3C66: Difference between revisions
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The Tektronix 3C66 Carrier Amplifier is a plug-in [[introduced in 1963]] for | {{Plugin Sidebar 2 | | ||
title=Tektronix 3C66 | | |||
summary=Carrier Amplifier plugin | | |||
image=3c66_front.jpg | | |||
caption=Tektronix 3C66 | | |||
series=[[560-series scopes]] | | |||
introduced=1963 | | |||
discontinued=(?) | | |||
manuals= | |||
* [http://bama.edebris.com/download/tek/3c66/tek%203c66.v6.pdf Tektronix 3C66 Manual (PDF)] | |||
}} | |||
The '''Tektronix 3C66 Carrier Amplifier''' is a plug-in [[introduced in 1963]] for | |||
[[560-series scopes]]. | [[560-series scopes]]. | ||
It is designed to amplify signals from transducers such as strain gauges, whose | It is designed to amplify signals from transducers such as strain gauges, whose | ||
impedance varies based on, for example, mechanical strain. | impedance varies based on, for example, mechanical strain. | ||
These transducers are usually connected in a bridge circuit. | These transducers are usually connected in a bridge circuit. | ||
The 3C66 drives the bridge with a | |||
The 3C66 drives the bridge with a 25 kHz "carrier" signal, | |||
which is modulated by the relative | which is modulated by the relative | ||
impedances of the arms of the bridge. | impedances of the arms of the bridge. | ||
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The 3C66 provides built-in variable impedances for balancing the bridge. Because the | The 3C66 provides built-in variable impedances for balancing the bridge. Because the | ||
carrier is | carrier is 25 kHz, the maximum bandwidth of the measured quantity is 5kHz. This limitation | ||
is due to the settling time of the envelope detector. In addition to the vertical | is due to the settling time of the envelope detector. In addition to the vertical | ||
deflection signal, the 3C66 provides a front panel output of the measured signal. | |||
==Pictures== | |||
<gallery> | <gallery> | ||
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[[Category: | [[Category:560 series plugins]] | ||
Revision as of 13:37, 21 August 2014
Template:Plugin Sidebar 2 The Tektronix 3C66 Carrier Amplifier is a plug-in introduced in 1963 for 560-series scopes.
It is designed to amplify signals from transducers such as strain gauges, whose impedance varies based on, for example, mechanical strain. These transducers are usually connected in a bridge circuit.
The 3C66 drives the bridge with a 25 kHz "carrier" signal, which is modulated by the relative impedances of the arms of the bridge. The resulting signal is amplified and envelope-detected by the 3C66, producing a vertical deflection proportional to the the measured quantity (strain, for example).
The 3C66 provides built-in variable impedances for balancing the bridge. Because the carrier is 25 kHz, the maximum bandwidth of the measured quantity is 5kHz. This limitation is due to the settling time of the envelope detector. In addition to the vertical deflection signal, the 3C66 provides a front panel output of the measured signal.
