Re: [Discuss-gnuradio] only zeros in dual-channel-mode

[wolfgang buesser]

Eric Blossom wrote:
> 
> 
>>         self.rx_r_subdev = usrp.selected_subdev(self.rx, (0,0))
>>         self.rx_r_subdev = usrp.selected_subdev(self.rx, (1,0))
> 
> Looks like a typo here ^  you're setting rx_r_subdev twice
> 
> 

Correct. This is not as in the code I tested.!




> 
> Also, how many LF_RX's do you have?  Two? or are you using one, and
> treating the two inputs as separate channels.  If you're using two,
> then the lines above are OK, otherwise they should be
>   (0, 0)
>   (0, 1)
> 

I do have 2 LF_RX



>> 
>>         self.rx.set_mux(gru.hexint(0xf0f0f0f0)) # expecting to get port A
>> of
>> side A on both channels
> 
> OK, but I'm not sure I see why you'd want to feed the same A/D to both
> DDCs...
> 

Just for testing. I have tried settings like 0xf3f2f1f0 as well.


> 
>>         rrx_r = self.rx.tune(0, self.rx_r_subdev, 10e6+1e3) 
>>         rrx_t = self.rx.tune(0, self.rx_t_subdev,  10e6+1e3) 
> 
> 
> One of these should be tune(1, ...)
> 

O.k.! I fixed that, but with no success.



> Note that in general tune won't work correctly for more than one
> channel. Since you're using LF_RX, you're probably OK.
> 

As I am setting both DDCs to the same freq anyway - should I skip on eof the
tune-statements? 

Here is the entire code:
http://www.nabble.com/file/p14532952/my_both.py my_both.py 


Wolfgang
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