okay im ameer...actually my HP8563E got so many error message..334,356,319,317,353,and 351..all these error message is regarding the YTO..the YIG tune Oscilator..then i manage to change the YTO..but only 334 error message are been solved..so plzz anyone plzz help me to solve this problem..by the is it because of the YTF the YIG tune Filter have problem??
With all of those errors it is possible that you have further problems, maybe the A14 Frequency Control board.
I cannot imagine the YTF being able to cause any of these errors...