I am supporting GE Healthcare who is using WL1837MOD in their product called Vscan Air CL. They are doing the China certification for their product.
Issue Faced: They reached out to us informing that during the testing, they found out that the spurious emission is above limit at 2472 MHz. I also collected the below details from them.
- Conducted emission done thru a u.FL to SMA connector connected to an Agilent spectrum analyzer
- Calibrator tool used to set up device TX
- Wilink firmware details from output of ifconfig wlan0 up - PHY firmware revision (as per logs) is Rev 8,220.127.116.11, firmware booted (as per logs) is Rev 18.104.22.168.88.
- Test procedure and images are attached to this post