... | ... | @@ -46,7 +46,7 @@ In the upper display from the trace below, you can observe a delayed version of |
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The nco_reset_delayed signal was delayed some 70 WR clock cycles (16 ns) after nco_reset was received and sent to the RFNCO. This phase difference between fixed target and lhc protons after 1.2 us was pre-calculated to be around 140 degrees, not the 30 degrees that we observe.
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Its because we only start accumulating differences when rfnco and iqmod start outputting after 744 ns. See an RFNCO and IQMod simulation trace below:
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This discrepancy occurs because we only start accumulating differences when rfnco and iqmod start outputting their calculated signal after 744 ns. See the RFNCO and IQMod simulation trace below:
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![rfnco_latency_sim](uploads/aa7d5e802704c3d2232adc8f86e422ca/rfnco_latency_sim.png)
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