In the old days, back when machines were as simple as the old, clickety-clackety teletype printers, the technician would feed a paper tape into the printer's tape reader. This punched paper tape had its ends spliced together with adhesive tape. This way the same input might be read over and over until the technician had properly adjusted the machine to faithfully print out what was on the tape. Successive approximation after successive approximation, a turn of the screwdriver one direction and then back, the technician would adjust the machine, slowly, slowly until it could faithfully reproduce the input recorded on the punched paper tape.
Technicians always used the same input, one that, you will notice, employs all the characters of the alphabet: THE QUICK BROWN FOX JUMPS OVER THE LAZY DOGS BACK 1234567890 THE QUICK BROWN FOX JUMPS OVER THE LAZY DOGS BACK 1234567890 over and over and over again.
Here we witness our latter-day technician calibrate a spacetime engine, using the simplest possible recording, one representing the most fundamental elements of an engine's creation algorithm. When the highest fidelity to its core moral code programming had been achieved, the engine might then be placed into service to await mating.
https://www.youtube.com/watch?v=Te7pekFqKiQ&feature=youtube_gdata_player