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--- d2:offset_phase_lock_servo [2018/12/05 16:34] – [Table] Michael Radunsky
+++ d2:offset_phase_lock_servo [2019/11/19 18:26] – [Calculating Phase Noise] Michael Radunsky
@@ Line 12: / Line 12: @@
 Please read [[:limited_warranty|Limited Warranty]] and [[:warnings_cautions|General Warnings and Cautions]] prior to operating the D2-135.
-[[d2:quick_start_opls|A quick-start guide]] is available for the D2-135.
+[[d2:quick_start_opls|A quick-start guide]] is available for the D2-135.\\
+[[https://www.vescent.com/products/electronics/d2-135-offset-phase-lock-servo/|D2-135 Web page]]
 =====Description=====
@@ Line 288: / Line 289: @@
 =====Understanding the Transfer Function=====
-The charge pump in the OPLS outputs a signal proportional to the phase-error and the transfer function is as shown in <imgref opls_side_panel>.  However, the OPLS will typically be used to control a //frequency//-tunable device (such as a laser). In this configuration, the effective loop filter is not the one shown in <imgref opls_side_panel>, but includes a extra integration corresponding to converting the phase-error input to a frequency error. Thus, ω<sub>I  </sub>sets the frequency transition from single-integration to double-integration and ω<sub>I</sub> from single-integration to proportional feedback. It is important to understand this 'hidden' integrator when configuring the loop filter parameters.
+The charge pump in the OPLS outputs a signal proportional to the phase-error and the transfer function is as shown in <imgref opls_side_panel>.  However, the OPLS will typically be used to control a //frequency//-tunable device (such as a laser). In this configuration, the effective loop filter is not the one shown in <imgref opls_side_panel>, but includes a extra integration corresponding to converting the phase-error input to a frequency error. Thus, ƒ<sub>I  </sub>sets the frequency transition from single-integration to double-integration and ƒ<sub>I</sub> from single-integration to proportional feedback. It is important to understand this 'hidden' integrator when configuring the loop filter parameters.
 =====Calculating Phase Noise =====
-The phase-noise specified in Section 1.3 is referenced to the phase frequency detector (PFD) at 1 Hz. To convert that to the noise measured on the actual beat-note, it must be rescaled with the following formula:
+The phase-noise specified in the [[d2:offset_phase_lock_servo#specifications|Specifications]] above is referenced to the phase frequency detector (PFD) at 1 Hz. To convert that to the noise measured on the actual beat-note, it must be rescaled with the following formula:
 ''D2-135 Phase-Noise Floor = -213 + 20Log(N) + 10Log(F<sub>REF</sub>)''
-where N is the value of the divider and F<sub>REF</sub> is the reference frequency as measured in Hz. For more details, please see [[http://www.vescent.com/2012/calculating-phase-noise-from-the-d2-135/|http://www.vescent.com/2012/calculating-phase-noise-from-the-d2-135/]] .
+where N is the value of the divider and F<sub>REF</sub> is the reference frequency as measured in Hz. For more details, please see [[http://www.vescent.com/2012/calculating-phase-noise-from-the-d2-135/|Calculating Phase Noise from the D2-135]].
 =====Help =====