Re: [USRP-users] X310 with dual TwinRX set up

On 03/10/2021 06:15 PM, Rob Kossler via USRP-users wrote: Hi Oliver, I don't have any example code to provide (and I don't use gnuradio), but I can address a couple of things: - the first step is to get all four channels recognized (as you indicated); perhaps using subdev spec "A:0 A:1 B:0 B:1"

Re: [USRP-users] X300/X310: how to control an external TX/RX switch for 60GHz mm-wave transceiver?

You’ll need to familiarize yourself with this https://files.ettus.com/manual/page_gpio_api.html You should be able to tie a GPIO pin to the ATR state machine in the FPGA to drive a GPIO output signal. Sent from my iPhone > On Mar 10, 2021, at 2:23 PM, SungWon Chung via USRP-users > wrote:

Re: [USRP-users] x300 latency over 10GigE

Hah. Yes. Sorry for the confusion. Sent from my iPhone > On Mar 9, 2021, at 10:36 PM, Doug Blackburn wrote: > >  > Marcus, > > Thanks for your response; I believe I am. The math is spread over two lines: > > uhd::time_spec_t expectedTime = startTime + (double) ( num_tx_samps ) >

Re: [USRP-users] x300 latency over 10GigE

Shouldn’t you be scaling your num_tx_samples by the time per sample when calculating the expectedTime? Sent from my iPhone > On Mar 9, 2021, at 10:03 PM, Doug Blackburn via USRP-users > wrote: > >  > Hello -- > > I've got some questions re: latency with the x300 over the 10GigE interface.

Re: [USRP-users] x310 two UBX daughterboard receiver

On 03/08/2021 01:22 PM, Xiang Ma wrote: I have tried to first use GNURadio to write a program in GRC. And implement my code referring to the generated top_block.py The following code works ``` from gnuradio import uhd def u_source(self): self.source = uhd.usrp_source( device_addr=sel

Re: [USRP-users] Phase synchronization after hopping

On 03/06/2021 11:31 AM, Snehasish Kar via USRP-users wrote: Hello everyone I am trying to achieve frequency hopping in GSM using twinrx with usrp x310. Here I am using timed command for tuning a single port across a given frequency list. During hopping it stays in each frequency for 4msecs a

Re: [USRP-users] very low TX power for burst transmission with B210

My guess is that the startup transient time On the B210 is slightly longer and you’ll need to compensate for that. On average the B210 output power will be perhaps 3-4dB lower than N310. But that should not make much difference at close range. Sent from my iPhone > On Mar 4, 2021, at 5:18 AM,

Re: [USRP-users] B205mini continously transmitting a carrier tone even though UHD crashed

Well assuming it doesn’t crash you can turn down the RF gain and tune it to an out of band frequency. Sent from my iPhone > On Mar 3, 2021, at 9:32 AM, Kelvin Lok wrote: > >  > Thanks Marcus, I realised it might just have been the lo offset. Is there a > way to "turn off" the lo linkage to

Re: [USRP-users] B205mini continously transmitting a carrier tone even though UHD crashed

That’s likely just the TX Lo leakage. I’m guessing it a a lot weaker than when you’re actually transmitting? Sent from my iPhone > On Mar 3, 2021, at 3:42 AM, Kelvin Lok via USRP-users > wrote: > >  > Hi everyone, I am facing an unexpected problem where my B205mini USRP is > continuously t

Re: [USRP-users] MIMO for X3x0 (AN-881 Table 4 may need some edit)

Two X310 plus 4 UBX delivers 4x4 MIMO with an external 1PPS and 10Mhz clock—octoclock or something else. The X310 does have a ref clock output, but I think it is not recommended for use in coherent applications just because of unknown clock skew. Sent from my iPhone > On Feb 27, 2021, at

Re: [USRP-users] USRP N300 - Set RX bandwidth

On 02/25/2021 11:30 AM, Puertas Blanco, Roberto via USRP-users wrote: Hello, I noticed that RX bandwidth is fixed to 100MHz, although the AD9371 datasheet specifies an adjustable range of 8 to 100MHz. Why is this parameter fixed? double magnesium_radio_control_impl::set_rx_bandwidth( c

Re: [USRP-users] Overhead Time for Tuning USRP LO and Acquiring Signal for Swept Spectrum Analysis

It’s likely better to use continuous steaming, and use the tags inserted in the steam to determine applicable frequency. Tune time on the UBX is probably a few milliseconds. But I must emphasize that none of this hardware was optimized for fast frequency hopping. Sent from my iPhone > On

