Meinberg PZF510 - Manual (Page 6)

6
Features PZF510
The PZF510 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
simultaneously. The controller handles input and output functions of the PZF510 and
synchronizes the internal realtime clock.
By evaluating the pseudorandom phase noise, the PZF510 is able to generate time
frames with thousand times the accuracy of standard AM-time code receiver. The
precise regulation of the main oscillator (TCXO, OCXO optional for higher accuracy)
of the radio clock is possible therefore. So, the PZF510 can be used as a standard
frequency generator besides the application as a time code receiver. Six 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.
The PZF510 delivers TTL-low and TTL-high active pulses per minute and per
second further. To distribute informations concerning date, time and status, two
independant serial interfaces (RS232) are used which are configurable in a setup
menu.
Like mentioned before, the PZF510 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 of the RTC) 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 PZF510 for inserting a new EPROM.