Meinberg PZF511 - Manual (Page 6)

6
Features PZF511
The PZF511 is a high precision receive module for the DCF77-signal build in eurocard
size (100mm x 160mm). The 61mm wide front panel contains an eight digit alphanume-
ric display, three LEDs and two keys as control actuators.
The microcontroller of the system correlates its receiver-PZF with the incoming
pseudorandom sequence and decodes the time information of the DCF-telegram simulta-
neously. The controller handles input and output functions of the PZF511 and synchro-
nizes the internal realtime clock.
By evaluating the pseudorandom phase noise, the PZF511 is able to generate time
frames with thousand times the accuracy of standard AM-time code receiver. The precise
regulation of the main oscillator of the radio clock is possible therefore. So, the PZF511
can be used as a standard frequency generator besides the application as a time code
receiver. Four fixed and one settable TTL-level standard frequencies are available at the
rear VG-connector. The synthesizer frequency exists as an open drain output and a
sinewave signal also.
As an addition to the previous PZF510 the PZF511 generates an IRIG timecode that is
available at the rear VG-connector both as a modulated AM and as an unmodulated
DCoutput.
Furthermore the PZF511 provides active-low as well as active-high TTL pulses per
minute and per second. To distribute informations concerning date, time and status, three
independant serial interfaces (RS232) are used which are configurable in a setup menu.
Like mentioned before, the PZF511 includes a battery-backed realtime clock which
runs crystal-precise if the main power supply fails.
Important system parameters are stored in a battery-backed RAM or non-volatile
(EEPROM) memory.
If an update of system software becomes necessary, the new firmware can be loaded
via serial interface (COM0) without removing the PZF511 for inserting a new EPROM.