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Pimp my scope: Unlocking Software Features in a Tektronix TDS784D

A while ago I've acquired an old Tektronix TDS784D oscilloscope. Originally, it came with these enabled options:

  • 05 - Video Trigger
  • 13 - Centronics and RS232 interface
  • 1F - Floppy disk drive
  • 1M - Memory upgrade x1
  • 2F - Maths/FFT, differentiation features

While this already is a lot, there's still option 2C (Comm signal analyser) which is a pure-software option. (In later production runs, the device might also already contain the necessary hardware for the bigger memory option 2M. Check whether your serial number starts with B4xxx. Mine didn't.)

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GOTEK Slim Floppy Emulator SFR1M44-DU26

For an older oscilloscope I wanted to replace the 3.5" floppy drive with USB. After checking for the required connector and available USB emulators, the one that I needed was the GOTEK SFR1M44-DU26 - an 1.44 MB floppy emulator with a 26pin FFC/FPC connector. (There's also the SFR1M44-TU26 - which has the connector mounted the other way around but should also work.)

Tektronix TDS784D with original disk drive and emulator next to it

The emulator fit almost perfectly, but since it was meant to be used with some embroidery machine it was a bit short on one side. But that's nothing to worry about - it still functions as it should.

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