Re: [USRP-users] Read a register

On 02/23/2021 03:45 AM, COURANT Frederique - Contractor wrote: I’m working in python. *De :*COURANT Frederique - Contractor *Envoyé :* mardi 23 février 2021 09:13 *À :* 'Marcus D Leech' *Objet :* RE: [USRP-users] Read a register My USRP platform is the X310. I would like to read an internal

Re: [USRP-users] Read a register

Context here is really important. What USrP platform? Are you talking about a user register or an internal control register in the FPGA implementation? Sent from my iPhone > On Feb 22, 2021, at 10:15 AM, COURANT Frederique - Contractor via USRP-users > wrote: > >  > Hello, > > Could you

Re: [USRP-users] Problem with tx_waveform reference lock

ly adequate in all cases... El vie, 19 feb 2021 a las 17:58, Marcus D. Leech via USRP-users () escribió: On 02/19/2021 12:31 PM, Guillermo Gancio via USRP-users wrote: Dear all, I'm using a B205 as a CW signal generator with the example tx_waveform, in general it works ok, but if I try

Re: [USRP-users] GPSDO fails to lock

levant in this discussion, but I thought I would mention it. >>>>> Rob >>>> The N310 uses one of these modules: >>>> >>>> http://www.jackson-labs.com/index.php/products/lte_lite >>>> >>>> Pretty sure that UHD4.0/UHD3.15 wo

Re: [USRP-users] GPSDO fails to lock

ect the operation of that module, but, you never know. On Fri, Feb 19, 2021 at 9:12 AM Marcus D Leech via USRP-users wrote: Are the antennae situated outdoors? It can take almost an hour to achieve lock from a cold start. Sent from my iPhone On Feb 19, 2021, at 4:14 AM, Johannes Demel wro

Re: [USRP-users] Problem with tx_waveform reference lock

On 02/19/2021 12:31 PM, Guillermo Gancio via USRP-users wrote: Dear all, I'm using a B205 as a CW signal generator with the example tx_waveform, in general it works ok, but if I try to use a 10MHz external reference (option --ref external) I got the error, same issue if I replace the 10MHz with

Re: [USRP-users] microSD Size Limit

I’ve used 32G without any issues. Sent from my iPhone > On Feb 19, 2021, at 11:27 AM, Dennis Trask via USRP-users > wrote: > > What is the largest microSD card supported by the E310? I want to get larger > cards for development purposes, but don't want to buy a size that isn't > supported.

Re: [USRP-users] GPSDO fails to lock

19, 2021 at 9:12 AM Marcus D Leech via USRP-users wrote: Are the antennae situated outdoors? It can take almost an hour to achieve lock from a cold start. Sent from my iPhone On Feb 19, 2021, at 4:14 AM, Johannes Demel wrote: Each USRP has its own GPS antenna. One of those you b

Re: [USRP-users] GPSDO fails to lock

Are the antennae situated outdoors? It can take almost an hour to achieve lock from a cold start. Sent from my iPhone > On Feb 19, 2021, at 4:14 AM, Johannes Demel wrote: > > Each USRP has its own GPS antenna. One of those you buy at ettus.com as a > recommended accessory. > >> On 18.02.21

Re: [USRP-users] x310 two UBX daughterboard receiver

On 02/18/2021 11:47 PM, Xiang Ma wrote: If I want to use slot A as transmitter, slot B as receiver, can I do like this: self.source.set_antenna("RX2", 1) self.sink.set_antenna("TX/RX", 0) You'd need to set the antenna for the receive side in both slots to "RX2": self.source.set_antenna("RX2",

Re: [USRP-users] x310 two UBX daughterboard receiver

On 02/18/2021 10:16 PM, Xiang Ma wrote: Are there any python code for this? I am using the python interface. You'll have to kind of infer what to do from the C++ example--there is no Python version of that example. On Thu, Feb 18, 2021 at 7:44 PM Marcus D Leech mailto:patchvonbr...@gmail.c

Re: [USRP-users] x310 two UBX daughterboard receiver

Well there’s the rx_multi_samples example that is part of the UHD source tree. Sent from my iPhone > On Feb 18, 2021, at 9:32 PM, Xiang Ma wrote: > >  > Do you have any example code? I am still confused. > > Thank you. > >> On Thu, Feb 18, 2021 at 5:50 PM Marcus D Leech >> wrote: >> Jus

Re: [USRP-users] x310 two UBX daughterboard receiver

Just create a 2-channel USRP source and specify a subdev of “A:0 B:0”. Sent from my iPhone > On Feb 18, 2021, at 7:38 PM, Xiang Ma via USRP-users > wrote: > >  > Hi, > > I am using a x310 USRP with two UBX daughterboards. Now I can transmit > and receive the signal in RF A daughterbo

