alarm panels are COMMONLY quickly found- they tend to be installed in a similar way, in a similar location (not visible from an exterior window). Even if the basement window was broken, it could have been armed with a sensor BUT in older homes these are visible from the outside. (Looking in, from outside my back patio door the sensor is clearly visible above my front door.) The perp would also absolutely know, assuming he's cogent, that there is a sensor when he opens the door/window--- you hear/feel when the magnetic/electric connection is broken.
As far as motion detectors go, if a window were broken I'd leave the motion detector OFF, atleast in that area, because windblown debris might set it off, as would a bird/cat/squirrel entering through the broken glass.
So now we're down to the ALARM PANEL. If I were the perp (and I'm not!) I'd have a quick look to see what's flashing, as I picked up the phone extention to make sure no calls were out-going (to alarm company or the cops). Then I'd scan an exterior door or two-- Are there "door open" sensors? AND have a-quick-look-see that 2-key deadbolts were not set(in case I had to "bolt").
Now, the perp is still a stupid-a$$ for breaking and entering and would be caught in most UPSCALE homes I've been to....my Dad has a second, secure phone that contacts the police and pressure-weight detectors in his hallways etc. His neighbors have battery-backed-up cameras and more. So really, breaking in is STUPID. These people have a short life-span. Let's hope that's true here.