Jackson Labs Micro-JLT GNSS Manuale utente

Micro-JLT GNSS™

User Manual

Document: 80200550

Version: 1.2

Date: November 6, 2019

Micro-JLT GNSS™ User Manual

1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2 General Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2.1 Antenna Lightning Protector . . . . . . . . . . . . . . . . . . . . . 2

1.2.2 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2.3 Power Connections. . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2.4 Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . 3

2 Quick-Start Instructions . . . . . . . . . . . . . . . . . . . . . . 5

2.1 Powering Up the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.1.1 PCB Photos . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.1.2 Mechanical Drawings . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1.3 Notes on Signal Interfacing and J1 Connector . . . . . . . . . . . . . . 9

2.1.4 Coaxial Connectors. . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

2.3 Concurrent-GNSS Capabilities . . . . . . . . . . . . . . . . . . . . . . .10

2.4 Connecting the GNSS Antenna . . . . . . . . . . . . . . . . . . . . . . 11

2.5 Remote serial control . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.6 Loop parameter adjustment . . . . . . . . . . . . . . . . . . . . . . . . 11

3 SCPI-Control Quick Start Instructions . . . . . . . . . . . . . . 13

3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.2 General SCPI Commands . . . . . . . . . . . . . . . . . . . . . . . . 13

3.2.1 Quick Start Commands . . . . . . . . . . . . . . . . . . . . . . . 13

3.2.2 *IDN? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.2.3 HELP?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

3.3 GPS Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

3.3.1 GPS:SATellite . . . . . . . . . . . . . . . . . . . . . . . . . . .15

3.3.2 GPS:SATellite:TRAcking:COUNt? . . . . . . . . . . . . . . . . . . .15

3.3.3 GPS:SATellite:VISible:COUNt? . . . . . . . . . . . . . . . . . . . . 15

3.3.4 NMEA Support . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.3.5 GPS:GPGGA <int> [0,255] . . . . . . . . . . . . . . . . . . . . . . 16

3.3.6 GPS:GGASTat <int> [0,255] . . . . . . . . . . . . . . . . . . . . . 17

3.3.7 GPS:GPGLL <int> [0,255] . . . . . . . . . . . . . . . . . . . . . . 17

3.3.8 GPS:GPRMC <int> [0,255] . . . . . . . . . . . . . . . . . . . . . . 17

3.3.9 GPS:GPGSA <int> [0,255] . . . . . . . . . . . . . . . . . . . . . .18

3.3.10GPS:GPGSV <int> [0,255] . . . . . . . . . . . . . . . . . . . . . . 18

3.3.11GPS:XYZSPeed <int> [0,255] . . . . . . . . . . . . . . . . . . . .18

3.3.12GPS:GPVTG <int> [0,255] . . . . . . . . . . . . . . . . . . . . . . 19

3.3.13GPS:GPZDA <int> [0,255] . . . . . . . . . . . . . . . . . . . . . . 19

3.3.14GPS:PASHR <int> [0,255] . . . . . . . . . . . . . . . . . . . . . .20

3.3.15GPS:PJLTS <int> [0,255] . . . . . . . . . . . . . . . . . . . . . . 21

3.3.16GPS:PJLTV <int> [0,255] . . . . . . . . . . . . . . . . . . . . . . 21

3.3.17GPS:GYRO . . . . . . . . . . . . . . . . . . . . . . . . . . .22

3.3.18GPS:GYRO:CAL . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.3.19GPS:DYNAMic:MODE <int> [0,7] . . . . . . . . . . . . . . . . . . . 22

