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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:

CH

x_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. The groups of characters as defined below:

x

0 or 1 corresponding on the number of the capture input

_

ASCII space 20h

dd.mm.yy

the capture date:

dd

day of month

(01..31)

mm

month

(01..12)

yy

year of the century

(00..99)

hh:mm:ss.fffffff

the capture time:

hh

hours

(00..23)

mm

minutes

(00..59)

ss

seconds

(00..59, or 60 while leap second)

fffffff

fractions of second, 7 digits

<CR>

Carriage Return, ASCII Code 0Dh

<LF>

Line Feed, ASCII Code 0Ah

Summary of Contents for GPS167SV

Page 1: ...Incl Windows Software GPSMON32 GPS167SV Technical Information Operating Instructions ...

Page 2: ...Imprint 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 May 05 2006 ...

Page 3: ...ptional 4x COM 9 DCF77 Emulation 10 Programmable Pulses optional 11 Timecode outputs optional 11 Abstract 11 Installation 12 Power Supply 12 Mounting the Antenna 12 Assembly with CN UB E optional 13 Powering Up the System 14 The Front Panel Layout 15 FAIL LED 15 LOCK LED 15 BSL Button 15 OSC RESET Button 16 GPS INIT Button 16 RS232 COM0 16 Solder bridge RXD TXD 16 Table of Contents ...

Page 4: ...ing 24 Format of the Uni Erlangen String NTP 25 Format of the NMEA 0183 String RMC 27 Format of the ABB SPA Time String 28 Format of the Computime Time String 29 Timecode 31 Principle of Operation 31 Block Diagram Timecode 31 IRIG Standard Format 32 AFNOR Standard Format 33 Assignment of CF Segment in IEEE1344 mode 34 Generated Timecodes 35 Selection of Generated Time Code 36 Outputs 36 AM Sine Wa...

Page 5: ...The GPSMON32 Configuration and Monitoring Application 41 Serial Connection 41 Network Connection 41 Online Help 42 Diskette with Windows Software GPSMON32 43 ...

Page 6: ...on of 21 satellites together with several active spares in six orbital planes 20000 km over ground provides a minimum of four satellites to be in view 24 hours a day at every point of the globe Four satellites need to be received simultaneously if both receiver position x y z and receiver clock offset from GPS system time must be computed All the satellites are monitored by control stations which ...

Page 7: ...F signal s propagation delay is done by automatic determination of the receiver s geographical position A correction value computed from the satellites navigation messages increases the accuracy of the board s oven controlled master oscillator OCXO and automatically compensates the OCXO s aging The last state of this value is restored from the battery buffered memory at power up The GPS167SV has s...

Page 8: ... optional The optional synthesizer generates a frequency from 1 8 Hz up to 10 MHz synchronous to the internal timing frame The phase of this output can be shifted from 360 to 360 for frequencies less than 10 kHz Both frequency and phase can be configured with the GPSMON32 application via serial port COM0 Synthesizer output is available at the rear connector as sine wave output F_SYNTH_SIN with TTL...

Page 9: ...two capture events is too short the warning capture overrun is being sent Asynchronous Serial Ports optional 4x COM Up to four asynchronous serial RS232 interfaces COM0 COM3 are available to the user In the default mode of operation the serial outputs are disabled until the receiver has synchronized after power up However the system can be configured to enable those outputs immediately after power...

Page 10: ...ange in daylightsaving Z1 Z2 Timezoneidentification Z1 Z2 0 1 Daylightsaving disabled Z1 Z2 1 0 Daylightsaving enabled A2 Announcementof aleap second S Startoftime code information P1 P2 P3 Even parity bits 0 10 20 30 40 50 R M 1 4 2 1 20 10 8 4 2 1 P 2 2 0 1 0 8 4 2 1 2 4 8 10 1 2 4 8 1 0 2 0 4 0 8 0 P 3 A1 Z1 Z2 A2 S 1 2 4 8 1 0 2 0 4 0 P 1 Minute reserved Hour Day of Month Day of Week Year of t...

Page 11: ... for the correlation of data The definition of time code formats was completely arbitrary and left to the individual ideas of each design engineer Hundreds of different time codes were formed some of which were standardized by the Inter Range Instrumentation Group IRIG in the early 60 s Except these IRIG Time Codes other formats like NASA36 XR3 or 2137 are still in use The board GPS167 can generat...

Page 12: ...equator because of the satellite courses which are located between latitudes of 55 North and 55 South If even this is not possible problems will occur especially during position aquisition when at least four satellites for calculation of the receivers position have to be available As soon as the position has been determined one satellite is enough to remain in synchronized state The antenna conver...

Page 13: ... in the antenna line does not matter 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 Assembly with CN UB E optional Optionally the overvoltage protector CN UB E is available Normally you directly connect the antenna converter to the system with the antenna cable Type N BNC male Type N male Type N ...

Page 14: ...ng it to start scanning for satellites This mode is called Warm Boot and the receiver can obtain ID numbers of existing satellites from the valid almanac When the receiver has found four satellites in view it can recalculate its position and afterwards will switch to Normal Operation If the almanac has been lost due to a disconnected battery the receiver will scan for a satellite and read in the c...

