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Safran RbSource-1500 User Manual

Smart pps/ gps clock reference source
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RBSource_1500/GNSSource_2500_Manual
Revision: 100425
ELECTRONICS & DEFENSE
RbSource-1500 &
GNSSource-2500
Smart PPS/ GPS Clock Reference Source
User Manual
Page 1 of 88
9 April 2025

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  • Page 1 ELECTRONICS & DEFENSE RbSource-1500 & GNSSource-2500 Smart PPS/ GPS Clock Reference Source User Manual RBSource_1500/GNSSource_2500_Manual Page 1 of 88 Revision: 100425 9 April 2025...

  • Page 2: Table Of Contents

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 Contents Introduction ..........................5 Definitions ..........................5 Before Getting Started ....................... 5 3.1. Unpacking ..............................5 3.2. Safety! ................................6 3.3. Environmental Responsibility ......................... 6 3.4. Installation Procedure ..........................7 3.4.1. Connections.............................. 7 3.4.2.
  • Page 3 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.5. Timing & Locking Control Functions extended list ..............22 6.5.1. INFORMATION COMMANDS ......................22 6.5.2. TRACKING COMMANDS ........................26 6.5.3. PPSOUT COMMANDS .........................32 6.5.4. DATE / TIME COMMANDS ....................... 34 6.5.5. SETTING COMMANDS ........................36 6.5.6.
  • Page 4 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.28. Pulse origin ..............................67 6.29. Frequency limit ............................68 6.30. GPS type ..............................69 6.31. GPS language selection ......................... 70 6.32. GPS resource utilization ......................... 72 6.33. GPS longitude ............................74 6.34. GPS latitude ............................... 74 6.35.

  • Page 5: Introduction

    The GNSSource-2500 integrates a GPS receiver, a smart GPS-disciplined Rubidium clock, and distributes multiple output signals, either phase or frequency aligned depending on the operating modes. The RBSource-1500 does not integrate GPS receiver but just equipped with 1 PPS reference input.

  • Page 6: Safety

    The equipment contains materials, which can be either re-used or recycled. • Do not deposit the equipment as unsorted municipal waste. Leave it at an authorized local WEEE collection point or return to Safran Trusted 4D to ensure proper disposal. • To return the appliance:...

  • Page 7: Installation Procedure

    Connect power 100-240V 50-60Hz to J19. 2. Connect GPS antenna to J1 GPS antenna. Install the included patch antenna close to a window. (GNSSource-2500 Only. For RBSource-1500, the 1 PPS reference is to be connected in place of the antenna to J1) Notes: a.

  • Page 8: System Operations

    4. System Operations 4.1. Operating Modes The RBSource-1500 / GNSSource-2500 integrates a smart rubidium clock and a GPS receiver. It provides 4 basic modes of operation as follows: Free Run: When the Rubidium clock is not locked to a GPS reference and, thus, is free running.

  • Page 9: Operating Mode Setup

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 4.2. Operating Mode Setup The user can set up the operating mode in 2 ways: • Hardware: Select desired operation mode through the Switch 2 (see user interface location in Section 6). This mode overrides any software setup. Example: if the Switch 2 is set in Track mode, the unit will work in tracking mode, even though the user sets up the Free-Run or Sync mode through the iSyncMgr application or send a RS-232 command to the unit.

  • Page 10: System Description

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 5. System Description The RBSource-1500 / GNSSource-2500 unit consists of a GPS receiver disciplined to a smart rubidium clock (model GRCLOK-1500 as standard option or GRClok-1500 / LN for low phase noise option).

  • Page 11: Physics Package

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 The absorption cell is filled with metallic vapor which contains Rb85 and Rb87 isotopes and a buffer gas. Filtering of the pump light is achieved in the entrance region of the cell by absorption with Rb85 atoms which have an accidental overlap with one of the Rb87 resonance transitions (line B): integrated filter cell.

  • Page 12: Electronics Package

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 5.3. Electronics Package The clock transition of a Rubidium (Rb) resonator is a microwave transition at 6.834 GHz. The microwave resonance occurs as a dip in the optical signal - i.e. in the Rb lamp light which, after transiting the cell, is detected by a photodiode.

