Ok, thank you for the information, that has been really helpful. I will get
back to you with results once I am able to get the inline attenuator and run
the tx_waveforms test.
Best Regards,
Jerrid
From: Marcus D. Leech
Sent: Thursday, March 25, 2021 4:07 PM
To: Jerrid Plymale
Cc: USRP-users@
On 03/25/2021 07:01 PM, Jerrid Plymale wrote:
We currently are not using a 30dB attenuator in the coax line, I was
not aware that one was needed until you brought it up. We are looking
into getting one ordered at the moment. Could this be the cause of the
problem?
Best Regards,
Jerrid
The
We currently are not using a 30dB attenuator in the coax line, I was not aware
that one was needed until you brought it up. We are looking into getting one
ordered at the moment. Could this be the cause of the problem?
Best Regards,
Jerrid
From: Marcus D Leech
Sent: Thursday, March 25, 2021 3
On 03/25/2021 06:27 PM, Jerrid Plymale wrote:
Yes, moving TX out of the RX band has no affect on the noise level
increase.
Best Regards,
Jerrid
OK, so, let's get Gnu Radio out of the way.
Using the tx_waveforms UHD example (usually in
/lib/uhd/examples) try sending a CW tone with a --amp
Could you confirm that you’re using at least 30dB of attenuation in the coax
link?
Sent from my iPhone
> On Mar 25, 2021, at 6:27 PM, Jerrid Plymale
> wrote:
>
>
> Yes, moving TX out of the RX band has no affect on the noise level increase.
>
> Best Regards,
>
> Jerrid
>
> From: Marcu
Yes, moving TX out of the RX band has no affect on the noise level increase.
Best Regards,
Jerrid
From: Marcus D Leech
Sent: Thursday, March 25, 2021 2:29 PM
To: Jerrid Plymale
Cc: USRP-users@lists.ettus.com
Subject: Re: [USRP-users] Strong noise added to signal transmitted by X310 with
a UBX
If you move the TX out of band with respect to the RX do you still see the
noise when the TX graph starts?
Sent from my iPhone
> On Mar 25, 2021, at 3:57 PM, Jerrid Plymale
> wrote:
>
>
> So I was able to test setting up both USRPs with the same 10 MHz reference
> signal, and there was n
So I was able to test setting up both USRPs with the same 10 MHz reference
signal, and there was no improvement to the noise being added.
If the flowgraph just emits a CW tone, we see a similar response, the added
noise is still there and at the same level, we just have the added spike of the
C
Hi Ben,
As I understand it, the UHD Source and Sink blocks must be in the same
flowgraph. Otherwise, after you start one flowgraph, the other will say
it can't find the device, or some similar error.
For how I solved the problem, see
https://raw.githubusercontent.com/duggabe/gr-control/main/
On 03/25/2021 01:23 PM, Ben Magistro wrote:
This might be more of a GNURadio question, but is it possible to share
a single USRP device (E310 in this case) with two flowgraphs? What I
mean is the E310 has a "A" and "B" channel, could you use channel "A"
with one flowgraph and "B" with another
Hi Jeff,
In RFNoC 3 / UHD 3.15, when doing host -> RFNoC -> host flowgraphs, you
need to always have at least two RFNoC blocks. This is a limitation due to
the way RFNoC 3 is integrated with GNU Radio. That issue was fixed in RFNoC
4 by introducing the tx / rx_streamer blocks.
Jonathon
On Thu, M
I am using the standard X310 HG image running a simple flow graph with one
dma_FIFO as follows, and the flowgraph freezes after approximately 800,000
samples:
signal_source --> throttle --> dma_fifo --> timesink
However, if I put an RFNOC block in, it works:
signal_source --> throttle -->
This might be more of a GNURadio question, but is it possible to share a
single USRP device (E310 in this case) with two flowgraphs? What I mean is
the E310 has a "A" and "B" channel, could you use channel "A" with one
flowgraph and "B" with another or does everything have to be implemented in
a s
On 03/25/2021 12:07 PM, Minutolo, Lorenzo wrote:
This is very interesting. I am trying to set the rx bandwidth on a
N321 for a while now.
Is there any workaround? Our bandwidth seems stuck at 8MHz while our
application needs much more.
Thanks
Lorenzo
Sorry, on the N32x series, the analog b
If you do t specify bandwidth at all, and rely on the automatic analog
bandwidth setting what happens?
Normally UHD will set an analog bandwidth that is appropriate for the selected
sample rate.
Sent from my iPhone
> On Mar 25, 2021, at 12:07 PM, Minutolo, Lorenzo wrote:
>
> This is very
This is very interesting. I am trying to set the rx bandwidth on a N321 for a
while now.
Is there any workaround? Our bandwidth seems stuck at 8MHz while our
application needs much more.
Thanks
Lorenzo
On Feb 25, 2021, at 10:32 AM, Marcus D. Leech via USRP-users
wrote:
On 02/25/2021 11:3
Hi Jonathon,
Thank you for replying back, I have watched both videos RFNoC 3 and 4 and
based on them along with the UHD 4 guide, I noticed that the DmaFIFO was
used in some cases.
For instance, based on the video RFNoC 3, in the fosphor demo with 100M
Rate, DmaFIFO and RFNoC FIFO blocks were us
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