TDS3GV- This communications module adds GPIB, RS-232 and VGA ports to the oscilloscope. The GPIB port allows the customer to control the instrument remotely from a computer. The RS-232 port provides full programmability and a connection for exporting waveform data to a computer or a printer. The VGA port provides the capability to display the scope screen on a large format monitor for group viewing. All TDS3000B series oscilloscopes come standard with Ethernet and Centronics ports on the rear of the instrument. Note: Communication modules include a Programmers Manual. Communication modules may be added any time and transferred from one TDS3000B or TDS3000 to another.