 Other manufacturers avoided this by using built-in composite monitors, such as the Commodore PET and TRS-80.In a July 1977 visit with the engineering staff, a Texas Instruments (TI) salesman presented a new possibility in the form of an inexpensive fibre optic cable with built-in transceivers.During the meeting, Joe Decuir proposed placing an RF modulator on one end, thereby completely isolating any electrical signals so that the computer itself would have no RF components.