Re: [USRP-users] GPSDO fails to lock

How are you delivering the GPS antenna signal to the USRPs? Via a splitter? Does that splitter provide DC pass-through? Sent from my iPhone > On Feb 18, 2021, at 7:07 AM, Johannes Demel via USRP-users > wrote: > > Just a quick follow-up. The B210 finally got a GPS lock. (I had to wait for

Re: [USRP-users] shared_ptr does not name a template type in Cross-compile of GR 3.7 with UHD 3.15 SDK

This should probably be cross posted to the discuss-gnuradio mailing list just to get some more gnuradio-specific eyes on it. Sent from my iPhone > On Feb 17, 2021, at 2:26 PM, Dennis Trask via USRP-users > wrote: > > I have UHD 3.15 successfully cross-compiled for E310 on Ubuntu 18.04 host

Re: [USRP-users] How to use 2 N310 for TX and RX

On 02/11/2021 05:04 AM, Johannes Demel wrote: Hi, yes, I just attach a grc file for GR 3.9 that I use to test things. It works if I specify `addr=...` or `addr0=...` with one device. If I switch to 2 devices `addr=,addr1=...` it fails. It seems like UHD tries to initialize the devices tw

Re: [USRP-users] Python API install help - Ubuntu 20.04

On 02/11/2021 09:53 AM, Casey Wolsieffer wrote: Actually i got it, for my case it was in export PYTHONPATH="/usr/local/lib/python3/dist-packages/" Semi-new to this so still figuring out some of the stuff that is probably obvious. Will throw this line in ~/.bash_profile Thank you! Some Linux

Re: [USRP-users] Python API install help - Ubuntu 20.04

On 02/11/2021 09:44 AM, Casey Wolsieffer wrote: I did sudo make install yes, I'm assuming you mean /usr/local, I tried that in .conf file but that doesn't seem to work either If you find /usr/local -name "*uhd*" What does that produce? On Thu, Feb 11, 2021, 8:57 AM Marcus D Leech

Re: [USRP-users] Python API install help - Ubuntu 20.04

Your install prefix is /use/local Did you sudo make install? Sent from my iPhone > On Feb 11, 2021, at 8:30 AM, Casey Wolsieffer via USRP-users > wrote: > >  > Hello, I have tried several times to install Python3 uhd on my system but > when I attempt >>>import uhd in python3 environment I

Re: [USRP-users] E310 with v4.0.0.0 Image: Configure Static IP

On 02/10/2021 10:01 AM, Rob Kossler wrote: I don't know about the E310, but on the N310, I found files in /data/network which is where I needed to make changes such as these. Rob Indeed, just programmed a V4.0.0.0 SG1 image onto my E310, and the eth0.network file is in /data/network. This prob

Re: [USRP-users] Ettus USRP B200 mini - FPGA compatibility number

To amplify on a point Rob made. You have to power cycle the B2xx to load a new image into it. Sent from my iPhone > On Feb 10, 2021, at 9:53 AM, Rob Kossler via USRP-users > wrote: > >  > When you run uhd_images_downloader, which version of UHD is shown in the > console? I can see in th

Re: [USRP-users] E310 with v4.0.0.0 Image: Configure Static IP

: [Match] Name=eth0 [Network] Address=192.168.200.2/24 The system seemed to ignore this configuration, however. OK, what does: systemctl |grep -i net Yield? What does: ip link Return? - From: "Marcus D. Leech via USRP-users" To:

Re: [USRP-users] Usrp b210 without duplexer

The maximum power at any receive port should not exceed -15dBm. If you’re doing full duplex into a shared antenna then yes you need to use a duplexor. This isn’t strictly a USRP issue—it’s a generic RF engineering practice that is older than most of us here. Sent from my iPhone > On Feb 9,

Re: [USRP-users] E310 with v4.0.0.0 Image: Configure Static IP

On 02/09/2021 04:35 PM, Dennis Trask via USRP-users wrote: I have re-imaged the SD card for my E310 with the v4.0.0.0 image. I cannot figure out how to set a static IP address on eth0 at boot-up. I created an /etc/network/interfaces file that looks like this: auto eth0 iface eth0 inet static a

Re: [USRP-users] B210 NB-IoT frontend issues

On 02/09/2021 03:48 PM, Luca Lodigiani via USRP-users wrote: Hello, My team and I are doing some experiments with the USRP B210 and NB-IoT waveforms. During tests we have observed a few issues with the RF output, that we would like to understand better, and /hopefully/​ fix or mitigate. I m

