Meinberg GPS167 Operating Instructions Manual
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Meinberg GPS167 Operating Instructions Manual

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Operating Instructions
GPS167

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Summary of Contents for Meinberg GPS167

  • Page 1 Technical Information Operating Instructions GPS167...

  • Page 2: Impressum

    Impressum Meinberg Funkuhren GmbH & Co. KG Auf der Landwehr 22 D-31812 Bad Pyrmont Phone: +49 (0) 52 81 / 9309-0 Fax: +49 (0) 52 81 / 9309-30 Internet: http://www.meinberg.de Email: info@meinberg.de April 25, 2006...

  • Page 3: Table Of Contents

    Table of Contents Impressum .................... 2 General Information ................6 GPS167 Features .................. 7 Time Zone and Daylight Saving..........8 Pulse and Frequency Outputs ............. 8 Time Capture Inputs ..............9 Asynchronous Serial Ports (optional 4x COM)......9 DCF77 Emulation ..............10 Programmable pulse (optional) ..........
  • Page 4 The Menus in Detail ................17 Root Menu ................17 Menu RECEIVER POS............19 Menu SV CONSTELLATION ..........19 Menu SV POSITION ............... 20 Menu USER CAPTURE ............20 Menu SETUP ................20 SETUP FREQUENCY OUTPUT........21 SETUP ENABLE OUTPUTS ........21 SETUP TIME ZONE ............
  • Page 5 Oscillator specifications............35 Technical Specifications GPS167 Antenna ......36 Time Strings ................37 Format of the Meinberg Standard Time String ....37 Format of the Meinberg Capture String ......38 Format of the SAT Time String ........39 Format of the Uni Erlangen String (NTP) ...... 40 Format of the NMEA 0183 String (RMC) ......

  • Page 6: General Information

    General Information The satellite receiver clock GPS167 has been designed to provide extremly precise time to its user. The clock has been developed for applications where conventional radio controlled clocks can´t meet the growing requirements in precision. High precision available 24 hours a day around the whole world is the main feature of the new system which receives its information from the satellites of the Global Posi- tioning System.

  • Page 7: Gps167 Features

    GPS167 Features The hardware of GPS167 is a 100mm x 160mm microprocessor board. The 105mm wide front panel integrates a 4 x 16 character LC display, two LED indicators and 4 push buttons. The receiver is connected to the antenna/converter unit by a 50 ohm coaxial cable (refer to "Mounting the Antenna").

  • Page 8: Time Zone And Daylight Saving

    Time Zone and Daylight Saving GPS system time differs from the universal time scale UTC (Universal Time Coordi- nated) by the number of leap seconds which have been inserted into the UTC time scale after GPS has been initiated in 1980. The current number of leap seconds is part of the navigation message supplied by the satellites, so GPS167´s internal real time is based on UTC.

  • Page 9: Time Capture Inputs

    COM0 is compatible with other radio remote clocks made by Meinberg. It sends the time string either once per second, once per minute or on request with ASCII ´?´ only. Also the interfaces can be configured to transmit capture data either automatically when available or on request.

  • Page 10: Dcf77 Emulation

    DCF77 Emulation The GPS167 satellite controlled clock generates TTL level time marks (active HIGH) which are compatible with the time marks spread by the German long wave transmit- ter DCF77. This long wave transmitter installed in Mainflingen near Frankfurt/ Germany transmits the reference time of the Federal Republic of Germany: time of day, date of month and day of week in BCD coded second pulses.

  • Page 11: Programmable Pulse (Optional)

    Programmable pulse (optional) At the male connector Typ VG64 there are three programmable TTL outputs (Prog Pulse 0-2), which are arbitrarily programmable. Other technical details are described at the end of this manual. Timecode outputs (optional) Abstract The transmission of coded timing signals began to take on widespread importance in the early 1950´s.

  • Page 12: Installation

    Installation Power Supply The power supply used with GPS167 has to provide only one output of +5V. The output voltage should be well regulated because drifting supply voltages reduce the short time accuracy of the generated frequencies and timing pulses. The power supply lines should have low resistance and be connected using both pins a and c of the rear connector.

  • Page 13: Antenna Short-Circuit

    When installing the high voltage protector CN-UB/E (CN-UB-280DC) be aware to set it directly after reaching indoor. The CN-UB/E is not for outdoor usage. Antenna Short-Circuit In case of an antenna line short-circuit the following message appears in the display: If this message appears the clock has to be disconnected from the mains and the defect is to eliminate.

  • Page 14: Assembly With Cn-Ub/E (Optional)

    Assembly with CN-UB/E (optional) Optional the overvoltage protector CN-UB/E is available. Standard you connect the antenna converter directly with the antenna cable to the system. GPS167 Antenne N-Norm Stecker möglichst kurz! N-Norm Stecker CN-UB/E N-Norm Stecker Meinberg max. 1.5m N-Norm/BNC Stecker...

