How to find / locate Astra 2A with Pace508 motorised system



I have sky's contractor due to call shortly to install a digibox for me: trouble is, I want to keep my Pace 508 motorised system for the time being and use the free DigiBox via a Smart Priority Switch. So far so good .

Problem: how to find 28.2 east on the Pace which is analogue only; can someone please tell me if there is any known analoge signal being sent from this new satelitte position so I can define it in the Pace ??

Thanks in advance ....