d2:laser_servo
Differences
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| Both sides previous revisionPrevious revision | Next revisionBoth sides next revision | ||
| d2:laser_servo [2018/11/14 17:38] – [Right Side Panel] Michael Radunsky | d2:laser_servo [2018/11/14 17:39] – [Front Panel] Michael Radunsky | ||
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| **Coarse Gain (seven-position switch)** | **Coarse Gain (seven-position switch)** | ||
| - | The COARSE GAIN sets the overall proportional gain of the circuit without changing the location of any zeros or poles in the loop filter transfer function. | + | The COARSE GAIN sets the overall proportional gain of the circuit without changing the location of any corners |
| The overall loop gain (controlled by both the COARSE GAIN and the FINE GAIN) should be set around the point that minimizes the RMS noise on the DC ERROR MONITOR. This can sometimes result in setting the gain too high because the DC ERROR MONITOR filters high frequencies and thus hides some of the gain peaking with high gain. To precisely set the gain, look at the noise with a spectrum analyzer through the AC ERROR MONITOR. | The overall loop gain (controlled by both the COARSE GAIN and the FINE GAIN) should be set around the point that minimizes the RMS noise on the DC ERROR MONITOR. This can sometimes result in setting the gain too high because the DC ERROR MONITOR filters high frequencies and thus hides some of the gain peaking with high gain. To precisely set the gain, look at the noise with a spectrum analyzer through the AC ERROR MONITOR. | ||
d2/laser_servo.txt · Last modified: 2021/12/17 01:58 by 127.0.0.1