Re: how to use 2 usrp b210 to receive synchronously

thanks Marcus and Gwen. so i need to add the python source rather than config on the gnuradio block? From: discuss-gnuradio-bounces+james.jordan.999=hotmail@gnu.org on behalf of Marcus D. Leech Sent: Tuesday, May 30, 2023 9:53 PM To:

Re: how to use 2 usrp b210 to receive synchronously

b210 to receive synchronously Dear James, you can't; uhd::multi_usrp only supports a single B210 per instance. You need to use two USRP source blocks. Best regards, Marcus On 5/30/23 12:34, james jordan wrote: > Hi all, > i have 2 usrp b210 and i want to make 4 channel rx system.

how to use 2 usrp b210 to receive synchronously

Hi all, i have 2 usrp b210 and i want to make 4 channel rx system. i make a uhd source and config mboard num 2 and channel count 4. but when i run the programme it says "RuntimeError: LookupError: IndexError: multi_usrp: RX channel 2 out of range for configured RX frontends" so how to set the

Re: how to generate a certain band width white noise

y, March 21, 2021 5:17 PM To: james jordan <mailto:james.jordan@hotmail.com>; GNURadio Discussion List <mailto:discuss-gnuradio@gnu.org> Subject: Re: how to generate a certain band width white noise Hello Jordan: Just use a "Noise Source" block and a resampler b

Re: how to generate a certain band width white noise

_dtd raise XMLSyntaxError(parser.error_log) XMLSyntaxError: /home/w/Downloads/whitenoise.grc:1:1:FATAL:PARSER:ERR_DOCUMENT_EMPTY: Start tag expected, '<' not found what is the gnuradio version for this grc? <http://aka.ms/weboutlook> From: james j

Re: how to generate a certain band width white noise

Hi Kyeong, thanks for your reply. what is the default bandwidth for noise source. from my understanding resampler did not modify bandwidth. <http://aka.ms/weboutlook> From: Kyeong Su Shin Sent: Sunday, March 21, 2021 5:17 PM To: james jordan ; GN

how to generate a certain band width white noise

Hi, i want to use white noise to test a certain band. such as 2Mhz band width white noise. how to do this?

about psk implement

Hi All, i want to implement psk transceiver in C. i don't understand the python code that gnuradio implement psk. for the transmitter i only need to map the bits data to psk constellation to get i/q sample. but for receiver because of the phase error between receiver and transmitter should i

hwo to convert 3.8 GRC to 3.7

hi, i have an grc that making using gnuradio 3.8 but my gnuradio is 3.7. install a new version seems difficult for me. so is there any way to convert the grc to 3.7

how to use gnuradio make tdd similar transceiver

Hi all, i want to use gnuradio to make a transceiver like tdd that is when transmit stop receive when transmit finish start receive. i am using usrp. if using C++ it is not difficult to achieve this but i want to use gnuradio to have a chart flow to show this clear to student.

Re: how to insert if...else logic between 2 blocks

4.12.20 um 14:18 schrieb james jordan: > Hi Fabian, > thanks for your quick reply. i think python block is a good choice but > how to define the block param as what i want? i only see there is a > example param in the block. when i modify the code as below > def __init__(self, center_fr

Re: how to insert if...else logic between 2 blocks

://wiki.gnuradio.org/index.php/Python_Module 3) Build your own module: https://wiki.gnuradio.org/index.php/OutOfTreeModules Best regards, Fabian Am 04.12.20 um 10:36 schrieb james jordan: > Hi ALL, > i want to compute process a block's output then pass the result to > another block's in

how to insert if...else logic between 2 blocks

Hi ALL, i want to compute process a block's output then pass the result to another block's input. the process is not a fix equation but like this if(output > a)... else... so is there any way to do this without making a new block by myself. can i modify the generated python code to insert this

Re: how to auto detect peak frequency in QT FFT sink

i need to add the if...else logic between the output of fft peak and the gui number sink. From: Discuss-gnuradio on behalf of james jordan Sent: Thursday, December 3, 2020 6:17 PM To: Kyle A Logue ; discuss-gnuradio@gnu.org Subject: Re: how to auto detect

Re: how to auto detect peak frequency in QT FFT sink

and the frequency band to the block which seems defined in the xml file? <http://aka.ms/weboutlook> From: Kyle A Logue Sent: Wednesday, December 2, 2020 12:48 AM To: james jordan ; discuss-gnuradio@gnu.org Subject: Re: how to auto detect peak frequency in

Re: how to auto detect peak frequency in QT FFT sink

Hi Kyle, is there any document for how to use the block in gr-fhss-utils especially for fft peak block. what is the two output of fft peak? <http://aka.ms/weboutlook> From: Kyle A Logue Sent: Friday, November 20, 2020 12:26 AM To: james jordan ; d

Re: how to auto detect peak frequency in QT FFT sink

Hi Kyle, Thanks. my cmake version is too low so i can not build gr-fhss. i try to use fft->max but how to store max result to a gui label? <http://aka.ms/weboutlook> From: Kyle A Logue Sent: Thursday, November 19, 2020 4:05 AM To: james jordan

how to auto detect peak frequency in QT FFT sink

Hi all, i want to see the fft of the signal and also want to detect the peak frequency if there is a peak signal. how to achieve this?

where can i find gnuradio uhd example?

