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//
// Copyright 2021 Ettus Research, a National Instruments Brand
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
#pragma once
#include <uhd/types/ranges.hpp>
namespace uhd {
/*! Create a total tune range for multi_usrp objects
*
* Digital tuning can be used to shift the baseband below / past the tunable
* limits of the actual RF front-end. The baseband filter, located on the
* daughterboard, however, limits the useful instantaneous bandwidth. We
* allow the user to tune to the edge of the filter, where the roll-off
* begins. This prevents the user from tuning past the point where less
* than half of the spectrum would be useful.
* Also, we make sure that frequencies don't become negative.
*/
static meta_range_t make_overall_tune_range(
const meta_range_t& fe_range, const meta_range_t& dsp_range, const double bw)
{
meta_range_t range;
for (const range_t& sub_range : fe_range) {
range.push_back(range_t(
std::max(0.0, sub_range.start() + std::max(dsp_range.start(), -bw / 2)),
sub_range.stop() + std::min(dsp_range.stop(), bw / 2),
dsp_range.step()));
}
return range;
}
} // namespace uhd
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