Re: [USRP-users] Error Testing UHD Build on E310 with uhd_usrp_probe

On 02/04/2021 12:12 PM, dtra...@tampabay.rr.com wrote: Good info. Thanks. I am attempting to burn a new image to the SD card. I downloaded https://files.ettus.com/binaries/cache/e3xx/meta-ettus-v3.14.1.1/e3xx_e320_sdimg_default-v3.14.1.1.zip which contains usrp_e320_fs.sdimg. Will this work to

Re: [USRP-users] GPSDO and PPS on USRP N300

On 02/04/2021 03:30 AM, Puertas Blanco, Roberto via USRP-users wrote: Hi Marcus, My goal is to get NTP daemon running on N300 synced with GPSDO and PPS. Could it be that the GPSDO time is internally latched with the PPS line? If this is the case then I guess that it would not be necessary to

Re: [USRP-users] Error Testing UHD Build on E310 with uhd_usrp_probe

On 02/02/2021 04:20 PM, dtra...@tampabay.rr.com wrote: From the root directory of the radio, I did: find . -name "ld-linux*" That command produced no results, either. If I am following the instructions at https://kb.ettus.com/Software_Development_on_the_E3xx_USRP_-_Building_RFNoC_UHD_/_GNU_Rad

Re: [USRP-users] GPSDO and PPS on USRP N300

On 02/03/2021 02:31 AM, Puertas Blanco, Roberto via USRP-users wrote: Hello, Is there any way to get the PPS pulse from PS side (ARM) in the USRP N300? I would like to know if the PPS is mapped through the /dev/pps or if it is embedded into GPSDO module. Thanks, Roberto The answer (base

Re: [USRP-users] Error Testing UHD Build on E310 with uhd_usrp_probe

all# which uhd_usrp_probe /home/root/newinstall/usr/bin/uhd_usrp_probe Appreciate the help. Dennis Hmm, see if: /lib/ld-linux-armhf.so.3 Is actually there and executable ----------------- From: "Marcus D. Leech via USRP-users" To: u

Re: [USRP-users] Error Testing UHD Build on E310 with uhd_usrp_probe

/ld-linux-armhf.so.3 Is actually there and executable - From: "Marcus D. Leech via USRP-users" To: usrp-users@lists.ettus.com Cc: Sent: Monday February 1 2021 4:06:23PM Subject: Re: [USRP-users] Error Testing UHD Build on E310 with uhd_usrp_

Re: [USRP-users] DPDK troubles (invalid ELF header loading dpdk library)

ee hugepages reported in hugepages-1048576kB > EAL: Probing VFIO support... > EAL: VFIO support initialized > [ERROR] [DPDK] No available DPDK devices (ports) found! > EAL: FATAL: already called initialization. > EAL: already called initialization. > > >> On Mon, Feb

Re: [USRP-users] DPDK troubles (invalid ELF header loading dpdk library)

On 02/01/2021 06:15 PM, Rob Kossler via USRP-users wrote: Hi, I have 2 systems (each with host PC and N310) for which I'm having similar issues in trying to get DPDK up and running. After going through the UHD Manual DPDK instructions and DPDK app note, I am past the point at which the "dpdk-d

Re: [USRP-users] Error Testing UHD Build on E310 with uhd_usrp_probe

On 02/01/2021 04:01 PM, Dennis Trask via USRP-users wrote: I am attempting to set up a development environment to write software for the E310 by cross-compiling on Ubuntu 18.04. I am using the instructions here: https://kb.ettus.com/Software_Development_on_the_E3xx_USRP_-_Building_RFNoC_UHD_/

Re: [USRP-users] check if GPSDO is locked

On 01/29/2021 11:26 AM, Achilleas Anastasopoulos via USRP-users wrote: HI all, I am looking at an old N210 with a GPSDO and a GPS antenna connected. Is there a uhd script or snippet of code (python) that I can use to probe the USRP and check if it has acquired lock from the GSP? Any help wou

Re: [USRP-users] uhd4.0 and blocks with multiple ports

search/uhd/blob/master/host/include/uhd/rfnoc/blocks/fosphor.yml The GR 3.8 support for this block (and other UHD 4.0 RFNoC blocks) is in gr-ettus: https://github.com/EttusResearch/gr-ettus/blob/master/grc/ettus_rfnoc_fosphor.block.yml Best regards, Aaron On Mon, Jan 25, 2021 at 3:25 PM Marcus D

Re: [USRP-users] uhd4.0 and blocks with multiple ports

This is clearly a question for the discuss-gnuradio mailing list. Sent from my iPhone > On Jan 25, 2021, at 2:43 PM, dario via USRP-users > wrote: > >  > Hi, > I created a block with two output ports and one input port however when i try > to connect it via stream endpoints gnuradio compani

