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Distributed deflection plates: Difference between revisions
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Distributed deflection plates (view source)
Revision as of 18:43, 11 December 2023
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==Reality== | ==Reality== | ||
A real deflection plate structure is slightly limited by the fact that the last deflection plates may be longer and more widely separated than the others. Furthermore, the characteristic impedance of the deflection plate structure may not be identical to that of the leads going into and out of the CRT. These are usually high impedance lines and difficult to make. | A real deflection plate structure is slightly limited by the fact that the last deflection plates may be longer and more widely separated than the others. Furthermore, the characteristic impedance of the deflection plate structure may not be identical to that of the leads going into and out of the CRT. These are usually high impedance lines and difficult to make. | ||
As a generalization, oscilloscopes with 100MHz or less bandwidth do not have a distributed deflection structure. (The 580 series with a distributed deflection structure and a 100MHz bandwidth is an exception). | |||
[[File:Tek7844-v-b2.jpg|300px|thumb|right|Vertical termination resistor (l) and amplifier (r) in a [[7844]]]] | [[File:Tek7844-v-b2.jpg|300px|thumb|right|Vertical termination resistor (l) and amplifier (r) in a [[7844]]]] | ||