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七郎 / Seven Liu

科学与艺术,恰如人生中的红颜知己。 本博内容保留所有权利.

 
 
 

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About Optimization 关于最佳化 (参数说明书节选)  

2012-05-23 12:01:21|  分类: 读点英文 |  标签: |举报 |字号 订阅

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2.4.9 Adjustable Parameter 可调参数

A maximum of nine measurement conditions can be adjusted in a Bottom Jitter measurement to reach the minimum jitter value conditions. 在测试Bottom Jiiter时,最多可对九种测量条件进行调整以获取Jitter值为最小的测试条件。Possibly set the measurement order, variation, steps of an adjustable parameter, and whether to use the adjustable parameter or not as needed to derive the measurement conditions of the minimum jitter value. 设定可调参数的测定顺序,变量和步骤,以及根据需要决定是否使用可调参数来确定获得最小jitter值的测定条件。


Adjustable Parameter

可调参数

Description

说明

Slice 切片

djusts the Slice Level for binarizing the SUM signal. 设定将整个信号进行二值化处理的切片电平

Expander 伸展器

Adjusts the Lenses(Expanders) up and down in the PUH. 调整光头内的透镜组(伸展器),使之向上或向下。

The Spherical Aberration is calibrated simultaneously. 同时对球面像差进行了校准。

Focus offset 聚焦补偿

Adjusts the Defocus Amount by driving a focus coil and adding an offset. 通过驱动聚焦线圈并施加偏移量来调整散焦量。

Track offset 跟踪补偿

Adjusts the Untracked Amount by driving a tracking coil and adding an offset. 通过驱动聚焦线圈并施加偏移量来调整轨道跟踪偏移。

Focus gain 聚焦增益

Inputs the disturbance signal and automatically adjusts the optimum gain in the Focus Servo Circuit. 输入干扰信号兵自动调整聚焦伺服电路中的最佳增益。

※Adjusting amount cannot be specified. 无法规定调整量

Track gain 跟踪增益

Inputs the disturbance signal and automatically adjusts the optimum gain in the Tracking Servo Circuit. 输入干扰信号兵自动调整跟踪伺服电路中的最佳增益。

※Adjusting amount cannot be specified. 无法规定调整量

Radial tilt 径向倾斜

Adjusts the Radial Tilt of the PUH.调整光头的径向倾斜角度。

Tangential tilt切向倾斜

Adjusts the Tangential Tilt of the PUH.调整激光头的切向倾斜角度

Limit EQ 限度均衡器

Adjusts the gain of the Limit Equalizer Circuit in the range of ±0.4[dB] . 在±0.4dB范围内调整限度均衡器的增益。

※Adjusting amount cannot be specified. 无法规定调整量

The adjustable parameters have the upper and lower limit values and the steps of an adjustable parameter set for each adjustment items, and the jitter in the direction of the lower limit and the jitter in the direction of the upper limit are measured with the current standard settings as the reference point. 可调参数有上下限度,每个调整项目都有对应的可调参数,在参数上限和下限方向的jitter值按现行标准进行测量别设为参考点。

The optimum parameter is calculated from the measured jitter value. 最佳参数由jitter测量值计算而得。Several parameters may affect the servo systems such as tracking servos. 有些参数会对伺服系统,如跟踪伺服,产生影响。If an extreme adjustable parameter is set, the servo might come off.若可调参数达到临界点,可能会导致伺服失败。Therefore, if the sampled jitter value exceeds 15%, cancel any further condition adjustments and proceed to the following procedure. 因此,如果取样的Jitter值超过了15%,对余下条件的调整将被取消,转而进行下列步骤。(If measuring toward the upper limit, measure toward the lower limit. 如果测试方向为上限,将转向下限。If measuring toward the lower limit, measure the following adjustable parameter or the following measurement item.)如果测试方向为下限,将测试下列可调参数或转为对测试项目进行测试。


 

① Start from the current standard settings of the adjustable parameter. 从可调参数的当前标准设定开始。

② Adjust the parameters toward the lower limit, and then measure the jitter value,将参数向下限方向调整.并测试Jitter值。

③ Cancel the adjustments toward the lower limit, if the jitter value exceeds the jitter limit of 15%. 如果Jitter值超过15%的限度,取消下限方向的调整。

④ Measure a jitter value toward the upper limit, as in ② & ③. 像步骤② 和 ③一样测试上限方向的Jitter值。

⑤ Calculate the best parameter of the minimum jitter value (lower jitter value) by using the least-squares method from the jitter value within the jitter limit. 用最小二乘法从限度以内的Jiiter值中计算Jiiter值最小时的最好参数。

Adjustable Parameter Setting Range可调参数设定范围

The minimum value (lower jitter value) is calculated with the least-squares method from the jitter value retrieved by adjusting the measurement conditions.使用最小二乘法计算通过调整测试条件而获得的Jiiter值,从而得到Jitter最小时的可调参数值。However, the correct calculation may not be able to be performed due to the transition of the adjustable parameter and/or jitter value to be assigned to the least-squares method. 但是,修正计算可能无法进行,原因是:可调参数和/或Jiiter值之间的转换被指定使用最小二乘法。


