Meinberg DCF77C51, Technical Information & Operating Instructions

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Technical Specifications
RECEIVER: Synchronous demodulator with automatic gain control
bandwidth: approx. 50Hz
ANTENNA: Active external ferrite antenna in a plastic case
Length of the cable: up to more than 100m
RF AMPLITUDE,
MODULATION:
Indicated by LED
TIMECODE
CHECK:
Parity and consistency checking over a period of two minutes
RF distortions indicated by both LED and a status character in
the serial output string
Without RF signal the clock runs on XTAL
with an accuracy of 10
-6
BATTERY
BACKUP:
Gold Cap or Lithium battery
when the power is turned off, the on-board RTC keeps the time
based on XTAL for more than 48 hours (gold cap) rsp. more
than 10 years (lithium battery)
RELIABILITY OF
OPERATION:
Microprocessor supervisory circuit provides watchdog timer,
power supply monitoring and backup-battery switchover
OUTPUT
PULSES:
Optocoupler outputs (70V/20mA) provide pulses of 200msec
width whenever a new second rsp. minute begins.
P_SEC pulse with RS232-level (Jumper JP2 must be set)
ASYNCHRONOUS
SERIAL PORT:
Transmission speed, framing, time zone and mode of operation
configurable by DIL switch
TRANSMISSION
SPEED:
600 through 19200 baud
FRAMING: 7E1, 7E2, 8N1 or 8N2
MODE OF
OPERATION:
time string transmitted automatically once per second, once per
minute, or when a request character '?' has been received