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* [https://w140.com/tek_fcp/tek_type_180a_factory_cal_proc.pdf Tektronix 180A Factory Calibration Procedure] | * [https://w140.com/tek_fcp/tek_type_180a_factory_cal_proc.pdf Tektronix 180A Factory Calibration Procedure] | ||
* [[Media:Tek 180 180a irb no ocr.pdf|Tektronix 180 and 180A Instrument Reference Book]] (needs OCR) | * [[Media:Tek 180 180a irb no ocr.pdf|Tektronix 180 and 180A Instrument Reference Book]] (needs OCR) | ||
* [[Media:Tek 180a fcp.pdf|Tektronix 180A Factory Calibration Procedure (1963-06-04)]] | |||
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The '''Tektronix 180A''' was [[introduced in 1958]] and is an all-tube time mark generator with an oven-controlled crystal oscillator (OCXO). | The '''Tektronix 180A''' was [[introduced in 1958]] and is an all-tube time mark generator with an oven-controlled crystal oscillator (OCXO). |