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7D20: Difference between revisions
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* [[Media:070-3205-01.pdf|Tektronix 7D20 Reference Guide]] | * [[Media:070-3205-01.pdf|Tektronix 7D20 Reference Guide]] | ||
* [[Media:070-3857-01.pdf|Tektronix 7D20 Operators Manual]] (OCR) | * [[Media:070-3857-01.pdf|Tektronix 7D20 Operators Manual]] (OCR) | ||
* [[Media:070-3858-01.pdf|Tektronix 7D20 Service Manual]] (OCR) / [http://bama.edebris.com/download/tek/7d20/tek-7D20.pdf @ BAMA] | * [[Media:070-3858-01.pdf|Tektronix 7D20 Service Manual]] (OCR) / [http://bama.edebris.com/download/tek/7d20/tek-7D20.pdf @ BAMA] | ||
* [[Media:070-1728-00.pdf|Tektronix 7D20 Interfacing Guide]] | * [[Media:070-1728-00.pdf|Tektronix 7D20 Interfacing Guide]] | ||
* [[Media:7D20 SMPS AnalysisDFT Apr1984.pdf|EDN Article by Clark Foley and Jim Lamb on SMPS diagnosis featuring the 7D20 | * [[Media:7D20 SMPS AnalysisDFT Apr1984.pdf|EDN Article by Clark Foley and Jim Lamb on SMPS diagnosis featuring the 7D20]] | ||
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The '''Tektronix 7D20''' is a two-channel digitizing plug-in for [[7000-series scopes]]. It is a triple-width plug-in and provides both vertical and horizontal signals to the scope. | The '''Tektronix 7D20''' is a two-channel digitizing plug-in for [[7000-series scopes]]. It is a triple-width plug-in and provides both vertical and horizontal signals to the scope. | ||
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The analog waveforms that are sent to the 7000-series mainframe are generated by vertical and horizontal DACs. The DACs outputs can be calibrated for scaling and shift so that signals are accurately displayed on the oscilloscope screen. | The analog waveforms that are sent to the 7000-series mainframe are generated by vertical and horizontal DACs. The DACs outputs can be calibrated for scaling and shift so that signals are accurately displayed on the oscilloscope screen. | ||
The 7D20 has a "roll" mode that emulates a paper roll chart, as if the waveform were being drawn by a pen on the right side of the screen while the paper is being moved to the left at a constant rate. No equivalent to "roll" exists in analog scopes. The Tektronix [[2212]] also | The 7D20 has a "roll" mode that emulates a paper roll chart, as if the waveform were being drawn by a pen on the right side of the screen while the paper is being moved to the left at a constant rate. No equivalent to "roll" exists in analog scopes. The Tektronix [[2212]]/[[2216]], [[2220]]/[[2221]]/[[2230]] and possibly others also have this feature. | ||
The 7D20 can give [[NVRAM errors]] that are often easy to fix. | The 7D20 can give [[NVRAM errors]] that are often easy to fix. | ||