  GRM (Gamma-Ray Monitor) is the high energy detector on-board the future
Chinese-French satellite SVOM (Space-based multi-band astronomical Variable
Object Monitor) which is dedicated to Gamma-Ray Burst (GRB) studies. This paper
presents the investigation of the on-board counting rate trigger algorithms of
GRM. The trigger threshold and trigger efficiency based on the given GRB sample
are calculated with the algorithms. The trigger characteristics of GRM and
ECLAIRs are also analyzed. In addition, the impact of solar flares on GRM is
estimated, and the method to distinguish solar flares from GRBs is
investigated.
