autopilot, Hirschi is correct. If you are at the correct altitude at the FAF you will be at or slightly below the GS. You then fly into the GS and start your decent. At this point you can lower the gear and set the flaps for landing. If you are using the autopilot you also press the approach button when the diamond reaches the center.
Here is a picture that may help. The horizontal bar is just like the diamond on other airplanes.
Hope this helps you understand what you are seeing.
Regards,
Bill