How to use QXDM to modified GPS locating time (cold start))

[evilpigcow]

Since job requirement, i need to test GPS cold start test,
but each time i test need wait about 4 hours then can test again, its take me too much time to wait.
Is there anyone know how to use QXDM tool to modified GPS testing time then i can test again and again without waiting another 4 hours.

thanks!!