Sampling is normally carried out in Port order, that is, Port 1 is first, followed by Port 2, 3, and 4. Using the radio buttons in the Port Sequence panel you can choose the order of ports sampled, hence DUT channel sampling. Figure 1 shows a high-level overview of how the serial ports are connected for RS-232 and the direction of data transmission for them. The table below provides some specifications regarding the RS-232 implementation on Ocean spectrometers. For the manual release history, see page 227. Acrobat, Adobe, and Adobe Reader are trademarks of Adobe Systems Incorporated.