  • Page 15: Powering Up The System

    Powering Up the System If both the antenna and the power supply have been connected the system is ready to operate. About 10 seconds after power-up the receiver´s (OCXO-LQ) until 3 minutes (OCXO-MQ / HQ) has warmed up and operates with the required accuracy. If the receiver finds valid almanac and ephemeris data in its battery buffered memory and the receiver´s position has not changed significantly since its last operation the receiver can find out which satellites are in view now.

  • Page 16: The Front Panel Layout

    The Front Panel Layout FAIL LED The FAIL LED is turned on whenever the TIME_SYN output is low (receiver is not syn- chronized). FAIL LOCK LOCK LED The LOCK LED is turned on when after power- up the receiver has acquired at least four satelli- MENU NEXT tes and has computed its position.

  • Page 17: Next Key

    NEXT Key When editing parameters (LCD cursor is visible) this key moves the cursor to the next digit rsp. to the next parameter to be edited. If the current menu just displays data (cursor not visible) pressing this key switches to a submenu (if available). INC Key When editing parameters this key increments the digit or letter at the cursor position.
  • Page 18 "....(drft)" The frequency is generated and the phase was already syn- chronous to the pulse output P_SEC, but in the moment the phase can´t be controlled or adjusted because no satellite is received now. If the NEXT key is pressed one time from the root menu a submenu is displayed showing the receiver´s software revision: If the NEXT key is pressed for second time a submenu is displayed showing other receiver´s infos...

  • Page 19: Menu Receiver Pos

    Menu RECEIVER POS. This menu shows the current receiver position. The NEXT key lets the user select one of three formats. The default format is geographic latitude, longitude and altitude with latitude and longitude displayed in degrees, minutes and seconds. The next format is geographic, too, with latitude and longitude displayed in degrees with fractions of degrees.

  • Page 20: Menu Sv Position

    Menu SV POSITION This menu gives information on the currently selected satellite (SV). The satellite´s ID number, its elevation, azimuth and distance from the receiver position reflect the satellite´s position in the sky whereas the doppler shows whether the satellite is coming up from the horizon (doppler positive) or going down to the horizon (doppler negative).

  • Page 21: Setup Frequency Output

    SETUP FREQUENCY OUTPUT This setup menu lets the user edit the frequency and phase to be generated by the on- board synthesizer. Frequencies from 1/3Hz up to 10MHz can be entered using four digits and a range. The range can be selected if the INC key is pressed while the cursor is positioned on the frequency´s units string.

  • Page 22: Setup Time Zone

    SETUP TIME ZONE This menu lets the user enter the names of the local time zone with daylight saving disabled and enabled, together with the zones´ time offsets from UTC. The left part of the display shows the zone and offset if daylight saving is off whereas the right part shows name and offset if daylight saving is on.

  • Page 23: Setup Serial Port Parm

    If no changeover in daylight saving is wanted, an identical date and time must be configured in both of the submenus (see fig. below). In addition identical offsets for DAYLIGHT SAV ON/OFF should be configured in the submenu TIMEZONE. (Example for a region without daylight saving time and with a local time offset of +8 hours to UTC.) SETUP SERIAL PORT PARM Using this topic the user can enter transmission speed and framing of each serial port.

  • Page 24: Setup Serial String Type

    COM2: Meinberg COM1: Capture COM3: Meinberg The following time strings can be selected: Meinberg Standard String GPS167 Capture String SAT String UNI-Erlangen String NMEA String (RMC) SPA String Computime String Other technical details are described at the end of this manual.

  • Page 25: Setup Pout X (Optional)

    SETUP POUT X (optional) This menu is used for configuration of the pulse outputs. There are three pulse outputs available (POUT 1-3). Mode This field selects the mode of operation of an output. Possible modes are POUT OFF, POUT TIMER, SINGLE PULSE, CYCLIC PULSE, PPS, PPM and PPH. Timer mode If Timer mode is selected, a window as shown above is displayed.

  • Page 26: Single Pulse

    Single Pulse Selecting Single Pulse generates a single pulse of defined length once per day. You can enter the time when the pulse is generated in the field 'Single Shot Time'. The value in field 'Length' determines the pulse duration. A pulse duration from 10 msec to 10 sec in steps of 10 msec can be selected.

  • Page 27: Menu Quick Reference For Progr. Pulse

    Menu Quick Reference for progr. Pulse MENU CLR/ACK CLR/ACK MODE NEXT NEXT AKTIV...

