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by Bill Degnan - 04/26/2015 08:16 | |
One final comment about the RS232 converter...They're nice when you want to troubleshoot problems because the signals are easier to use with an oscilloscope than current loop.
Take a look at this oscilloscope output for an example. Attach RS232 output pins 2&3 to positive, pin 7 to the return. Type a key on the keyboard (or advance the reader) while the Teletype is in LINE mode. With 2 and 3 connected on the RS232 end, you'll get the characters echoed back to the Teletype printer AND the signal will appear on your oscilloscope. The above linked photo has settings you can try. Reply |