454: Difference between revisions
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image=Tek 454a front.jpg | | image=Tek 454a front.jpg | | ||
caption=Tektronix 454 front | | caption=Tektronix 454 front | | ||
introduced=1967 | | |||
discontinued=(?) | | |||
manuals= | manuals= | ||
*[http://w140.com/mmm/tek-454.pdf Tektronix 454 Manual (PDF)] | *[http://w140.com/mmm/tek-454.pdf Tektronix 454 Manual (PDF)] | ||
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The 454 weighs 29 pounds and consumes about 130 watts. | The 454 weighs 29 pounds and consumes about 130 watts. | ||
The 454 has a | The 454 has a 140 ns [[delay line]] in the signal path after the | ||
input channel switching and before the main vertical amplifier. | input channel switching and before the main vertical amplifier. | ||
There is a phase equalizer after the delay line to mitigate the | There is a phase equalizer after the delay line to mitigate the | ||
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or proprietary integrated circuits. | or proprietary integrated circuits. | ||
With the input sensitivity set to 10mV/div and above, the 454A has a vertical bandwidth of | With the input sensitivity set to 10mV/div and above, the 454A has a vertical bandwidth of 150 MHz. | ||
At | At 5 mV/div it is 100 MHz, and at 2 mV/div it is 50 MHz. | ||
It is possible to cascade the channel-1 and channel-2 input amplifiers to obtain a sensitivity of | It is possible to cascade the channel-1 and channel-2 input amplifiers to obtain a sensitivity of 400 μV/div. | ||
In that configuration, the vertical bandwidth is | In that configuration, the vertical bandwidth is 33 MHz. | ||
The 454 was [[introduced in 1967|introduced in March 1967]]. The 454A was [[introduced in 1971]]. | The 454 was [[introduced in 1967|introduced in March 1967]]. The 454A was [[introduced in 1971]]. |
Revision as of 04:49, 17 August 2014
The Tektronix 454 can be seen as an improved 453.
The bandwidth is 150 MHz, compared to 50 MHz 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 has a 140 ns delay line in the signal path after the input channel switching and before the main vertical amplifier. There is a phase equalizer after the delay line to mitigate the harm done to pulse fidelity by the delay line.
The 454 is the fastest general-purpose Tektronix scope that does not use proprietary hybrid circuits or proprietary integrated circuits.
With the input sensitivity set to 10mV/div and above, the 454A has a vertical bandwidth of 150 MHz. At 5 mV/div it is 100 MHz, and at 2 mV/div it is 50 MHz. It is possible to cascade the channel-1 and channel-2 input amplifiers to obtain a sensitivity of 400 μV/div. In that configuration, the vertical bandwidth is 33 MHz.
The 454 was introduced in March 1967. The 454A was introduced in 1971.
Specifications
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Pictures
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454A Front
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454A Bottom
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454A Vertical amp
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454A Top
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