  • Page 28: Setup Irig Settings (Optional)

    SETUP IRIG SETTINGS (optional) This menu lets the user select the timecodes to be generated by GPS167. Most IRIG codes do not carry any time zone information, hence UTC is selected for output by default. If desired, the clock´s local time can be output by selecting "TIME: LOCAL". The IEEE1344 has a so called TFOM (time figure of merit) segment that carries an information on the synchronization state of the radio clock.

  • Page 29: Setup Initial Time

    SETUP INITIAL TIME If the receiver´s on-board real time clock keeps a wrong time the receiver is unable to compute the satellites´ correct elevation angles and dopplers. This submenu enables the user to change the receiver´s system time for initialization. After the receiver has locked, its real time clock will be adjusted using the information from the satellites.

  • Page 30: Force Boot Mode

    FORCE BOOT MODE This menu lets the user force the receiver into the Boot Mode. This may be necessary when the satellite datas in the memory are too old or the receiver position has changed by some hundred kilometers since last operation. Syncronisation time may be reduced significant.

  • Page 31: Resetting Factory Defaults

    Resetting Factory Defaults If both the NEXT key and the INC key on the front panel are pressed while the system is powered up the battery buffered memory is cleared and user definable parameters are reset to factory defaults. The key should be held until the root menu is displayed on LCD.

  • Page 32: Skilled/Service-Personnel Only: Replacing The Lithium Battery

    Skilled/Service-Personnel only: Replacing the Lithium Battery The life time of the lithium battery on the board is at least 10 years. If the need arises to replace the battery, the following should be noted: ATTENTION! Danger of explosion in case of inadequate replacement of the lithium battery.

  • Page 33: Technical Specifications Gps167

    Technical Specifications GPS167 RECEIVER: 6 channel C/A code receiver with external antenna/converter unit ANTENNA: Antenna/converter unit with remote power supply refer to chapter "Technical Specifications GPS167 Antenna" ANTENNA INPUT: antenna circuit DC-insulated; dielectric strength: 1000V Length of cable: refer to chapter "Mounting the Antenna" LC DISPLAY: 4x16 character, menu selectable by push buttons TIME TO SYNCHRO-...
  • Page 34 SYNTHESIZER: 1/8 Hz up to 10 MHz ACCURACY OF SYNTHESIZER: base accuracy depends on system accuracy 1/8 Hz to 10 kHz Phase syncron with pulse output P_SEC 10 kHz to 10 MHz frequency deviation < 0.0047 Hz SYNTHESIZER OUTPUTS: F_SYNTH: TTL level F_SYNTH_OD: open drain...

  • Page 35: Oscillator Specifications

    POWER REQUIREMENTS: 5V ± 5%, max. @1100mA (see oscilatorspecifikations) PHYSICAL DIMENSION: 19" module in a closed 112mm high x 102mm wide closed aluminium case FRONT PANEL: 3U / 21HP (128mm high x 107mm wide), Aluminium REAR EDGE CONNECTOR: according to DIN 41612, type C 64, rows a+c (male) RF CONNECTOR: coaxial BNC AMBIENT TEMPERATURE: 0 ...

  • Page 36: Technical Specifications Gps167 Antenna

    Technical Specifications GPS167 Antenna ANTENNA: dielectrical patch antenna, 25 x 25mm receive frequency: 1575.42 MHz bandwidth: 9 MHz CONVERTER: local oscillator to converter frequency: 10 MHz first IF frequency: 35.4 MHz POWER REQUIREMENTS: 12V ... 18V, @ 100mA (provided via antenna cable) CONNECTOR: coax type N, female AMBIENT...

  • Page 37: Time Strings

    Time Strings 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 38: Format Of The Meinberg Capture String

    Format of the Meinberg Capture String The Meinberg Capture String is a sequence of 31 ASCII characters terminated by a CR/LF (Carriage Return/Line Feed) combination. The format is: CHx_tt.mm.jj_hh:mm:ss.fffffff<CR><LF> The letters printed in italics are replaced by ASCII numbers whereas the other characters are part of the time string.

  • Page 39: Format Of The Sat Time String

    Format of the SAT Time String The SAT Time String is a sequence of 29 ASCII characters starting with the STX (start-of-text) character and ending with the ETX (end-of-text) character. The format <STX>dd.mm.yy/w/hh:mm:ssxxxxuv<ETX> The letters printed in italics are replaced by ASCII numbers whereas the other characters are part of the time string.

