454: Difference between revisions
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The 454 is the fastest general-purpose scope that Tektronix made | The 454 is the fastest general-purpose scope that Tektronix made | ||
that did not use proprietary hybrid circuits. | that did not use proprietary hybrid circuits. | ||
The 454 was [[introduced in 1967]]. The 454A was [[introduced in 1971]]. | The 454 was [[introduced in 1967|introduced in March 1967]]. The 454A was [[introduced in 1971]]. | ||
*[http://manoman.sqhill.com/pdf/tek-454.pdf Tektronix 454 Manual (PDF)] | *[http://manoman.sqhill.com/pdf/tek-454.pdf Tektronix 454 Manual (PDF)] | ||
Revision as of 09:03, 22 January 2012
The Tektronix 454 can be seen as an improved 453. The bandwidth is 150MHz, compared to 50MHz for a 453. The 454 uses a CRT with distributed vertical deflection plates. Without distributed deflection plates, a CRT designer is forced to trade off deflection sensitivity for deflection speed. A CRT with low sensitivity requires a vertical amplifier with a large output swing. It is difficult to find transistors that have both large voltage swing and high speed. Most transistors with high Ft values also have quite low collector breakdown voltages. So the most practical solution was to use distributed deflection plates, and that is what Tektronix did. The 454 weighs 29 pounds and consumes about 130 watts. The 454 is the fastest general-purpose scope that Tektronix made that did not use proprietary hybrid circuits. The 454 was introduced in March 1967. The 454A was introduced in 1971.
