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560-series scopes: Difference between revisions
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* Checking calibration after changing plug-ins is recommended. The signal path of the plug-in to mainframe interface is not as well standardized as it is on [[500-series scopes]] or [[7000-series scopes]]. This is primarily due to variability in deflection sensitivity of CRTs. | * Checking calibration after changing plug-ins is recommended.\ | ||
The signal path of the plug-in to mainframe interface is not as well standardized as it is on [[500-series scopes]] or [[7000-series scopes]]. This is primarily due to variability in deflection sensitivity of CRTs. The 564B manual says:<blockquote> | |||
The accuracy of measurements made with the Type 564B depends on the calibration of the plug-in units used. | |||
Since the plug-in units drive the deflection plated directly, each unit must be adjusted to match the deflection sensitivity of the particular CRT it drives. | |||
Therefore, the gain or sweep timing adjustment must be checked each time a plug-in unit is changed. | |||
On most units, gain or timing calibration is made with a front-panel screwdriver adjustment. | |||
</blockquote> | |||
* Since each plug-in contains deflection amplifiers, 560-series plug-ins cost more than a plug-in with equivalent functionality for a mainframe that has built-in deflection amplifiers. The purchase cost, weight, and maintenance burden of the extra deflection amplifiers adds up, particularly if the customer wants several different plug-ins at the high-speed end of the 560-series range. | * Since each plug-in contains deflection amplifiers, 560-series plug-ins cost more than a plug-in with equivalent functionality for a mainframe that has built-in deflection amplifiers. The purchase cost, weight, and maintenance burden of the extra deflection amplifiers adds up, particularly if the customer wants several different plug-ins at the high-speed end of the 560-series range. | ||