A male connector has pins inside the connector shell and a female connector has holes inside the connector shell. Connectors are typically a "D" style with 9 pins or 25 pins (DB-25 connector) with a "male" or "female" pin configuration. The interface cable must also have the proper connector on each end and the internal wiring must be correct. These cables are also called null-modem, modem-eliminator, or crossover cables. To connect these, you must use a DTE-to-DTE interface cable. Most computers are DTE (Data Terminal Equipment) devices. To connect the instrument to a computer, you must have the proper interface cable. Finally, set and verify the RS-232 communication parameters. To use the RS-232 interface make sure it is enabled (selected) and determine the proper cables to connect the computer to the instrument. When it comes to interfaces RS-232 is pretty inexpensive to incorporate and over the years many instruments have been designed with an RS-232 interface.
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