I bought a GN801 GPS module from Stoton ( http://www.stotoncn.com/gnssmodule/showproduct.php?lang=en&id=42 )
Power supply range is +5V. There is an onboard MAX3232CAE that is supposed to output RS232 signal.
I need to connect this module to a third party system that only accept RS232 with -12V / +12V signals levels.
When viewing MAX3232CAE TX pin trace with an oscilloscope, i can see it outputs -6V / +6V signal.
Wasn't MAX3232 supposed to output -12/ +12V signal, did i miss something here ?
This GPS module also exists in version with TTL output rather than RS232, if i go with TTL outputs (0-5V) how could i get a real -12V / +12V RS232 output since MAX3232 looks not to do so ?
Thank you very much for your lights on this and best regards,