Hitachi CU-HD1500 operating instructions Facility names and functions Rear & Front

Facility names and functions (Rear & Front)

26 COMMUNICATION connector

Intercom and tally signals are input from external system.

27 WFM CONTROL connector

This connector is used to select the display mode of the waveform monitor.

28 TRUNK connector

Use for communication with TRUNK connector on CA-HF1500 via RS-422 interface.

29TALLY OUT connector Contact outputs for tally signals.

30TALLY CONTACT/VOLTAGE

The TALLY input can be contact or voltage supply.

Set the TALLY switches according to the systems connected to the COMMUNICATION connector on rear panel.

31 Receiver Level LED (Front)

The strength of the arriving light signal via fiber cable is indicated by position of lighting LED.

GREEN1

GREEN2

YELLOW

RED

Indicate the receiver level approximately GREEN1: -3dBm to -8dBm (Normal) GREEN2: -8dBm to -11dBm YELLOW: -11dBm to -14dB (Warning) RED: under -14 dB (Alarm)

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