3.3.20GPS:DYNAMic:MODE 8 (Automatic Dynamic Mode) . . . . . . . . . . . 23

3.3.21GPS:DYNAMic:STATe? . . . . . . . . . . . . . . . . . . . . . . . 24

3.3.22GPS:REFerence:ADELay <float> <s | ns > [-32767ns,32767ns] . . . . . . .25

3.3.23GPS:REFerence:PULse:SAWtooth? . . . . . . . . . . . . . . . . . . 25

Micro-JLT GNSS™ User Manual

3.3.24GPS:RESET ONCE . . . . . . . . . . . . . . . . . . . . . . . . 25

3.3.25GPS:TMODe <ON|OFF|RSTSURV> . . . . . . . . . . . . . . . . . 25

3.3.26GPS:SURVey ONCE . . . . . . . . . . . . . . . . . . . . . . . 26

3.3.27GPS:SURVey:DURation <sec> . . . . . . . . . . . . . . . . . . . 26

3.3.28GPS:SURVey:VARIANCE <mm^2> . . . . . . . . . . . . . . . . . . 26

3.3.29GPS:HOLD:POSition <cm, cm, cm>. . . . . . . . . . . . . . . . . . 26

3.3.30GPS:SURVEY:STATUS? . . . . . . . . . . . . . . . . . . . . . . 26

3.3.31GPS:INITial:DATE <yyyy,mm,dd> . . . . . . . . . . . . . . . . . . 27

3.3.32GPS:INITial:TIME <hour,min,sec> . . . . . . . . . . . . . . . . . . 27

3.3.33GPS:SYSTem:SELect [GPS | SBAS | QZSS | GAL | BD ^ GLO] . . . . . . . 27

3.3.34GPS:JAMlevel? . . . . . . . . . . . . . . . . . . . . . . . . . . 27

3.3.35GPS:FWver? . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

3.3.36GPS?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

3.4 GYRO SUBSYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . 28

3.4.1 GYRO:MODE <ON|OFF> . . . . . . . . . . . . . . . . . . . . . . 28

3.4.2 GYRO:TRACE <int> [0,255]. . . . . . . . . . . . . . . . . . . . . 28

3.4.3 GYRO:CAL <float,float,float,float,float,float>. . . . . . . . . . . . . . . 28

3.4.4 GYRO:CAL:COMPUTE. . . . . . . . . . . . . . . . . . . . . . . 28

3.4.5 GYRO:SENS, GYRO:EFC, and GPS:CAL:RESET . . . . . . . . . . . . 28

3.4.6 GYRO:GLOAD? . . . . . . . . . . . . . . . . . . . . . . . . . 28

3.5 PTIME Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

3.5.1 PTIMe:DATE? . . . . . . . . . . . . . . . . . . . . . . . . . . 29

3.5.2 PTIMe:TIME? . . . . . . . . . . . . . . . . . . . . . . . . . . 29

3.5.3 PTIMe:TIME:STRing? . . . . . . . . . . . . . . . . . . . . . . . 29

3.5.4 PTIMe:TINTerval? . . . . . . . . . . . . . . . . . . . . . . . . . 29

3.5.5 PTIMe:OUTput <ON|OFF> . . . . . . . . . . . . . . . . . . . . . 29

3.5.6 PTIMe:LEAPsecond? . . . . . . . . . . . . . . . . . . . . . . . 30

3.5.7 PTIMe:LEAPsecond:PENDing? . . . . . . . . . . . . . . . . . . . 30

3.5.8 PTIMe:LEAPsecond:ACCumulated?. . . . . . . . . . . . . . . . . . 30

3.5.9 PTIMe:LEAPsecond:DATE? . . . . . . . . . . . . . . . . . . . . . 31

3.5.10PTIMe:LEAPsecond:DURation? . . . . . . . . . . . . . . . . . . . 31

3.5.11PTIMe:STAMp Subsystem . . . . . . . . . . . . . . . . . . . . . 31

3.5.12PTIMe:STAMp:MODE <OFF|ASYnc|MEMory|OUTput|DIFFer> . . . . . . . 32

3.5.13PTIMe:STAMp:SOURce <GPS|EXTernal|ALL> . . . . . . . . . . . . . 33

3.5.14PTIMe:STAMp:DIFFer <ALL|EXT|GPS> . . . . . . . . . . . . . . . . 34

3.5.15PTIMe:STAMp:FILTer [OFF | REL | DUR | PPS] . . . . . . . . . . . . . 34

3.5.16PTIMe:STAMp:FILTer:PPSecond <int> [1,100] . . . . . . . . . . . . . 36

3.5.17PTIMe:STAMp:FILTer:1PPeriod <int> [1,604800] . . . . . . . . . . . . 37

3.5.18PTIMe:STAMp:LAST? . . . . . . . . . . . . . . . . . . . . . . . 38

3.5.19PTIMe:STAMp:MEMory? . . . . . . . . . . . . . . . . . . . . . . 38

3.5.20PTIMe:STAMp:RESET . . . . . . . . . . . . . . . . . . . . . . . 38

3.5.21PTIMe:STAMp?. . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.5.22PTIMe? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.6 SYNChronization Subsystem . . . . . . . . . . . . . . . . . . . . . . . 39