Page 15: ...e downloaded to the internal flash memory via the serial port COM0 There is no need to open the metal case and insert a new EPROM If the BSL pushbutton behind the front panel is pressed while the system is powered up a bootstrap loader is actived and waits for instructions from the serial port COM0 The new firmware can be sent to GPS167SV from any standard PC with serial interface A loader program...

Page 16: ...satellite to read its actual parameters If the key is pressed while the system is powered up the battery buffered memory is cleared additional and user definable parameters are reset to factory defaults RS232 COM0 The serial port COM0 is accessible via a 9pin DSUB male connector older version 9pol DSUB male connector in the frontpanel of the GPS167SV parallel hardwired to the COM0 port on the rear...

Page 17: ...explosion in case of inadequate replacement of the lithium battery Only identical batteries or batte ries recommended by the manufacturer must be used for replacement The waste battery must be disposed as proposed by the manufacturer of the battery CE Label This device conforms to the directive 89 336 EWG on the approximation of the laws of the Member States of the European Community relating to e...

Page 18: ...minutes if invalid battery buffered memory PULSE OUTPUTS change of second P_SEC TTL level change of minute P_MIN TTL level ACCURACY OF PULSES after synchronization and 20 minutes of operation TCXO HQ OCXO LQ better than 250 nsec OCXO MQ OCXO HQ better than 100 nsec better than 2 µsec during the first 20 minutes of operation FREQUENCY OUTPUTS 10 MHz 1 MHz 100 kHz TTL level ACCURACY OF FREQUENCY see...

Page 19: ... 8N2 8E1 default setting COM0 19200 8N1 COM1 9600 8N1 COM2 9600 8N1 COM3 9600 8N1 Annotation Even if one of the setup functions INIT USER PARMS or Resetting Factory Defaults is executed the serial port parameters are reset to default values only if invalid para meters have been configured TIME CAPTURE INPUTS triggered on falling TTL slope Interval of events 1 5msec min Resolution 100ns POWER REQUI...

Page 20: ... GPS synchron 24 Std gemittelt 1 10 E 11 1 10 E 11 5 10 E 12 1 10 E 12 Phasenrauschen 1 Hz 10 Hz 100 Hz 1 kHz 60 dBc Hz 90 dBc Hz 120 dBc Hz 130 dBc Hz 1 Hz 10 Hz 100 Hz 1 kHz 60 dBc Hz 90 dBc Hz 120 dBc Hz 130 dBc Hz 1 Hz 10 Hz 100 Hz 1 kHz 75 dBc Hz 110 dBc Hz 130 dBc Hz 140 dBc Hz 1 Hz 10 Hz 100 Hz 1 kHz 95 dBc Hz 125 dBc Hz 145 dBc Hz 155 dBc Hz Stromversorgung bei 25 C Normalbetrieb Aufheizph...

Page 21: ...y 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 TEMPERATURE 40 65 C HOUSING ABS plastic case for outdoor installation IP56 PHYSICAL DIMENSION ...

Page 22: ...ile leap second uv clock status characters depending on clock type u GPS clock is running free without exact synchr PZF time frame not synchronized DCF77 clock has not synchronized after reset space 20h GPS clock is synchronous base accuracy is reached PZF time frame is synchronized DCF77 clock has synchronized after reset v GPS receiver has not checked its position PZF DCF77 clock currently runs ...

Page 23: ...ers whereas the other characters are part of the time string The groups of characters as defined below x 0 or 1 corresponding on the number of the capture input _ ASCII space 20h dd mm yy the capture date dd day of month 01 31 mm month 01 12 yy year of the century 00 99 hh mm ss fffffffthe capture time hh hours 00 23 mm minutes 00 59 ss seconds 00 59 or 60 while leap second fffffff fractions of se...

Page 24: ...nth 01 12 yy year of the century 00 99 w the day of the week 1 7 1 Monday hh mm ss the current time hh hours 00 23 mm minutes 00 59 ss seconds 00 59 or 60 while leap second xxxx time zone indicator UTC Universal Time Coordinated formerly GMT MEZ European Standard Time daylight saving disabled MESZ European Summertime daylight saving enabled u clock status characters clock has not synchronized afte...

Page 25: ...rrent time hh hours 00 23 mm minutes 00 59 ss seconds 00 59 or 60 while leap second v sign of the offset of local timezone related to UTC oo oo offset of local timezone related to UTC in hours and minutes ac clock status characters a clock has not synchronized after reset space 20h clock has synchronized after reset c GPS receiver has not checked its position space 20h GPS receiver has determined ...

Page 26: ...haracter 20h n latitude the following characters are possible N north of equator S south d equator lll llll longitude of receiver position in degrees leading signs are replaced by a space character 20h e longitude the following characters are possible E east of Greenwich W west of Greenwich hhhh altitude above sea level in meters leading signs are replaced by a space character 20h ETX End Of Text ...

