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Difference between revisions of "581"

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The Tektronix 581 is similar to the [[585]], but with simplified trigger and sweep circuitry.
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The Tektronix 581 is similar to the [[585]], but with simplified trigger and sweep circuitry.  
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Like all [[580-series_scopes|580-series scopes]], it uses [[580-series_plug-ins|580-series plug-ins]].
 
It was [[introduced in 1959]].
 
It was [[introduced in 1959]].
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The vertical signal path of the 581 is the same as that of the 585.   
 
The vertical signal path of the 581 is the same as that of the 585.   
 
It uses the [[T581]] CRT.   
 
It uses the [[T581]] CRT.   

Revision as of 13:03, 27 April 2014

The Tektronix 581 is similar to the 585, but with simplified trigger and sweep circuitry. Like all 580-series scopes, it uses 580-series plug-ins. It was introduced in 1959.

The vertical signal path of the 581 is the same as that of the 585. It uses the T581 CRT. Type 581 scopes with serial numbers up to 510 use an all-tube trigger cicrcuit. Starting at serial number 511, the 581 uses tunnel diode triggering.

A Type 581A was introduced later, and it is specified to have a bandwidth of 85MHz instead of 100MHz. The somewhat relaxed bandwidth specification improved CRT production yield which had been a problem when the scope was specified to 100MHz.