3.6.1 SYNChronization:HOLDover:DURation? . . . . . . . . . . . . . . . . 40

3.6.2 SYNChronization:HOLDover:INITiate . . . . . . . . . . . . . . . . . 40

3.6.3 SYNChronization:HOLDover:RECovery:INITiate . . . . . . . . . . . . . 40

3.6.4 SYNChronization:SOURce:MODE <GPS|EXTernal|AUTO> . . . . . . . . 40

3.6.5 SYNChronization:SOURce:MODE:EDGE <NEGative|POSitive> . . . . . . . 41

3.6.6 SYNChronization:SOURce:STATE? . . . . . . . . . . . . . . . . . . 41

3.6.7 SYNChronization:HOLDover:STATE? . . . . . . . . . . . . . . . . . 42

3.6.8 SYNChronization:TINTerval? . . . . . . . . . . . . . . . . . . . . 42

Micro-JLT GNSS™ User Manual

3.6.9 SYNChronization:TINTerval:THReshold <int> [50,2000] . . . . . . . . . .42

3.6.10SYNChronization:IMMEdiate . . . . . . . . . . . . . . . . . . . . . 42

3.6.11SYNChronization:FEEstimate? . . . . . . . . . . . . . . . . . . . . 43

3.6.12SYNChronization:LOCKed? . . . . . . . . . . . . . . . . . . . . . 43

3.6.13SYNChronization:OUTput:1PPS:RESET <ON|OFF>. . . . . . . . . . . .43

3.6.14SYNChronization:OUTput:1PPS:RESET? . . . . . . . . . . . . . . . .43

3.6.15SYNChronization:OUTput:1PPS:WIDTH <int> <ms | us> [100us, 500ms] . . . 43

3.6.16SYNChronization:HEAlth? . . . . . . . . . . . . . . . . . . . . . . 44

3.6.17SYNChronization? . . . . . . . . . . . . . . . . . . . . . . . . .44

3.7 DIAGnostic Subsystem. . . . . . . . . . . . . . . . . . . . . . . . . . 45

3.7.1 DIAGnostic:ROSCillator:EFControl:RELative? . . . . . . . . . . . . . . 45

3.7.2 DIAGnostic:ROSCillator:EFControl:ABSolute? . . . . . . . . . . . . . .45

3.7.3 DIAGnostic:LIFetime:COUNt? . . . . . . . . . . . . . . . . . . . .45

3.7.4 DIAGnostic? . . . . . . . . . . . . . . . . . . . . . . . . . . .45

3.8 MEASURE Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . .46

3.8.1 MEASure:VOLTage? . . . . . . . . . . . . . . . . . . . . . . . . 46

3.8.2 MEASure:POWersupply? . . . . . . . . . . . . . . . . . . . . . . 46

3.8.3 MEASure:POWersupply:VOSCillator? . . . . . . . . . . . . . . . . . 46

3.8.4 MEASure? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

3.9 SYSTEM Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . 46

3.9.1 SYSTem:COMMunicate:SERial:ECHO <ON|OFF> . . . . . . . . . . . . 47

3.9.2 SYSTem:COMMunicate:SERial:PROmpt <ON|OFF> . . . . . . . . . . . 47

3.9.3 SYSTem:COMMunicate:SERial:BAUD <9600|19200|38400|57600|115200> . . 47

3.9.4 SYSTem:STATus? . . . . . . . . . . . . . . . . . . . . . . . . . 47

3.9.5 SYSTem:FACToryReset ONCE . . . . . . . . . . . . . . . . . . . 47

3.9.6 SYSTem:CPURESET. . . . . . . . . . . . . . . . . . . . . . . . 47

3.9.7 SYSTem:ISP . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

3.10SERVO Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . .48

3.10.1SERVo:FASTlock <int> [1,20] . . . . . . . . . . . . . . . . . . . . 48

3.10.2SERVo:FALEngth <int> [100,20000] . . . . . . . . . . . . . . . . . .49

3.10.3SERVo:COARSedac <int> [0,255] . . . . . . . . . . . . . . . . . . . 49

