How to configure differential data?

Taking com2 output differential as an example:

(1)Unlock all com2 data output;

(2)Fix position 28.235196192 112.869327406 113.6496,configure the reference station coordinates according to the actual coordinates;

(3)Cshg open com2 rtcm1005 ontime 1-Output RTK reference station coordinates in com2;

(4)Cshg open com2 rtcm1074 ontime 1-Output GPS differential message on com2;

(5)Cshg open com2 rtcm1124 ontime 1-Output BDS differential message in com2;

(6)Cshg open com2 rtcm1084 ontime 1-output GLO differential message in com2;

(7)Cshg open com2 rtcm1094 ontime 1-Output Galileo differential message on com2;

(8)Saveconfig saves the configuration.