Re: [USRP-users] x3xx schematics incomplete

I believe those pages cover the proprietary PCIE chip made by NI and are omitted deliberately. Sent from my iPhone > On Jan 25, 2021, at 1:29 AM, 张忠山 via USRP-users > wrote: > > x3xx.pdf should have 28 sheets, but only 23 is there. > > sheet 13, 14 15, 16, 17 missing > > Where can I find

Re: [USRP-users] N310 Tuning Two Channels with Two Threads

sults simultaneously. I think you can do it from 1 thread. Rob On Thu, Jan 21, 2021 at 4:01 PM Marcus D. Leech via USRP-users < usrp-users at lists.ettus.com <http://lists.ettus.com>> wrote: > On 01/21/2021 02:56 PM, Glenn Hazelwood via USRP-users wrote: > > I have an N310 and

Re: [USRP-users] N310 Tuning Two Channels with Two Threads

On 01/21/2021 02:56 PM, Glenn Hazelwood via USRP-users wrote: I have an N310 and I wish to scan from 10 MHz to 5910 MHz with two channels. The frontend bandwidth is 100 MHz. So I do 60 tunings overall. I am directly using the UHD 3.15.0.0 C++ API The retune time is typically ~120 ms. My sample

Re: [USRP-users] Overflow / Underflow Questions

On 01/20/2021 05:34 PM, Spam Blocker via USRP-users wrote: We have an application that requires about 640Mbps of transmit and 640Mbps of receive samples bandwidth. We have a high performance Dell laptop hooked to a B205. Questions: 1. Do the different versions of UHD support different thro

Re: [USRP-users] tune speed ussue

constant. > Just a thought, > Cheers, > Dave > > >> On 11/01/2021 13:32, Marcus D Leech via USRP-users wrote: >> This is probably just a quirk of the way the calibrations cache works in the >> AD9361 chip. >> >> The chip isn’t really designed for fast

Re: [USRP-users] Guaranteeing synchronous startup of X310 and N210

That’s not likely to work. Given the different internal architectures of the two devices and different clicking schemes. For one the DDC architecture is different leading to different effective group delays. Sent from my iPhone > On Jan 19, 2021, at 12:33 PM, Manav Kohli via USRP-users >

Re: [USRP-users] Setting E320 to use fixed IP Address on RJ45 eth0

On 01/15/2021 04:06 AM, Mark D via USRP-users wrote: Hi, I’m trying to set an E320 USRP to use a fixed IP address on the RJ45 port. I’ve tried following the instructions in the USRP Manual at https://files.ettus.com/manual/page_usrp_e3xx.html The manual says that settings for the SFP+ port

Re: [USRP-users] B210 TX from file of complex samples

On 01/15/2021 02:27 AM, Hai Nguyen via USRP-users wrote: Hello, I'm trying to transmit complex samples (e.g. BPSK chips) using B210 and GNUradio. My flowgraph is very simple: A file source connected to a USRP sink (cpu format fc64), sample rate is 1e6. However the USRP seems not to transmit a

Re: [USRP-users] E312 Battery Question

As long as it had power it will run fine without the battery as far as I know. Sent from my iPhone > On Jan 14, 2021, at 12:20 PM, David Scott via USRP-users > wrote: > >  > Hi all, > > > > I need to carry out some development and testing with the USRP E312 for work > in the lab. However

Re: [USRP-users] Changing the transmitted samples per packet

https://files.ettus.com/manual/structuhd_1_1stream__args__t.html Sent from my iPhone > On Jan 13, 2021, at 11:51 AM, Ephraim Moges via USRP-users > wrote: > >  > Good morning, > > Is their a simple command like tx_streamer.get_max_num_samps that sets the > maximum number samples per packet

Re: [USRP-users] USRP sample rate and bandwidth

On 01/13/2021 01:08 AM, Koyel Das (Vehere) via USRP-users wrote: Hi, The USRP sample rate and bandwidth are two different parameters in gnuradio so if I want 20 MHz bandwidth and 100 MSps sample rate then will setting bandwidth = 20 MHz and sample rate = 100 MHz serve my purpose? Normally sam

Re: [USRP-users] Spectrum analyzer not picking received signal from USRP-GNU Radio

Your description is insufficient in detail for anyone to give you any advice at all. The USRP does not transmit from It’s RX2 input, so I’m not sure what you expect to see on your spectrum analyzer. You haven’t said exactly how and what you’re transmitting—what tools and applications, nor h