Hi, i am using usrp with gnuradio. i want to find some example of this to know more about the usage of every module of gnuradio.

[Discuss-gnuradio] Low cost SDR compatible with openbts and gnuradio

Hi list, I want to introduce an sdr which compatible with openbts and gnuradio. the sdr have one tx and one rx in a sigle board. Use usb to connect to computer. the price is 450$ per unit. Regards ___ Discuss-gnuradio mailing list

[Discuss-gnuradio] Any one know rfx board i q imbalance value

Hi list, Anyone know rfx board i q phase imbalance value and amplititude imbalance value, I do not have equiment to measure these value. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] dc offset is different from unit to unit

specific questions. Best Regards John Malsbury On 6/1/2012 8:57 PM, James Jordan wrote: Hi list, I need to compensate usrp dc offset. but the dc offset is different from unit to unit. so do I need to calibrate each unit dc offset or there is a universal value that work for each unit

[Discuss-gnuradio] dc offset is different from unit to unit

Hi list, I need to compensate usrp dc offset. but the dc offset is different from unit to unit. so do I need to calibrate each unit dc offset or there is a universal value that work for each unit? Regards ___ Discuss-gnuradio mailing list

[Discuss-gnuradio] Is there halfband filter implementation in gnuradio

Hi list, I need to use halfband filter in my grc project. but I can not find halfband filter implement in gnuradio. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] UHD fpga code compile error

Hi all, I compile uhd fpga code meet a lot of errors. I use quartus II 9.1 web edition. I directly open the fpga project file(EttusResearch-UHD-Mirror-81e891f\fpga\usrp1\toplevel\usrp_std\usrp_std.qpf) then choose menu Processing-start compilation then meet a lot of errors. I think the errors

Re: [Discuss-gnuradio] UHD fpga code compile error

this change should be added to the git repo. On Fri, Apr 8, 2011 at 12:05 AM, Josh Blum j...@ettus.com wrote: On 04/07/2011 03:28 AM, James Jordan wrote: Hi all, I compile uhd fpga code meet a lot of errors. I use quartus II 9.1 web edition. I directly open the fpga project file

[Discuss-gnuradio] how to retrieve the baseband signal strengh

Hi all I use xlating filter to retrieve the baseband signal and I use such way the compute the samples signal strengh like this: a = sqrt(i * i + q * q) (i and q means the complex signal's real part and image part) then compute the average signal strengh: rssi = (sum of all sample strengh) /

Re: [Discuss-gnuradio] where to get burn-db-eeprom source code

yeah thanks. I didn't notice it is python file for it do not have extension .py On Tue, Mar 15, 2011 at 11:25 AM, John Orlando j...@epiq-solutions.comwrote: On Mon, Mar 14, 2011 at 9:50 PM, James Jordan james.jordan@gmail.com wrote: Hi all, any one know where to get burn-db-eeprom source

[Discuss-gnuradio] where to get burn-db-eeprom source code

Hi all, any one know where to get burn-db-eeprom source code? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] where to get burn-db-eeprom source code

Hi all, any one know where to get burn-db-eeprom source code? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] why in low_pass cutoff_freq is CENTER of transition band whereas in low_pass_2 cutoff_freq is BEGINNING of transition band

The low_pass and low_pass_2 logic are almost the same. I can't see any different usage of cutoff_freq in this two function. So why the parameter cutoff_freq have different meaning in this two function. Thanks! ___ Discuss-gnuradio mailing list

[Discuss-gnuradio] question about xlating filter and resample filter

Hi all, I use xlating filter get baseband data from a wide band signal, but the xlating result sample rate is not what I want, so I need to use resample to convert the signal to the sample rate what I want. I find gr_rational_resampler_base_ccc also need a filter(tap). I already filter the

Re: [Discuss-gnuradio] hi all, can I use one RX receive a wideband signal and then seperate it to many narrowband signals

, James Jordan james.jordan@gmail.com wrote: Thanks Tom. if I really don't know how pfb_channelizer_ccf and pfb_decimator_ccf do, but they seem use the same principle. And how to set the taps? Yes, they are based on the same principle, but the decimator just extracts the 1 channel

Re: [Discuss-gnuradio] hi all, can I use one RX receive a wideband signal and then seperate it to many narrowband signals

Marcus, Thanks for reply. That is make sense, so the point become how to convert the signal to baseband. On Fri, Jan 21, 2011 at 11:11 AM, Marcus D. Leech mle...@ripnet.com wrote: On 01/20/2011 09:42 PM, James Jordan wrote: Hi Tom, This is very old topic. I have read a DSP book. But I find

Re: [Discuss-gnuradio] Yet another kick at the cheap-hardware can

Hi Marcus, In your design there is only a single RX. I think it is better to build an expandable board which can expand 2 RX 3 RX... That will only introduce a little more cost but will meet much more people's need. On Thu, Jan 20, 2011 at 11:39 AM, James Jordan james.jordan@gmail.comwrote