3.10.4SERVo:DACGain . . . . . . . . . . . . . . . . . . . . . . . . . 50

3.10.5SERVo:EFCScale <float> [0.0,500.0]. . . . . . . . . . . . . . . . . .50

3.10.6SERVo:EFCDamping <int> [2,4000] . . . . . . . . . . . . . . . . . . 50

3.10.7SERVo:SLOPe <NEG|POS> . . . . . . . . . . . . . . . . . . . . .50

3.10.8SERVo:TEMPCOmpensation . . . . . . . . . . . . . . . . . . . . . 50

3.10.9SERVo:AGINGcompensation <float> [-10.0,10.0] . . . . . . . . . . . . . 51

3.10.10SERVo:PHASECOrrection <float> [-500.0,500.0] . . . . . . . . . . . . 51

3.10.11SERVo:1PPSoffset <int> <ns> [-5000000,5000000] . . . . . . . . . . . 51

3.10.12SERVo:TRACe <int> [0,255] . . . . . . . . . . . . . . . . . . . . 51

3.10.13SERVo? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

4 Firmware Upgrade Instructions . . . . . . . . . . . . . . . . . . 53

4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

4.2 ISP Flash Loader Utility installation . . . . . . . . . . . . . . . . . . . . . 53

4.3 Putting the PCB into In-Circuit Programming (ISP) mode . . . . . . . . . . . . 53

4.4 Downloading the firmware . . . . . . . . . . . . . . . . . . . . . . . . 54

4.4.1 Using the JLTerm Programming Terminal . . . . . . . . . . . . . . . . 54

4.4.2 Using the Flash Magic Programming Utility . . . . . . . . . . . . . . . 57

4.4.3 Using the Flash Magic Classic Version . . . . . . . . . . . . . . . . . 58

4.5 Verifying Firmware Update . . . . . . . . . . . . . . . . . . . . . . . . 61

Micro-JLT GNSS™ User Manual

5 GPSCon Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

5.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

5.2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

5.3 Using GPSCon . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

5.3.1 Setting the options. . . . . . . . . . . . . . . . . . . . . . . . . 63

5.3.1.1 Communication Parameters . . . . . . . . . . . . . . . . . . 64

5.3.1.2 Auxiliary Parameters . . . . . . . . . . . . . . . . . . . . 64

5.3.1.3 Traces Parameters . . . . . . . . . . . . . . . . . . . . . 65

5.3.2 Sending manual commands to the receiver . . . . . . . . . . . . . . . 67

5.3.3 Using the Mouse in the Graph Window. . . . . . . . . . . . . . . . . 67

5.3.4 Exporting the graphics . . . . . . . . . . . . . . . . . . . . . . . 69

5.4 Interpreting the Data . . . . . . . . . . . . . . . . . . . . . . . . . . 70

6 Certification and Warranty . . . . . . . . . . . . . . . . . . . . 73

6.1 Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

6.1.1 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

6.1.2 Limitation of Warranty . . . . . . . . . . . . . . . . . . . . . . . 73

6.1.3 Exclusive Remedies . . . . . . . . . . . . . . . . . . . . . . . . 74

7 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . 75

7.1 Revision Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Micro-JLT GNSS™ User Manual

Introduction

1.1 Overview

The Micro-JLT GNSS™ board is the latest generation GNSDO™ product from Jackson Labs

