Re: [Discuss-gnuradio] Harmonics of the sampling freqeuncy

2010-08-20 Thread John Orlando
On Fri, Aug 20, 2010 at 9:03 AM, devin kelly wrote: > Hello, > > I'm doing a spectrum sensing project and I'm testing both the USRP 1 > and USRP 2.  So far, I've modified usrp_scectrum_sense.py to do use > the USRP2 with the WBX > > Right now I'm doing this is what I'm doing with what gr_bin_stati

Re: [Discuss-gnuradio] Comparison test results: new "2" series dqpsk blocks

2010-08-20 Thread ikjtel
--- On Fri, 8/20/10, Tom Rondeau wrote: > the polyphase > filterbank approach will perform better than both. This > suggests > either an error in the parameters you chose or a bug in the > code. Many thanks for the update. A third possibility (albeit perhaps more remote?) - the signal is PI/4

Re: [Discuss-gnuradio] Peak detector block does not really work. It need to be fixed

2010-08-20 Thread Tom Rondeau
On Thu, Aug 12, 2010 at 8:26 AM, Phong Do wrote: > > Hello, > > I'm working now with peak_detector block and find out that some functions > don't really work. > I've used the following 2 blocks: > > - Peak Detector (gr_peak_detector): the parameter "look ahead" seems have no > function. I gave "lo

Re: [Discuss-gnuradio] Comparison test results: new "2" series dqpsk blocks

2010-08-20 Thread Tom Rondeau
On Thu, Aug 12, 2010 at 1:47 PM, ikjtel wrote: > I've run a comparison test of >  - the "old" GR dqpsk block >  - the "new" one (dqpsk2) >  - the "op25" cqpsk (Gardner/Costas) block > > The resulting constellation diagrams are viewable at > http://www.lightlink.com/mhp/qpsk2/ > > The results are:

Re: [Discuss-gnuradio] Can USRP2 be used to provide power to the preamplifier?

2010-08-20 Thread Jason Abele
On Fri, Aug 20, 2010 at 2:52 AM, Amee Shah wrote: > Hello all, > > Currently, I have the following hardware setup: > > Receive Antenna --> Preamplifier --> RF In (USRP2 + DBSRX) > > I was wondering if  I could use USRP2 to supply power (12- 14V) to the > preamplifier? If yes, can someone tell me h

Re: [Discuss-gnuradio] Switching to "next" branch

2010-08-20 Thread Josh Blum
You have won an RTFM! http://ettus-apps.sourcerepo.com/redmine/ettus/projects/uhd/wiki#Gnuradio-UHD -Josh On 08/20/2010 01:16 PM, Marcus D. Leech wrote: OK, so my GIT fu is weak. HOw do I switch to the "next" branch so that I can pick up the gr-uhd stuff. Assuming that I have a current trun

[Discuss-gnuradio] Switching to "next" branch

2010-08-20 Thread Marcus D. Leech
OK, so my GIT fu is weak. HOw do I switch to the "next" branch so that I can pick up the gr-uhd stuff. Assuming that I have a current trunk spinning on my local disk, what do I do? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http

Re: [Discuss-gnuradio] BURX 26MHz clock

2010-08-20 Thread John Orlando
On Fri, Aug 20, 2010 at 8:47 AM, David Evans wrote: > Thanks John, > > This is how I understood it, but I suppose my real question is (not being a > dsp > expert), why would you want to do this? For a system with only a single USRP2 in it, there isn't much benefit to having phase lock between th

Re: [Discuss-gnuradio] how to get dqpsk2 block?

2010-08-20 Thread Eric Blossom
On Fri, Aug 20, 2010 at 12:56:30AM -0700, Thunder87 wrote: > > Somehow managed to install git and get gnuradio source. Now I have a problem > with source installation. "sudo ./configure" says: > > The following components were skipped either because you asked not > to build them or they didn't pa

Re: [Discuss-gnuradio] BURX 26MHz clock

2010-08-20 Thread David Evans
Thanks John, This is how I understood it, but I suppose my real question is (not being a dsp expert), why would you want to do this? I assumed that being a 26MHz clock, this would be ideal for GSM rate signals? Cheers, Dave - Original Message From: John Orlando To: David Evans C

[Discuss-gnuradio] Can USRP2 be used to provide power to the preamplifier?

2010-08-20 Thread Amee Shah
Hello all, Currently, I have the following hardware setup: Receive Antenna --> Preamplifier --> RF In (USRP2 + DBSRX) I was wondering if I could use USRP2 to supply power (12- 14V) to the preamplifier? If yes, can someone tell me how? Thanks and best regards, Amee _

Re: [Discuss-gnuradio] Receiver gain setting of XCVR2450 in UHD code

2010-08-20 Thread Josh Blum
Controlling gains individually from the api is on my TODO list. :-) Internally, they are all separated, but the set_xx_gain(...) calls into this gain_group object that sets the codec + dboard gains as a whole. See lib/utils/gain_group.cpp Also give uhd_usrp_probe a run to see the various contr

Re: [Discuss-gnuradio] how to get dqpsk2 block?

2010-08-20 Thread Mark J. Blair
On Aug 20, 2010, at 12:56 AM, Thunder87 wrote: > Somehow managed to install git and get gnuradio source. Now I have a problem > with source installation. "sudo ./configure" says: > > The following components were skipped either because you asked not > to build them or they didn't pass configurati

Re: [Discuss-gnuradio] how to get dqpsk2 block?

2010-08-20 Thread Thunder87
Somehow managed to install git and get gnuradio source. Now I have a problem with source installation. "sudo ./configure" says: The following components were skipped either because you asked not to build them or they didn't pass configuration checks: gruel gcell gnuradio-core usrp usrp2 gr-usrp

Re: [Discuss-gnuradio] Receiver gain setting of XCVR2450 in UHD code

2010-08-20 Thread Christoph Thein
Am 20.08.2010 08:45, schrieb Per Zetterberg: Hi Josh and List, In the data-sheet of the MAX2829 circuit two receiver gains are specified "Receiver Front-End Gain-Control Settings" and "Receiver Baseband VGA Gain Settings". From the UHD API we only have one gain parameter. I have been searching