Tektronix 502A - Page 109

MANUAL CHANGE INFORMATION
At Tektronix, we continually strive to keep up with
latest electronic developments by adding circuit and
component improvements to our instruments as soon
as they are developed and tested.
Sometimes, due to printing and shipping require 
ments, we can't get these changes immediately into
printed manuals. Hence, your manual may contain new
change information on following pages. If it does not,
your manual is correct as printed.