Two RX paths

Hi all guys,

I would like to receive in my application signals from WBX board and
from
LFTX simultaneousely.
At the moment, when I run the flow graph it ends immediately with core
dump, and zero divisin exception.

In the script, sources are defined in this way:

    self.uhd_usrp_source_0 = uhd.usrp_source(
        device_addr="",
        stream_args=uhd.stream_args(
            cpu_format="fc32",
            channels=range(1),
        ),
    )

    self.uhd_usrp_source_0.set_subdev_spec("A:0", 0)
    self.uhd_usrp_source_0.set_samp_rate(samp_rate_wbx)
    self.uhd_usrp_source_0.set_center_freq(433900000, 0)
    self.uhd_usrp_source_0.set_gain(input_gain_slider_wbx, 0)
    self.uhd_usrp_source_0.set_antenna("RX2", 0)

and the second:

    self.uhd_usrp_source_1 = uhd.usrp_source(
        device_addr="",
        stream_args=uhd.stream_args(
            cpu_format="fc32",
            channels=range(1),
        ),
    )

    self.uhd_usrp_source_1.set_subdev_spec("B:A", 0)
    self.uhd_usrp_source_1.set_samp_rate(samp_rate_CC1000)
    self.uhd_usrp_source_1.set_center_freq(freq_CC1000, 0)
    self.uhd_usrp_source_1.set_gain(gain_CC1000, 0)

There are certain posts about using different firmware, but I am not
able
to figure out what should I really do, and is that necessary?

Thanx for help,

Best,

On 12/03/2013 11:10 AM, Nemanja S. wrote:

        device_addr="",
    self.uhd_usrp_source_0.set_antenna("RX2", 0)

Best,


Nemanja Savić


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You need to specify the dual-DDC image for USRP1:

usrp1_fpga_4rx.rbf

http://files.ettus.com/uhd_docs/manual/html/usrp1.html#specify-a-non-standard-image

I see, but still don’t get where this change should be made.
And also, more important, i I have standard configuration with 2 DDCs
and 2
DUCs, then it should work like that, cause I need only 2 DDCs if I am
not
wrong.

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