diff options
| -rw-r--r-- | host/lib/usrp/cores/rx_dsp_core_200.cpp | 5 | ||||
| -rw-r--r-- | host/lib/usrp/cores/tx_dsp_core_200.cpp | 5 |
2 files changed, 6 insertions, 4 deletions
diff --git a/host/lib/usrp/cores/rx_dsp_core_200.cpp b/host/lib/usrp/cores/rx_dsp_core_200.cpp index 7af4923c8..ef6b85de9 100644 --- a/host/lib/usrp/cores/rx_dsp_core_200.cpp +++ b/host/lib/usrp/cores/rx_dsp_core_200.cpp @@ -203,9 +203,10 @@ public: } void update_scalar(void){ - const double target_scalar = (1 << 17)*_scaling_adjustment/_dsp_extra_scaling; + const double factor = 1.0 + std::max(ceil_log2(_scaling_adjustment), 0.0); + const double target_scalar = (1 << 17)*_scaling_adjustment/_dsp_extra_scaling/factor; const boost::int32_t actual_scalar = boost::math::iround(target_scalar); - _fxpt_scalar_correction = target_scalar/actual_scalar; //should be small + _fxpt_scalar_correction = target_scalar/actual_scalar*factor; //should be small _iface->poke32(REG_DSP_RX_SCALE_IQ, actual_scalar); } diff --git a/host/lib/usrp/cores/tx_dsp_core_200.cpp b/host/lib/usrp/cores/tx_dsp_core_200.cpp index c37868b26..808f13028 100644 --- a/host/lib/usrp/cores/tx_dsp_core_200.cpp +++ b/host/lib/usrp/cores/tx_dsp_core_200.cpp @@ -145,9 +145,10 @@ public: } void update_scalar(void){ - const double target_scalar = (1 << 17)*_scaling_adjustment/_dsp_extra_scaling; + const double factor = 1.0 + std::max(ceil_log2(_scaling_adjustment), 0.0); + const double target_scalar = (1 << 17)*_scaling_adjustment/_dsp_extra_scaling/factor; const boost::int32_t actual_scalar = boost::math::iround(target_scalar); - _fxpt_scalar_correction = target_scalar/actual_scalar; //should be small + _fxpt_scalar_correction = target_scalar/actual_scalar*factor; //should be small _iface->poke32(REG_DSP_TX_SCALE_IQ, actual_scalar); } |