647: Difference between revisions

647 (view source)

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-The Tektronix 647 is a 100MHz scope that is designed to operate in a wide range of temperatures.  It takes two plug-ins, one for vertical, one for horizontal/sweep.  It uses 10-series and 11-series plug-ins.  Is it the only scope to use those?  It is unusual to see only one scope in what appears to be the beginning of a series.  Was it discontinued because of lack of demand?  What replaced it?
+The Tektronix 647A is a 100MHz scope that is designed to operate in a wide range of temperatures.  It takes two plug-ins, one for vertical, one for horizontal/sweep.  It uses 10-series and 11-series plug-ins.  The plug-ins
+resemble those that go in a 560-series scope, like the 3A3 and 3B2 plug-ins, but they are quite different
+are not at all compatible.  The 647A contains vertical and horizontal amplifiers, whereas in the 560-series,
+the plug-ins drive the deflection plates directly.
+Is it the only scope to use those plug-ins?  It is unusual to see only one scope in what appears to be the beginning of a series.  Was it discontinued because of lack of demand?  What replaced it?