560-series scopes: Difference between revisions

560-series scopes (view source)

Revision as of 06:54, 18 August 2014

752 bytes removed , 18 August 2014

larger thumbnails; introduction abridged (full text in 560 article)

Peter

Bureaucrats, Interface administrators, Suppressors, Administrators

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-The 560 series scopes which were introduced with the [[560]] and [[561]] in 1961 were tube scopes that began to introduce some solid state circuitry.
+The 560 series scopes which were introduced with the [[560]] and [[561]] in 1961 were tube scopes that began to introduce some solid state circuitry.  They use [[2-series or 3-series vertical plug-ins]] and [[2-series or 3-series horizontal plug-ins]] (exception: [[560]] only takes 2-series because of weak power supply).
-They use [[2-series or 3-series vertical plug-ins]] and [[2-series or 3-series horizontal plug-ins]] (exception: [[560]] only takes 2-series because of weak power supply).
+-series mainframes contain neither delay lines nor amplifier stages, requiring the plug-ins to drive the CRT deflection plates directly,
+at the disadvantage of needing to calibrate gain or sweep when swapping plug-ins.
--series mainframes contain no amplifier stages, requiring the plug-ins to drive
-the CRT deflection plates directly.  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 in that when swapping plug-ins,
-gain or sweep have to be calibrated.
-In scopes with amplifiers in the mainframe, touching up the gain or sweep cal when
-swapping plug-ins can be skipped, as doing so only tunes the accuracy to a small
-amount of additional precision.  In the 560 series however, 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.
 ==560 series scopes==
-<gallery>
+<gallery widths="150" heights="180">
 File:Tek 560 1.jpeg     | '''[[560|560 - Basic mainframe]]''' (1961)
 File:Tek 561s.jpg       | '''[[561]]''' (1961)
@@ Line 32: / Line 16: @@
 ==560 series plugins==
-<gallery>
+<gallery widths="150" heights="180">
 File:Tek 3a1s.jpg        | '''[[3A1S]]''' - 25 MHz vertical amplifier (1961)
 File:Tek 3a7 1.JPG       | '''[[3A7]]''' - differential amplifier