hi list，
I plan to buy a gps module ，the gps module have 1pps pin and uart pin. I will
connect the 1pps pin to b205mini “REF” sma port to Disciplin The local clock.
And connect uart pin to gpio to read time info.
That is ok?
Thanks!
Best Regards,
Charlies
_
Never-mind. I found the issue.
I forgot to set the 'PC Clock' setting in the sink block. We are back to
perfect packet delivery on low sample rates and near perfect packet
delivery on high sampling rates.
On Wed, Apr 3, 2019 at 3:07 PM Freedman, Michael - 1008 - MITLL <
mfreed...@ll.mit.edu> wrot
Hello everyone,
I recently upgraded two of our N310's and our host server from 3.13.1.0 to
3.14.0.0.
UHD, GNU Radio (host), FPGA, SDIMG, were all uninstalled, compiled again,
and updated/flashed/imaged appropriately.
Additionally, nothing in our set up has changed other than the version of
UHD.
Dear all,
I have some questions about how to trigger RFNOC receiver. I have a module
detecting the rising edge of a fixed clock. I used that clock to trigger Tx and
Rx modules. Now the transmit RFNOC module is working properly but the receive
module gives me non-deterministic m_axis_data_tvalid
Hi,
After disconnecting LO cables signal on the daughter-board that imports
LOs disappears. So GNU Radio correctly configures distribution of LOs.
Also the +/- 90 degree changes happen completely deterministically in
given ranges of carrier frequencies.
So the question remains open: what is causi
I am trying to follow the instructions at
https://files.ettus.com/manual/page_usrp_e3x0.html
I have a fresh installation of Ubuntu (either 16.04 or 18.04)
When I get to the point of setting up the cross compilation
environment, I get a fatal error. This is some sort of Python issue,
for which I a
On 04/03/2019 05:55 AM, Koyel Das (Vehere) wrote:
Hi Marcus,
Thank you very much for your reply. I have few doubts. Please clarify:
In the link that you sent there are total 8 sma ports for A slot and B
slot
LO Sharing with Neighbour TwinRXs
TwinRX (A Slot) TwinRX (B Slot)
Hi,
I don't know what this patch does, but there is not software required
under certain circumstances. The reference clock is 200 MHz and there
are a few PLLs which are used to generate your LOs. When the PLLs run in
interger-N mode (which can be defined in the API, when explicitly
setting the
Hello everyone,
I am implementing the system on USRP X310 where the maximum sampling rate
needs to be used on both Rx channels, so in total ( 2 (IQ) x 2 (RF cards) x
200 MSPs).
After doing tests of throughput between USRP and PC, I experience that
there will be bottleneck related to writing sampl
To answer my own question:
https://github.com/EttusResearch/uhd/blob/master/CHANGELOG#L226
it seems the answer is yes.
--
Piotr Krysik
W dniu 03.04.2019 o 12:34, Piotr Krysik via USRP-users pisze:
> Hi,
>
> W dniu 03.04.2019 o 12:15, Fabian Schwartau via USRP-users pisze:
>> (...)
>> Keep in mind
Hi,
W dniu 03.04.2019 o 12:15, Fabian Schwartau via USRP-users pisze:
> (...)
> Keep in mind that it is not necessary to use LO-sharing to get a well
> defined phase relation between the channels. Depending on your
> frequency and bandwidth settings, it is possible to also achive this,
> as all LO
Hi,
yes, the result for multiple measurements (start ups of the system) at a
single frequency was different by multiples of 90°.
We did not investigated the problem any further, but I am quite sure
that gnuradio was not synchronizing the channels using the LO-sharing,
although it was selected.
Hi Fabian,
W dniu 03.04.2019 o 11:05, Fabian Schwartau via USRP-users pisze:
> Hi Piotr,
>
> we once had a very similar issue. But we also saw this on the same
> frequency when switching between frequencies. Can you try this as
> well? Just switch forth and back between two frequencies and just pl
Hi Marcus,
Thank you very much for your reply. I have few doubts. Please clarify:
In the link that you sent there are total 8 sma ports for A slot and B slot
LO Sharing with Neighbour TwinRXs
TwinRX (A Slot) TwinRX (B Slot)
J1 LO2 Export J2 LO2 Input
J2 LO2 InputJ1 LO2 Export
J3 LO1 Expo
Hi Piotr,
we once had a very similar issue. But we also saw this on the same
frequency when switching between frequencies. Can you try this as well?
Just switch forth and back between two frequencies and just plot one of
them?
As far as I remember the issue was because we were not using the
L
W dniu 03.04.2019 o 10:34, Piotr Krysik via USRP-users pisze:
> Hi all,
>
> I'm trying to do calibration of phase offsets between TwinRX channels.
>
> Configuration of X310 is following: two TwinRX'es, all sharing LOs from
> fist channel of the second TwinRX.
>
> The same signal is fed to all TwinR
Hi all,
I'm trying to do calibration of phase offsets between TwinRX channels.
Configuration of X310 is following: two TwinRX'es, all sharing LOs from
fist channel of the second TwinRX.
The same signal is fed to all TwinRX channels through a RF splitter.
What is expected is some additional grou
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