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Apple II aScope Digital Memory Oscilloscope Model 85 Northwest Instrument System

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Apple II " aScope " Digital Memory Oscilloscope Model 85 by Northwest Instrument Systems

From the product advertisement: "In a word, the Model 85 aScope is a dual channel, DC to 50 MHz, fully programmable, digital memory oscilloscope designed to operate with any Apple II or Apple II Plus equipped with Disk II and display, 48K memory and DOS 3.3."

This listing includes the oscilloscope which occupies two slots in the Apple II computer, the ORIGINAL Users Manual and the ORIGINAL floppy disk software.

There were no probes with the instrument when I received it, so I purchased one probe from Jameco for about $30 and it is included with the listing. The buyer can easily obtain another one for the second channel.

The circuitry inside this instrument was pushing the envelope for the time given the Apple II specifications. However, I have not used an oscilloscope much. I know that the aScope works, but I think someone with more experience can adjust both the probe and the settings (via the Apple II keyboard & the software) much better than I can.

There are several articles and advertisements in Byte magazine when the aScope was introduced. Full .PDF versions of Byte are available online.

https://worldradiohistory.com/hd2/IDX-Consumer/Archive-Byte-IDX/IDX/80s/82-83/Byte-1982-09-OCR-Page-0253.pdf

https://worldradiohistory.com/hd2/IDX-Consumer/Archive-Byte-IDX/IDX/80s/82-83/Byte-1983-06-OCR-Page-0482.pdf

https://worldradiohistory.com/hd2/IDX-Consumer/Archive-Byte-IDX/IDX/80s/82-83/Byte-1983-06-OCR-Page-0482.pdf

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