7A21N: Difference between revisions
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image=Tek 7a21n front.jpg| | image=Tek 7a21n front.jpg| | ||
caption=7A21 front panel| | caption=7A21 front panel| | ||
years=? – ?| | years=1971? – ?| | ||
type=Vertical Amplifier| | type=Vertical Amplifier| | ||
series=[[7000-series scopes]]| | series=[[7000-series scopes]]| | ||
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The 7A21N provides direct access to CRT for fast-risetime AC signals on the 500 MHz-class 7900 series scopes, i.e.[[7904]]/[[7904A]], [[R7903]], [[7934]], [[7912AD]](?). Input signals are applied via a pair of [[GR-874]] connectors. | The 7A21N provides direct access to CRT for fast-risetime AC signals on the 500 MHz-class 7900 series scopes, i.e. [[7904]]/[[7904A]], [[R7903]], [[7934]], [[7912AD]](?). Input signals are applied via a pair of [[GR-874]] connectors. | ||
The 7A21N is fully passive and can be wired for single-ended or differential signals internally. It includes two delay lines, two inverting "transformers" and a passive bridge and power divider. There is no trigger pick-off, this would have to be provided externally e.g. through a [[7M11]]. | The 7A21N is fully passive and can be wired for single-ended or differential signals internally. It includes two delay lines, two inverting "transformers" and a passive bridge and power divider. There is no trigger pick-off, this would have to be provided externally e.g. through a [[7M11]]. | ||