  • Page 13: The "Track" Mode And The "Sync" Mode

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 The GRClok-1500 models includes extended PPS (Pulse Per Second) facility. The hardware of this facility consists of two modules. The first module is a timer clocked at 15 MHz. This timer tag the PPSREF connected to the GRClok and generates two other PPS.

  • Page 14: The Frequency In Use

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 By default, when the GRCLOK-1500 is continuously and successfully tracking a PPSREF, the average value of the frequency is saved in EEPROM every 24 hours. With the command FSx<CR>, it is possible to cancel the learning or to make an immediate save.

  • Page 15: Frequency Fluctuations During The Tracking

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 There are two limits. If the phase time error becomes bigger than the first limit, an alarm is raised up, but the tracking continues. If the phase time error comes bigger than the second limit, then the tracking stops.

  • Page 16: System Communication

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 In other situations, like synchronization of a base station to the GPS constellation, it is recommended to not allow the restart of tracking by setting MAV parameter 06, bit 2 to 0. This way GPS receiver anomalies may be cancelled.
  • Page 17 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 Where each returned byte is an ASCII coded hexadecimal value, separated by a <Space> character. All parameters are coded at full scale. Read-back of the user provided frequency adjustment voltage on pin 6 (0 to 5V)
  • Page 18 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 This parameter corresponds to heating limiting current applied to the cell heating resistive element. In normal operation, this current depends on the ambient temperature but should stay between $1A and $E6. During warm-up, this current is set to its maximal value $00 (no current limiting).
  • Page 19 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 CENTER FREQUENCY ADJUSTMENT WITH THE SERIAL INTERFACE A single character command is available to the user for center frequency adjustment. Cxxxx <CR>[<LF>] *: output frequency correction through the synthesizer, by steps of 5.12·10 , where xxxx is a signed 16 bits.

  • Page 20: Basic 2 Character Commands

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.3. BASIC 2 CHARACTER COMMANDS Extended commands beginning with 2 characters are implemented in the device for efficient managing, setting, tuning, reading back and surveying. Like the 1 character commands, this commands use the serial port 1.
  • Page 21 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 Set tracking TCdddddd<CR><LF> dddddd = Time constant dddddd<CR><LF> dddddd : time constant in phase loop seconds time constant seconds ( 000100 to 999999 TC000000 : change to auto. TC?????? : interrogation x=0 : save not evr. 24 hours Set frequency FSx<CR><LF>...

  • Page 22: Timing & Locking Control Functions Extended List

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 FREEZE FREEZEx<CR><LF> x= 1:freeze frequency x<CR><LF> x: 1:frequency frozen frequency x= 0:no x: 0:no Reset micro RESET<CR><LF> (Identification & welcome controller message, GPS binary) Warning: These commands are acting into non volatile memory. Numbers of commands sent during the whole unit life time limited to 100'000 in total (all commands cumulated).
  • Page 23 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 Example Command Answer Comment SN<CR> 000098<CR><LF> - General Status. ST<CR><LF> Answer: s<CR><LF> Status. 0: warming up or no light 1: tracking set-up 2: track to PPSREF 3: sync to PPSREF 4: Free Run. Track OFF...
  • Page 24 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 s: +/- ppp: value in approx. ns. sppp: Beat effective time interval PPSOUT vs PPSREF + fine phase BT3<CR><LF> comparator value. Answer: ddddddddd sppp<CR><LF> ddddddddd: delay in ns. sppp: s: +/- ppp: value in approx. ns.
  • Page 25 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 • BT8 can work as time tagging for PPSREF. • BT1 BT3 output ????????? if there is no PPSREF . • Regarding the phase comparator, no precision or linearity can be expected. This comparator just increases the resolution of the phase used by the tracking algorithm.

