[Discuss-gnuradio] USRP2 slave PPS signal over the MIMO cable

I would like to run two USRP2's as master and slave, and I would like to only use a 1PPS on the master (each USRP2 would be controlled by two separate processes). When I run the test_pps_input on the slave, the program fails. However, the master is able to find the PPS just fine. I've tried a

Re: [Discuss-gnuradio] Simulink and USRP

On Tue, May 24, 2011 at 3:57 PM, Camden Mendiola cmendi...@its.bldrdoc.govwrote: Hi, Doe the USRP2 require specific FPGA and firmware contents to interface with simulink? When I turn on the USRP2 with the SD card in, all 6 leds flash and then D and F stay on. Does this mean my SD card is

Re: [Discuss-gnuradio] USRP2 UART use

On Tue, Oct 19, 2010 at 9:39 PM, Josh Blum j...@joshknows.com wrote: On 10/19/2010 06:14 PM, b...@sigmatix.com wrote: We're exploring the possibility of monitoring the overrun/underrun status via the USRP2 UART. FYI, the USRP2 under UHD reports underflows as async messages to the host

Re: [Discuss-gnuradio] Re: TX/RX simultaneously using one USRP board

is distorted (choppy in the time domain) so in short...can I transmit asyncronous data using interleave? thanks for any help, David Scaperoth ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss

Re: [Discuss-gnuradio] updated packet format on USRP inband signaling

clarification that you can give, David Scaperoth On Feb 25, 2007, at 6:56 PM, Eric Blossom wrote: Would those of you with an interest in USRP inband signaling, please take a look at the latest proposed packet format. Now's a good time to change things ;) It's in trunk/usrp/doc/inband-signaling

Re: [Discuss-gnuradio] updated packet format on USRP inband signaling

that time went backwards...sorry about that =) Thanks for any clarification that you can give, I hope this helped! THANKS ERIC! you've cleared up alot of things for me! David Scaperoth ___ Discuss-gnuradio mailing list Discuss-gnuradio

Re: [Discuss-gnuradio] The shortest pulse length

On Feb 28, 2007, at 4:29 AM, seph 004 wrote: Well, I have implemented a bit of a strange setup which seems to be working somewhat now. I'm not really trying to view only the first few samples, I'm currently trying to track where I might of made a mistake with trying to generate a defined

Re: [Discuss-gnuradio] Which hardware shall i use to implement this SDR?

On 3/1/07, bhargav b [EMAIL PROTECTED] wrote: Hi! I am a software radio enthusiast and am a beginner.I have started reading the codebut i want some guidance as how to proceed. have you played with the examples in the GNU Radio trunk? /gnuradio-examples/... That's the best place to

Re: [Discuss-gnuradio] The shortest pulse length

On 3/1/07, seph 004 [EMAIL PROTECTED] wrote: This is what I did: def build_graph (): nchan = 1 interp = 512 duc0 = 0 duc1 = 0 fs = 250e3#2nd sample rate between usb and dac max_dev = 32e3 #1st sample

Re: [Discuss-gnuradio] RFX400 Antenna Connection

what is the receive PGA set to? I find it works best at the midpoint (35 or so). you may want to simply scale back your transmit power with a multiplier block: gr.multiply_const_cc(0.1) I don't know exactly what the correct amount of attenuation is, but 40dB sounds like enough (you'll

Re: [Discuss-gnuradio] Simultaneous RX/TX using RFX2400 Boards.

On Mar 7, 2007, at 1:47 PM, Tarun Tiwari wrote: Hi, I have written a code for simultaneous TX/RX for RFX2400 as followed below: self.rx = usrp.source_c (0,self.decim) self.tx = usrp.sink_c (0, self.interp) . . . fg = my_graph() . . . fg.subdev.set_enable(True) # Enable transmitter

Re: [Discuss-gnuradio] CPFSK

On Mar 8, 2007, at 11:31 PM, Andrew Buck wrote: Hi, I'm trying to demodulate and decode a CPFSK signal generated by a non-gnuradio source. I'm new to gnuradio and RF in general. I know that GMSK is a form of CPFSK, so I started by trying that, but I haven't had success. I noticed that the

Re: [Discuss-gnuradio] Simultaneous RX/TX using RFX2400 Boards.

