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Name | PV | Description | ||||||||||||
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I, Q |
| Detector readbacks in I and Q components. To regard the response as a complex number, compute
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Magnitude |
| Magnitude of the detector response and converted to dB, relative to overflow at magnitude = 1.0. | ||||||||||||
Phase | :PLL:FILT:PHASE | Phase of the detector response. | ||||||||||||
Debug | Links to the Tune PLL Debug for a detailed view of the detector response. | |||||||||||||
:PLL:DEBUG:ENABLE_S | This PV indicates whether the debug readbacks are enabled. This readback is normally not required, and the extra processing load can usefully be avoided by leaving this disabled when not required. | |||||||||||||
Mag rel std | :PLL:DEBUG:RSTD_ABS, :PLL:DEBUG:RSTD_ABS_DB | "Magnitude relative standard deviation". This pair of fields and "IQ rel std" below are an attempt to capture the quality of signal and lock as a single number. This number should be small if there is a strong detector signal, but is not affected by the quality of the lock. Given a debug IQ waveform
The
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IQ rel std | :PLL:DEBUG:RSTD, :PLL:DEBUG:RSTD_DB | "IQ relative standard deviation". This is intended to capture the quality of the PLL lock as a single number: this number should be small if there is little deviation in angle. Give waveform
Again,
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