Production RF testing, on the other hand, involves connecting the module to a spectrum analyzer using a coaxial cable to measure the conducted power. This is done by contacting the test probes with the ANT pins.

The module supports mode: AP, STA, AP+STA.  

Yes, it does. And you can download AT firmware and use UART for pass-through.  

 AT instruction development: it applies to the case. The development method is very simple and it needs to use the UART of the module to connect to the other master control. The customer can use other MCU to edit their programs. If you wanted to control some functions of Wifi module and you can send the corresponding AT command via UART.

The module supports cloud services.  It is used to set up the environment in the cloud platform, you can use ESP-IDF or AT command to connect to the cloud platform to achieve data interaction.

You can download AT firmware and test the function by AT command. To learn more, you can refer to the module function test document.  

Yes, it does. A base station requires to provide differential signal input.

Only MinewSemi's MS33SN1 supports it, the main difference between BeiDou II and BeiDou III is the center frequency point.