Synchronize Start Triggers FGEN with PXI-5441 and RFSA with PXI 5670

[ThrownFran]

Hello there, how can I use to synchronize transmission with PXI 5441 using FGEN and reception with PXI 5670 (DownConverter 5610 and Digitizer 5142) using RFSA?

I need a finite digital modulated signal to be received in the RFSA exacly at the time it was transmitted at the FGEN. I was trying global variables but it seems to be to slow. Any ideas or suggestions will be grateful. 

[Chantastic!]

Not sure I can answer the question, but what do you mean by "seems to be to slow?" Global variables are all in the software, so it's not unexpected that it'll take a while to send information through the software, especially if you're not using a RT system. What speeds are you expecting? 

What other hardware are you using in your system? 

[ThrownFran]

Hello Chantastic!

I used a boolean global variable to communicate  between transmission and reception. First the transmitter configures itself and waits in a loop for the boolean flag to change before starting to transmitt. At same time, the receiver will configure itself and when it starts receiving, it changes the boolean to true, to tell the transmitter to send the signal. 

When I said it was too slow, it means that I think the transmitter is taking too much time to receive the "Start NOW Transmitting" boolean from reception VI. Because Im acquiring noise. Maybe when the receiver finished acquisition, the transmitter havent even begin to transmitt. I tried delaying receiver without sucess. Transmission and Reception are finite signals, carrier frequency is 15Mhz and symbol rate is 1M/S.  I tried sending a lot of information at lower symbol rate, and to receive more samples but couldnt see the signal anywhere.

Im using the four PXI modules I mention before, plus controller 8106 and the Chassis PXI 1042Q.

Anyone knows how to use TCLK with FGEN and RFSA or PXI trigger bus? Or any method that is not as caveman as mine? Im new in this stuff.