CHP uses several buttons on the GE Rangr radio head to control the Vision system. I'm sure I'm forgetting some, but here's what I recall:
Red/WW: Press once- Pods 1/7 steady red front, Pods 3/5 blue oscillate rear**, Signalmaster on. Press twice- Same, adds w/w headlights and Pod 4 oscillating to front. This is a common "one-touch" button used for traffic stops, as it activates both front and rear low-level warning at one time.
Rr Amb/Red: Press once- Pods 1/7 oscilllate blue to rear, Signalmaster on. Press twice- adds Pods 2/6 oscillating red to rear.
**If clear TD button activated, Pods 3/5 become takedowns, can't remember if another set of pods become rear oscillators, but I THINK only has amber Signalmaster to rear at that point.
Code 3: There is one button that when pressed, activates whole light bar. All pods but 4 are standard speed rotators, with Pod 4 red steady burn forward, Signalmaster on. Pressing * button and this button activates as before but without Signalmaster (which is blinding to trailing cars in a pursuit, hence this option).
That is a basic summary of the Rangr functions. I think there are a few variations out there, but that was the standard when I was working with them.