Design of long passive oscilloscope probes to simplify maintenance of large digital computers

THE cathode-ray oscilloscope is a powerful tool for the maintenance of digital computers, but its use on a mobile cart is often awkward and does not permit the oscilloscope to be used to its fullest advantage. If, however, the oscilloscope could be permanently mounted at the maintenance console and supplied with signals from a network of long probe lines running into the computer, operators at the console could view a comprehensive display of computer wave forms and direct maintenance activities accordingly.