On Mar 9, 2007, at 1:44 AM, Tarun Tiwari wrote: Hi David, Thank you for you reply. On 3/7/07, David Scaperoth [EMAIL PROTECTED] wrote: From your description above, you are transmitting whatever you receive (is this true?). Yes, its true and I am interested in transmitting the amplified

Re: [Discuss-gnuradio] MATLAB/Windows and the USRP

I've just recently been using TCP socket connections to send data to/ from MATLAB. you could use file_descriptor_sink[source] block in GNU Radio to push data to/from the USRP. The sockets I have been using are at http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?

[Discuss-gnuradio] CPM timing recovery

hey all, I am trying to demodulate a CPM (for now I'm doing it with 4-CPFSK signal with Raised Cosine pusle shaping) signal without knowing the symbol rate ( i.e. the samples per symbol). does anyone know if this is possible? Papers that I have read on timing recovery for CPM assume that the

Re: [Discuss-gnuradio] CPM timing recovery

BTW, are you using the cpm.py hierarchical block that is on the trunk? If yes, I attach a simple python code that demonstrates the spectral line generation for a 4-CPFSK with h=1/2. I definitely see the spectral lines for your case, which I believe is considered an MSK modulation.

Re: [Discuss-gnuradio] CPM timing recovery

On 6/7/07, Achilleas Anastasopoulos [EMAIL PROTECTED] wrote: David, as I explained in my earlier email, the power you have to raise your signal is not always 2. If h = 1/4 you need to raise your signal to the power 4. In general ig h=N/D, you raise it to D. dang it... good call...thanks

Re: [Discuss-gnuradio] Several basic questions

On Jun 11, 2007, at 3:54 AM, Teun wrote: Hi Guys, I tried searching the forum, but I still got some problems which I don't fully understand. To my knowledge, the receiving ADC Rate is 64 MSamples/second, at a granuality of 14 bits/sample. This would make it possible to have a total

Re: [Discuss-gnuradio] Storing A/D samples in memory.........

On Jul 18, 2007, at 4:53 PM, Kshitij Kumar Singh wrote: As a part of some research work on cooperative communications in wireless networks, I had decided to use the USRP as one the of my implementation platforms. I used the tutorials by D. Shen as a reference. There are, however , some

Re: [Discuss-gnuradio] NCO-CORDIC Problem

in the USRP...is this the wrong value to use here? Is there anyway that this DDC resolution could be modified...perhaps within the FPGA code?? Any suggestions would be appreciated. Thanks. david scaperoth On Wed, Dec 07, 2005 at 02:51:58AM -0500, Blue Sky wrote: I am trying to build a AM

Re: [Discuss-gnuradio] TX/RX simultaneously using one USRP board

Hey dawei,I just recently played with the idea of a repeater (receive on frequency and transmit on another).  ALthough I have personally only used the TvRx and Basic Tx, the concept is basically the same (I would imagine) for the FLEX400.  I haven't pushed the data rates, but for narrowband FM, it

Re: [Discuss-gnuradio] TX/RX simultaneously using one USRP board

No reason... ; ) I just put together two old scripts that I had lying around to see if it would work. My ultimate goal is to receive, demod and change the modulation, and then retransmit, so that's probably what I was thinking about... hope this clears things up! David Scaperoth

[Discuss-gnuradio] Auto T/R switching

so, I left out an important part of my e-mail...dang it...ignore the previous e-mail ; )I was looking through the gmsk2 code and I stumbled across this line of code in the transmit_path.py file:self.set_auto_tr(True) #enable Auto T/R switchingI wasn't sure I understood what exactly that was

[Discuss-gnuradio] selecting frequency for different daughterboards

)...and on some level that's correct...for these daughter boards. Why not just 0-44MHz (which I think is the range)? any help would be most appreciated. thanks david scaperoth ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http

Re: [Discuss-gnuradio] Latency with B200-mini / Ack Messages for Transmit

See below for some thoughts/questions. Good luck. If you want to optimize the b200 transport latency you need a simpler setup On Apr 15, 2016 3:52 AM, "murat tas" wrote: > > Hi, > > I have a use case similar to the one mentioned in this series of posts: >

Re: Teething problems with new GNU Radio 3.9 installation

Brendan, Out of curiosity, what versions of tensorflow and cuda are you using? David On Thu, Apr 22, 2021, 12:50 AM Brendan Horsfield < brendan.horsfi...@vectalabs.com> wrote: > Hi Ryan, > > I have some good news to report. > > While I was waiting for your reply (the curse of living Down