Y adapter

my receiver has 1 coaxil hookup for dvd/ld. i run my dvd to that w/a transparent digital cable. i run my ld w/a toslink. id like to get a y adapter and and hook both the dvd/ld into the coaxil. the question is will i lose anyhting since the Y adapter is not digital? thanks
May not work, especially if both sources are powered up at the same time. Better to get a simple 75ohm video switch from RS for this.