Possible reasons:

1. Inadequate antenna
2. No line of sight to transmitting ships
3. Incorrect subdevice or antenna specification

--n

On Wed, Mar 4, 2015 at 3:15 AM, Vladimir Musarski <[email protected]>
wrote:

> hello
>
> i'm trying to work with gr-ais gui and after ais_rx runing i have message
> above:
>
> mint@mint ~/src/gr-ais/apps $ ais_rx
>
> linux; GNU C++ version 4.8.2; Boost_105400; UHD_003.008.001-105-g91ae742f
>
>
>
> -- Operating over USB 3.
>
> -- Initialize CODEC control...
>
> -- Initialize Radio control...
>
> -- Performing register loopback test... pass
>
> -- Performing CODEC loopback test... pass
>
> -- Asking for clock rate 32.000000 MHz...
>
> -- Actually got clock rate 32.000000 MHz.
>
> -- Performing timer loopback test... pass
>
> -- Setting master clock rate selection to 'automatic'.
>
> -- Tune Request: 162.000000 MHz
>
> --   The RF LO does not support the requested frequency:
>
> --     Requested LO Frequency: 162.000000 MHz
>
> --     RF LO Result: 162.000000 MHz
>
> --   Attempted to use the DSP to reach the requested frequency:
>
> --     Desired DSP Frequency: -0.000000 MHz
>
> --     DSP Result: -0.000000 MHz
>
> --   Successfully tuned to 162.000000 MHz
>
> --
>
> Tuned to 162.000MHz
>
> Setting gain to 36
>
> Gain is 36
>
> Rate is 250000
>
> Using Volk machine: avx_64_mmx_orc
>
> --------------------
>
> and nothing happened....
>
>
>
> do you have some help/sollution for this?
>
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