Alias help


I have a quick question/favor to ask fellow GNU Radio-ers. I am trying
allow aliasing into my USRP2 system that is equipped with an RFX-2400.
Therefore, I am trying to get the FPGA code from gr-bluetooth running on
USRP2 but am running into some trouble. Using u2_flash_tool, I am able
flash the SD card with the desired gr-bluetooth FPGA code
(u2_rev3_alias.bin). But, I can never see the USRP2 via find_usrps or
usrp2_probe. I am currently running Ubuntu 10.04 (Lucid Lynx) with the
binary package installation, and have also tried Ubuntu 9.04 (Jaunty
Jackelope) with the same results. I would like to test the FPGA code
earlier versions of GNU Radio (e.g. 3.2), but I do not really trust
to ‘downgrade’ without messing all sorts of things up (I’m a bit of a
noob). So, I’m wondering if someone with an earlier install (or an easy
way/method to downgrade) could possibly tell me if the aliasing FPGA
works with earlier versions of GNU Radio (or even if it works with the
binary package install and I am just doing something really silly). So,
would greatly appreciate it if anyone familiar with flashing the SD card
could grab the u2_rev3_alias.bin FPGA file from:

After extracting gr-bluetooth-0.4.tar.gz, the desired file will be in
bin directory:

Then the following flash command can be used:
sudo u2_flash_tool --dev=/dev/XXXX -t fpga -w u2_rev3_alias.bin
(of course being very careful to properly select XXXX - mine is sdb)
(also, I would first copy the existing fpga file to hard disk with the

Finally running find_usrps or usrp2_probe would tell whether or not the
USRP2 is actually seen.

Thanks a ton to anyone willing to help me out on this:)

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