Re: [Discuss-gnuradio] GNU Radio Companion USRP Transmitter Example

[Isaac Gerg]

Thanks Josh,
  Its the end of the work day here.. so i am going to take off.  I will 
try it first thing.  The GRC I am using is from the trunk so ill just 
recheck it tommorrow.  I am using the basic Tx and basic Rx.

Isaac

Josh Blum wrote:
> I just checked in an two tone loopback example to the grc trunk. The 
> setup that I just tested it on is a usrp with basic rx and basic tx, 
> with txa and rxa connected together.
>
> Could you post what daughter boards that you are using. You will have to 
> use the grc trunk to use the above example.
>
> -Josh
>
> isaacgerg wrote:
>
> > No luck.  Can you send me an example xml schema for a transmitter that 
> > you
> > know works?
> >
> > Thanks in advanced,
> > Isaac
> >
> > Josh Blum wrote:
> >
> > > isaacgerg wrote:
> > >
> > > > Does anyone have an .xml file that shows an example of doing this? 
> > > > Currently, I have a USRP sink with the following parameters and I 
> > > > cant get
> > > > any signals on my Rx USRP.  I know my Rx USRP is working as I can 
> > > > run the
> > > > gnuradio ptt example and I can see energy appearing on the PSD.
> > > >
> > > > Here are my USRP Sink parameters:
> > > > Input type: complex
> > > > usint #: 0
> > > > subdev spec: side B
> > > > freq: 25000000
> > > > gain 3200
> > > > mux 0x0
> > > > auto t/r : ignore
> > > > tx enable: enable
> > > > interp: 400
> > > >
> > > > The input to the sink is a cosine wave at 10000 with amplitude 100.
> > > >
> > > > Thanks in advance.
> > >
> > >
> > > Im not sure about the board you are using, but the actual allowed 
> > > gain parameter is way less than 3200. Set the usrp gain to 0, and try 
> > > a amplitude of 5000 for the signal source.
> > >
> > > -Josh

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