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P7001: Difference between revisions
Added short description of sample&Hold card
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(Added short description of sample&Hold card) |
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{{Spec | Memory | four waveforms, 512 samples each (4K × 10 bit core, or multiple 1k × 10 bit or 2k × 10 bit RAM boards) }} | {{Spec | Memory | four waveforms, 512 samples each (4K × 10 bit core, or multiple 1k × 10 bit or 2k × 10 bit RAM boards) }} | ||
{{Spec | Sampling rate | 150 kHz ±30 kHz }} | {{Spec | Sampling rate | 150 kHz ±30 kHz }} | ||
{{Spec | Single shot performance | 500us/DIV }} | |||
{{Spec | External interface | 16 bit parallel, proprietary "[[CP bus]]" (dual 37-pin [[Sub-D connector]]s) interfacing with Tektronix CP-1100 or CP-4100 series controllers }} | {{Spec | External interface | 16 bit parallel, proprietary "[[CP bus]]" (dual 37-pin [[Sub-D connector]]s) interfacing with Tektronix CP-1100 or CP-4100 series controllers }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
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The Display Generator card generates the CRT display of either real-time computer output (XY mode) or data stored in the processsors memory (XT mode). Any combination of the stored and acquired waveforms may be displayed simultaneously. Also, since the display generator operates independent of other devices, changing data may be viewed during a store operation. The Display Generator card has a set of jumpers which switch the CRT output between vector and dot display. | The Display Generator card generates the CRT display of either real-time computer output (XY mode) or data stored in the processsors memory (XT mode). Any combination of the stored and acquired waveforms may be displayed simultaneously. Also, since the display generator operates independent of other devices, changing data may be viewed during a store operation. The Display Generator card has a set of jumpers which switch the CRT output between vector and dot display. | ||
===Sample & Hold=== | |||
The functionality of the Sample & Hold card can be divided into 3 areas: Display switching, sampling and multiplexing. The display switching section determines which waveform (real time or stored) is sent to the CRT and is designed around two Tek-made analog multiplexer chips [[155-0022-00]]. A fast [[sampling diodes|four-diode sample and hold circuit]] is the heart of the sampling circuit. Regardless of sweep speed, the sample & Hold card takes a sample every 6.5us. At first the vertical axis is sampled, 95 nanoseconds later the horizontal axis and the blanking. In the last stage the sampled signals are time-multiplexed to provide one output to the A/D converter. The complete timing of the sample & hold circuits is controlled by the A/D Converter card. | |||
===Hardware Signal Averager=== | ===Hardware Signal Averager=== | ||