[Discuss-gnuradio] USRP seems to work...but

[Anastasopoulos Achilleas]

Dear all,

After updating my FC3 and reinstalling the
latest tarballs I think I have a distribution with a
working USRP module (with Basic Rx,Tx and 4937 daughterboards).
Thanks for the comments/suggestions.

However there are still some issues that I have not resolved:

benchmark_usb.py works fine and gives me a max of 32MBps rate.
It also gives a warning:
usrp_standard_rx::set_decim_rate: WARNING rates > 128 result in incorrect
gain.
How should I interpret this?

Also, some of the examples in usrp import the module as

"from gnuradio import usrp"

but in the code they use

"usrp_tx = usrp1.sink_s (0, tx_interp)"

The way I fixed this is to import usrp1 explicitely
"from gnuradio import usrp1"
Is this the right way to fix this problem?
I would expect that
"from gnuradio import usrp"
also import all versions of usrp, ie, 0 and 1
Any thoughts on this one?

Also, wfm_rcv.py and wfm_rcv_gui.py
seem to be different in the way they access the RF front end:
the former does it explicitely (and gives me errors)
while the latter has this part commented out.
I do not get any errors when I run the
wfm_rcv_gui.py script, but I do not receive any
FM stations either (my 4937 daughterboard is sitting on board B).

This is the output I get when running ./wfm_rcv_gui.py 97.1

RX d'board A: Basic Rx
RX d'board B: TV Rx
usrp_standard_rx::set_decim_rate: WARNING rates > 128 result in incorrect
gain.

All windows open with data, but I only hear noise...same for any other
frequency I tested.
I wonder if the file included in the tarballs is obsolete...

Thanks
Achilleas