Revision 94e7cec6
| b/host/lib/usrp/dboard/db_rfx.cpp | ||
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| 241 | 241 |
/*********************************************************************** |
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* Gain Handling |
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**********************************************************************/ |
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static float rx_pga0_gain_to_dac_volts(float &gain){
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static float rx_pga0_gain_to_dac_volts(float &gain, float range){
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//voltage level constants (negative slope) |
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static const float max_volts = float(.2), min_volts = float(1.2); |
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static const float slope = (max_volts-min_volts)/45;
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static const float slope = (max_volts-min_volts)/(range);
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//calculate the voltage for the aux dac |
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float dac_volts = std::clip<float>(gain*slope + min_volts, max_volts, min_volts); |
| ... | ... | |
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void rfx_xcvr::set_rx_gain(float gain, const std::string &name){
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assert_has(_rx_gain_ranges.keys(), name, "rfx rx gain name"); |
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if(name == "PGA0"){
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float dac_volts = rx_pga0_gain_to_dac_volts(gain); |
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float dac_volts = rx_pga0_gain_to_dac_volts(gain, |
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(_rx_gain_ranges["PGA0"].max - _rx_gain_ranges["PGA0"].min)); |
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_rx_gains[name] = gain; |
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//write the new voltage to the aux dac |
Also available in: Unified diff