1
>>>>>> | | |
_
>>>>>> | | | /
>>>>>> | | | | TX Frontend: 0
>>>>>> | | | | Name: UBX TX
>>>>>> | | | |
I believe I answered my own question. For anyone wondering -
RX subdev spec = A:AB B:0
Tx subdev spec = A:0 B:AB
Mike
On 04/10/2019 11:13 AM, Michael R. Freedman via USRP-users wrote:
Hello,
Can anyone tell me what the subdev spec should be when there is only
one BasicRX on one side
Hello,
Can anyone tell me what the subdev spec should be when there is only one
BasicRX on one side and a
Basic TX is on the other side. I am only using the GPIO pins so don't
care at all about the analog section.
Thanks,
Mike
___
USRP-user
us D. Leech via USRP-users wrote:
On 04/09/2019 01:19 PM, Michael R. Freedman via USRP-users wrote:
Hello,
X310 with UBX boards, individual RX streamers per channel. MultiUSRP
with either 4 or 6 channels. Occasionally one or two channels get
stuck in the zero_copy_recv spinning at 100% of the CP
Hello,
X310 with UBX boards, individual RX streamers per channel. MultiUSRP
with either 4 or 6 channels. Occasionally one or two channels get stuck
in the zero_copy_recv spinning at 100% of the CPU. When trying to shut
down the program, it stays stuck in that thread and has to be killed.
n the buffer (there always are)
and the "entire" waveform doesn’t always come out, seems like hysteresis. I
usually prepend and postpend samples and do some timing bookkeeping to account for added
samples.
-Original Message-
From: USRP-users On Behalf Of
Michael R. Freedman via
-
From: USRP-users On Behalf Of Michael R.
Freedman via USRP-users
Sent: Tuesday, April 9, 2019 11:34 AM
To: usrp-users@lists.ettus.com
Subject: [USRP-users] Propagation delay in TxStreamer X310 3.14.0.0
*** WARNING ***
EXTERNAL EMAIL -- This message originates from outside our organization.
X310 with UBX front ends.
Mike
On 04/09/2019 12:07 PM, Brian Padalino wrote:
On Tue, Apr 9, 2019 at 11:46 AM Michael R. Freedman
mailto:mfreed...@ll.mit.edu>> wrote:
I'm generating samples at 2MHz.
What Ettus radio are you using?
Brian
___
I'm generating samples at 2MHz.
Mike
On 04/09/2019 11:45 AM, Brian Padalino wrote:
On Tue, Apr 9, 2019 at 11:35 AM Michael R. Freedman via USRP-users
mailto:usrp-users@lists.ettus.com>> wrote:
Hello,
I am doing timed streaming. It appears to me that there are severa
Hello,
I am doing timed streaming. It appears to me that there are several
"zero" samples getting to the DAC prior to my waveform and as a result,
my waveform is being truncated. Has anyone else seen this?
Mike
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USRP-users mailing list
USRP
utput on a spectrum analyser,
or another X310 doing receive?
On 03/27/2019 03:42 PM, Marcus D. Leech via USRP-users wrote:
On 03/27/2019 03:39 PM, Michael R. Freedman via USRP-users wrote:
Marcus,
I tried a 10MHz LOOffset with no change. I also tried it at
1155.0MHz and 1160.0MHz. At 1155
Hello,
On one USRP I have a thread that does this :
multiUsrp_->set_command_time( startTime, usrpIndex_ );
value = multiUsrp_->get_gpio_attr( "FP0", "READBACK", usrpIndex_ );
multiUsrp_->clear_command_time( usrpIndex_ );
while in another thread I do :
streamCmd.time_spec = uh
9 03:32 PM, Marcus D. Leech via USRP-users wrote:
On 03/27/2019 02:57 PM, Michael R. Freedman via USRP-users wrote:
Hello,
I have a need to have a separate tx_streamer for each channel in
a multi_usrp using timed transmission. I am seeing bizarre results
that at this point I can't e
Marcus,
I tried a 10MHz LOOffset with no change. I also tried it at 1155.0MHz
and 1160.0MHz. At 1155 the phase rolls... at 1160 it does not.
Mike
On 03/27/2019 11:10 AM, Marcus D. Leech via USRP-users wrote:
On 03/27/2019 10:41 AM, Michael R. Freedman via USRP-users wrote:
Any
Hello,
I have a need to have a separate tx_streamer for each channel in a
multi_usrp using timed transmission. I am seeing bizarre results that
at this point I can't explain. I have tried 3.10, 3.13 and the latest
release 3.14 all with different results. I have attached some sample
co
Any thoughts on this?
Mike
On 03/25/2019 01:04 PM, Michael R. Freedman via USRP-users wrote:
Marcus,
190Hz is what we calculated. I have attached a text file with the
data we used. This is a single UBX40 tuned to 155MHz sampling at 2MHz.
Mike
On 03/25/2019 12:34 PM, Nick Foster
attenuator) with both sides set to the same
frequency. Your received signal should look like a sine wave at the
frequency of the offset.
On Mon, Mar 25, 2019 at 9:16 AM Michael R. Freedman via USRP-users
mailto:usrp-users@lists.ettus.com>> wrote:
Hello,
Do you have any sugge
ev of UBX cards?
On Sat, 2019-03-23 at 17:06 -0400, Michael R. Freedman via USRP-users
wrote:
Hello,
I have an issue where I tune both the TX and RX side of a UBX40 card
in
an X310 to the same frequency and find that the transmitted signal
and
what is received are not coherent. I am using an
usly, i.e. with timed commands, random at each tune.
Best regards,
Marcus
On Sat, 2019-03-23 at 17:06 -0400, Michael R. Freedman via USRP-users
wrote:
Hello,
I have an issue where I tune both the TX and RX side of a UBX40
card
in
an X310 to the same frequency and find that the transmitted signa
at 17:06 -0400, Michael R. Freedman via USRP-users
wrote:
Hello,
I have an issue where I tune both the TX and RX side of a UBX40 card
in
an X310 to the same frequency and find that the transmitted signal
and
what is received are not coherent. I am using an external 10MHz
reference and have tried
Hello,
I have an issue where I tune both the TX and RX side of a UBX40 card in
an X310 to the same frequency and find that the transmitted signal and
what is received are not coherent. I am using an external 10MHz
reference and have tried the documented suggestions.
at 150MHz it is coheren
Hello,
I have serveral X310s all with UBX boards up and running with
independent rx_streamers for each channel. I have attempted to get
multiple tx_streamers working in the same way with no success. In
addition, I am having issues picking which channel I want to transmit
on. I am running
u try 3.9.7 LTS? And 3.10.3?
Thanks,
Xavier
On Wed, 20 Mar 2019 at 01:56, Michael R. Freedman via USRP-users
mailto:usrp-users@lists.ettus.com>> wrote:
Hello,
I have multi_usrp setup with many USRPs that are all doing timed
sampling. The sampling intervals need to be as
Hello,
I have multi_usrp setup with many USRPs that are all doing timed
sampling. The sampling intervals need to be as fast as 1ms sampling for
999us. In addition, at the start of the sample window, I need to grab
the state of the GPIO pins on the front panel. I have tried the following :
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