With the default settings, you have to wait a while... But not just stand and wait. But moving.
This module is designed to add ambient combat near the player in a REAL mission, when the player has objectives and do this tasks one by one.
If this ACM works like you want: create (spawn) a lot of enemy and friendly near to you, it would be horrible, like a CoD game, when you can see how the enemy crerated from the nothing...
But there are a several setting what you can modify and the intensity/type of enemy/friendly patrols can grow.
Example:
waitUntil {!isNil {BIS_ACM getVariable "initDone"}};
waitUntil {BIS_ACM getVariable "initDone"};
//Sets frequency and number of patrols (0-1). BIS_ACM is module name
[1, BIS_ACM] call BIS_ACM_setIntensityFunc;
//min max spawn distance
[BIS_ACM, 300, 600] call BIS_ACM_setSpawnDistanceFunc;
//factions to be spawned
[["USMC", "RU"], BIS_ACM] call BIS_ACM_setFactionsFunc;
//Skill range for spawned units
[0, 0.6, BIS_ACM] call BIS_ACM_setSkillFunc;
//Amount of ammo spawned units possess
[0.2, 0.5, BIS_ACM] call BIS_ACM_setAmmoFunc;
//Type of patrol. With 0 meaning no chance of appearing, and 1 meaning 100% chance. -1 removes patrol type completely.
["ground_patrol", 1, BIS_ACM] call BIS_ACM_setTypeChanceFunc;
["air_patrol", 0, BIS_ACM] call BIS_ACM_setTypeChanceFunc;