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7A13: Difference between revisions
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{{Plugin Sidebar | {{Plugin Sidebar | ||
manufacturer=Tektronix | type=7A13 | | |manufacturer=Tektronix | ||
summary=100 MHz Differential Comparator | | |type=7A13 | ||
image=Tek 7a13 front.jpg | | |summary=100 MHz Differential Comparator | ||
caption=7A13 front panel (older version with mechanical voltage display) | | |image=Tek 7a13 front.jpg | ||
introduced=1969 | | |caption=7A13 front panel (older version with mechanical voltage display) | ||
discontinued=1992 | | |introduced=1969 | ||
series=7000-series scopes| | |discontinued=1992 | ||
|series=7000-series scopes | |||
|designers=Bill DeVey | |||
manuals= | manuals= | ||
* [http://bama.edebris.com/download/tek/7a13/tek-7a13_late.pdf Tektronix 7A13 Manual (PDF)] | * [http://bama.edebris.com/download/tek/7a13/tek-7a13_late.pdf Tektronix 7A13 Manual (PDF)] | ||
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* [[Media:TB-9-6625-2132-35.pdf|TB 9-6625-2132-35 Calibration Procedure for AM-6881/U (7A13) and AM-6786/U (7A22)]] (PDF, 2M) | * [[Media:TB-9-6625-2132-35.pdf|TB 9-6625-2132-35 Calibration Procedure for AM-6881/U (7A13) and AM-6786/U (7A22)]] (PDF, 2M) | ||
}} | }} | ||
The '''Tektronix 7A13''' is a "differential comparator" vertical plug-in for [[7000-series scopes]], i.e. a fast differential amplifier with adjustable DC offset. | |||
The '''Tektronix 7A13''' is a "differential comparator" vertical plug-in for [[7000-series scopes]], | |||
i.e. a fast differential amplifier with adjustable DC offset. | |||
It is one of the first 7000 series plugins. | It is one of the first 7000 series plugins. | ||
It was designed by [[Bill DeVey]] and released along with the [[Introduction to the 7000-Series|first 7000-series scopes]] in 1969/1970, | It was designed by [[Bill DeVey]] and released along with the [[Introduction to the 7000-Series|first 7000-series scopes]] in 1969/1970, and was made until the 7000 series was retired in 1992. | ||
and was made until the 7000 series was retired in 1992. | |||
==Operation== | ==Operation== | ||
Older versions display the comparison (offset) voltage through a mechanical dial, | Older versions display the comparison (offset) voltage through a mechanical dial, newer versions (from 1976 on) through an LED panel meter. | ||
newer versions (from 1976 on) through an LED panel meter. | |||
In addition, this voltage is brought out through a front panel connector so it can be measured externally. | In addition, this voltage is brought out through a front panel connector so it can be measured externally. | ||
In differential mode, a ±10 V common mode signal can be present at the inputs without attenuation. | In differential mode, a ±10 V common mode signal can be present at the inputs without attenuation. | ||
Either input can be switched to the comparison voltage, | Either input can be switched to the comparison voltage, which is settable to four digits by a 10-step switch and a 10-turn potentiometer. | ||
which is settable to four digits by a 10-step switch and a 10-turn potentiometer. | |||
In this comparator mode, the offset range is effectively 10,000 divisions. | In this comparator mode, the offset range is effectively 10,000 divisions. | ||
On the 1 mV/Div to 50 mV/Div ranges, the gate resistors can be disabled by an internal switch, | On the 1 mV/Div to 50 mV/Div ranges, the gate resistors can be disabled by an internal switch, raising DC input impedance to "approximately infinite" (as indicated by a front panel lamp). | ||
raising DC input impedance to "approximately infinite" (as indicated by a front panel lamp). | |||
{{BeginSpecs}} | {{BeginSpecs}} | ||