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Summary of Contents for Meinberg PZF510
- Page 1 FUNKUHREN Technical Information Operating Instruction PZF510...
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Page 2: Impressum
Impressum Werner Meinberg Auf der Landwehr 22 D-31812 Bad Pyrmont Phone: ++49 52 81 - 9309-0 Fax: ++49 52 81 - 9309-30 Internet: http://www.meinberg.de Email: info@meinberg.de January 13, 2005... -
Page 3: Table Of Contents
Table of contents Impressum .................... 2 General information ................5 Features PZF510 .................. 6 Installation .................... 7 Operating voltage ................ 7 Antenna ..................7 Assembly of antenna............7 Front panel .................... 8 Pilot lamps .................... 8 Display ....................9 Control keys ..................9 Menu items ................... - Page 4 Replacing the lithium battery .............. 16 CE label ....................16 PZF510 with OCXO ................17 Technical specifications ..............18 Format of the Meinberg Standard Time String ......21 Signal description PZF510 ..............22 Pin assignment PZF510 ..............23 Structure of menus PZF510 ..............25...
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Page 5: General Information
General information The German long wave transmitter DCF77 started continious operation in 1970. The introduction of time codes in 1973 build the basic for developing modern radio remote clocks. The carrier frequency of 77.5kHz is amplitude modulated with time marks each second. -
Page 6: Features Pzf510
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. -
Page 7: Installation
Installation To achieve the technical data given in chapter 'technical specifications', the following points must be observed. Operating voltage The clock operates with a single +5V supply. This voltage should be sourced by a linear regulated power supply. If a switched mode power supply is used, the GND access of the PZF510 should be grounded directly or via a capacitance of at least 0.1µF. -
Page 8: Front Panel
Front panel Pilot lamps The 'Feld'-LED is switched on if a DCF-signal with at least minimum field strength needed for the correlation receiption is detected at the input of the receiver. The 'Syn.'-LED indicates that the autocorrelation coefficient decreases beyond 52% and correct receiption is not possible therefore. -
Page 9: Display
Display The eight digit alphanumeric display shows important information concerning status and time. The setting of system parameters is also done with the help of the display. Control keys It is possible to change the displayed information (time, date or status information) by two keys. -
Page 10: Pzf Stat
PZF STAT Informations about the decoding of the pseudo-random sequence are available in this menu. The following texts may be displayed: GSYNC The pseudo-random sequence is read into the internal RAM for one second and the system tries to achieve a coarse synchronisation. This procedure starts after power-up or worse receiption for more than ten seconds. -
Page 11: Dist.o.t
DIST.o.T The distance to the transmitter is entered in this menu for compensating the propagati- on delay of the received pseudo-random code. This setting should be done as exact as possible because the absolute precision of the time frame is influenced by this value. After pressing the 'Set'-button a four digit kilometer-value is displayed. -
Page 12: Par. Com1
PAR. COM1 The parameter values of serial channel COM1 are selected in this submenu.These settings are totally independant of COM0, the values allowed are the same as before: Baud rate: 600, 1200, 2400, 4800, 9600 Baud Framing: 7O2, 7N2, 7E1, 7E2, 8N1, 8N2, 8E1 SER.MODE The mode of operation of the serial ports is selected in this submenu. -
Page 13: Asynchronous Serial Interfaces
Two independant serial interfaces (RS232) are available at the rear connector of the clock PZF510. As set in menu 'Ser. Mode', the serial ports can send the Meinberg standard time string either per second, per minute or on request. Additional menus are used to set the framing and baudrate of these interfaces. -
Page 14: Frequency Synthesizer
Frequency synthesizer The synthesizer of the PZF510 generates a frequency in the range of 1/3Hz to 9.999MHz, which can be set in the menu 'SYNTH.'. The synthesizer-output is availa- ble with TTL-level, as a sinewave signal or an open drain output at the VG-connector. The frequency to be generated can be adjusted by giving the four digits of highest- order, lower significant digits are set to zero. -
Page 15: Realtime Clock
Time marks start at the beginning of new second. If a binary "0" is to be transmitted, the length of the corresponding time mark is 100 msec, if a binary "1" is transmitted, the time mark has a length of 200 msec. The information on the current date and time as well as some parity and status bits can be decoded from the time marks of the 15th up to the 58th second every minute. -
Page 16: Firmware Updates
Firmware updates Whenever the on-board software must be upgraded or modified, the new firmware can be downloaded to the internal flash memory via the serial port COM0. There is no need to remove the board to insert a new EPROM. If the 'Menu' key on the front panel is pressed or the pin '/BOOT' at the blade- connector strip is held at TTL-low level while the system is powered up, a bootstrap- loader is actived and waits for instructions from the serial port COM0. -
Page 17: Pzf510 With Ocxo
PZF510 with OCXO The optional deliverable OCXO of the PZF510 operates with a single +5V power supply. This voltage should be sourced by a stable supply to avoid drifting of the frequency caused by the power supply. Because of the low heating time of the oszillator, the OCXO can be regulated to the specified precision approximately 10 seconds after power-up. -
Page 18: Technical Specifications
Technical specifications RECEIVER: Direct conversion quadrature receiver with automatic gain control Bandwidth: approx. 20Hz, external ferrite antenna CONTROL OF RECEPTION: The DCF-signal is checked for minimum field strength by micro- processor. The result is indicated by LED. In addition, the value of the digitized field strength is displayed in menu 'FIELD'. - Page 19 SYNTHESIZER: Frequency range: 1/3 Hz...9.999 MHz Accuracy : up to 10 kHz see standard frequencies > 10 kHz : +/- 2,35 mHz max. Phase jitter : max. 60ns SYNTHESIZER- OUTPUTS: F_SYNTH: TTL-level F_SYNTH_OD: Open Drain Max. drain-source-voltage: 100 V Max. drain-current: 100 mA Dissipation power, 25°...
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Page 21: Format Of The Meinberg Standard Time String
Format of the Meinberg Standard Time String The Meinberg Standard Time String is a sequence of 32 ASCII characters starting with the STX (start-of-text) character and ending with the ETX (end-of-text) character. The format is: <STX>D:dd.mm.yy;T:w;U:hh.mm.ss;uvxy<ETX> The letters printed in italics are replaced by ASCII numbers whereas the other characters are part of the time string. -
Page 22: Signal Description Pzf510
Signal description PZF510 Name Function 32a+c Reference potential VCC in (+5V) 1a+c +5V power supply VDD in (+12V) 2a+c +12V power supply, reserved DCF_MARk out DCF77 emulation, TTL, active high pulse duration: 100ms or 200ms P_SEC out Pulse per second, TTL-level, active high /P_SEC out Pulse per second, TTL-level, active low P_MIN out... -
Page 23: Pin Assignment Pzf510
Pin assignment PZF510... -
Page 25: Structure Of Menus Pzf510
Structure of menus PZF510... - Page 26 PZF5 1 0 - PZF5 1 0 - E- 1 3 . 0 1 . 0 5...
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