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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.   
 
The Tektronix 581 is similar to the [[585]], but with simplified trigger and sweep circuitry.   
 
It was [[introduced in 1959]].
 
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.  There is also a 581A, which
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The vertical signal path of the 581 is the same as that of the 585.   
has [[tunnel diodes|tunnel diode]] triggering. 581A has bandwith 85Mhz instead of 100Mhz, because CRT-production has bad yield. Many CRT provide not reach 100 Mhz.
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It uses the [[T581]] CRT.   
 +
Type 581 scopes with serial numbers up to 510 use an all-tube trigger cicrcuit.
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Starting at serial number 511, the 581 uses [[tunnel diodes|tunnel diode]] triggering.
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A Type 581A was introduced later, and it is specified to have a bandwidth of 85MHz instead of 100MHz.
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The somewhat relaxed bandwidth specification improved CRT production yield which had been a problem when the scope
 +
was specified to 100MHz.
  
 
* [http://w140.com/tek_581_sn1273.pdf Tektronix 581 Manual (PDF)]
 
* [http://w140.com/tek_581_sn1273.pdf Tektronix 581 Manual (PDF)]

Revision as of 10:19, 24 August 2013

The Tektronix 581 is similar to the 585, but with simplified trigger and sweep circuitry. 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.