** Shares of digital media company STV Group STVG.L fall more than 27% to 138 pence
** On track for biggest one-day pct drop, price lowest since early 2013
** Expects full-year revenue and adjusted operating profit below consensus
** Group revenue for full-year expected between 165 million pounds and 180 million pounds ($221.50 million and $241.63 million), adj. operating margin at about 7%
** YTD, STV shares down 34.24%
($1 = 0.7449 pounds)
(Reporting by Unnamalai L in Bengaluru)
((Unnamalai.L@thomsonreuters.com;))