MEINBERG FDM180: Frequency Deviation Monitor for 50/60Hz power line networks

Key Features:

• Monitoring of Mains Frequency
• Pre-connected GNSS or PZF Receiver as Reference
• 2 analog outputs (time deviation and/or frequency deviation)
• Option: FDM180D with 5mm LED Display
• Serial RS-232 Interface
• Calculation of time based on the local frequency

Millihertz Resolution
The FDM module uses a GNSS synchronized 10 MHz signal as a reference and calculates a running average over either 100 ms or 1 s. Other powerline frequency related mea­surements are also available including: Frequency Deviation (the difference between the actual frequency and the nominal frequency, either 50/60 Hz), Powerline Time (a separate timebase that is initialized using GNSS time and then advanced based upon the 50/60 Hz frequency), and Time Deviation (the difference between the powerline time and the reference time (GNSS time). The resolution of the frequency measurements is 0.001 Hz.

MEINBERG FDM Product Range

Deviation Monitor module (FDM)
Network Time Servers available with integral Frequency Deviation Monitor module (FDM):

• Meinberg LANTIME M300/GPS
• Meinberg LANTIME M900/GPS

Network Displays Supporting FDM:

• Meinberg DU35K
• Meinberg DU70

The Meinberg FDM module is a cost effective, powerful and robust solution to monitor and record powerline frequency performance. This module also enables the user to re­ceive alarm notifications if the frequency falls outside preset limits, and to easily log system performance data to fulfill regulatory compliance requirements.

The FDM module is designed as an option for the Meinberg LANTIME M300 and M900 products. Each Time Server equipped with the FDM module offers the full LANTIME feature set, including highly accurate and reliable GPS synchro­nized stratum 1 NTP time and redundant network interfaces.

All FDM products support both 50Hz and 60Hz powerline frequencies!