Meinberg TCR511 - Manual (Page 8)

8
Overview
The Board TCR511 was designed for the decoding of unmodulated and modulated
IRIG- and AFNOR time codes. Modulated codes transport the time information by
modulating a sinusoidal carrier signals amplitude whereas unmodulated signals employ a
pulse width modulated DC signal.
The receivers automatic gain control allows the reception of signals within a range
from abt. 600mVpp up to 8Vpp. The potential free input can be jumper selectable
terminated in either 50
Ω, 600Ω or 5kΩ. Modulated codes are applied to the board via an
on board SMB connector.
The unmodulated or 'DC Level Shift' time codes are applied via pins 21c and 22c of
the 64pin VG connector. Galvanic insulation of this input is obtained by an opto coupler
device.
TCR511 provides two configurable serial ports ( RS232 ), a pulse per minute and per
second ( PPS / PPM ) as well as a DCF Simulation port at TTL Level. Further three fixed
frequency outputs at 100kHz, 1MHz and 10MHz at TTL Level are available
The boards micro controller provides a Bootstrap-Loader that allows updating the
firmware stored in Flash-Memory via serial port COM0 by using the program
mbgflash.exe.