① Normal adjustable parameter setting range 普通可调参数之设定范围

If the range of the lower and upper limit values of the adjustable parameter is set properly, the jitter transition graph of the ideal “U-shaped curve” can be measured and the minimum value (lower jitter value) of the least-squares method can be calculated with high accuracy. 如果可调参数上下限度之间的范围得到正确设定,在测试中将得到一个完美的U形曲线的Jitter转化图,而且使用最小二乘法计算得到的最小Jitter值所对应的可调参数值将非常精确。


 


② Lower limit or upper limit insufficient settings 上限或下限设定不足

If the upper limit and/or lower limit of adjustable parameter is insufficient, the “\ curve” and “/ curve” jitter transition graphs can be measured. 如果可调参数的上限和/或下限设定不足,将得到“\”形或“/”形的转化曲线。However, calculation of the minimum value using the least-squares method will not be possible. 这样,将无法使用最小二乘法来计算最小Jiiter值时的可调参数。In this case, the minimum jitter is the end jitter value near the upper and/or lower limit. 在这种情况下,Jitter最小值就是接近上限或下限时最后测得的那个值。


③ Upper limit and lower limit insufficient settings 上限和下限设定不足

If the adjustable parameter upper limit and lower limit are insufficient, the jitter transition graph with scarcely changed jitter value can be measured. 如果可调参数的上限或下限不足,Jitter转化图上的Jitter值几乎保持不变。However, calculation of the minimum value using the least-squares method will not be possible. 这样,将无法使用最小二乘法来计算最小Jiiter值时的可调参数。In this case, the minimum jitter is the minimum value of the measured jitter value.在此情况下,最小Jitter值就是测定值。


② Lower limit or upper limit insufficient settings 上限或下限设定不足



If the upper limit and/or lower limit of adjustable parameter is insufficient, the “\ curve” and “/ curve” jitter transition graphs can be measured. 如果可调参数的上限和/或下限设定不足,将得到“\”形或“/”形的转化曲线。However, calculation of the minimum value using the least-squares method will not be possible. 这样,将无法使用最小二乘法来计算最小Jiiter值时的可调参数。In this case, the minimum jitter is the end jitter value near the upper and/or lower limit. 在这种情况下,Jitter最小值就是接近上限或下限时最后测得的那个值。


③ Upper limit and lower limit insufficient settings 上限和下限设定不足

If the adjustable parameter upper limit and lower limit are insufficient, the jitter transition graph with scarcely changed jitter value can be measured. 如果可调参数的上限和下限设定不足,测试结果将会是Jitter转换图上的Jiiter值几乎没有变化。However, calculation of the minimum value using the least-squares method will not be possible. 这样,将无法使用最小二乘法来计算最小Jiiter值时的可调参数。In this case, the minimum jitter is the minimum value of the measured jitter value.在此情况下,最小Jitter值就是测试所得到的最小Jitter值。


 

2.5Optimization 最佳化(Unrecorded 未刻录)

In the Optimization (Unrecorded), measurement conditions are adjusted to maximize the amplitude level of the Radial push-pull signal. 在最佳化过程中(未刻录),测试条件被调整到径向推挽信号振幅电平最大的状态。The optimized measurement conditions can be used for the following measurement items after the optimization to evaluate a disc. 最佳化的测试条件可用于在完成最佳化后对盘片进行评价时对下列测试项目进行测试。

Optimization consists of the item; Max.PP. 最佳化包含的项目:推挽信号最大值 Max.PP


2.5.1Max.PP 推挽信号最大值


BD-ROM

BD-R

BD-RE

×

The “Max.PP” measures the optimized radial push-pull signal level. “Max.PP”测试最佳化的推挽信号电平。


2.5.2Adjustable Parameter 可调参数

A maximum of five measurement conditions can be adjusted to reach the maximum Rpp signal amplitude value conditions. 在测试Bottom Jiiter时,最多可对五种测量条件进行调整以获得径向推挽信号振幅电平值最大的测试条件。Possibly set the measurement order, variation, steps of an adjustable parameter, and whether to use the adjustable parameter or not as needed to derive the measurement conditions of the maximum Rpp signal amplitude value. 可设定可调参数的测定顺序,变量和步骤,以及根据需要决定是否使用可调参数来确定获得最大推挽信号振幅电平的测定条件。

Adjustable Parameter

可调参数

Description

说明

Expander 伸展器

Adjusts the Lenses(Expanders) up and down in the PUH. 调整光头内的透镜组(伸展器),使之向上或向下。The Spherical Aberration is calibrated simultaneously. 同时对球面像差进行了校准。

Focus offset

聚焦补偿

Adjusts the Defocus Amount by driving a focus coil and adding an offset.

通过驱动聚焦线圈并施加偏移量来调整散焦量。

Track offset

跟踪补偿

Adjusts the Untracked Amount by driving a tracking coil and adding an offset.

