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Table of Contents
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Summary of Contents for Meinberg DCF77 UA509
- Page 1 FUNKUHREN Technical Information Operating Instructions DCF77 UA509...
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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 November 23, 2001... -
Page 3: Table Of Contents
Table of Contents Impressum .................... 2 General Information about DCF77 ............5 Features of the AM Radio Clock DCF77 UA509 ........ 6 LF Receiver ................7 Microprocessor System .............. 7 Display ..................7 Buffered Real Time Clock ............7 Pulse Outputs ................7 Serial Interfaces ................ - Page 4 Technical Specifications ..............14 CE Label ................... 15 Format of the Meinberg Standard Time String ......16 Rear Connector Pin Descriptions ..........17 Rear Connector Pin Assignments ..........19 Component Layout ..............21...
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Page 5: General Information About Dcf77
General Information about DCF77 The radio remote clocks made by Meinberg receive the signal from the long wave transmitter DCF77. This long wave transmitter installed in Mainflingen near Frank- furt/Germany transmits the reference time of the Federal Republic of Germany. This time reference is either the Central European Time (Mitteleuropäische Zeit, MEZ) or... -
Page 6: Features Of The Am Radio Clock Dcf77 Ua509
Features of the AM Radio Clock DCF77 UA509 The hardware of UA509 is a 100mm x 160mm microprocessor board. The 20mm wide front panel contains an 8-digit LED display, three LED indicators and a time/ date switch. The receiver is connected to the external ferrite antenna by a 50 ohm coaxial cable with length up to 100m. -
Page 7: Lf Receiver
LF Receiver An external ferrit antenna is used to receive the signal from DCF77 and supplies it to the on-board direct conversion quadrature receiver with automatic gain control. The demodulated time marks are fed to the clock´s microprocessor. Microprocessor System The time marks from the receiver circuit are filtered and decoded by the microproces- sor system. -
Page 8: Serial Interfaces
Serial Interfaces Two independent asynchronous serial ports can be used to transmit information on date and time to other devices. Each of the ports can be set up as either RS232 port or 20mA current loop port. Baudrate, framing and mode of operation can be configured separately for both interfaces COM0 and COM1 by DIL switches. -
Page 9: Installation
Installation Power Supply The System requires a single supply voltage of 5V/250mA. The power supply should be longitudinal regulated. If a switched mode power supply is used the negative pole is to ground directly or via a capacitor >0,1F. The voltage feed should be applied low impedance and via the pins a1 and c1. -
Page 10: Configuration
Configuration There are two DIL switches to configure the UA509 as described below. D IL 0 D IL 1 Default settings of COM0(DIL0) and COM1(DIL1): Baudrate: 9600 Baud Framing: Output Mode: once per second Time Zone: MEZ/MESZ (CET/CEST) The two DIL switches SWx9 and SWx10 are reserved. Transmission Speed The transmission speed of each channel can be selected by the levers 1 to 3 of the DIL switches. -
Page 11: Framing
Framing Lever 4 of the DIL switches is used to select the framing of the serial ports. Changes in these settings become valid after reset. Other framings on request. SWx-4 Framing Time Zone Levers 7 and 8 of the DIL switches let the user select a time zone (MEZ/MESZ, UTC, MEZ) for each channel. -
Page 12: Setting The Clock Manually
Setting the Clock Manually To set time and date it is necessary to connect two additional push-buttons either to the circuit board (see figure below) or to the assigned pins of the rear connector (see table Rear Connector Pin Assignments). Pushing the buttons pulls the signal down to ground. -
Page 13: 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. If the pin "Boot" of the rear connector (see table Rear Connector Pin Assignments) is pulled down to ground while the system is powered up, a bootstrap-loader will be activated that waits for instructions from the serial port COM0. -
Page 14: Technical Specifications
Technical Specifications RECEIVER: Direct conversion quadrature receiver with automatic gain control Bandwidth: approx. 20Hz DISPLAY: eight digit 7-segment display, 2.5mm character height shows either time or date, selectable by front-panel switch LEDs for modulation, field strenght and free running TIMECODE CHECK: multiple software check of the incoming timecode parity and consistency check over a period of two minutes... -
Page 15: Ce Label
("?") TIME ZONE: configurable by DIL switches MEZ/MESZ=CET/CEST, MEZ=CET, UTC OUTPUT STRING: refer to: "Format of the Meinberg Standard Time String" CONNECTORS: 64 pin rear VG edge connector DIN 41612 Subminiature coaxial RF connector (SMB type) -
Page 16: 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) charac- ter. 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 17: Rear Connector Pin Descriptions
Rear Connector Pin Descriptions Signal Name Description 32a+c power supply ground VCC in (+5V) 1a+c supply voltage P_SEC out pulse per second, TTL level, active high pulse width: 200 msec P_MIN out pulse per minute, TTL level, active high pulse width: 200 msec /P_SEC out like P_SEC, but active low /P_MIN out... - Page 18 Signal Name Description TxD out RS232 output RxD in RS232 input RTS out RS232 handshake signal (Request to Send) CTS in RS232 handshake signal (Clear to Send) COM1: -pass_in/+act_in passive 20mA current loop input (-) or active 20mA current loop input (+) +pass_in passive 20mA current loop input (+) -act_out_1...
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Page 19: Rear Connector Pin Assignments
Rear Connector Pin Assignments VCC in (+5V) VCC in (+5V) SET button SDA (Option) SCL (Option) Boot DCF_MARK /P_SEC out P_SEC out /P_MIN out P_MIN out COM1 -pass_out_1 COM1 +pass_out_1 Reserve COM1 -act_out_1 COM1 +act_out_1 SET_MODE button curr_loop -15V in COM0 -pass_in/+act_in COM0 +pass_in COM0 -act_in... -
Page 21: Component Layout
Component Layout...
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