Re: [USRP-users] UHD_STREAM_MODE_NUM_SAMPS_AND_DONE

On 01/11/2021 10:11 AM, Андрей А via USRP-users wrote: Hello Is threre need set num_samps field in uhd_stream_cmd_t when stream_mode = UHD_STREAM_MODE_NUM_SAMPS_AND_DONE and stream_now = true? Thank you. Yes, I believe so. ___ USRP-users mailing

Re: [USRP-users] tune speed ussue

This is probably just a quirk of the way the calibrations cache works in the AD9361 chip. The chip isn’t really designed for fast frequency hopping, and when you retune, internal recalibrations need to happen on the chip, except for small frequency changes. Sent from my iPhone > On Jan 11,

Re: [USRP-users] Transmit underruns

On 01/09/2021 03:50 PM, Barry Duggan via USRP-users wrote: Hi Ron, Thank you for your test flowgraph. It works fine when using the wav file, BUT when I change to an Audio Source block (mic) I get the underruns. So I still have the problem. I've experimented with various sizes of 'send_buff_si

Re: [USRP-users] X310/UBX as a monostatic transceiver (e.g. RFID reader)?

Indeed, a 900Mhz duplexor with a 400Khz split is an extreme challenge. If the TX and RX really do need to operate at the same time on more or less the same frequency, then you have some plumbing to do for sure. Sent from my iPhone > On Jan 5, 2021, at 12:07 AM, Marcus D Leech wrote: > > To

Re: [USRP-users] X310/UBX as a monostatic transceiver (e.g. RFID reader)?

To do a little expectation-setting, the narrowband MDS of a modern, not that spectacular, UHF RX chain of better than -140dBm is not that unusual. So when I talk about a sensitive RX chain, I’m talking about those sorts of levels. In that kind of context, -24dBm seems deafeningly loud, and -80dB

Re: [USRP-users] X310/UBX as a monostatic transceiver (e.g. RFID reader)?

If the TX and RX frequencies are a few 100kHz different then what you want is a duplexor arrangement where the TX frequency is strongly attenuated ahead of the RX. This is how repeaters work when multicoipled to a single antenna. The TX frequency is often attenuated 90dB in the RX path. Se

Re: [USRP-users] X310/UBX as a monostatic transceiver (e.g. RFID reader)?

On 01/04/2021 12:25 PM, Lukas Haase wrote: In an RFID system, the RX is *designed* to be up-close-and-snugly with the other ends TX. There's NO reason to have an input stage that is sensitive in the usual RF sense. So, completely different engineering goals than in a typical RF system. I

Re: [USRP-users] X310/UBX as a monostatic transceiver (e.g. RFID reader)?

On 01/03/2021 07:17 PM, Lukas Haase via USRP-users wrote: Hi, I would like to use an X310 with UBX in a monostatic antenna configuration (same frequency range). This is for example common in RFID readers. My transmit power is 30dBm (ZHL-25W-272+ after the USRP), fed into a 6dBi antenna. Now

Re: [USRP-users] Hacking E310 units for synchronization

UHD has always been a very generic device API—necessarily so due to the large variety of hardware types in the USRP “line up”. Having said that there’s nothing that prevents you from diving into the code on both the software and FPGA side to create and expose whatever you want. Sent from my i

Re: [USRP-users] implementation of member functions in gnuradio blocks

On 01/02/2021 08:55 PM, Linda20071 via USRP-users wrote: I installed gnuradio from source via "gitclone" command. Thus, I would assume all the source files should be in my computer. However, I am able to find mpsk_receiver_cc.h, but not its implementation: mpsk

Re: [USRP-users] Hacking E310 units for synchronization

On 01/02/2021 02:44 AM, Ofer Saferman via USRP-users wrote: Hello, I must say that I am a bit frustrated. When I purchased multiple E310 units it was with the hope I will be able to synchronize them mainly based on: https://kb.ettus.com/Synchronization_and_MIMO_Capability_with_USRP_Devices, i

Re: [USRP-users] USRP B210 UHD library installation issue

On 12/31/2020 04:49 PM, Ashutosh Singh wrote: Hi Marcus, I tried tha as well but i think adding PPA repo is the onlY way to go (many UHD dependencies get solved by adding PPA repo and because of that some issues won't occur LATER while running the binary. Issues occurring about uhd library sha

Re: [USRP-users] USRP B210 UHD library installation issue

On 12/30/2020 03:54 PM, Ashutosh Singh wrote: Any update over it !! I'll point out that unless you need the latest UHD, Ubuntu 18.04 (Bionic) packages UHD already-- sudo apt-get install libuhd* Should do the trick without requiring the PPA. ___

