Re: [Discuss-gnuradio] dbs_rx problems?

[Eric Blossom]

On Wed, Sep 28, 2005 at 07:23:21PM +0930, Berndt Josef Wulf wrote:
> G'day,
> 
> I appear to have problems in getting the dbs_rx daughter to work. It may yet 
> be another OS (NetBSD usb device) problem. Hopefully, it won't be hardware! 
> Operation of the tvrx daughter board appears to be fine - receiving signals 
> at around -100dbm sensitivity (is this what can be expected?).
> 
> I'm seeing the following errors when running the dbs_debug.py example:
> 
> barossa: {57} ./dbs_debug.py
> RX d'board A: TV Rx
> RX d'board B: DBS Rx
> usb_control_msg failed: error sending control message: Input/output error
> usb_control_msg failed: error sending control message: Input/output error
> usb_control_msg failed: error sending control message: Input/output error
> usb_control_msg failed: error sending control message: Input/output error

Hi Berndt,

Just to make sure we're really comparing apples-to-apples,
can you disconnect power from your USRP, then swap the DBS_RX and
TV_RX boards, then try again?

Both situations use *exactly* the same mechanism to talk to the
daughterboards.  I can't think of any reason for them to behave
differently regarding USB control messages.

Eric