The "CAT" light blinks on my Mk V when using CT 9.64 (DOS). It does not blink using DX4WIN. Is there a polling rate issue? Other thoughts. Gerry, W6TER w6ter@att.net -- WWW: http://www.k1ea.com/ Submissions: ct-user@contesting.com Administrative requests: ct-user-REQUEST@contesting.com Problems: owner-ct-user@contesting.com