  • Page 26: Tracking Commands

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.5.2. TRACKING COMMANDS Tracking start and stop. PPSOUT synchronization. AWddd Set the no alarm window during a tracking. TWddd Set the tracking window during a tracking. TCdddddd Set tracking loop time constant. Set frequency saving.
  • Page 27 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 Example Command Answer Comment TR1<CR> 1<CR><LF> Tracking start. Set synchronization state of PPSOUT - PPSINT. SYx<CR><LF> Interrogation of sync. state. SYx<CR><LF> Synchronization state. Set sync. state to OFF. Set sync. state to ON.
  • Page 28 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 Set the no alarm window during a tracking. An alarm is raised up if the time interval ppsint vs ppsref become AWddd<CR><LF>* bigger than the ddd value, but the tracking continues as long this time interval is lower than the Tracking Window.
  • Page 29 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 Reset value: Last value stored in EEPROM. Notes • When the tracking is stopped, Status=5, and the pin 5 of the output connector is driven to high. The iSync goes in holdover and the frequency in use is an average value of former frequencies.
  • Page 30 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 Set frequency save mode. FSx<CR><LF>* mode. no saving every 24 hours. save holdover frequency in EEPROM every 24 hours. save holdover frequency in EEPROM now. save actual frequency in EEPROM now. interrogation. Answer: y<CR><LF>...
  • Page 31 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 * Warning : This command is acting into non volatile memory. Numbers of commands sent during the whole unit life time limited to 100'000 in total (all commands cumulated). Data in : RAM, EEPROM...

  • Page 32: Ppsout Commands

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.5.3. PPSOUT COMMANDS PWddddddddd Set the PPSOUT pulse width. DEddddddddd PPSOUT delay. Set PPSOUT cadence and initial PPdddeee phase. PWddddddddd<CR><LF>* Set the pulse width of PPSOUT. Pulse width in ns, rounded to 66 ns.
  • Page 33 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 MAv access : Reset value: 000000000 Notes • When going in tracking, Status=1, the delay vary continuously, as PPSINT is aligned on PPSREF. • After a command SY1, PPSOUT is aligned to PPSINT and DE=000000000.

  • Page 34: Date / Time Commands

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 Command Answer Comment PP??????<CR> 001000<CR><LF> normal pulse per second pulse every 2 seconds. Synchronized to even GPS PP002000<CR> 002000<CR><LF> second. pulse every 2 seconds. Synchronized to odd GPS PP002001<CR> 002001<CR><LF> second. pulse every minute. Synchronized to minute since PP060000<CR>...
  • Page 35 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 MAv access : Reset value: 2000-01-01 Notes • After reception of this command, the device responds following the rules of the command BTx. This means the answer is not immediate, but can be delayed up to 1 s.

  • Page 36: Setting Commands

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 • It is a pulse - message system. That mean the time information is referenced to the PPSINT just before command arrival. As the answer is coming after the next PPSINT, it is 1 second ahead.
  • Page 37 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 action verb. parameter number. From 00 to FF. MARxx<CR><LF> Read the ram value of the parameter number xx. MALxx<CR><LF> Read the eeprom value of the parameter number xx. MAFxx<CR><LF> Read the flash value of the parameter number xx.

  • Page 38: Other Commands

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 y= 1 signed, 1 byte y= 2 unsigned, 2 byte y= 3 signed, 2 byte y= 4 unsigned, 4 byte y= 5 signed, 4 byte y= 6 unsigned, 8 byte y= 7 signed, 8 byte...
  • Page 39 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 interrogation. Answer: x<CR><LF> freeze state 1: frozen 0:no. Factory setting: EEPROM modification : No Data in : RAM, EEPROM MAv access : Reset value: Last value stored in EEPROM. Notes • No tracking possible.

  • Page 40: Device Status

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.6. DEVICE STATUS 6.6.1. STATUS BROADCASTED BY MESSAGES warming up or no light The device was just powered on. tracking set-up The device is going in tracking after this one was initiated. track to PPSREF Frequency tracking of PPSREF.

  • Page 41: The Mavxx

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.7. THE MAvxx.. SYSTEM 6.7.1. INTRODUCTION In order to make the tuning easy, there is a computer interface oriented command, the MAvxx.. command. • Managing parameters on a clear and easy way : Reading, MARxx.., and writing, MAWxx.., parameters in ram (working parameters).

