Baudrate and framing of the serial ports ..........14 Output mode of the serial ports..........15 DCF Simulation .................. 16 Updating the Firmware ............... 17 Replacing the Lithium-Battery ............17 Technical Specifications TCR511 ............18 CE-Label ................... 19 Format of the Meinberg Standard Time String ......21...
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Signals at Rear Connector ..............22 Rear Connector Pin Assignements ..........23 Diskette with Windows Software TCRMON ........25 The program TCRMON ..............26 Online Help ................27...
Introduction The transmission of coded timing signals began to take on widespread importance in the early 1950´s. Especially the US missile and space programs were the forces behind the development of these time codes, which were used for the correlation of data. The definition of time code formats was completely arbitrary and left to the individual ideas of each design engineer.
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.
IRIG signal. The DCF-Simulation is suppressed in this case. Time and date of the real time clock can be set by a Meinberg Standard Telegram via serial port COM0. Received IRIG-Time can be re-calculated into UTC provided that no time zone changeovers such as daylight saving appear in the received IRIG telegrams.
Setting into operation To ensure proper operation, please pay attention to the following points. Supply Voltage The boards microprocessor system needs a supply voltage of +5V / 200mA. Additional- ly the Oscillator supply voltage ( +5V or +12V depends on type ) must be applied via 64pin VG connector.
( SMB ) to comply with the requirements of several systems. Meinberg IRIG-generators have an output impedance of 50 Ω Ω Ω Ω Ω , to build a matched transmission system when using a coaxial cable. If such a generator is used to synchroni- ze TCR511, the input impedance has to be set to 50 Ω...
Serial Ports The board provides two indepentently configurable serial ports at RS232 level. Both serial ports output the Standard Meinberg telegram. Telegrams can either be output automatically on second changeover or on request ( ASCII char '?' received ). Serial port COM0 can additionally be used to communicate with the enclosed monitor software.
Configuration of the board Configuration of the IRIG format to be used as well as the serial ports can be done by an on board DIP-Switch. Selecting the IRIG format The IRIG or AFNOR format to be used can be selected by switches SW1-7 to SW1-10. Please note that modulated and unmodulated code formats are applied to the board at separate inputs.
Baudrate and framing of the serial ports Baudrate and framing can be configured independently for each serial port by two DIP- switches. SW1-1 Baudrate COM0 19200 9600 Baudrate COM0 SW1-2 Framing COM0 Framing COM0 SW1-4 Baudrate COM1 19200 9600 Baudrate COM1 SW1-5 Framing COM1...
Output mode of the serial ports Two diffrent modes are configurable for each of the serial ports. Mode 'per second' causes the port to output a timestring automatically on second changeover. In 'on request' mode the timestring is output on the next second changeover after a serial char '?' ( ASCII Code 3Fh ) has been received.
DCF Simulation The DCF_MARK output ( TTL ) produces a time mark signal similar to the signals transmitted by the german VLF time code transmitter DCF77. Within one minute a complete time code frame is transmitted. Since there are no timezone and leap second announcements in the IRIG time code, these announcement flags (daylight saving flag, leap second flag) are neglected.
Updating the Firmware Whenever it is necessarry to upgrade the on-board software, the new firmware can be downloaded using the serial port COM0. If the on board boot key is pressed during at power up reset, an internal bootstrap-loader is activated and waits for instructions from the serial port COM0. A loader program will be shipped together with the file containing the image of the new firmware.
INITIALIZATION: initial time and date can be set by standard meinberg telegram via serial port COM0 PULSE OUTPUTS: pulse per second PPS, TTL-Level pulse, active high, 200ms pulse width...
9600Bd, 19200Bd FRAMINGS: 7E2, 8N1 OUTPUT CYCLE: per second or per minute SERIAL TELEGRAM: Meinberg Standard Telegram REAR EDGE CONNECTOR: according to DIN41612, type C 64, rows a+c ( male ) POWER CONSUMPTION: VCC +5V, abt. 300mA VDD +5V, abt. 50mA with TCXO-HQ option max.
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.
The program TCRMON can be used to program the time offset from UTC and the initial time of Meinberg IRIG-Receivers. The Software is executable under Win9x/2k/NT. To install TCRMON just run Setup.exe from the included diskette and follow the instruc-...
Online Help The online help can be started by clicking the menu item 'Help' in menu Help. In every program tab a direct access to a related help topic can be obtained by pressing F1. The help language can be selected by clicking the menu items Deutsch/Englisch in the Help Menu.
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