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LC_1x1 User Manual - Jackson Labs Technologies, Inc.

1. Traces to be visible on the graph F EFC Mag Hold Min Max Filter Fil coeff Label Offset y M A OCXO cur fi fo r fo o3 r oos yeu Tas m3 o r 03 r po F sas Au f fo r fo 1023 0 05 5 3 1 3 Other options The other tabs in the options window can be selected and you can set whatever options you need such as paths for logging or exporting graphics 5 3 2 Sending manual commands to the receiver You can send SCPI commands manually by using the drop down box under the display window as shown in Figure 5 4 Care must be taken when sending these commands so be sure that the command that you select is supported by the LC 1x1 GPSDO Once you ve selected the command you can press Send to send it to the LC 1x1 46 2012 Jackson Labs Technologies Inc Jackson 7 Figure 5 4 Sending manual commands LC_1x1 User Manual amp GhsCon Utility Pro 6PSCon COM VdmLabs Fimware Rev 219 Lite HT ste r Stop Hide Status Time Map Graph Export Help About Hot Tracking 3 PRN 15 18 26 0CXO0 Current OK GPS Receiuer Status 3D 1PPS SOURCE MODE GPS GPSDO Status Locked El Az 2 147 7 261 4 118 Fix UTC 22 56 52 28 Oct 2616 LAT N 37 16 52 397 LON Y 121 59 15 645 74 16 m HSL DIAG LOG READ ALL DIAG LOG READ DIAG ROSC EFC ABS DIAG ROSC EFC REL Y Tl to DIAG TEMP F L DIAG TEST RES 99 1 DIAG TEST ALL Conti SPS INIT DATE yr mo
2. 3 2 2 IDN This query outputs an identifying string The response will show the following information O 2012 Jackson Labs Technologies Inc 13 LC 1x1 User Manual Jackson Labs company name model number serial number firmware revision 3 2 3 HELP This query returns a list of the commands available for the LC 1x1 GPSDO 3 3 GPS Subsystem Note Please note that LC 1x1 displays antenna height in MSL Meters rather than in GPS Meters on all commands that return antenna height the legacy Fury GPSDO uses GPS height The NMEA position fixes are in the WGS84 coordinate system while the X Y and Z velocity vectors are given in the ECEF coordinate system The GPS subsystem regroups all the commands related to the control and status of the GPS receiver The list of the commands supported is the following GPS SATellite TRAcking COUNt GPS SATellite V ISible COUNt GPS GPGGA lt int gt 0 255 GPS GGASTat int 0 255 GPS GPRMC int 0 255 GPS GPZDA lt int gt 0 255 GPS PASHR lt int gt 0 255 GPS GPGSV lt int gt 0 255 GPS GYRO GPS GYRO CAL GPS DYNAMic lt int gt 0 7 GPS REFerence ADELay float s ns gt 32767ns 32767ns GPS REFerence PULse SAWtooth GPS RESET ONCE GPS INITial DATE lt yyyy mm dd gt GPS INITial TIME lt hour min sec gt GPS JAMlevel GPS FW GPS 3 3 1 GPS SATellite This group of commands describe the satellite constellation 3 3 2 GPS SATellit
3. This command sets the period in seconds for the debug trace Debug trace data can be used with Ulrich Bangert s Plotter utility to show UTC tracking versus time etc This command has the following format SERVo TRACe int gt 0 255 An example output is described here 08 07 31 373815 60685 32 08 2 22E 11 14 10 6 0x54 date IPPS Count Fine DAC UTC offset ns Frequency Error Estimate Sats Visible Sats Tracked Lock State Health Status Please see the SYNChronization command for detailed information on how to decode the health status indicator values The Lock State variable indicates one of the following states 32 2012 Jackson Labs Technologies Inc Jackson Value State 0 OCXO warmup 1 Holdover 2 Locking OCXO training 4 Value not defined 5 Holdover but still phase locked stays in this state for about 100s after GPS lock is lost 6 Locked and GPS active 3 10 13 SERVo This command returns the result of the following queries SERVo COARSeDac SERVo DACGain SERVo EFCScale SERVo EFCDamping SERVo SLOPe SERVo TEMPCOmpensation SERVo AGINGcompensation SERVo PHASECOrrection SERVo 1PPSoffset SERVo TRACe 2012 Jackson Labs Technologies Inc LC_1x1 User Manual 33 LC 1x1 User Manual Jackson Labs 34 2012 Jackson Labs Technologies Inc Jackson LC_1x1 User Manual Labs Firmware Upgrade Instructions 4 1 Introduction The following