Re: [USRP-users] USRP B210 UHD library installation issue

Ettus R&D are aware of the issue. But it being Christmas break there likely won’t be any action for a couple of days. Sent from my iPhone > On Dec 30, 2020, at 3:54 PM, Ashutosh Singh > wrote: > >  > Any update over it !! > >> On Tue, Dec 29, 2020 at 6:28

Re: [USRP-users] DMA FIFO latency with X310

Dear lord. The calculator on my iPhone only goes to 1e8 in portrait mode. I had not noticed, so I slipped a decimal place. Doh!! Sent from my iPhone > On Dec 30, 2020, at 11:48 AM, EJ Kreinar wrote: > >  > Simple math is not working out for me today-- Maybe it's the holidays?? > > I think a

Re: [USRP-users] DMA FIFO latency with X310

Simple math. A 9000 *byte* packet is 72000 *bits* At 1.0e9 *bits/sec* that’s a latency of 720usec Sent from my iPhone > On Dec 30, 2020, at 8:55 AM, Jorge Arroyo Giganto via USRP-users > wrote: > >  > Hi EJ, > > Yes, I tried replacing the DMA FIFO with a normal FIFO and the latency got

Re: [USRP-users] USRP B210 UHD library installation issue

On 12/29/2020 12:18 PM, Ashutosh Singh via USRP-users wrote: Hi , I am trying to install the UHD libraries using binaries provided by Ettus research following below page: USRP Hardware Driver and USRP Manual: Binary Installation (ettus.com)

Re: [USRP-users] Where is GNU Radio Live SDR Environment ISO?

On 12/24/2020 03:52 AM, Mattei Rinaldo via USRP-users wrote: Hi to All, please someone kind enough to give me the link to download the GNU Radio Live SDR Environment ISO. I have a N210 with GPS and I can't get it to work. The ping is there but always "UHD device not found". Maybe with this IS

Re: [USRP-users] Synchronization of E310 units

You can use the external SYNC input to feed in a common 1PPS signal. Then set your time source to “external”. I suspect you’ll only do a little better than the two independent GPS receivers. Sent from my iPhone > On Dec 23, 2020, at 4:50 PM, Ofer Saferman via USRP-users > wrote: > >  >

Re: [USRP-users] Connection problems

It’s clearly not an N210 if you’re getting LIBUsB errors. Perhaps it’s a B210? This sounds like insufficient power being supplied by your USB controller. Try an external power supply if it’s a B210. Sent from my iPhone > On Dec 21, 2020, at 6:50 AM, Philipp Schach via USRP-users > wrote: >

Re: [USRP-users] B210 USRP TX Spectrum Channel Differences

On 12/14/2020 09:44 AM, Nieland, Michael via USRP-users wrote: Dear all, we are using two B210 USRP’s to generate and receive DQPSK Signals at 1.53 GHz (two TX and two RX channels). The USRP’s use FW Version 8.0 and FPGA Version 16.0 (Hardware Revision 4). We found that there are quite sign

Re: [USRP-users] LO phase alignment for multiple B200s

On 12/14/2020 10:19 AM, Bach Nguyen via USRP-users wrote: Hi all, I was using my 2 B200s to measure the magnitude and phase difference in voltage gain of two signal chains on-site and I notice that there is a random phase offset between the 2 inputs. I read the USRP Manual on Device Synchroni

Re: [USRP-users] Problem with x310 io error

What type of Ethernet connextion are you using? What type of PC? Does your Ethernet card have an 82579LM controller chip? Are you running under a VM or on the physical hardware? Sent from my iPhone > On Dec 12, 2020, at 11:19 PM, Basse Ang via USRP-users > wrote: > > Hi > > Just have an

Re: [USRP-users] UBX160 TX "noise figure"?

I think you’d mentioned you have a spectrum analyzer. What does it have to say about the SNR of your signal? Sent from my iPhone > On Dec 8, 2020, at 2:41 PM, Lukas Haase via USRP-users > wrote: > >  > Hi Marino, > > Thank you for confirming the -139dBm/Hz. Indeed, with my sampling rate of

Re: [USRP-users] UBX160 TX "noise figure"?

