How to ensure that the reception in both antennas are similar

I was sure that there is an AT command that presents the data of the device such as SNR or RSSI per antenna but didn’t find anything related in Sierra Wireless Manual/AT Manual. The only idea I have for now is to use AT+CSQ (using screen in LINUX) to check the signal quality on the entire device with one antenna detached and then to compare the result with the other antenna detached. Am I missing another method? AT command or any other solution?

Any assistance would be appreciated.

Hi Coral,
Could you tell us more on your configuration? In particular: what AirLink Router do you have?