By Saqib Iqbal Ahmed NEW YORK, Nov 23 (Reuters) - The U.S.dollar fell across the board on Wednesday, after data showed U.S. business activity weakened further in November and as traders remained on edge ahead of the impending release of minutes from the Federal Reserve's November meeting. "Fed minutes will be the focus for today," said Brad Bechtel, global head of FX at Jefferies. "This is the meeting...