What is the fine-grained topic of the following text: Anritsu Company introduces cdma2000R 1X support for its MD8470A Signaling Tester, creating a uniquely small and highly integrated single desktop instrument solution in which user equipment (UE) developers and network operators can ensure cdma2000R 1X and PPP signaling and application performance. Only return the topic.
Introduction of cdma2000R 1X support for Anritsu's MD8470A Signaling Tester