5-80 L30 Line Current Differential System GE Multilin5.4 SYSTEM SETUP 5 SETTINGS55.4.8 PHASOR MEASUREMENT UNITa) MAIN MENUPATH: SETTINGS ÖØ SYSTEM SETUP ÖØ PHASOR MEASUREMENT UNITThe PHASOR MEASUREMENT UNIT menu allows specifying basic parameters of the measurements process such as signalsource, ID and station name, calibration data, triggering, recording, and content for transmission on each of the supportedports. The reporting ports menus allow specifying the content and rate of reporting on each of the supported ports.Precise IRIG-B input is vital for correct synchrophasor measurement and reporting. A DC level shift IRIG-B receivermust be used for the phasor measurement unit to output proper synchrophasor values.The PMU settings are organized in five logical groups as follows.PATH: SETTINGS ÖØ SYSTEM SETUP ÖØ PHASOR MEASUREMENT UNIT ÖØ PHASOR MEASUREMENT UNIT 1 PHASOR MEASUREMENT UNIT PHASOR MEASUREMENT UNIT 1 See below.MESSAGE REPORTING OVER NETWORK See page 5-95. PHASOR MEASUREMENT UNIT 1 PMU 1 BASIC CONFIGURATION See page 5-81.MESSAGE PMU 1 CALIBRATION See page 5-82.MESSAGE PMU 1 COMMUNICATION See page 5-83.MESSAGE PMU 1 TRIGGERING See page 5-85.MESSAGE PMU 1 RECORDING See page 5-92.NOTE