USRP transmitting and recieving

[Eldokch]

Hello , i have a very strange problem i want to hear your opinion about...i am trying to send a waveform and recieve it in the same VI...the problem is the time axis of the transmitted wave is totally diffrent than the recieved wave...i want them to be the same....for example how is it possible that i am sending a bit 1 for example in 5 microseconds and receive it in 5 milliseconds....my second problem is that sometimes i recieve the shape of the wave in its correct form but when i run the program again the amplitude is reversed and then i run again the amplitude is right again..and soo random like that i hope i am clear enough and i hope you can answer me as soon as possible if you may Thanks you in advance

[Eldokch]

Hello , i have a very strange problem i want to hear your opinion about...i am trying to send a waveform and recieve it in the same VI...the problem is the time axis of the transmitted wave is totally diffrent than the recieved wave...i want them to be the same....for example how is it possible that i am sending a bit 1 for example in 5 microseconds and receive it in 5 milliseconds....my second problem is that sometimes i recieve the shape of the wave in its correct form but when i run the program again the amplitude is reversed and then i run again the amplitude is right again..and soo random like that i hope i am clear enough and i hope you can answer me as soon as possible if you may Thanks you in advance

[Sarah_Y]

Hi Eldorkch,

I don't understand what you are seeing clearly enough to offer you a solution.  Can you please post a screen shot or 2 of this behavior that you are seeing?  If possible, please post your VI as well.  Also what model of USRP are you using (29xx or motherboard/daughterboard combination please)?

[Eldokch]

The modulationg waveform is the one i want to transmit

as you notice the time axis is diffrent i am sending with a rate diffrent than the recieving one.HOW IS THAT POSSIBLE ?

but here thank god the recievied wave is similar to the transmitted...but when i run the program again i get this

now the rate is diffrent and also the wave recieved itself

and here's the VI