  • Page 42: Mavxx

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.8. MAVxx.. PARAMETERS DESCRIPTION FOR THE GRCLOK-1500 Numerical values are in hexa coded ascii. 6.8.1. Clock main parameters Parameter Data ram eeprom flash Value(default) Help type SPTGRCLOK-1500- ascii Factory welcome message 1/00/3.10 ascii...
  • Page 43 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 u 1byte GPS language u 1byte GPS resource utilization s 4byte 00000000 GPS longitude s 4byte 00000000 GPS latitude s 4byte 00000000 GPS altitude s 2byte 0010 Time GPS-UTC offset u: unsigned, s: signed GPS GDK-1.

  • Page 44: Factory Welcome Message

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.9. Factory welcome message Parameter description Paramet eepro Data flash Value(default) Help type SPTLNR- ascii Factory welcome message 001/00/3.10 Message description This message is transmitted on pin 18 (TxD1) some delay after Power on /Reset.

  • Page 45: User Welcome Message

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.10. User welcome message Parameter description Parameter ram eeprom flash Data type Value(default) Help ascii Free for user message User welcome message Message description This message is transmitted on pin 18 (TxD1) some delay after Power on /Reset.

  • Page 46: Gps Configuration Delay

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.11. GPS configuration delay Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte GPS configuration delay (s) Description This value is the delay in seconds before the first activated message is transmitted on pin 18 (TxD1)

  • Page 47: Gps Configuration Interval

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.12. GPS configuration interval Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte GPS configuration interval (s) Description This value is the interval in seconds between messages that are transmitted on pin 18 (TxD1) after Power /Reset.

  • Page 48: Timing And Frequency Flags

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.13. Timing and frequency flags Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte Timing / Frequency Bit description Default bit State Help Comment value 1: thermal compensation active Therm. comp. Useful for noise reduction...
  • Page 49 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 Changing timing and frequency flags with the Monitoring program : Page 49 of 88...

  • Page 50: Tracking Flags

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.14. Tracking flags Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte Tracking Bit description Default bit State Help Comment value 1: select 24 hours true average 24h exp/true True average is useful for base...
  • Page 51 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 bit 0, Track The "Track" value can also be changed with the command TRx. Changing tracking start flags with the Monitoring program : Page 51 of 88...

  • Page 52: Tracking Start Flags

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.15. Tracking start flags Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte Tracking start Bit description Default bit State Help Comment value keep frequency Keep To simplify frequency behavior...
  • Page 53 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 Changing tracking start flags with the Monitoring program : Page 53 of 88...

  • Page 54: Communication Flags

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.16. Communication flags Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte Communication control Bit description Default bit State Help Comment value 1: transparent communication Normal/Transparent For GPS receiver to a GPS...
  • Page 55 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 Changing communication flags with the Monitoring program : Page 55 of 88...

  • Page 56: Holdover

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.17. Holdover Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte Holdover. Don't touch. Description GRCLOK-1500, sw 3.10 : under development, please don't touch. 6.18. Aging Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte Aging.

  • Page 57: Environment Flag

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.19. Environment flag Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte Environment. Bit description bit Help Boat Vehicle Submarine/diving Labs(frequency) Base station Changing the value in eeprom: the new parameter is taken account after power on / reset.

  • Page 58: Messages Coming Out Every Second

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.20. Messages coming out every second MAv parameters 0x0B and 0x0C. The iSync is able to send one message every second at 4 time slot positions: ~3ms, ~250ms, ~500ms, ~750ms. At each time slot, 1 of 4 messages is possible.
  • Page 59 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 Notes • The reference for time slot is PPSINT. • Position information of message $GPRMC is updated as soon as new information from the GPS receiver are available. This mean if this message is activated 4 times, position information may vary.

  • Page 60: Validity Duration Of The A / V Flag, Message $Gprmc

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.21. Validity duration of the A / V flag, message $GPRMC Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte Rb:F0 Crystal:18 [A] validity life(hours). Changing value ram: parameter taken account immediately.

