Our product is using AD9864, by out test, when the input IF signal with level of -90dBm directly into AD9864, and the DSP capture AD9864 SSI output IQ data then draw it with Matlab, the data is almost noise, we can't see valid signal. For -70dBm input…

您好：

       我在调试AD9864的过程中碰到一个问题，我用SPI给AD9864配置完后，AD9864不产生帧时钟和位时钟信号，不知道什么原因，希望哪位高手帮助一下？

     具体写进去的配置如下：0x00, 0x30

                                              0x00, 0xFF

                                              0x00, 0x30

                                              0x02, 0xF0

                                              0x06, 0x80

                                              0x08, 0x00

                                              0x0A, 0x00

                                              0x0C, 0xC9

                                              0x0E, 0x01

                                              0x10, 0x03

                                              0x12, 0x00

                                              0x14, 0x00

I want to get some specification about AD9864's mixer.

I have not found in the data sheet specifications of the mixer.

ex) Conversion Loss, Isolation and LO Level

Dear Supporter,

I am using AD9864 in our project. Now I faced a problem about RSSI.

Could you please help clarify the relationship between the RSSI values and real power? or give some comments on my issue?

thanks so much for your kindly help and support…

Hi Sir:

We have a project plan use AD9864.

Do you have any recommend VCO parts (~70MHz) as the marked in red?

Thanks and Best Regards,

Keven
   
 
 
 
 
 
 
 
 
 
 
 

     我们正在使用一款 中频子系统芯片 AD9864，

现在已经可以从 SSI 数据输出接口读取到 IQ 数据.   

但是调试的时候遇到个问题：

不知道如何根据芯片 SSI 接口输出的 ATT 和 RSSI 数值，计算输入到 AD9864 入口处的实际信号功率大小.

器件手册里描述的不是很明白，也没有给出计算公式之类的.

请问 ATT 数值和 RSSI 数值是需要换算成 dB 的？如何换算？

谢谢！

能否推荐一款为AD9684芯片(500Msps)提供低抖动时钟分配器4路输出以上？AD9510抖动有275 fs，根据AD9864数据手册计算SNR不到60dB。是否有更优秀的芯片可推荐？

谢谢！