[Discuss-gnuradio] some question about channelizer

Hi all, what does oversample_rate means in pfb_channelizer_ccf and what is it for? I see in channelizer implement it use FFT to despin the output data. What is despin? Thanks ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org

Re: [Discuss-gnuradio] how to make 8 bits sample works

I have fix the problem which is my application bug. On Fri, Jan 7, 2011 at 4:55 AM, Nick Foster n...@ettus.com wrote: On Thu, 2011-01-06 at 15:08 +0800, James Jordan wrote: Hi all, I want to let my application work on 8 bit sample mode. I have test and checked that 8 bit resolution sample

[Discuss-gnuradio] why use 8 bits sample is not as accurate as use 16 bits sample shift right 8 bits then shift left 8bits?

why use 8 bits sample is not as accurate as use 16 bits sample shift right 8 bits then shift left 8bits? I use 8 bits sample and the process do not work fine, then I change to 16 bits sample and shift sampled data right 8 bits ( which must the same logic in usrp hardware to sample 8 bits data )

[Discuss-gnuradio] how to make 8 bits sample works

Hi all, I want to let my application work on 8 bit sample mode. I have test and checked that 8 bit resolution sample can meet my application's accurate need. I test my application that run it on 16 bit sample and shift the read data right 8 bits then shift left 8 bits. My application works fine.

[Discuss-gnuradio] can inband_2rxhb_2tx.rbf use 8 bits sample?

Hi all, I want to use 8 bits sample. I use inband_2rxhb_2tx.rbf firmware. I use set_format( ) set data format as width 8 bits and shift 8 bits and the return true. But when I read data the data still 16 bits format. I do not use gr stuff to read data, however I directly read data. If I use 16 bits

[Discuss-gnuradio] Re: [Openbts-discuss] how openbts set channel bandwidth?

, Dec 28, 2010 at 09:19, James Jordan james.jordan@gmail.com wrote: Hi all, I learned that RFX board do not have channel filter. And it capture signal with bandwith 20MHz, but gsm channel is 200Khz, and I can not see any place to set a filter or something like that to get 200KHz

Re: [Discuss-gnuradio] can I set bandwidth for rfx1800 board

Thanks. On Tue, Dec 28, 2010 at 11:43 AM, Marcus D. Leech mle...@ripnet.com wrote: On 12/27/2010 10:31 PM, James Jordan wrote: Thanks. So RFX board always capture a 20MHz bandwidth signal? But applications use RFX board such as openbts need only 200Khz bandwidth signal, why it can

Re: [Discuss-gnuradio] Re: [Openbts-discuss] how openbts set channel bandwidth?

Marcus, Thanks. I am dsp idiot, I thought decimation is only set the sample rate before. Didn't know it also set up a filter. On Wed, Dec 29, 2010 at 2:17 PM, Marcus D. Leech mle...@ripnet.com wrote: On 12/28/2010 09:14 PM, James Jordan wrote: Hi Marcus, Thanks for reply. If set

[Discuss-gnuradio] can I set bandwidth for rfx1800 board

Hi all, I check gnuradio code found set_bw( ) is not implemented in db_flexrf_900_rx_mimo_b. So can I set bandwidth for rfx1800 board? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] hi all, can I use one RX receive a wideband signal and then seperate it to many narrowband signals

Thanks Tom. if I really don't know how pfb_channelizer_ccf and pfb_decimator_ccf do, but they seem use the same principle. And how to set the taps? On Thu, Dec 23, 2010 at 2:49 PM, Tom Rondeau trondeau1...@gmail.com wrote: On Thu, Dec 23, 2010 at 1:19 AM, James Jordan james.jordan

Re: [Discuss-gnuradio] hi all, can I use one RX receive a wideband signal and then seperate it to many narrowband signals

Tom, thank u very much. On Thu, Dec 23, 2010 at 10:16 PM, Tom Rondeau trondeau1...@gmail.comwrote: On Thu, Dec 23, 2010 at 3:53 AM, James Jordan james.jordan@gmail.com wrote: Thanks Tom. if I really don't know how pfb_channelizer_ccf and pfb_decimator_ccf do, but they seem use

Re: [Discuss-gnuradio] hi all, can I use one RX receive a wideband signal and then seperate it to many narrowband signals

fftw to do my work. On Tue, Dec 21, 2010 at 6:19 PM, Martin Braun martin.br...@kit.edu wrote: On Tue, Dec 21, 2010 at 06:02:44PM +0800, James Jordan wrote: Hi all, I need to receive many narrowband signals, but usrp hard ware only provide 4 RX, so I need to receive more than one narrowband

[Discuss-gnuradio] hi all, can I use one RX receive a wideband signal and then seperate it to many narrowband signals

Hi all, I need to receive many narrowband signals, but usrp hard ware only provide 4 RX, so I need to receive more than one narrowband signals per RX. Is my idea possible? I dont want to use more than one usrp to achieve that, anyway which will be an option if my first idea can't work.