通过驱动聚焦线圈并施加偏移量来调整轨道跟踪偏移。

Radial tilt 径向倾斜

Adjusts the Radial Tilt of the PUH. 调整光头的径向倾斜角度。

Tangential tilt

切向倾斜

Adjusts the Tangential Tilt of the PUH.

调整激光头的切向倾斜角度


The adjustable parameters have the upper and lower limit values and the steps of an adjustable parameter set for each adjustment items, and the Rpp in the direction of the lower limit and the Rpp in the direction of the upper limit are measured with the current standard settings as the reference point. 可调参数有上下限度,每个调整项目都有对应的可调参数,在参数上限和下限方向的推挽信号按现行标准进行测量别设为参考点。The optimum parameter is calculated from the measured Rpp amplitude value. 最佳参数由推挽信号振幅电平测量值计算而得。Several parameters may affect the servo systems such as tracking servos. 有些参数会对伺服系统,如跟踪伺服,产生影响。If an extreme adjustable parameter is set, the servo might come off.若可调参数达到临界点,可能会导致伺服失败。Therefore, if the sampled Rpp amplitude value exceeds the value, which is 10% lower than the maximum Rpp amplitude value of the measured values, cancel any further condition adjustments and proceed to the following procedure. 因此,如果取样的径向推挽信号振幅电平超过临界值,比最大推挽信号低10%时,剩余的调整条件将被取消,并转向下列步骤:(If measuring toward the upper limit, measure toward the lower limit. 如果测试方向为上限,将转向下限。If measuring toward the lower limit, measure the following adjustable parameter or the following measurement item.)如果测试方向为下限,将测试下列可调参数或转为对测试项目进行测试。

 


① Start from the current standard settings of the adjustable parameter. 从可调参数的当前标准设定开始。

② Adjust the parameters toward the lower limit, and then measure the Rpp amplitude value.将可调参数向下限方向调整,人后测试径向推挽信号的振幅电平值。

③ Cancel the adjustments toward the lower limit, if the Rpp amplitude value exceeds the variation limit of -10%. 如果径向推挽信号振幅电平降低10%以上,取消向可调参数下限方向的调整。

④ Measure an Rpp amplitude value toward the upper limit, as in ② & ③. 像步骤② 和 ③一样测试可调参数上限方向的推挽信号振幅电平值。

⑤ Calculate the best parameter of the maximum Rpp amplitude value (upper Rpp amplitude value) by using the least-squares method from the Rpp amplitude value within the variation limit. 用最小二乘法从可调参数限度内的推挽信号值中计算推挽信号最大时的最佳可调参数。

Adjustable Parameter Setting Range可调参数设定范围

The maximum value (upper Rpp amplitude value) is calculated with the least-squares method from the Rpp amplitude value retrieved by adjusting the measurement conditions 使用最小二乘法计算通过调整测试条件而获得的推挽信号值,从而得到推挽信号最大时的可调参数值。. However, the correct calculation may not be able to be performed due to the transition of the adjustable parameter and/or Rpp amplitude value to be assigned to the least-squares method. 但是,修正计算可能无法进行,原因是:可调参数和/或径向推挽信号值之间的转换被指定使用最小二乘法。

① Normal adjustable parameter setting range 普通可调参数之设定范围

If the range of the lower and upper limit values of the adjustable parameter is set properly, the Rpp amplitude transition graph of the ideal “U-shaped curve” can be measured and the maximum value (upper Rpp amplitude value) of the least-squares method can be calculated with high accuracy. 如果可调参数上下限度之间的范围得到正确设定,在测试中将得到一个完美的U形曲线的径向推挽信号转化图,而且使用最小二乘法计算得到的最大推挽信号值所对应的可调参数值将非常精确。


 


② Lower limit or upper limit insufficient settings 上限或下限设定不足

If the upper limit and/or lower limit of adjustable parameter is insufficient, the “\ curve” and “/ curve” Rpp amplitude transition graphs can be measured. 如果可调参数的上限和/或下限设定不足,将得到“\”形或“/”形的转化曲线。However, calculation of the maximum value using the least-squares method will not be possible. 这样,将无法使用最小二乘法计算最大径向推挽信号值时的可调参数。In this case, the maximum Rpp amplitude is the end Rpp amplitude value near the upper and/or lower limit. 在这种情况下,推挽信号最大值就是接近上限或下限时最后测得的那个值。




③ Upper limit and lower limit insufficient settings 上限和下限设定不足

If the adjustable parameter upper limit and lower limit are insufficient, the Rpp amplitude transition graph with scarcely changed Rpp amplitude value can be measured. 如果可调参数的上限或下限不足,推挽信号转换图上的推挽信号值几乎不变。However, calculation of the maximum value using the least-squares method will not be possible. 这样,将无法使用最小二乘法计算最大径向推挽信号值时的可调参数。In this case, the maximum Rpp amplitude is the maximum value of the measured Rpp amplitude value. 在此情况下,最大推挽信号就是测定值。


 

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