560-series scopes: Difference between revisions

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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).
560-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.
560-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==
==560 series scopes==
<gallery>
<gallery widths="150" heights="180">
File:Tek 560 1.jpeg    | '''[[560|560 - Basic mainframe]]''' (1961)
File:Tek 560 1.jpeg    | '''[[560|560 - Basic mainframe]]''' (1961)
File:Tek 561s.jpg      | '''[[561]]''' (1961)
File:Tek 561s.jpg      | '''[[561]]''' (1961)
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==560 series plugins==
==560 series plugins==
<gallery>
<gallery widths="150" heights="180">
File:Tek 3a1s.jpg        | '''[[3A1S]]''' - 25 MHz vertical amplifier (1961)
File:Tek 3a1s.jpg        | '''[[3A1S]]''' - 25 MHz vertical amplifier (1961)
File:Tek 3a7 1.JPG      | '''[[3A7]]''' - differential amplifier  
File:Tek 3a7 1.JPG      | '''[[3A7]]''' - differential amplifier  

Revision as of 06:54, 18 August 2014

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).

560-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.

560 series scopes

560 series plugins

  • 3A1S - 25 MHz vertical amplifier (1961)

    3A1S - 25 MHz vertical amplifier (1961)

  • 3A7 - differential amplifier

    3A7 - differential amplifier

  • 3A74 - four-channel vertical plug-in (1963)

    3A74 - four-channel vertical plug-in (1963)

  • 3A9 - 1 MHz differential amplifier (1969)

    3A9 - 1 MHz differential amplifier (1969)

  • 3B1S - timebase plug-in (1961)

    3B1S - timebase plug-in (1961)

  • 3L5 - 1 MHz spectrum analyzer

    3L5 - 1 MHz spectrum analyzer

  • 3S1 - dual-trace sampling plug-in

    3S1 - dual-trace sampling plug-in

  • 3S3 - sampling plug-in

    3S3 - sampling plug-in

  • 3S7 - sampling plug-in (1971)

    3S7 - sampling plug-in (1971)

  • 3S76 - dual-trace sampling plug-in

    3S76 - dual-trace sampling plug-in

  • 3T7 - sampling timebase and pulser (1971)

    3T7 - sampling timebase and pulser (1971)

  • 6R1 - digital readout for 567 (1962)

    6R1 - digital readout for 567 (1962)

  • 6R1A - digital readout for 567

    6R1A - digital readout for 567

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