P7001: Difference between revisions

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The design of the P7001 assumes it will be part of a 7704A system, and that the 7704A will be displaying a steady trace.   
The design of the P7001 assumes it will be part of a 7704A system, and that the 7704A will be displaying a steady trace.   
The vertical and horizonal plug-ins control the beam as they would in any 7000-series scope.   
The vertical and horizonal plug-ins control the beam as they would in any 7000-series scope.   
The P7001 periodically samples the horizontal and vertical signals simultaneously as they pass from the plug-ins  
The P7001 periodically samples the horizontal and vertical signals simultaneously as they pass from the plug-ins  
to the vertical and horizontal amplifiers.   
to the vertical and horizontal amplifiers.   
This allows it to fill the memory with data points represented as coordinate pairs, (x1,y1), (x2,y2), (x3,y3), etc.   
This allows it to fill its memory with data points represented as coordinate pairs, (x1,y1), (x2,y2), (x3,y3), etc.   
It is not necessary that x2 be greater than x1, i.e. the samples can be taken out-of-order with respect to their equivalent time in the waveform.
It is not necessary that x2 be greater than x1, i.e. the samples can be taken out-of-order with respect to their equivalent time in the waveform.
==Manuals==
* [http://w140.com/p7001 Tektronix P7001 Manuals (PDF)]
==Internals==


The signal coming from the acquisition unit enters a fast [[sampling diodes|four-diode sample and hold circuit]] where it is sampled at 150 ksamples/sec.
The signal coming from the acquisition unit enters a fast [[sampling diodes|four-diode sample and hold circuit]] where it is sampled at 150 ksamples/sec.
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The Acquisition Unit of the 7704A, the P7001 Processor, and the Display Unit of the 7704A are connected by the  
The Acquisition Unit of the 7704A, the P7001 Processor, and the Display Unit of the 7704A are connected by the  
Acquisition-Processor-Display (APD) Interface shown below.
Acquisition-Processor-Display (APD) Interface shown below.
[http://w140.com/p7001 Tektronix P7001 Manuals (PDF)]


==Pictures==
==Pictures==

Revision as of 03:16, 26 August 2017

Tektronix P7001 front panel

The Tektronix P7001 is a digitizer, processor, and memory for the 7704A oscilloscope.

The design of the P7001 assumes it will be part of a 7704A system, and that the 7704A will be displaying a steady trace. The vertical and horizonal plug-ins control the beam as they would in any 7000-series scope.

The P7001 periodically samples the horizontal and vertical signals simultaneously as they pass from the plug-ins to the vertical and horizontal amplifiers. This allows it to fill its memory with data points represented as coordinate pairs, (x1,y1), (x2,y2), (x3,y3), etc. It is not necessary that x2 be greater than x1, i.e. the samples can be taken out-of-order with respect to their equivalent time in the waveform.

Manuals

Internals

The signal coming from the acquisition unit enters a fast four-diode sample and hold circuit where it is sampled at 150 ksamples/sec. Each sample is digitized using a successive-approximation scheme. The analog to digital converter is made of several chips: a digital to analog converter, a comparator, and control logic.

The P7001 has its own power supply built into it, independent of the power supply in the acquisition unit of the 7704A. It has a backplane with an asynchronous bus and several cards that plug into that bus - sampler, analog to digital converter, memory, external digital interface, and display electronics. Early versions of the P7001 use core memory, later versions use semiconductor RAM. The bus is used for low speed signals. High speed signals are sent through coaxial cables that connect to the cards using Peltola connectors.

The Acquisition Unit of the 7704A, the P7001 Processor, and the Display Unit of the 7704A are connected by the Acquisition-Processor-Display (APD) Interface shown below.

Pictures

Internal

  • Top view

    Top view

  • Front of backplane

    Front of backplane

  • Rear of backplane

    Rear of backplane

  • Interunit connector

    Interunit connector

  • Interunit connector

    Interunit connector

  • Interunit connector

    Interunit connector

  • Switching power supply

    Switching power supply

Sample and Hold Card

  • Vertical sampling bridge

    Vertical sampling bridge

  • Horizontal sampling bridge

    Horizontal sampling bridge

  • Sampling strobe generator

    Sampling strobe generator

  • Sample and hold edge connector

    Sample and hold edge connector

  • Sample and hold transformers

    Sample and hold transformers

  • Sample and hold transformer

    Sample and hold transformer

  • Sample and hold rear

    Sample and hold rear

Controller and memory

  • Controller card

    Controller card

  • Controller card

    Controller card

  • Controller card

    Controller card

  • Address decoder

    Address decoder

  • Core boards

    Core boards

  • Core memory

    Core memory

  • Core closeup

    Core closeup

  • Core closeup

    Core closeup

ADC and Display

  • Front panel connections

    Front panel connections

  • ADC

    ADC

  • ADC rear

    ADC rear

  • Probe points on ADC

    Probe points on ADC

  • Display generator

    Display generator

  • Display generator rear

    Display generator rear

  • Z-axis and panel controller

    Z-axis and panel controller

  • Z-axis and panel controller rear

    Z-axis and panel controller rear

  • Readout interface

    Readout interface

Schematics

  • Power supply schematic 1

    Power supply schematic 1

  • Power supply schematic 2

    Power supply schematic 2

  • APD Interconnect

    APD Interconnect

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