Thank you for the answer, I found the command is freq. I think I will need to develop a trigger block, so that if it sees a change-frequency message, it will trigger a command to USRP sink/source.
On Wed, Nov 9, 2016 at 1:55 PM, Osama Riad <[email protected]> wrote: > I think you should use stream tags.In uhd you can send a command with each > Burst this command is to be executed by the usrp one command is called > tx_freq I think. > You can check this through the internet. > Br, > Osama > > > On Wednesday, November 9, 2016, Dat Luu <[email protected]> wrote: > >> Hello everyone, >> >> I have been working on tx/rx data using USRP B210. I am able to transmit >> a message and verify the correct content on the receiver side. The next >> step I want to do is: >> >> 1. upon sending a specific message (frequency change), I want to change >> the frequency of the USRP sink (tx side) >> 2. upon receiving a specific message (frequency change) I want to change >> the frequency of the USRP source (rx side) >> >> My question is what will be the best way to do it? I know that I will >> need to pause the flow graph on tx/rx side, and reload the USRP blocks with >> the new frequency. But, I dont know when the message will arrive; I cannot >> do a timing triggering on the flow graph. >> >> Thank you in advance. >> >
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