Page 27: ...ours 00 23 mm minutes 00 59 ss seconds 00 59 or 60 while leap second ss fractions of seconds 1 10 1 100 A Status A time data valid V time data not valid bbbb bb latitude of receiver position in degrees leading signs are replaced by a space character 20h n latitude the following characters are possible N north of equator S south d equator lllll ll longitude of receiver position in degrees leading s...

Page 28: ...s whereas the other characters are part of the time string The groups of characters as defined below yy mm tt the current date yy year of the century 00 99 mm month 01 12 dd day of month 01 31 _ Space ASCII code 20h hh mm ss fff the current time hh hours 00 23 mm minutes 00 59 ss seconds 00 59 or 60 while leap second fff milliseconds 000 999 cc Check sum EXCLUSIVE OR result of the previous charact...

Page 29: ...d by ASCII numbers whereas the other characters are part of the time string The groups of characters as defined below T Start character sending with one bit occuracy at change of second yy mm dd the current date yy year of the century 00 99 mm month 01 12 dd day of month 01 31 ww the day of the week 01 07 01 monday hh mm ss the current time hh hours 00 23 mm minutes 00 59 ss seconds 00 59 or 60 wh...

Page 30: ...30 ...

Page 31: ... it also provi des 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 Block Diagram Timecode microcontroller modulator EPLD D A converter driver 50 unbalanced Ω digital sinewave generator timecode 10 MHz modulated timecode unmodulated timecodes high and low active PPS ...

Page 32: ...32 IRIG Standard Format x 3x TYPICAL MODULATED CARRIER IRIG A 10000 Hz IRIB B 1000 Hz binary 0 binary 1 ...

Page 33: ...33 AFNOR Standard Format ...

Page 34: ... Time set during daylight saving time 64 Timezone Offset Sign sign of TZ offset 0 1 65 TZ Offset binary encoded 1 Offset from IRIG time to UTC time Encoded IRIG time plus TZ Offset equals UTC at all times 66 TZ Offset binary encoded 2 67 TZ Offset binary encoded 4 68 TZ Offset binary encoded 8 69 Position Identifier P7 70 TZ Offset 0 5 hour set if additional half hour offset 71 TFOM Time figure of...

Page 35: ...ear SBS time of day d B123 100pps AM sine wave signal 1 kHz carrier frequency BCD time of year SBS time of day e AFNOR Code according to NFS 87500 100pps AM sine wave signal 1kHz carrier frequency BCD time of year complete date SBS time of day Signal level according to NFS 87500 f IEEE1344 Code according to IEEE1344 1995 100pps AM sine wave signal 1kHz carrier frequency BCD time of year SBS time o...

Page 36: ...11 For testing purposes the output of TFOM in IEEE1344 mode can be disabled In this case the complete segment is set to zero Outputs The module GPS167 TC provides modulated and unmodulated DC Level Shift out puts The format of the timecodes is illustrated IRIG and AFNOR standardformat AM Sine Wave Output The amplitude modulated carrier is available at the VG connector pin 14a The carrier frequency...

Page 37: ...37 Technical Data Outputs Unbalanced AM sine wave signal 3VPP MARK 1VPP SPACE into 50Ω PWM signal TTL high and low active ...

Page 38: ...ency output TTL level TIMECODE DC 13a Timecode unmod out TIMECODE AM 14a Timecode mod out 3Vpp DCF_MARK out 17c DCF77 compatible second marks TTL level active high length 100 200 msec TIME_SYN 19c TTL output HIGH level if synchronization has been achieved LOW level after reset or in case of serious errors e g antenna faulty F_SYNTH 21c Synthesizer output TTL Pegel F_SYNTH_OD 22c Synthesizer output...

Page 39: ...Hz out ProgPulse2 out 13 TIME CODE DC out SCL 14 TIME CODE AM out SCL_EN 15 COM2 RxD in SDA 16 COM2 TxD out reserved P3 2 17 COM3 RxD in DCF_MARK out 18 COM3 TxD out reserved Vref TxD2 TTL 19 GND TIME_SYN out 20 GND reserved P2 3 21 GND F_SYNTH out 22 GND F_SYNTH_OD out 23 GND F_SYNTH_SIN out 24 GND COM1 TxD out 25 GND 26 GND COM0 TxD out 27 GND CAP1 in 28 GND CAP0 in 29 GND COM1 RxD in 30 GND COM...

Page 40: ...40 ...

Page 41: ...nly if the GPS serial port is configured in the same way as the PCs comport Optionally you can enforce an access if the GPS serial port is not configured with appropriate parameters for communi cation Select the menu item Enforce Connection in menu Connection and click Start in the appearing window Some firmware versions of GPS167 do not support this way of setting up a connection If Enforce Conne...

Page 42: ...e started by clicking the menu item Help in menu Help A direct access to a related help topic can be obtained everywhere by pressing the F1 key The help language can be selected by clicking the menu items Deutsch Englisch in the Help Menu ...

Page 43: ...43 Diskette with Windows Software GPSMON32 ...

Page 44: ...GP S 1 6 7 S V E 0 5 0 5 0 6 ...

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