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422: Difference between revisions
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{{Oscilloscope Sidebar | | |||
title=Tektronix 422 | | |||
summary=15 MHz portable dual-trace scope | | |||
image=Tek 422 front.jpg | | |||
caption=Tektronix 422 front | | |||
years=? | | |||
manuals= | |||
* [http://w140.com/tek_422.pdf Tektronix 422 Manual (PDF)] | |||
* [http://w140.com/tek_422_ac_powersupply.pdf Tektronix 422 Manual, AC power supply (PDF)] | |||
* [http://exodus.poly.edu/~kurt/mmm/tek-422.pdf Tektronix 422 Manual with AC/DC Power Supply (PDF)] | |||
* [http://w140.com/tek_422_low_sn.djvu Tektronix 422 Manual (low sn, DjVu)] | |||
* [http://w140.com/tek_422_sn_20000_up.pdf Tektronix 422 Manual for Serial Numbers 20,000 and up (PDF)] | |||
* [http://w140.com/tek_422_product_reference_book.pdf Tektronix 422 Product Reference Book (PDF)] | |||
}} | |||
The Tektronix Type 422 is a 15 MHz portable dual-trace oscilloscope. It was available with | The Tektronix Type 422 is a 15 MHz portable dual-trace oscilloscope. It was available with | ||
an optional battery back for operation without mains power. Early versions use an | an optional battery back for operation without mains power. Early versions use an | ||
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feedback) and low gain for large signals (strong negative feedback). Thus, the signal at the base | feedback) and low gain for large signals (strong negative feedback). Thus, the signal at the base | ||
of Q364 has a limited swing over a wide range of input amplitudes. The collector current of Q364 | of Q364 has a limited swing over a wide range of input amplitudes. The collector current of Q364 | ||
varies between 0 and | varies between 0 and 9 mA. Depending on the position of the trigger slope control, higher collector | ||
current in Q364 either switches D375 from the low-voltage state to the high-voltage state or from the | current in Q364 either switches D375 from the low-voltage state to the high-voltage state or from the | ||
high-voltage state to the low-voltage state. When D375 transitions from the low-voltage state to the | high-voltage state to the low-voltage state. When D375 transitions from the low-voltage state to the | ||
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The 8056 Nuvistor used in the input amplifier of the 422 can be replaced by a [[MPF102]] JFET. | The 8056 Nuvistor used in the input amplifier of the 422 can be replaced by a [[MPF102]] JFET. | ||
==Specifications== | |||
==Pictures== | |||
<gallery> | <gallery> | ||
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File:Wellenkino 422.jpg | File:Wellenkino 422.jpg | ||
</gallery> | </gallery> | ||
[[Category:400 series scopes]] | |||