And, if he's already at the throne, then he would have entered with his mandia before the reading of the psalm right?
Just trying to make sure...as many details as you can remember (or find) would be most helpful.
If it is the Vesperal Liturgy the Bishop is fully vested before the start of Vespers and is outside (in the Greek practice, always at his chair). During the entrance and at "now that we have come" he descends his chair and goes to the middle of the Solea and begins to bless the four corners. At "Father, Son and Holy Spirit" the Bishop enters the sanctuary.
This is what I remember also.
"If you are going to serve the Lord, be prepared for times when you will be put to the test. Be sincere and determined. Keep calm when trouble comes. Stay with the Lord; never abandon Him and you will be prosperous at the end of your days. Accept whatever happens to you. Even if you suffer humiliation, be patient. Gold is tested by fire and human character is tested in the furnace of humiliation. Trust the Lord and He will help you. Walk straight in His ways and put your hope in Him. " Sir 2:1-6