On Mon, Jan 26, 2009 at 09:03:32PM -0800, Johnathan Corgan wrote: > On Sun, Jan 25, 2009 at 9:21 PM, Kimminau Jr., Leo F. <addr...@hidden> wrote: > > > Using a PowerMac G5 to control the USRP, if I stop usrp_siggen.py, the USRP > > continues to transmit. Is this expected? > > No. > > > This behavior is different than on a PowerBook G4, where the USRP stops > > transmitting when usrp_siggen.py is stopped. > > Can you elaborate on any other differences between the configurations? > OS version, GNU Radio version, developer tools (GCC, swig, Python), > etc.? > > Thanks > > -Johnathan
I think this is a known problem (not sure there's a ticket on it). I believe that what is happening is that on the faster machine, the Tx pipeline in the FPGA is getting disabled before it has a chance to drain. The result of this is that the pipeline is halted with a non-zero constant value getting clocked into the DACs resulting in a carrier for all daughterboards that contain an LO. Eric The short list is below, full list attached. Is there a way I can track the problem ticket or patch, if any? Leo Kimminau Attached is a full list of ports installed on both PowerMac G5 and PowerBook G4, in summary: Doesn't stop xmt: Stops xmt: PowerMac G5 PowerBook G4 Mac OS X 10.5.6 Mac OS X 10.5.6 Xcode 3.1.2 Xcode 3.0 GNU Radio trunk GNU Radio trunk downloaded 23 Dec 08 downloaded 10 Jan 09 Apple GCC 4.0.1 gcc43 @4.3.2_0 (active) swig @1.3.36_2+perl+ swig @1.3.36_2+perl+php5+python+ruby (active) php5+python+ruby (active) python25 @2.5.4_0+ python25 @2.5.2_7+darwin_9 (active) darwin_9+macosx (active)
PowerMac G5, PowerBook G4 ports installed.pdf
Description: PowerMac G5, PowerBook G4 ports installed.pdf
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