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1A1: Difference between revisions
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Type 1A1 uses the "ALT SWEEP SLAVE PULSE" signal that is sent by scopes on pin 7 of the plug-in connector. | Type 1A1 uses the "ALT SWEEP SLAVE PULSE" signal that is sent by scopes on pin 7 of the plug-in connector. | ||
In a Type [[547]] mainframe, | In a Type [[547]] mainframe, this signal allows channel 1 to be displayed using the "A" timebase | ||
this signal allows channel 1 to be displayed using the "A" timebase | |||
and channel 2 using the "B" timebase. | and channel 2 using the "B" timebase. | ||
This is useful, for example, to view the IF and AF of a radio receiver at the same time. | This is useful, for example, to view the IF and AF of a radio receiver at the same time. | ||
Even after the front-end transitioned from Nuvistors to FETs, | Even after the front-end transitioned from Nuvistors to FETs, the output amplifier continued to use Nuvistors. | ||
the output amplifier continued to use Nuvistors. | |||
Type 1A1 has an External Trigger output for mainframes prior to the [[547]] that don't support plug-in triggering. | Type 1A1 has an External Trigger output for mainframes prior to the [[547]] that don't support plug-in triggering, and supplies the trigger system on [[500 Series plug-in interface|pins 4/5 of the mainframe interface]]. | ||
Types 1A1 and [[1A2]] were [[introduced in 1964|introduced together in 1964]], | Types 1A1 and [[1A2]] were [[introduced in 1964|introduced together in 1964]], | ||