  • Page 61: Pulse Width

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.22. Pulse width Parameter description Parameter ram eeprom flash Data type Value(default) Help u 4byte 000186A0 Pulse width. Changing value ram: parameter taken account immediately. Changing the value in eeprom: the new parameter is taken account after power on / reset.

  • Page 62: Tracking Window

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.23. Tracking window Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte GRCLOK-1500 : 4 Tracking window. Changing value ram: parameter taken account immediately. Changing the value in eeprom: the new parameter is taken account after power on / reset.

  • Page 63: Alarm Window

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.24. Alarm window Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte GRCLOK-1500 : 04 Alarm window. Changing value ram: parameter taken account immediately. Changing the value in eeprom: the new parameter is taken account after power on / reset.

  • Page 64: Tracking Loop Time Constant

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.25. Tracking loop time constant Parameter description Parameter ram eeprom flash Data type Value(default) Help u 4byte 00000000 Tracking loop time constant Changing value ram: parameter taken account immediately. Changing the value in eeprom: the new parameter is taken account after power on / reset.

  • Page 65: Fine Comparator Offset

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.26. Fine comparator offset Parameter description Parameter ram eeprom flash Data type Value(default) Help s 1byte Fine comparator offset Changing value ram: parameter taken account immediately. Changing the value in eeprom: the new parameter is taken account after power on / reset.

  • Page 66: Pulse Every D Second

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.27. Pulse every d second Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte Pulse every d second Changing value ram: parameter taken account immediately. Changing the value in eeprom: the new parameter is taken account after power on / reset.

  • Page 67: Pulse Origin

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.28. Pulse origin Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte Pulse origin Changing value ram: parameter taken account immediately. Changing the value in eeprom: the new parameter is taken account after power on / reset.

  • Page 68: Frequency Limit

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.29. Frequency limit Parameter description Parameter ram eeprom flash Data type Value(default) Help u 2byte 7FFD Frequency limit Changing value ram: parameter taken account immediately. Changing the value in eeprom: the new parameter is taken account after power on / reset.

  • Page 69: Gps Type

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.30. GPS type Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte GPS type Description GRCLOK-1500, sw 3.10 : the software don't take account this parameter. Page 69 of 88...

  • Page 70: Gps Language Selection

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.31. GPS language selection Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte GPS language Possible values Value Help NMEA $GPRMC Furuno NMEA Trimble TSIP Novatel SSII UBlox LEA-T Motorola @@A2...
  • Page 71 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 Changing GPS language with the Monitoring program: Page 71 of 88...

  • Page 72: Gps Resource Utilization

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.32. GPS resource utilization Parameter description Parameter ram eeprom flash Data type Value(default) Help u 1byte GPS resource utilisation Bit description Default bit State Help Comment value 1: Position transfer from GPS to...
  • Page 73 RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 Typical configuration for LEA-xT: Page 73 of 88...

  • Page 74: Gps Longitude

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.33. GPS longitude Parameter description Parameter ram eeprom flash Data type Value(default) Help s 4byte 00000000 GPS longitude Description Units : tbd (e-7deg) GRCLOK-1500, sw 3.10 : nothings is done with this parameter.

  • Page 75: Gps Gdk-1 Configuration Message

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.36. GPS GDK-1 configuration message Parameter description Each message is related to a GPS type. Note : This GPS messages are only useful in GDK-1 configuration. This configuration is not recommended for new developments.

  • Page 76: Serial Communication Interface 2

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.37. SERIAL COMMUNICATION INTERFACE 2 6.37.1. INTRODUCTION The device has a second serial port to communicate on a transparent way with a GPS receiver. Important information like GPS time and position can be transmitted. The GPS receiver is also monitored and a PPSREF tracking can be stopped in case of dysfunction.

