Re: [USRP-users] Exact alignment between gnuradio sample stream and USRP time

2020-01-23 Thread Lukas Haase via USRP-users
> On 01/23/2020 12:32 PM, Lukas Haase via USRP-users wrote: >> Hi, >> >> TO MY UNDERSTANDING, the USRP has an internal clock that is different from >> host clock when running gnuradio (which makes sense because there are >> buffers etc in between). >> Example: I transmit a CW at f=1001, receive i

Re: [USRP-users] E312 Multi-channel issues

2020-01-23 Thread Beeman, Isaac L. via USRP-users
Hello everyone, Sorry for the double message in the same thread, but I thought I would add some of the things I discovered since yesterday in case anyone takes a look at this thread. First, it appears that I am not the only person to have this issue: http://lists.ettus.com/pipermail/usrp-users

Re: [USRP-users] Exact alignment between gnuradio sample stream and USRP time

2020-01-23 Thread Marcus D. Leech via USRP-users
On 01/23/2020 12:32 PM, Lukas Haase via USRP-users wrote: Hi, TO MY UNDERSTANDING, the USRP has an internal clock that is different from host clock when running gnuradio (which makes sense because there are buffers etc in between). Example: I transmit a CW at f=1001, receive it at f=1000 and t

Re: [USRP-users] B200 Output Frequency

2020-01-23 Thread Marcus D Leech via USRP-users
You’re presumably transmitting a 10kHz tone at 80Mhz? Is your counter locked to the same reference as the USRP? Sent from my iPhone > On Jan 23, 2020, at 5:30 PM, Remco Vink via USRP-users > wrote: > >  > All, > > I am currently trying to generate a stable sine wave out of the B200 TX port

[USRP-users] Exact alignment between gnuradio sample stream and USRP time

2020-01-23 Thread Lukas Haase via USRP-users
Hi, TO MY UNDERSTANDING, the USRP has an internal clock that is different from host clock when running gnuradio (which makes sense because there are buffers etc in between). Example: I transmit a CW at f=1001, receive it at f=1000 and then use gnuradio to downconvert the remaining 1 MHz I run i

Re: [USRP-users] using GPIO output to trigger external RF switches

2020-01-23 Thread Thomas Harder via USRP-users
Sam, I see want you mean but in my code I set the carrier freq once with set_tx_freq (). Then I read the I Q data from a .dat file into the buffer and stream this buffer continuously in a while loop. The frequency hopping is done though my IQ modulation: I = cos(omegan * t) Q= sin(omegan*t) with