Technologies, Inc. and is based on the popular Mini-JLT GPSDO product line. As an example,

Figure 1.1 displays an image of a single oven OCXO option for the Micro-JLT GNSS™. The

Micro-JLT GNSS™ supports three-concurrent multi-GNSS tracking by using a latest generation

concurrent GPS/Glonass/Galileo/BeiDou/QZSS/SBAS capable fixed-position GNSS timing

receiver, as well as optimizes phase noise performance, power supply consumption, cost, and

lead-time, while adding differential interfacing for robustness in adverse environmental conditions.

For the purposes of this discussion the word GNSDO is used interchangeably with GPSDO. The

board is designed for long life-time, high volume production with the industries’ lowest price point

in its class. The Micro-JLT GNSS™ is designed for fast warm-up with optimum stability with

excellent ADEV and Phase Noise performance for high-volume, low-cost applications that can

encounter the harshest environments.

The Micro-JLT GNSS™ GNSDO uses a multi-GNSS receiver that can run in stationary (Position

Hold) mode as well as 3D mobile mode to discipline either a single oven or optional double oven

OCXO local oscillator to better than 0.1ppb frequency accuracy typically. It supplies one 10MHz

output with ultra-low phase-noise, exceptional ADEV performance, and very low spurs and

harmonics. The board includes an RS-422/TTL control port for NMEA and SCPI communication,

and an LVDS 1PPS timing output driven by the on-board ultra-low-jitter holdover oscillator. The

board operates from a single +5.5V nominal supply with 5.2V to 6.0V range (a 5.0V +/-0.2V

operating range can be optionally ordered), and has connector pins to indicate GNSS and oscillator

LOCK and ALARM events. The board includes a high-performance GNSS receiver that can acquire

and track up to 72 GNSS signals down to a state of the art –167dBm (GPS and GLONASS), a

latest-generation low-power 32-bit processor that runs a Real Time OS, one 10MHz +8.5dBm Sine

Wave output, 1PPS UTC synchronized LVDS output, RS-422/TTL serial control interface, and

precision voltage references and DACs. The board also includes the latest generation multi-level

power supply management and conditioning for low power-consumption and extremely high

power-supply noise and stability rejection ratios. The Micro-JLT GNSS™ builds upon the legacy of

Jackson Labs Technologies, Inc. tens’ of thousands of fielded GPSDO units.

Micro-JLT GNSS™ User Manual

Figure 1.1 Micro-JLT GNSS™ SOCXO GNSDO

1.2 General Safety Precautions

The following general safety precautions must be observed during all phases of operation of this

instrument. Failure to comply with these precautions or with specific warnings elsewhere in this

manual violates safety standards of design manufacture, and intended use of the instrument. Jackson

Labs Technologies, Inc. assumes no liability for the customer’s failure to comply with these

requirements.

1.2.1 Antenna Lightning Protector

Always use a UL approved and properly installed GNSS Antenna Lightning protector on the coaxial

GNSS antenna feed to prevent damage, injury, and/or death in case of a lightning strike.

1.2.2 Grounding

To avoid damaging the sensitive electronic components in the Micro-JLT GNSS™ GNSDO always

make sure to discharge any built-up electrostatic charge to a good ground source, such as power

supply ground. This should be done before handling the circuit board or anything connected to it, i.e.

the GNSS antenna.

1.2.3 Power Connections

Make sure to connect the DC power to the device following the polarity indicated in Section 2.1 . Do

not reverse the power pins as this will cause serious damage to the circuit board.

Micro-JLT GNSS™ User Manual

1.2.4 Environmental Conditions

This instrument is intended for indoor use. It is designed to operate at a maximum relative

non-condensing humidity of 95% and at altitudes of up to 50,000 meters. Refer to the specifications

tables for the ac mains voltage requirements and ambient operating temperature range.

Micro-JLT GNSS™ User Manual

Jackson Labs Micro-JLT GNSS Manuale utente

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