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Deflection blanking: Difference between revisions
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Oscilloscopes have two main ways to avoid drawing on the screen between traces. | Oscilloscopes have two main ways to avoid drawing on the screen between traces. | ||
One is to turn off the CRT beam by making the CRT grid negative (e.g., | |||
One is to turn off the CRT beam by making the CRT grid negative (e.g., −150 V) relative to the CRT cathode. | |||
Another way is to leave the CRT beam on, but to deflect it away from the CRT phosphor. | Another way is to leave the CRT beam on, but to deflect it away from the CRT phosphor. | ||
The latter approach is called deflection blanking. | The latter approach is called '''deflection blanking'''. | ||
Deflection blanking is used in several Tektronix instruments, including the [[321]]. | Deflection blanking is used in several Tektronix instruments, including the [[321]]. | ||
[[Category:Circuits and concepts]] | |||