Hello,
We have an established design for a 400 MHz range RF module based on the CC1200. This device has passed compliance with no issues, critically, it passes industrial radiated immunity testing @ 10 V/m field strength.
This is using Transparent Serial Mode.
However, when we change the match & filter components to create a new RF module to operate in the 800 MHz band, the device fails radiated immunity testing at various frequencies between 160 MHz and 200 MHz.
We are using the same register settings from the 400 MHz version in the 800 MHz version, with the exception of the frequency band and frequency settings. This is a critical issue for us, delaying a product launch, so we really need to find out what we can do to fix it. Hopefully there are some registers (AGC, etc?) which can be adjusted to resolve this.
Thanks in advance,
-Gordon.