[USRP-users] OTW format in B210

2021-11-15 Thread zhang.weit3
Hi, I am playing with one B210. I just want to check whether B210 can support sc12 as over-the-wire format. Thank you for the help in advance! West ___ USRP-users mailing list -- usrp-users@lists.ettus.com To unsubscribe send an email to us

[USRP-users] OctoClock-G driving by external pps

2021-11-05 Thread zhang.weit3
Hi, I am playing with an OctoClock-G, where I would like to use an external PPS which has a rate of 10kHz (two pulses per second). I am wondering whether the OctoClock-G can also create distributed 10kHz signals at the outputs. Could anyone help here? Thank you! Regards, West ___

[USRP-users] USRP B200 min-i

2021-11-02 Thread zhang.weit3
Hi All, I have a USRP B200 mini-i under testing. But I only see the REF port which I am assuming is for external 10MHz clock input. Is there any port for 1PPS input for time synchronization? Does it support both external PPS input and 10MHz clock input? Thank you! West ___

[USRP-users] LO initial phase changes when calling get_tx_streamer/get_rx_streamer

2021-09-20 Thread zhang.weit3
Hi, I am playing with the B2XX series boards. I noticed that the LO initial phase got changed when calling the API get_tx_stream (or get_rx_stream), which means the PLL or LO are initialized. Why this stream command is related to the LO settings? I would expect it is only related to the baseban

[USRP-users] Absolute Tx/Rx delay of USRP B210

2021-09-02 Thread zhang.weit3
Hi all, I did a loopback test and can measure the relative delay between the Tx and Rx, which is about 10us. It means that, if the Tx and Rx are triggered at 0sec by setting the start time in software, the absolute start time of the Rx will be T0, and the absolute start time of the Tx will be T

[USRP-users] How does 1PPS work in USRP

2021-08-10 Thread zhang.weit3
Hi all, I am trying to reset multiple USRPs' time to 0.000s using a shared 1PPS (1Hz clock signal). As far as I know, the UHD API function is simply to wait for the PPS rising edge and latch the 0.000s value to all USRPs: usrp->set_time_next_pps(uhd::time_spec_t(0.0)). My question is that

[USRP-users] FPGA as OctoClock-G

2021-08-09 Thread zhang.weit3
Hi, I am thinking of using FPGA to generate 1PPS and 10MHz signals for multi-USRP, which plays the same functionality as that of the OctoClock-G module. Will there be any potential shortcomings to use FPGA compared to OctoClock-G? Thank you, Weit ___

[USRP-users] Initialize LO Frequency

2021-07-08 Thread zhang.weit3
Hi all, I am playing with a B210. I noticed the LO TX/RX frequency is initialized to 1.0GHz whenever the USRP object is created in Python by uhd.usrp.MultiUSRP. I am trying to have a different initial frequency, for instance 700MHz, which means that the LO will always operate at 700MHz whenever