12-07-2017 06:22 PM
Just a very simple question. If you got usrp 2953 or 2943, could you test this for me?
In both usrp, there are 2 motherboards, which distinguish by channel 0 or 1. I just want to do a very simple thing, but the experiment telling me this is not working! and I got error:
niUSRP Write Tx Data (CDB Cluster).vi<ERR>The specified session handle is invalid or does not correspond to an active session.
What I want to do is:
One USRP, use tx1 in channel 0 and tx1 in channel 1 at the same time. In other words, tx1 in channel 0 will transmit something, meanwhile tx1 in channel 1 will transmit something as well. Whatever message transmit does not matter. Just use both tx at same time.
In my project, I need to do this, and I got the error. Hence, I just open 2 NI inbuilt example: niUSRP EX PSK Tx.vi (another one is the same, just made a copy). All the parameters are the same, only the channel is different and carrier freq is different. When I start the first vi, transmission started, but if I start the another one, the 1st one will got error and stop, 2nd one will start without error. Please check the picture below. I started the A, A will run without error. But once I start B, A will be stopped and error happen, meanwhile B will start to run without error. Thank you for your help! Thank you!
12-07-2017 06:39 PM
I just tried 2 "niUSRP EX PSK Rx.vi" to receive for rx2 at the same time for channel 0, 1. It wont work as well!!! This is true? I thought usrp 2953 has 2 motherboard, so they can run at the same time! Someone please verify this with me. Thank you so much.