This allows multiple control operations to be fully automated as single mouse clicks or keystroke operations on the computer keyboard. The FT-450 has a built-in level converter, allowing direct connection from the rear-panel CAT jack to the serial port of your computer without the need of any external boxes. You will need a serial cable for connection to the RS-232C (serial or COM port) connector on your computer. Purchase a standard serial cable (not the so-called "null modem" type), ensuring it has the correct gender and number of pins (some serial COM port connectors use a 9-pin rather than 25-pin configuration). If your computer uses a custom connector, you may have to construct the cable. In this case, refer to the technical documentation supplied with your computer for correct data connection. Vertex Standard does not produce CAT System operating software due to the wide variety of personal computers and operating systems in use today. However, the information provided in this chapter explains the serial data structure and opcodes used by the CAT system. This information, along with the short programming examples, is intended to help you start writing programs on your own. As you become more familiar with CAT operation, you can customize programs later on for your operating needs and discover the true operating potential of this system. CAT JACK PIN NO. PIN NAME N/A SERIAL OUT SERIAL IN N/A GND N/A RTS I/O --Output Input ------Input CTS Output N/A --- FUNCTION --Outputs the Serial Data from the transceiver to the computer...