客户做Audio Breakthrough Measurement的时候Fall。试验结果图附上。
请问：
1：此测试是不是指2.307GHz处产品抗EMI干扰效果不好？
2：如果1成立，哪么如何解决呢，增加一个过滤此频率段的电容吗还是更改电路、PCB设计？如果增加电容可行，需要多少容值的电容呢？
3：蓝牙耳机那部分需要屏蔽此频率段啊？
以上，谢谢！

还有哪位大侠能附上Audio Breakthrough Measurement 的一些资料学习一下啊，谢谢


[ 此贴被yingtao19在2009-04-15 13:35重新编辑 ]

虽然测试是参照301 489-7做的，但是实际产品是bluetooth，所以301 489-17的免测带应当适用
所以2307的频率可以不用测试的。
参见下面的引用
The exclusion band for immunity testing shall be calculated as follows:
• lower limit of exclusion band = lowest allocated band edge frequency -5 %;
• upper limit of exclusion band = highest allocated band edge frequency +5 %.
Using the 2,450 MHz band as an example:
• lower limit of exclusion band = 2 400 - 120 = 2 280 MHz;
• upper limit of exclusion band = 2 483,5 + 124,175 = 2 607,675 MHz;
• thus the exclusion band for 2,45 GHZ equipment falling within the scope of the present document extends
from 2 280 MHz to 2 607,675 MHz.

即使你看301 489-7，那么免测的频率是6%，更大。所以他们测的有问题！
4.3.1 Receiver and receivers of duplex transceivers exclusion band
The exclusion band for receivers and receiver sections of transceivers is the band of frequencies over which no
immunity tests with radiated RF are made.
The lower frequency of the exclusion band is the lower frequency of the receive band of the EUT minus 6 % of that
frequency.
The upper frequency of the exclusion band is the upper frequency of the receive band of the EUT plus 5 % of that
frequency.

希望多一些这方面的资料！！！