Yamaha TX540 tuner not tuning

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Administrator
Joined 2007
Paid Member
It sure does :)

I count 16 'tips' over 3 divisions which at 50ns per division is a total sweep of 150ns over that portion. Divide one into 'tother (150/16) and we get the time per cycle. Find the reciprocal of that which is 106,666,666.6666MHz and that gives us our local osc frequency.

We know the local osc has to be 94.9MHz PLUS 10.7MHz (the ever constant IF frequency) which is 105.6MHz.

So this is a really really good check on the calibration of the scope and I would say that result was excellent.
So definitely all good.
 

Attachments

  • Annotation 2019-08-06 073845.png
    Annotation 2019-08-06 073845.png
    737.4 KB · Views: 69
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.