting that right? =) 
Yes, your 'scope test point is essentially the output of the read
amplifier; hence, the term "analog" alignment diskette.
--Chuck