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d2:offset_phase_lock_servo [2019/11/20 02:02] – [Modes] Michael Radunsky | d2:offset_phase_lock_servo [2020/03/06 01:51] – [Right Side Panel] Michael Radunsky |
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^ ^^ N=8 ^ N=16 ^ N=32 ^ N=64 ^ | ^ ^^ N=8 ^ N=16 ^ N=32 ^ N=64 ^ |
^ Reference \\ Frequency \\ Setting ^External |250 - 1,920|480 - 3,840|960 - 7,680|1,920 - 10,000| | ^ Reference \\ Frequency \\ Setting ^External |250 - 1,920|480 - 3,840|960 - 7,680|1,920 - 10,000| |
^:::^External Reference Input Frequency |30 - 240|||| | ^:::^External Reference Input Frequency |30 - 240 MHz|||| |
^:::^Internal VCO Low |385 - 850|770 - 1,700|1,540 - 3,400|3,080 - 6,800| | ^:::^Internal VCO Low |385 - 850|770 - 1,700|1,540 - 3,400|3,080 - 6,800| |
^:::^Internal VCO High |770 - 1,700|1,540 - 3,400|3,080 - 6,800|6,160 - 10,000| | ^:::^Internal VCO High |770 - 1,700|1,540 - 3,400|3,080 - 6,800|6,160 - 10,000| |
===Error Signal (AC)=== | ===Error Signal (AC)=== |
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This is an unfiltered version of Error Signal (DC) that is four times smaller, and has a DC offset. When phase locked, the output is 1.6V+2.8<sup>mv</sup>/<sub>deg</sub>*θ, where θ is the phase-error in degrees. When in frequency mode, the output is 1.6V±1V*(1-f<sub>small</sub>/(2 f<sub>big</sub>)). | This is an unfiltered version of Error Signal (DC) that is four times smaller, and has a DC offset. When phase locked, the output is 1.6V+2.8<sup>mV</sup>/<sub>deg</sub>*θ, where θ is the phase-error in degrees. When in frequency mode, the output is 1.6V±1V*(1-f<sub>small</sub>/(2 f<sub>big</sub>)). |
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===Ref Freq=== | ===Ref Freq=== |
**Coarse Gain (eight-position switch)** | **Coarse Gain (eight-position switch)** |
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The COARSE GAIN sets the overall proportional gain of the circuit without changing the location of any corners or poles in the loop filter transfer function. The coarse gain adjusts in steps of 6 dB from 0 dB to -42 dB. | The COARSE GAIN sets the overall proportional gain of the circuit without changing the location of any corners or poles in the loop filter transfer function. The coarse gain adjusts in steps of 6 dB from 0 dB to -76 dB. |
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**Servo Output** | **Servo Output** |
====Right Side Panel ==== | ====Right Side Panel ==== |
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<imgcaption opls_side_panel center|Schematic of the OPLS right-side panel,showing the configurable transfer functino and its user-controls.>{{ :d2:d2-135:d2-135-side-panel-f-for-freq.jpg?nolink&700 |}}</imgcaption> | <imgcaption opls_side_panel center|Schematic of the OPLS right-side panel,showing the configurable transfer function and its user-controls.>{{ :d2:d2-135:d2-135-side-panel-f-for-freq.jpg?nolink&700 |}}</imgcaption> |
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The feedback loop is defined by the Gain vs. Frequency plot shown above. ƒ<sub>I</sub>, ƒ<sub>D</sub> and ƒ<sub>HF</sub> define three corners in the transfer function. ƒ<sub>I</sub> is the frequency where the gain switches from having integral gain to having proportional gain. ƒ<sub>D</sub> is the frequency where the gain switches from proportional to differential. ƒ<sub>HF</sub> is the frequency where the gain begins to fall off at high frequency. ƒ<sub>I</sub>, ƒ<sub>D</sub>, and ƒ<sub>HF</sub> are each controlled by a rotary switch. | The feedback loop is defined by the Gain vs. Frequency plot shown above. ƒ<sub>I</sub>, ƒ<sub>D</sub> and ƒ<sub>HF</sub> define three corners in the transfer function. ƒ<sub>I</sub> is the frequency where the gain switches from having integral gain to having proportional gain. ƒ<sub>D</sub> is the frequency where the gain switches from proportional to differential. ƒ<sub>HF</sub> is the frequency where the gain begins to fall off at high frequency. ƒ<sub>I</sub>, ƒ<sub>D</sub>, and ƒ<sub>HF</sub> are each controlled by a rotary switch. |