Meinberg NUC80E - Manual (Page 6)

6
NUC80E Features
* microprocessor system for display, setting and output-check
* 8-digit alphanumeric display
* menu-driven configuration
* short circuit proofed line booster for minute and second lines
* integrated power supply, also for preconnected radio clock (+5V)
* buffered RAM
* optocoupler for line-control
* serial current loop interface
Installation
The passive serial current loop input of the NUC80E has to be connected to an active
serial output of a radio clock. This radio clock must send the "Meinberg Standard
Time String" once per second. NUC80E compares the time string from the serial port
with the time of the slave clocks and generates the necessary pulses on the slave clock
lines. If the slave time is behind the master time it will be catched up by generating
additional pulses on the minute line every two seconds. If the slave time is ahead the
NUC80E stops generating pulses until the master time has reached the slave time. The
fetched out pulses are checked on the board. If one of the lines is shorten, the lost
pulses are generated later after the failure has been removed.
Keys
Information on time and configuration can be retrieved by the two keys in the front
panel.The Menue key lets the user choose between several menus. Pressing Set lets
the user enter the corresponding menu.