[Discuss-gnuradio] Two Tx channels, one motherboard (N200+LFTX)

[khalid.el-darymli]

Hi,

Is it possible to use two separate Tx channels (A:A A:B with two different center frequencies) for the N200 with the LFTX daughterboard?

I tried to do this on the Rx side and it seems to work just fine. However, on the Tx side, I am getting the following error message:

    

line 97, in __init__

    self.uhd_usrp_sink_0.set_subdev_spec("A:A A:B", 0)

  File "/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/uhd_swig.py", line 3447, in set_subdev_spec

    return _uhd_swig.usrp_sink_sptr_set_subdev_spec(self, *args, **kwargs)

RuntimeError: ValueError: The subdevice specification "A:A A:B" is too long.

The user specified 2 channels, but there are only 1 tx dsps on mboard 0.

Thanks.

Best regards,

Khalid