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Image:Tek 180A front.jpg | Image:Tek 180A front.jpg | ||
Tek-180a-ocxo schem.png|Oscillator circuit in 180A using [[158-007]] | |||
Tek 180a internal 1.jpg|180A internal | |||
Tek 180a internal 2.jpg|180A internal | |||
Tek 180a internal 3.jpg|180A internal | |||
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[[Category:Pulse generators]] | [[Category:Pulse generators]] | ||
[[Category:Introduced in 1958]] | [[Category:Introduced in 1958]] | ||
Revision as of 13:01, 29 October 2017
The Tektronix 180A was introduced in 1958 and is an all tube time mark generator with an oven-controlled crystal oscillator (OCXO). Time mark generators put out pulses at user-selectable intervals. They are primarily used for calibrating the time-base of oscilloscopes. The 180A divides down the clock signal using synchronized monostable multivibrators. This scheme does not require precision in the time constant of the monostable multivibrators. The only precision component in the 180A is the OCXO (part number 158-007). The manual suggests an interesting procedure for calibrating the OCXO, by attaching a small antenna to deliberately interfere with the national time standard broadcast, and observing the interference with a communication receiver.
The Tektronix 180 has toggle switches. The 180A has pushbutton switches.
- Tektronix 180A Manual (PDF)
- Tektronix 180 Field Recalibration Procedure (PDF)
- Tektronix 180A Factory Calibration Procedure (PDF)
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Oscillator circuit in 180A using 158-007
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180A internal
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180A internal
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180A internal