  • Page 40: Format Of The Uni Erlangen String (Ntp)

    Format of the Uni Erlangen String (NTP) The time string Uni Erlangen (NTP) of a GPS clock is a sequence of 66 ASCII characters starting with the STX (start-of-text) character and ending with the ETX (end-of-text) character. The format is: <STX>tt.mm.jj;...
  • Page 41 leap second insertion ‘L’ leap second is actually inserted (active only in 60th sec.) ‘ ‘ (space, 20h) no leap second is inserted bbb.bbbb latitude of receiver position in degrees leading signs are replaced by a space character (20h) latitude, the following characters are possible: ‘N’...

  • Page 42: Format Of The Nmea 0183 String (Rmc)

    Format of the NMEA 0183 String (RMC) The NMEA String is a sequence of 65 ASCII characters starting with the ‘$’ character and ending with the characters CR (carriage return) and LF (line-feed). The format is: $GPRMC,hhmmss.ss,A,bbbb.bb,n,lllll.ll,e,0.0,0.0,ddmmyy,0.0,a*hh<CR><LF> The letters printed in italics are replaced by ASCII numbers or letters whereas the other characters are part of the time string.

  • Page 43: Format Of The Abb Spa Time String

    Format of the ABB SPA Time String The ABB SPA Time String is a sequence of 32 ASCII characters starting with the characters ">900WD" and ending with the <CR> (Carriage Return) character. The format is: >900WD:yy-mm-tt_hh.mm;ss.fff:cc<CR> The letters printed in italics are replaced by ASCII numbers whereas the other characters are part of the time string.

  • Page 44: Format Of The Computime Time String

    Format of the Computime Time String The Computime time string is a sequence of 24 ASCII characters starting with the T character and ending with the LF (line feed, ASCII Code 0Ah) character. The format T:yy:mm:dd:ww:hh:mm:ss<CR><LF> The letters printed in italics are replaced by ASCII numbers whereas the other characters are part of the time string.

  • Page 45: Timecode (Optional)

    Timecode (optional) Principle of Operation The Board GPS167 has been designed for the generation of IRIG, AFNOR and IEEE1344 standard time codes. Apart from the digitally generated amplitude-modula- ted code, it also provides the unmodulated DC-Level shift code. The modulated sine wave carrier and the board´s internal time pattern are derived from the radio clock´s disciplined oscillator.

  • Page 46: Irig Standard Format

    IRIG Standard Format...

  • Page 47: Afnor Standard Format

    AFNOR Standard Format...

  • Page 48: Assignment Of Cf Segment In Ieee1344 Mode

    Assignment of CF Segment in IEEE1344 mode Bit No. Designation Description Position Identifier P5 Year BCD encoded 1 Year BCD encoded 2 low nibble of BCD encoded year Year BCD encoded 4 Year BCD encoded 8 empty, always zero Year BCD encoded 10 Year BCD encoded 20 high nibble of BCD encoded year Year BCD encoded 40...

  • Page 49: Generated Timecodes

    Generated Timecodes Besides the amplitude modulated sine wave signal, the board also provides unmodula- ted DC-Level Shift TTL output in parallel. Thus six time codes are available. a) B002: 100pps, PWM DC signal, no carrier BCD time of year b) B122: 100pps, AM sine wave signal, 1 kHz carrier frequency BCD time of year c) B003:...

  • Page 50: Selection Of Generated Time Code

    Selection of Generated Time Code The time code to be generated can be selected by Menu Setup IRIG Settings or the GPS Monitorprogram. DC-Level Shift Codes (PWM signal) B00x and modulated sine wave carrier B12x are always generated simultaneously. Both signals are provi- ded at the VG64-Connector, i.e.

  • Page 51: Technical Data

    Technical Data Outputs: Unbalanced AM sine wave signal: (MARK) / 1V (SPACE) into 50Ω PWM signal: TTL, high and low active...

  • Page 52: Signal Description Gps167 V7.X

    Signal Description GPS167 V7.x Name Function 32a+c Ground VCC in (+5V) 1a+c +5V supply VCC in (+12V) 2a+c +12V supply VCC in (+5V) 3a+c +5 V supply (TCXO / OCXO) P_SEC out Pulse when second changes, TTL level, active high, length 200 msec P_MIN out Pulse when minute changes, TTL level, active high, length 200 msec...

  • Page 53: Rear Connector Pin Assignments Gps167 V7.X

    Rear Connector Pin Assignments GPS167 V7.x VCC in (+5V) VCC in (+5V) VCC in (+12V) VCC in (+12V) VDD in (TCXO/OCXO) VDD in (TCXO/OCXO) (reserved, FreqAdjust out) P_SEC out (reserved, 10 MHz in) P_MIN out /RESET in/out 100 kHz out ProgPulse0 out 1 MHz out ProgPulse1 out...

  • Page 55: Menu Quick Reference

    Menu Quick Reference...
  • Page 56 GP S 1 6 7 - E - 2 5 0 4 0 6...

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