Vetronix mts 3100 mastertech, Руководство оператора

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Mastertech 3100 Operator’s Manual Page A-1
A. UNDERSTANDING RS232
COMMUNICATIONS
RS232 is a standard in the computer industry for serial communications between computers and peripheral
devices. Virtually all small computer systems have at least one RS232 port. RS232 links are used to
communicate with printers, display terminals, modems and many types of test equipment.
An RS232 communication link is a serial link as opposed to a parallel link. This means that data is
transmitted serially, one bit after another, over a single data line versus a number of bits being transmitted
simultaneously using multiple data lines as is done in a parallel link. Remember that the RS232 connection
will not work with a device which uses parallel data without a serial/parallel converter. This is important
since most printers connected to small computer systems are parallel printers.
Specifications for the RS232 link are provided on the following page. You should not need to use this
information unless you are trying to connect the tester to a device other than those discussed in this manual.
If you are trying to connect an RS232 compatible device to the Mastertech, you must make sure that you set
it up so that it can communicate with the tester. If you're having problems, refer to the RS232 Interface
Signal Specifications and use the following check list:
• Make sure the cable is connected
• Make sure the other device is “On Line”
• Make sure the baud rates are the same
• Make sure the data format is the same
• Make sure that the signals are connected appropriately between the two devices (the RS232 Transmit
signal must be connected to the other device's Receive line and vice versa).