How to measure the pinout voltage of a rs232 com1 port?

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impakt

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com1 voltage

Anyone help me please?
 

Hi,

I think it is something like the following

1) Get the pin diagram for RS232
2) Connect the ground pin(pin 7) to the(-ve) of the multimeter
3) Then connect what ever pin you want to measure to the (+ve) of the multimeter

I guess it is something like that
 

Ground pin is pin 5 (7 is RTS) on a DB9 (7 is for db25).. It should be +12 and -12..

jelydonut
 


The ground pin is 5 . I already did that before I asked on the forum but I get 0V on all the signals :|.
 

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