LimeSDR switching to RX2_L antenna, soapy "nchan=2" argument

ncg · November 17, 2020, 10:50pm

Has anyone successfully switched LimeSDR receive to RX2 antennas? Normal LNAL/LNAW/LANH switching works but how to access the second channel?
I generally assumed SATNOGS_DEV_ARGS (Radio device arguments) should be “nchan=2” to end up with something like this:

“soapy=0,driver=lime,nchan=2”

Still, I seem to lack something as RX2 antenna ports are not activated, anyone can comment further?

Reference was from:

github.com

osmocom/gr-osmosdr/blob/master/lib/arg_helpers.h#L142


  }
}

arg_list.erase( std::remove_if( // remove any global nchan tokens
                  arg_list.begin(),
                  arg_list.end(),
                  is_nchan_argument() ),
                arg_list.end() );

// try to parse device specific nchan values, assume 1 channel if none given

for (std::string arg : arg_list)
{
  dict_t dict = params_to_dict(arg);
  if (dict.count("nchan"))
  {
    dev_nchan += boost::lexical_cast<size_t>( dict["nchan"] );
  }
  else // no channels given via args
  {
    dev_nchan++; // assume one channel



Regards,
NCG