The default behaviour on Windows 10 is to "let Windows manage cellular connections’. This means that the cellular interface is used when Ethernet or Wi-Fi disappear.
My question is what state is the modem in when Windows is not using it (regarding EM transmission)? Is the transmitter turned off and the receiver just polled for signal strength, or does the transmitter get used at all when Windows is not using the Cellular interface?
The reason for asking is regarding EM issues in a medical device.