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(New page: The Tektronix 581 is similar to the 585, but with simplified trigger and sweep circuitry. The vertical signal path of the 581 is the same as that of the 585.) |
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The Tektronix 581 is | {{Oscilloscope Sidebar | ||
The vertical signal path of the 581 is the same as that of the 585. | |manufacturer=Tektronix | ||
|series=580-series scopes | |||
|model=581 | |||
|image=581_old_1.JPG | |||
|caption=Tektronix 581 (early model) | |||
|introduced=1959 | |||
|discontinued=1972 | |||
|summary=100 (95) MHz oscilloscope | |||
|designers=John Gates; | |||
|manuals= | |||
* [[Media:070-170.pdf|Tektronix 581 Manual]] | |||
* [[Media:070-390.pdf|Tektronix 581A Manual]] (OCR) | |||
* [[Media:070-426.pdf|Tektronix 581A Manual 070-426]] needed | |||
<small> | |||
* Factory Calibration Procedure: [[Media:Tek 581a fcp dec 1968.pdf|Dec 1968]] / [[Media:Tek 581a fcp march 1967.pdf|March 1967]] | |||
* [[Media:Service Scope 39 Aug 1966.pdf|580 series gain adjustment procedure, in Service Scope 39, Aug 1966]] | |||
}} | |||
The '''Tektronix 581''' is a 100 MHz tube scope [[introduced in 1959]] as a single time base version of the [[585]]. | |||
Like all [[580-series_scopes|580-series scopes]], it uses [[580-series_plug-ins|580-series plug-ins]]. | |||
The 58x series were the first Tektronix scopes to use [[distributed deflection plates]] and the last to use [[distributed amplifier]]s for vertical deflection. | |||
At 100 MHz (down-rated to 95 MHz in 1962 and 85 MHz for the 581A) with the [[80|Type 80 plug-in]] and up to 85 MHz with the dual-channel [[82|Type 82]], | |||
they were the highest-speed general purpose scopes of Tek's tube scope era (the 1 GHz [[519]] was specialized with no vertical amplifier). | |||
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 circuit. | |||
Starting at serial number 511, the 581 uses [[tunnel diodes|tunnel diode]] triggering. | |||
A Type 581A was introduced in 1963, and it is specified to have a bandwidth of 85 MHz instead of 100 MHz. | |||
The somewhat relaxed bandwidth specification improved CRT production yield which had been a problem when the scope | |||
was specified to 100 MHz. | |||
{{BeginSpecs}} | |||
{{Spec | Rise time | 3.5 ns with [[80 | Type 80]] plugin and [[P80|P80 probe]] }} | |||
{{Spec | Timebase | 50 ns/Div to 2 s/Div, 1−2−5, variable ×2.5, magnifier ×5, single sweep; X input }} | |||
{{Spec | CRT | [[T581]], distributed vertical deflection plates, 10 kV acceleration }} | |||
{{Spec | Outputs | A Sawtooth, A Gate, B Gate, Calibrator (0.2 mV to 100 V<sub>p-p</sub>, 1−2−5) }} | |||
{{EndSpecs}} | |||
==Pictures== | |||
===581=== | |||
<gallery> | |||
581_old_1.JPG | early 581 | |||
581_old_2.JPG | wrinkle and chrome from early 581 | |||
581_triggermods.JPG | TD trigger instead of 6DJ8 trigger | |||
581_selenium.JPG | Selenium rectifier | |||
</gallery> | |||
===581A=== | |||
<gallery> | |||
Tek 581 1.jpg | 581A | |||
Tek 581 2.jpg | | |||
Tek 581 3.jpg | | |||
Tek 581 5.jpg | | |||
</gallery> | |||
===Schematics=== | |||
<gallery> | |||
Tek 581 early trig.png | early model 581 trigger using tubes | |||
Tek 581 late trig.png | late model 581 trigger using tunnel diode | |||
Tek 581 vertical output amp.png | 581 vertical output amp ([[distributed amplifier]]) driving CRT | |||
</gallery> | |||
==Components== | |||
{{Parts|581}} | |||
{{Parts|581A}} | |||
{{Plugins|580-series scopes}} | |||
[[Category:580 series scopes]] | |||