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{{Plugin Sidebar | | {{Plugin Sidebar | ||
manufacturer=Tektronix |series=560-series scopes |type= 2A61 | | | manufacturer=Tektronix | ||
summary = Differential amplifier | | | series=560-series scopes | ||
image=Tek 2a61 front.jpg| | | type= 2A61 | ||
caption= | | summary = Differential amplifier | ||
designers=Larry Mayhew | | image=Tek 2a61 front.jpg | ||
introduced=1963 | | | caption=Tektronix 2A61 Front | ||
discontinued=(?) | | | designers=Larry Mayhew | ||
manuals= | | introduced=1963 | ||
| discontinued=(?) | |||
| manuals= | |||
* [[Media:070-0328-01.pdf|Tektronix 2A61 Manual]] (PDF) | * [[Media:070-0328-01.pdf|Tektronix 2A61 Manual]] (PDF) | ||
* [http://bama.edebris.com/download/tek/2a61/2a61.djvu Tektronix 2A61 Manual @ BAMA] (DjVu) | * [http://bama.edebris.com/download/tek/2a61/2a61.djvu Tektronix 2A61 Manual @ BAMA] (DjVu) | ||
* [[Media:2a61 1000-1 cal input adapter.pdf|Tektronix 2A61 1000:1 Cal Div/Input Adapter (PDF, needs OCR)]] | * [[Media:2a61 1000-1 cal input adapter.pdf|Tektronix 2A61 1000:1 Cal Div/Input Adapter (PDF, needs OCR)]] | ||
}} | }} | ||
The '''Tektronix 2A61''' is a differential amplifier plug-in for [[560-series scopes]], [[introduced in 1963]]. | The '''Tektronix 2A61''' is a differential amplifier plug-in for the [[560-series scopes | 560 series oscilloscopes]], [[introduced in 1963]]. | ||
{{BeginSpecs}} | |||
{{Spec | Input impedance | 1 MΩ // 100 pF }} | |||
{{Spec | Deflection | 10 μV/div to 20 mV/div in 1−2−5 sequence }} | |||
{{Spec | Bandwidth | Switch selectable:<br>Low Limit: ~0.06 to ~600 Hz<br>High Limit: ~60 Hz to ~0.3 MHz }} | |||
{{Spec | CMRR | 50,000:1 at Frequencies below 10 kHz }} | |||
{{Spec | Common Mode Range | -5 ≤ A-B ≤ 5 V }} | |||
{{Spec | Line Filter | Switchable: at Least 50:1 attenuation }} | |||
{{EndSpecs}} | |||
==Internals== | ==Internals== | ||
The front end consists of a differential amplifier. | The front end consists of a differential amplifier. | ||
Up to serial number 986, the front-end differential amplifier used a pair of [[5842]] tubes biased with a tail current of 10 mA and a plate-to-cathode voltage of about 100 V. | Up to serial number 986, the front-end differential amplifier used a pair of [[5842]] tubes biased with a tail current of 10 mA and a plate-to-cathode voltage of about 100 V. |
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