Astro's Way to Hypnotise?

I just wanna ask Astro one thing (other than the expensive packages and the no-picture during rain thingy). What the hell is the below alphanumerical messages mean?

JKM2

DGA3

PIP1

It keeps flashing on my Astro screen! Is it designed to mesmerise me? Or to keep me glued to your channels? Whatever the reasons, please remove them immediately! I’m paying a hefty sum for your services and you’re flashing weird numbers on-screen!