I have the UM 982 module, used in the AOG autopilot project. The module worked with a single antenna. There is documentation on configuring the module on the AOG website.
On the Ardupilot website, there are only settings for connecting to the autopilot board. I want to find out what settings are needed for the module to work with Ardupilot.
Below is an example of the settings
CONFIG ANTENNA POWERON
CONFIG NMEAVERSION V410
CONFIG RTK TIMEOUT 600
CONFIG RTK RELIABILITY 3 1
CONFIG PPP TIMEOUT 300
CONFIG HEADING RELIABILITY 4
CONFIG HEADING FIXLENGTH
CONFIG HEADING LENGTH
CONFIG UNDULATION AUTO
CONFIG DGPS TIMEOUT 600
CONFIG RTCMB1CB2A ENABLE
CONFIG ANTENNADELTAHEN 0.0000 0.0000 0.0000
CONFIG PPS ENABLE GPS POSITIVE 500000 1000 0 0
CONFIG SIGNALGROUP 4 5
CONFIG ANTIJAM AUTO
CONFIG AGNSS DISABLE
CONFIG COM1 230400
CONFIG COM2 230400
CONFIG COM3 230400
GPGGA COM1 0.2
UNIHEADINGA COM1 0.2
AGRICA COM1 0.2
GNGGA COM1 0.2
GNRMC COM1 0.2