Dear all, 
To begin, I give you the hardware I have : 
PXI 1044 
PXI 8106 
PXI 5142 (Digitizer) 
PXI 5441 (AWG) 
I use the serial port to send commands to external hardware. In the same time I have to generate a signal with the AWG and to run an acquisition on the digitizer.  
My problem is to send a trigger signal to these two hardware when I send the write command on the serial port.  
Is it possible to send this kind of signal from the controller on RTSi lines?  
Best regards, Fabrice. 
PS: sorry for my english.