560-series scopes: Difference between revisions

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560-series scopes include:
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.


* [[560]]
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).
* [[561]]
* [[564]]
* [[565]]
* [[567]]
* [[568]]


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 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.


560-series mainframes contain no amplifier stages,
In scopes with amplifiers in the mainframe, touching up the gain or sweep cal when  
requiring the plug-ins to directly drive the CRT deflection plates. 
swapping plug-ins can be skipped, as doing so only tunes the accuracy to a small  
While promoted by Tek as having the advantage of
amount of additional precision.  In the 560 series however, this step is required
“not limited by additional circuitry between the plug-in and the deflection plates”,  
to even get crude accuracy, as the raw deflection factor of the CRT has a relatively  
this configuration has a significant disadvantage. 
large range, and the mainframe has no circuitry to normalize it.
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,  
To maintain good phase match over a wide range of frequency,  
Line 26: Line 19:
The faster vertical plug-ins contain the delay line,  
The faster vertical plug-ins contain the delay line,  
which limits the available volume for amplifier circuitry.
which limits the available volume for amplifier circuitry.
==560 series scopes==
<gallery>
Image:Tek 560 1.jpeg    | [[560]]
Image:Tek 561s.jpg      | [[561]]
Image:Tek 564b 1.JPG    | [[564]]
Image:Image needed.jpg  | [[565]]
Image:567 front.jpg      | [[567]] - Sampling scope with digital readout
Image:568 708p front.jpg | [[568]]
</gallery>
==560 series plugins==
<gallery>
Image:Tek 3a1s.jpg        | [[3A1S]] - 25 MHz vertical amplifier
Image:Tek 3a7 1.JPG      | [[3A7]] - differential amplifier
Image:Tek-3a74-front.jpg  | [[3A74]] - four-channel vertical plug-in
Image:3a9 front.jpg      | [[3A9]] - 1 MHz differential amplifier
Image:Tek 3b1s.jpg        | [[3B1S]] - timebase plug-in
Image:Tek 3l5 front.jpg  | [[3L5]] - 1 MHz spectrum analyzer
Image:3s1 front.jpg      | [[3S1]] - dual-trace sampling plug-in
Image:3s3 front.jpg      | [[3S3]] - sampling plug-in
Image:3s7 front.JPG      | [[3S7]] - sampling plug-in
Image:Tek 3s76 front.jpg  | [[3S76]] - dual-trace sampling plug-in
Image:3t7 front.JPG      | [[3T7]] - sapmpling timebase and pulser
</gallery>
[[Category:560 series scopes]]

Revision as of 10:10, 25 June 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 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 plugins

  • 3A1S - 25 MHz vertical amplifier

    3A1S - 25 MHz vertical amplifier

  • 3A7 - differential amplifier

    3A7 - differential amplifier

  • 3A74 - four-channel vertical plug-in

    3A74 - four-channel vertical plug-in

  • 3A9 - 1 MHz differential amplifier

    3A9 - 1 MHz differential amplifier

  • 3B1S - timebase plug-in

    3B1S - timebase plug-in

  • 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

    3S7 - sampling plug-in

  • 3S76 - dual-trace sampling plug-in

    3S76 - dual-trace sampling plug-in

  • 3T7 - sapmpling timebase and pulser

    3T7 - sapmpling timebase and pulser

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