Sinusoidal Noise observed in BMG250 Gyroscope

[Sandy]

I am using BMG250 MEMS gyroscope. I am observing a "Sinusoidal Noise" of primary frequency approximately 8 Hz in a few samples of the sensors. I have attached the plots for the reference. I am not able to decode the reason behind the same. This is also reflecting in the Allan plot and seriously affecting the ARW values. I request you to please suggest any solution for the same. 

Data points were recorded at the non-vibrating platform with variable sampling rates (50 Hz, 400 Hz). Used different power sources (Dedicated Power Supply, Adaptor, independent battery).   

[shellywang]

Hi Sandy,

Coluld you give more information below?

• raw data log of BMG250, X/Y/Z axis
• configuration: like range, operation mode, power mode , bandwidth
• it's better add accelerometer in the testing and log the acc data at the same time.
• what's kind of rotation table  used ?

[Sandy]

- Accelerometer and Gyro data is attached here. 
- configuration: Range-500 deg/sec, ODR: 400 Hz, Mode: Normal Mode
- Data was recorded in static conditions on the computer desk and with no surrounding vibrations

[shellywang]

Could you upload the Acc and Gyro data log?

[Sandy]

Accelerometer and gyroscope data is attached.