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comparison rfcal/vcxo-manual/genparams.c @ 184:b8599a1d5813

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fc-vcxo-param: bug in lin_b2 computation
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 13 Apr 2017 04:58:58 +0000
parents 9099a35a705f
children 3eb53be9e667
comparison
equal deleted inserted replaced
183:0518ed1d0dc8 184:b8599a1d5813
58 lin_b = (float)meas[1].freq_offset - lin_a * meas[1].dac_value; 58 lin_b = (float)meas[1].freq_offset - lin_a * meas[1].dac_value;
59 59
60 /* second linear approximation */ 60 /* second linear approximation */
61 lin_a2 = (float)(meas[3].freq_offset - meas[2].freq_offset) / 61 lin_a2 = (float)(meas[3].freq_offset - meas[2].freq_offset) /
62 (float)(meas[3].dac_value - meas[2].dac_value); 62 (float)(meas[3].dac_value - meas[2].dac_value);
63 lin_b2 = (float)meas[3].freq_offset - lin_a * meas[2].dac_value; 63 lin_b2 = (float)meas[3].freq_offset - lin_a2 * meas[3].dac_value;
64 64
65 /* DAC settings */ 65 /* DAC settings */
66 dac_min = (-13500.0f - lin_b) / lin_a; 66 dac_min = (-13500.0f - lin_b) / lin_a;
67 dac_max = (13500.0f - lin_b) / lin_a; 67 dac_max = (13500.0f - lin_b) / lin_a;
68 dac_init = -lin_b2 / lin_a2; 68 dac_init = -lin_b2 / lin_a2;