Hello, my product is undergoing KC certification testing. The required testing bands are LTE-M Band 3 and Band 5. However, the certification company reports that my device is also transmitting signals on other bands (see attached screenshot). They want us to disable the other bands to avoid additional RF testing fees. We contacted the certification company to inquire about their specific testing procedures, and their feedback is as follows:
The certification company is conducting certification tests with itsequipment called CMW500. The equipment is said to perform X frequency tests sequentially from Band 1 to 2, 3~~. The test currently failing is called the Radio Emission Test. It's also known as the RE test. (Rradiation Electromagnetic test)
We tried adding the XBANDLOCK command during application layer initialization, and we found that this command could lock the band for normal network attach. However, the problem persists on the CMW500. The certification test seem to be outside the standard network attach process? Could you please advise on our next steps? Thanks.
AT%%XBANDLOCK=1,\"0000000000000000000000000000000000000000000000000000000000000000000000000000000000010100\"\r\n
