[Discuss-gnuradio] No TX on usrp_nbfm_ptt.py example

[jonathan.mitchener]

Hi all,

Using GnuRadio (3.0) on OSX (10.4.10 Intel) with USRP (RFX400 dau) and
the example apps mostly run fine ... 
But the usrp_nbfm_ptt.py example receives only.  The app suggests that
pressing SpaceBar should enable transmit (I'm trying PMR 446MHz band)
but absolutely nothing happens (either UI or functionally in the h/w)
when I press space.  I am assuming that the UI does something to reflect
that the thing has switched to TX when it works?   Receive from a
suitable handheld PMR set works fine.  Any top level ideas what I am
doing wrong?  
Is there anything about the hardware setup which causes the app to
inhibit TX? 
Are there any jumpers or such that I need to set on the Flex400
daughterboard to allow TX? 

Thanks
Jonathan.
--
--
Jonathan Mitchener 
Futurologist & Principal Research Scientist - Devices
BT Group Chief Technology Office

        e-mail:  address@hidden
        
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