  • Page 77: Message Nmea $Ptnta

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.39. Message NMEA $PTNTA Proprietary SpectraTime general iSync indicator. ~3ms ~250ms ~500ms ~750ms Activation commands BTA, MAWØBØA MAWØBAØ MAWØCØA MAWØCAØ Activation after power on MASØBØA MASØBAØ MASØCØA MASØCAØ Ø : zero. Example: $PTNTA,20000101001558,1,T4,663542250,-511,4,1,0*1F<CR><LF>...

  • Page 78: Message Nmea $Ptnts,B

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.40. Message NMEA $PTNTS,B Proprietary SpectraTime details iSync indicator. ~3ms ~250ms ~500ms ~750ms Activation commands BTB, MAWØBØB MAWØBBØ MAWØCØB MAWØCBØ Activation after power on MASØBØB MASØBBØ MASØCØB MASØCBØ Ø : zero. Example: $PTNTS,B,2,F6B6,F688,F644,,,1,001500,001.50,,*16<CR><LF>...

  • Page 79: Message Nmea $Gprmc

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.41. Message NMEA $GPRMC Legacy NMEA minimum message. ~3ms ~250ms ~500ms ~750ms Activation commands BTR, MAWØBØ1 MAWØB1Ø MAWØCØ1 MAWØC1Ø Activation after power on MASØBØ1 MASØB1Ø MASØCØ1 MASØC1Ø Ø : zero. Example: $GPRMC,134550.00,A,4659.3554,N,00654.4072,E,,,090507,,,E*58<CR><LF> $GPRMC : message header that never change.

  • Page 80: Message Nmea $Gpzda

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.42. Message NMEA $GPZDA Legacy NMEA timing message. ~3ms ~250ms ~500ms ~750ms Activation commands BTZ, MAWØBØ2 MAWØB2Ø MAWØCØ2 MAWØC2Ø Activation after power on MASØBØ2 MASØB2Ø MASØCØ2 MASØC2Ø Ø : zero. Example: $GPZDA,133358,09,05,2007,,*4E<CR><LF> $GPZDA : message header that never change.

  • Page 81: The Nmea $Gprmc Mode

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.43. THE NMEA $GPRMC mode The iSync device can track a ppsref and update its internal GPS time system with information coming from a NMEA message $GPRMC. Conditions: Communication port : RxD1. Pin 19. Configuration : 9600,n,8,1 PPSREF : Pin 8.

  • Page 82: Special Commands

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.44. Special commands This special commands are for debugging. It is not recommended to include them in a standard development. Command @@@@GPS<CR>[<LF>] Open a transparent serial communication way between a terminal and a GPS receiver connected to the iSync device.

  • Page 83: Time Of Day Command Synchronization

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 6.45. Time of Day Command Synchronization Important Rb GRCLOK-1500 sw 3.10 : has a different behavior than former sw version. (Crystal SXO sw 2.10 : has a different behavior than former sw version.) There is now a pulse - message system.

  • Page 84: System I/O Interfaces

    Sync or Track mode enabled Red LED Rubidium clock locked alarm Green LED 1PPS GPS applied SWITCH Free run, Sync or track selection switch See the separate RBSource-1500 / GNSSource-2500 datasheet for characteristic of the outputs. Page 84 of 88...

  • Page 85: System Gps Antenna Kit

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 8. System GPS Antenna Kit A GPS patch antenna with 5 meters (16.4’) of cable is included in the normal package. This antenna can be installed close to a window. If installed in a region susceptible to lightning, a surge arrestor must be installed.

  • Page 86: Safe Gps Antenna Installation

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 9. Safe GPS Antenna Installation Below is described where and how to install safely a GPS antenna. Where to install the GPS Antenna The antenna must be located on a place with a direct view to the sky.

  • Page 87: Glossary

    RbSource-1500 & GNSSource-2500 User Manual, Rev 100425 GLOSSARY Term Definition Adobe Acrobat A software program that enables people to read and print files saved in the Reader PDF format. Allan Deviation Square root of Allan Variance: It indicates the typical deviation from one measurement to the next.

  • Page 88: Safran Technical Support

    Information furnished by Safran is believed to be accurate and reliable. However, no responsibility is assumed by Safran for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Safran reserves the right to make changes without further notice to any products herein. Safran makes...

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