560-series scopes: Difference between revisions

Jump to navigation Jump to search
no edit summary
No edit summary
No edit summary
Line 9: Line 9:


These scopes use [[2-series or 3-series vertical plug-ins]] and [[2-series or 3-series horizontal plug-ins]].
These scopes use [[2-series or 3-series vertical plug-ins]] and [[2-series or 3-series horizontal plug-ins]].
560-series mainframes contain no amplifier stages,
requiring the plug-ins to directly drive the CRT deflection plates. 
While promoted by Tek as having the advantage of
“not limited by additional circuitry between the plug-in and the deflection plates”,
this configuration has a significant disadvantage. 
Touching up the gain or sweep cal when swapping plug-ins
in scopes with amplifiers in the mainframe can be skipped,
as doing so only tunes the accuracy to a small amount of additional precision. 
But in the 560 series, this step is required to even get crude accuracy,
as the raw deflection factor of the CRT has a relatively large range,
and the mainframe has no circuitry to normalize it.
To maintain good phase match over a wide range of frequency,
the mainframe does not contain a [[delay line]] in the vertical path. 
The faster vertical plug-ins contain the delay line,
which limits the available volume for amplifier circuitry.

Navigation menu