> 1）在连续模式传输中，EVM约为35％。
> a）在VXA模式下，当使用滤波器长度= 22且收敛= 0.01时自适应均衡器开启时，EVM降低至小于3％。
> b）在VSA模式下，当自适应均衡器打开时，它似乎不会收敛到相同的设置。
PSA和VXA中呈现的收敛的标称值被标准化。
要将VSA中的收敛值转换为标准化值，请将89600 VSA收敛值除以1e-07。
>> 3）使用自适应均衡器的推荐设置是什么？
它应该在生产测试期间打开吗？
关于此的任何应用笔记？
是的，自适应均衡器可用于生产测试。
我不知道有关此主题的任何应用笔记。
此VSA帮助文本页面描述了均衡器的使用。
http://wireless.agilent.com/wireless/helpfiles/89600B/WebHelp/89600_CSH.htm#../Subsystems/digdemod/content/dlg_digdemod_comp_equalfilter.htm>> 4）测试没有实现RRC滤波器类型，而不是该模块
它是一个5阶逆chebyshev低通滤波器。
那么推荐使用的通道过滤器设置应该是什么？
您可以尝试将测量过滤器设置为无，将参考过滤器设置为矩形，并将点/符号设置为1。
>> 5）通过设置符号时序，它会对生产测试产生影响吗？
我怀疑设置符号时序的要求与不正确的过滤设置有关。
除故障排除外，不应同时使用EQ和符号时序调整。
以上来自于谷歌翻译
以下为原文
> 1) In continuous mode transmission, the EVM is about 35%.
> a) In VXA mode, when the adaptive equalizer is on using Filter Length=22 and convergence=0.01, the EVM reduced to less than 3%.
> b) In VSA mode, when the adaptive equalizer is on, it doesn’t seems to converge with the same settings.
The nominal value for Convergence presented in PSA and VXA is normalized. To convert the Convergence value in the VSA to the normalized value, divide the 89600 VSA Convergence value by 1e-07.
>
> 3) What should be the recommended setting for using the adaptive equalizer? Should it be turned on during production testing? Any app notes on this?
Yes, the adaptive EQ can be used for production testing. I am not aware of any app notes on this topic.
This VSA help text page describes use of the equalizer.
http://wireless.agilent.com/wireless/helpfiles/89600B/WebHelp/89600_CSH.htm#../Subsystems/digdemod/content/dlg_digdemod_comp_equalfilter.htm
>
> 4) The module tested do not implement a RRC filter type, instead it is a 5th order inverse chebyshev low pass filter. What should be the recommended channel filter setting used then?
You might try setting the measurement filter to none and the reference filter to rectangular with points/symbol set to one.
>
> 5) By setting the symbol timing, will it have any impact on the production testing?
I suspect that the requirement to set symbol timing is related to incorrect filtering setup. You should not use EQ and symbol timing adjust at the same time except for troubleshooting.
> 1）在连续模式传输中，EVM约为35％。
> a）在VXA模式下，当使用滤波器长度= 22且收敛= 0.01时自适应均衡器开启时，EVM降低至小于3％。
> b）在VSA模式下，当自适应均衡器打开时，它似乎不会收敛到相同的设置。
PSA和VXA中呈现的收敛的标称值被标准化。
要将VSA中的收敛值转换为标准化值，请将89600 VSA收敛值除以1e-07。
>> 3）使用自适应均衡器的推荐设置是什么？
它应该在生产测试期间打开吗？
关于此的任何应用笔记？
是的，自适应均衡器可用于生产测试。
我不知道有关此主题的任何应用笔记。
此VSA帮助文本页面描述了均衡器的使用。
http://wireless.agilent.com/wireless/helpfiles/89600B/WebHelp/89600_CSH.htm#../Subsystems/digdemod/content/dlg_digdemod_comp_equalfilter.htm>> 4）测试没有实现RRC滤波器类型，而不是该模块
它是一个5阶逆chebyshev低通滤波器。
那么推荐使用的通道过滤器设置应该是什么？
您可以尝试将测量过滤器设置为无，将参考过滤器设置为矩形，并将点/符号设置为1。
>> 5）通过设置符号时序，它会对生产测试产生影响吗？
我怀疑设置符号时序的要求与不正确的过滤设置有关。
除故障排除外，不应同时使用EQ和符号时序调整。
以上来自于谷歌翻译
以下为原文
> 1) In continuous mode transmission, the EVM is about 35%.
> a) In VXA mode, when the adaptive equalizer is on using Filter Length=22 and convergence=0.01, the EVM reduced to less than 3%.
> b) In VSA mode, when the adaptive equalizer is on, it doesn’t seems to converge with the same settings.
The nominal value for Convergence presented in PSA and VXA is normalized. To convert the Convergence value in the VSA to the normalized value, divide the 89600 VSA Convergence value by 1e-07.
>
> 3) What should be the recommended setting for using the adaptive equalizer? Should it be turned on during production testing? Any app notes on this?
Yes, the adaptive EQ can be used for production testing. I am not aware of any app notes on this topic.
This VSA help text page describes use of the equalizer.
http://wireless.agilent.com/wireless/helpfiles/89600B/WebHelp/89600_CSH.htm#../Subsystems/digdemod/content/dlg_digdemod_comp_equalfilter.htm
>
> 4) The module tested do not implement a RRC filter type, instead it is a 5th order inverse chebyshev low pass filter. What should be the recommended channel filter setting used then?
You might try setting the measurement filter to none and the reference filter to rectangular with points/symbol set to one.
>
> 5) By setting the symbol timing, will it have any impact on the production testing?
I suspect that the requirement to set symbol timing is related to incorrect filtering setup. You should not use EQ and symbol timing adjust at the same time except for troubleshooting.
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