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7000 series readout system: Difference between revisions
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Tek part number 670-8622, was introduced, in which the character generator is based on digital values stored in a 2732 EPROM instead of Gilbert's analog ROMs. This board was installed e.g. in the [[R7103]] and [[7904A]] and still used some of the Tek-made readout ICs like the timing generator. | Tek part number 670-8622, was introduced, in which the character generator is based on digital values stored in a 2732 EPROM instead of Gilbert's analog ROMs. This board was installed e.g. in the [[R7103]] and [[7904A]] and still used some of the Tek-made readout ICs like the timing generator. | ||
The number of display points was increased to up to 16 per character. The presence of this board can be detected from the outside by looking at the readout characters which are straight up but were italicized in the analog version (which was done the analog way too, by adding some 10% of the vertical signal to the horizontal channel). The character style itself is also different — for example, the "V" in the classic board has just two straight lines, whereas they are angled in the digital version. | The number of display points was increased to up to 16 per character. The presence of this board can be detected from the outside by looking at the readout characters which are straight up but were italicized in the analog version (which was done the analog way too, by adding some 10% of the vertical signal to the horizontal channel). The character style itself is also different — for example, the "V" in the classic board has just two straight lines, whereas they are angled in the digital version. | ||
[[File:EPROM based 7000 series readout board.jpg | [[File:EPROM based 7000 series readout board.jpg|400px]] | ||
===Microcontroller-based Readout Board=== | ===Microcontroller-based Readout Board=== | ||
Finally, from 1989/1990 on, a third generation readout board designed around an 80C31 | Finally, from 1989/1990 on, a third generation readout board designed around an 80C31 micro-controller replaced the previous versions in the last series of [[7104]], [[R7103]], [[R7844]] and [[7904A]] models.This version no longer used any Tek-made special ICs, manufacture of which had been discontinued by that time. | ||
[[File:Microcontroller based readout board block diagram.jpg| | [[File:Microcontroller based readout board block diagram.jpg|600px|Block diagram of 8031 based readout board]] | ||
==Literature== | ==Literature== | ||