Properly Announcing a Raise? Help....

[dabluebery]

Ok. I'm going to describe the following scenario. I've looked through Robert's Rules, and it's inadequate for answering this specific question. I'm asking if this raise is legal, or illegal. Assume NL holdem.

1) Player announces Raise. Player reaches for a stack of chips, puts it in the pot, reaches for another stack of chips, puts it in the pot. Player says "Make it $2,000" or whatever.

Is this legal?

I won't post my opinion, though I have one. I was at a home tournament with a bunch of guys I don't know, and after a player made a string bet, the house explained the proper procedures for making a raise. That's where this scenario came up. There were opinions on both sides of this, both for "legal," and "illegal." Please help.

Rob