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The Tektronix P7001 is a digitizer, processor,  
The '''Tektronix P7001''' is a digitizer, processor, and memory for the [[7704A]] oscilloscope.
and memory for the [[7704A]] oscilloscope.
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 design of the P7001 assumes  
The design of the P7001 assumes it will be part of a 7704A system, and that the 7704A will be displaying a steady trace.   
it will be part of a 7704A system,  
The vertical and horizonal plug-ins control the beam as they would in any 7000-series scope.   
and that the 7704A will be  
The P7001 periodically samples the horizontal and vertical signals simultaneously as they pass from the plug-ins  
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.   
to the vertical and horizontal amplifiers.   
This allows it to fill the memory with data points  
This allows it to fill the memory with data points represented as coordinate pairs, (x1,y1), (x2,y2), (x3,y3), etc.   
represented as coordinate pairs, (x1,y1), (x2,y2), (x3,y3), etc.   
It is not necessary that x2 be greater than x1.   
It is not necessary that x2 be greater than x1.   
The samples can be taken out-of-order  
The samples can be taken out-of-order with respect to their equivalent time in the waveform.
with respect to their equivalent time in the waveform.
 
The signal coming from the acquisition unit enters  
The signal coming from the acquisition unit enters a fast [[sampling diodes|four-diode]] sample and hold circuit  
a fast [[sampling diodes|four-diode]] sample and hold circuit  
where it is sampled at 150Ksamp/sec.
where it is sampled at 150Ksamp/sec.
Each sample is digitized using a successive-approximation scheme.   
Each sample is digitized using a successive-approximation scheme.   
The analog to digital converter is made of several chips:  
The analog to digital converter is made of several chips:  
a digital to analog converter, a comparator, and control logic.  
a digital to analog converter, a comparator, and control logic.  
The P7001 has its own power supply built into it,
independent from the power supply
in the acquisition unit of the 7704A. 
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 has its own power supply built into it, independent of the power supply in the acquisition unit of the 7704A. 
the P7001 Processor,  
It has a backplane with an asynchronous bus and several cards that plug into that bus:
and the Display Unit of the 7704A
sampler, analog to digital converter, memory, external digital interface, and display electronics. 
are connected by the  
Early versions of the P7001 use core memory, later versions use semiconductor RAM.  The bus is used for low speed signals. 
Acquisition-Processor-Display (APD) Interface  
High speed signals are sent through coaxial cables that connect to the cards using Peltola connectors.
shown below.
 
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.


[http://w140.com/p7001 Tektronix P7001 Manuals (PDF)]
[http://w140.com/p7001 Tektronix P7001 Manuals (PDF)]
Line 48: Line 28:
== Sample and Hold Card ==
== Sample and Hold Card ==
<gallery>
<gallery>
File:P7001 vert sample bridge.jpg|Vertical sampling bridge
P7001 vert sample bridge.jpg|Vertical sampling bridge
File:P7001 horiz sample bridge.jpg|Horizontal sampling bridge
P7001 horiz sample bridge.jpg|Horizontal sampling bridge
File:P7001 strobe gen.jpg|Sampling strobe generator  
P7001 strobe gen.jpg|Sampling strobe generator  
File:P7001 sample hold card conn.jpg|Sample and hold edge connector
P7001 sample hold card conn.jpg|Sample and hold edge connector
File:P7001 sample hold back transformers.jpg|Sample and hold transformers
P7001 sample hold back transformers.jpg|Sample and hold transformers
File:P7001 sample hold back trans.jpg|Sample and hold transformer
P7001 sample hold back trans.jpg|Sample and hold transformer
File:P7001 sample hold back.jpg|Sample and hold rear
P7001 sample hold back.jpg|Sample and hold rear
File:P7001 front.jpg|Front panel
P7001 front.jpg|Front panel
File:P7001 top.jpg|Top view
P7001 top.jpg|Top view
File:P7001 bus front.jpg|Front of backplane
P7001 bus front.jpg|Front of backplane
File:P7001 bus back.jpg|Rear of backplane
P7001 bus back.jpg|Rear of backplane
File:P7001 connector3.jpg|Interunit connector
P7001 connector3.jpg|Interunit connector
File:P7001 connector2.jpg|Interunit connector
P7001 connector2.jpg|Interunit connector
File:P7001 connector1.jpg|Interunit connector
P7001 connector1.jpg|Interunit connector
File:P7001 dpo controller.jpg|Controller card
P7001 dpo controller.jpg|Controller card
File:P7001 dpo controller board.jpg|Controller card
P7001 dpo controller board.jpg|Controller card
File:P7001 dpo controller back.jpg|Controller card
P7001 dpo controller back.jpg|Controller card
File:P7001 diode decoder.jpg|Address decoder
P7001 diode decoder.jpg|Address decoder
File:P7001 core boards.jpg|Core boards
P7001 core boards.jpg|Core boards
File:Core mat.jpg|Core memory
Core mat.jpg|Core memory
File:Core20.jpg|Core closeup
Core20.jpg|Core closeup
File:Core17.jpg|Core closeup
Core17.jpg|Core closeup
File:P7001 ps.jpg|Switching power supply
P7001 ps.jpg|Switching power supply
File:P7001 z-axis front panel rear.jpg|Z-axis and panel controller
P7001 z-axis front panel rear.jpg|Z-axis and panel controller
File:P7001 z-axis front panel.jpg|Z-axis and panel controller
P7001 z-axis front panel.jpg|Z-axis and panel controller
File:P7001 readout interface.jpg|Readout interface
P7001 readout interface.jpg|Readout interface
File:P7001 front panel connections.jpg|Front panel connections
P7001 front panel connections.jpg|Front panel connections
File:P7001 display generator rear.jpg|Display generator rear
P7001 display generator rear.jpg|Display generator rear
File:P7001 display generator.jpg|Display generator
P7001 display generator.jpg|Display generator
File:P7001 adc rear.jpg|ADC rear
P7001 adc rear.jpg|ADC rear
File:P7001 adc probe points.jpg|Probe points on ADC
P7001 adc probe points.jpg|Probe points on ADC
File:P7001 adc.jpg|ADC
P7001 adc.jpg|ADC
File:P7001 ps1.jpg|Power supply schematic 1
P7001 ps1.jpg|Power supply schematic 1
File:P7001 ps2.jpg|Power supply schematic 2
P7001 ps2.jpg|Power supply schematic 2
File:P7001 apd interconnect.jpg|APD Interconnect  
P7001 apd interconnect.jpg|APD Interconnect  
</gallery>
</gallery>


Revision as of 12:34, 3 June 2017

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 the 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. The samples can be taken out-of-order with respect to their equivalent time in the waveform.

The signal coming from the acquisition unit enters a fast four-diode sample and hold circuit where it is sampled at 150Ksamp/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.

Tektronix P7001 Manuals (PDF)

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

  • Front panel

    Front panel

  • 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

  • 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

  • Switching power supply

    Switching power supply

  • Z-axis and panel controller

    Z-axis and panel controller

  • Z-axis and panel controller

    Z-axis and panel controller

  • Readout interface

    Readout interface

  • Front panel connections

    Front panel connections

  • Display generator rear

    Display generator rear

  • Display generator

    Display generator

  • ADC rear

    ADC rear

  • Probe points on ADC

    Probe points on ADC

  • ADC

    ADC

  • Power supply schematic 1

    Power supply schematic 1

  • Power supply schematic 2

    Power supply schematic 2

  • APD Interconnect

    APD Interconnect

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