Forums › BB Series Discussions › BB60D External ReferenceThis topic has 1 reply, 2 voices, and was last updated 2 years, 10 months ago by Andrew.Viewing 2 posts - 1 through 2 (of 2 total)AuthorPosts October 31, 2023 at 5:16 am #244340 AKumarParticipantKindly suggest the best Economic External reference that can be used with BB60D to achieve 0.1 PPM Accuracy. October 31, 2023 at 8:58 am #244354 AndrewModeratorAKumar,We replied to your email that you also sent.For other customers who are interested in this question, we recommend a GPSDO.AuthorPostsViewing 2 posts - 1 through 2 (of 2 total)You must be logged in to reply to this topic.Log In Username: Password: Keep me signed in Log In