Symmetricom 87-8023 XLi FTM III AC Line Frequency Measurement Time Monitor Card [Used]

Tested/Guaranteed • Removed from Working XLi Unit • Part 87-8023 • FTM AC Line Frequency Measurement • Time Monitor • Was $1,295 • Used, Very Good Condition Photos show the actual item for sale This was removed from a working XLi unit within which it was recognized by the firmware (Version 2.4) and it showed the two sample configuration screens copied below. It is not thought to be compatible with devices other than the XLi. Description - Frequency and Time Deviation Monitor (87-8023) This plug-in card meets the specific needs of the electrical power industry. It provides a digital display and computer compatible outputs of the following parameters: Frequency Deviation – The instantaneous difference between the locally generated frequency (typically 50 or 60 Hz) and the precision frequency of the host Synchronized Clock. System Frequency – The user’s locally generated frequency. Time Deviation – The accumulated difference in time between a clock locked to the locally gene