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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 | The 560 series includes the [[560]], [[506]], [[561]], [[564]], [[565]], [[567]], and [[568]]. | ||
These seven oscilloscope mainframes have the following in common: | |||
* They accept [[560-series plug-ins]] (the 567 additionally accepts the [[6R1]] or [[6R1A]] plug-ins) | |||
* They have linear power supplies (exception: the 560 power supply is basically a switch-mode power supply) | |||
* They require the plug-ins to drive the CRT vertical and horizontal deflection plates directly (exception: the 565, which includes built-in trigger, timebase, and horizontal amplifier circuitry) | |||
* They don't use post-deflection acceleration of the CRT beam | |||
* They were introduced between 1961 and 1967 | |||
* They don't contain a vertical [[delay line]] (some plug-ins, e.g., the [[3A6]] have built-in delay lines) | |||
560-series | The 560 series of plug-ins comprises the 2-series models (e.g., the [[2A60]] and [[2B67]], | ||
and the 3-series models (e.g., the [[3A1]] and [[3B3]]). | |||
The only | The 3-series models are later and use more power than the 2-series models. | ||
The 3-series plug-ins consume more power than the power supply in the 560 and 561 can deliver. | |||
The [[560]] and [[561]] are only for use with 2-series plug-ins. | |||
When the 561A replaced the original 561, one of the benefits it brought was a power supply capable of meeting the current demands | |||
of 3-series plug-ins. | |||
The | Having the vertical and horizontal deflection amplifiers in the plug-ins rather than in the mainframe has pros and cons. | ||
Pro: | |||
* Lower cost for an entry-level configuration. No need for expensive high-speed amplifiers anywhere in the system. | |||
* Bandwidth can be upgraded later by adding faster plug-ins. | |||
* Replacing plug-ins has a high likelihood of fixing problems, unless there is a problem in the power supply or CRT. | |||
Con: | |||
* The signal path of the plug-in to mainframe interface is not as well standardized as it is on [[500-series scopes]] or [[7000-series scopes]]. This is primarily due to variability in deflection sensitivity of CRTs. Checking calibration after changing plug-ins is a recommended. | |||
* Since each plug-in contains deflection amplifiers, the plug-ins cost more than a plug-in with equivalent functionality for a mainframe that has built-in deflection amplifiers. The cost of the deflection amplifiers adds up if the customer wants several different plug-ins at the high-speed end of the 560-series range. | |||
<gallery widths="150" heights="180"> | <gallery widths="150" heights="180"> | ||
Tek 560 1.jpeg | '''[[560|560 - Basic mainframe]]''' (1961) | Tek 560 1.jpeg | '''[[560|560 - Basic mainframe]]''' (1961) | ||
Tek 506 331023143159.jpg | '''[[506|506 - 20 MHz mainframe]]''' (?) | |||
Tek 561s.jpg | '''[[561]]''' (1961) | Tek 561s.jpg | '''[[561]]''' (1961) | ||
561a-2.jpg | '''[[561A]]''' (1962) | 561a-2.jpg | '''[[561A]]''' (1962) | ||