What the meaning of the "spectrum multiplayer "

hi friends
What the meaning of the "spectrum multiplayer "

Hello,
The spectrum multiplier changes the ordinate of the current acceleration spectrum.
In the TDY 2007 regulation, the program was added to determine the building usage type of the existing buildings.
It should remain as 1 in the new building design.

Hi levent
Thanks for your reply
I'm still can't recognize convert seismic code 2007 to 2018 for spectrum case
If i'm using code 2007
A0=0.1
How to change the Ex and Ey spectrum function case?

You should change A0 as 1.0.