On 12/06/2020 08:33 PM, Lukas Haase wrote: Hi Marcus, Thanks again! I did now the following experiment: I connected TX to RX back-to-back with 46.43dB attenuation in between. I set TX gain and RX gain to 20dB and transmit a single CW at -3dBFS. This means my output power is *Pout=11.44dBm* (cro

Re: [USRP-users] USRP B200 Function Question

Similarly it’s easy to get B2xx working with a super cheap SBC like the rPi boards or Odroids etc. Sent from my iPhone > On Dec 7, 2020, at 2:16 PM, Rob Kossler via USRP-users > wrote: > >  > Mark, > Just this past Friday, I had success controlling a B200mini directly from an > N310 using

Re: [USRP-users] USRP B200 Function Question

I’ve never had much luck with USB over Ethernet devices with either USRP1 or B2xx Sent from my iPhone > On Dec 7, 2020, at 1:56 PM, Mark McAllister via USRP-users > wrote: > >  > My senior design team at California State University Northridge is current > using a USRP N210 as a local osc

Re: [USRP-users] b210 and x310 synchronisation from non-GPSDO external clock

On 12/07/2020 11:24 AM, BERTOLINI Rodolphe via USRP-users wrote: Dear all, I put both mailing list (OAI and USRP) because both may have something to do with my problem. I apologize if it is not appropriate. I would like to synchronize a b210 and an x310 using a square signal generated by a fu

Re: [USRP-users] Using GPS disciplining on E310

On 12/04/2020 03:46 PM, Rob Kossler via USRP-users wrote: Hi Ofer, Here is my understanding - The E310 can sync to a PPS signal (either external input or obtained from GPS). From this PPS, the E310 derives the 10MHz ref signal and uses that as ref for LO signal. So, there will be lots of phas

Re: [USRP-users] Questions regarding tx_waveforms

Try reducing the baseband signal magnitude and RF gain—does that reduce the unwanted harmonic content? What offset value are you using? I typically use a value that is a bit more than half my application bandwidth. Some Amount of unwanted mixing and distortion products are *inevitable* with an

Re: [USRP-users] GNURADIO doesn't find USRP B205

On 11/30/2020 01:27 PM, Jens Hoffmann wrote: uhd_images_downloader output: Again, you have TWO UHD library installations.The version that Gnu Radio is linked against is 3.13, whereas your uhd tools, like uhd_usrp_probe are apparently 3.15. My *guess* is that you installed Gnu Radio fro

Re: [USRP-users] UBX160 TX "noise figure"?

On 11/30/2020 01:54 PM, Lukas Haase wrote: Hi Marcus, That makes sense, thanks. Would you be willing to confirm if what I am doing here is correct? To first order, the DAC has an SNR of 98dB (16 bit). Then I use Fries' equation to get the NF of the following stages (for the filter and the atten

Re: [USRP-users] UBX160 TX "noise figure"?

The output SNR will be utterly dominated by the inherent DAC noise. There’s a good article here: https://www.analog.com/media/en/training-seminars/tutorials/MT-001.pdf Sent from my iPhone > On Nov 30, 2020, at 4:03 AM, Lukas Haase via USRP-users > wrote: > > Hello, > > Does anyone know wh

Re: [USRP-users] Fwd: E310: Change MAC Address?

I have a query In to Ettus engineering on this. I can’t find any documentation on changing the MAC. The u-boot environment thinks of the MAC address as precious and once it is set, it won’t let you change it or delete it. Presumably a fresh image from the download site has code that sets the

Re: [USRP-users] Fwd: E310: Change MAC Address?

Near as I can tell the e310 gets its MAC from the motherboard i2c eeprom. Sent from my iPhone > On Nov 25, 2020, at 12:55 PM, Andrew Payne via USRP-users > wrote: > >  > So does the U-Boot environment determine the MAC address of eth0 prior to > booting the kernel? Or is it during the make

Re: [USRP-users] Carrier frequency jumps on E310

On 11/24/2020 02:38 PM, Luke Whittlesey wrote: I'm in the process, but it's a lengthy process. There is something messed up with the C API in 3.15, so it doesn't work for me as a simple drop in replacement. Would it be wise to try to jump straight to 4.0? The jump to 4.0 might be more traumatic.

Re: [USRP-users] Carrier frequency jumps on E310

R&D suggest updating to a UHD 3.15 environment first. Sent from my iPhone > On Nov 24, 2020, at 1:54 PM, Luke Whittlesey > wrote: > > I'm seeing this on two E310s that are a few years old. I just swapped > the sd card into a brand-new E310 and I am NOT seeing the frequency > jumps. So, same

Re: [USRP-users] Carrier frequency jumps on E310

Try at lower and higher frequencies—are the jumps the same or proportional to frequency? Sent from my iPhone > On Nov 24, 2020, at 11:27 AM, Luke Whittlesey via USRP-users > wrote: > > On the E310 I'm seeing discrete jumps in the carrier. The carrier will > intermittently jump around in step

Re: [USRP-users] X310 UBX digital tune not occurring?

K, thanks for doing the test. >> >> I wonder if you have a precise signal generator so you can confirm >> that >> the RX side is on-frequency? >> >> >>> >>> On Wed, 2020-11-18 at 20:05 -0500, Marcus D. Leech wrote: >>>> On 11/18/

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