4. 2 41 4181 Options V Ti to GPS a E 08 0 157483 Update now a Log PU fi Client mode Last error Get sy me Continuously read error queue Flash LED 48 55 Jackson Labs FireFly l Firmware Rev 2 19 Life 440 D TI max ns 20 we j rT Fiter coeff 0 025 se Jr 2 Stop Span mins 15000 Ex Hide Mot Tracking 0 PRN El As ure 2 26 25 16 Nov 2010 LAT N 27 15 39 756 LON W 11 57 40 127 5 90 m MSL 18 02 47 15 11 10 UTC Receiver timeout servitar 2584 95 6348 7 66236 0 0054106 4 072305 0 00530379 scpi gt 2012 Jackson Labs Technologies Inc Jackson 7 Figure 5 6 Expanded Graph Display 7 GPSCon Utility Pro GPSCon COM8 Status Time Map Graph Export Help About LC 1x1 User Manual In ackson Labs FireFly ll Firmware Rev 2 19 Life en 02 38 51 16 11 10 EFC 2 414208 ad 0m sd 0 05m TI max ns 20 E 2 4144 8 159484 Temp r Filter coeff 0 025 Stat Span mins 15000 se Hide Not Tracking l PRN El z 15 1 40 n M dao VTC 1 35 45 16 Nov 010 LAT N 27 15 29 756 LON W 121 57 40 195 7 20 m MSL 0 Sat count 69 0 ns start 17 27 41 15 11 10 UTC Send serv tar y 18 02 47 15 11 10 UTC Receiver timeout z serv tar Log Status V Log sat count Translate time codes 2584 95 6348 7 66236 0 0054106 4 072305 0 00530379 Log EFC 2414209 Options scpi gt IV Tl te GPS Hr1E 0 0 158524 Log PU f Iu 2 Update no
5. 4 Exporting the graphics 49 5 4 Interpreting the Data DO 6 Certification and Warranty 51 6 1 Certification ll s s s s s s 51 6 1 1 Warranty 6 1 2 Limitation of Warranty eho e eae 4 Re o owe qnom SO 6 1 3 Exclusive Remedies 52 2012 Jackson Labs Technologies Inc 3 LC_1x1 User Manual Jackson abs 4 2012 Jackson Labs Technologies Inc Jackson LC_1x1 User Manual Introduction 1 1 Overview The LC_1x1 GPSDO is designed to be soldered into or plugged into a customer s PCB This reduces connection costs and improves signal integrety All signals but the GPS antenna are routed through two 100 mil standard through hole connectors The board includes an extremely high performance GPS receiver that can acquire and track up to 50 GPS signals down to a state of the art 158dBm a 32bit processor that runs a Real Time OS 10MHz LVDS or CMOS outputs 1PPS UTC synchronized LVDS or CMOS output RS 232 control interface and precision voltage references and DACs Figure 1 1 LC 1x1 Double Oven GPSDO 2012 Jackson Labs Technologies Inc 1 LC 1x1 User Manual Jackson Labs 1 2 General Safety Precautions The following general safety precautions must be observed during all phases of operation of this instru
6. Inc 41 LC 1x1 User Manual 42 Jackson ES O 2012 Jackson Labs Technologies Inc Jackson LC_1x1 User Manual Labs GPSCon Utility 5 1 Description GPSCon is a program for the monitoring and control of a variety of GPS time and frequency standard receivers It communicates with the receiver using the SCPI command set This utility can be obtained directly from Real Ham Radio com at the following URL http www realhamradio com gpscon buy now htm Important note On newer faster computers running Windows 7 GPSCon may not acquire data correctly If you encounter this problem it is recommended that you install GPSCon on a slower computer using Windows XP 5 2 Installation Follow the directions that come with GPSCon for installing the utility on your computer 5 3 Using GPSCon The GPSCon utility has a help file that should be consulted in order to get the full functionality of this utility Only a few of the features and commands are mentioned in this appendix for convenience 5 3 1 Setting the options To set up the options for your GPSCon session press the Options button below the display area The window shown in Figure 5 1 will appear You can select from the tabs which options you wish to set 2012 Jackson Labs Technologies Inc 43 LC 1x1 User Manual Figure 5 1 Options window Jackson ES amp GPSCon Utility Pro GPSCon COM INN HERR E r Logging and graph Time ILE
7. OCXO 3 6 10 SYNChronization OUTput 1PPS RESET ON OFF This command allows the generation of the 1PPS pulse upon power on without an external GPS antenna being connected to the unit By default the unit does not generate a 1PPS pulse until the GPS receiver has locked onto the Satellites With the command SYNC OUT 1PPS RESET ON the unit can now be configured to generate an asynchronous 1PPS output after power on even if a GPS antenna is not connected to the unit Once the GPS receiver locks the 1PPS pulse will align itself to UTC by stepping in 10 equally spaced steps toward UTC alignment The default setting is OFF which means the 1PPS pulse is disabled until proper GPS lock is achieved 3 6 11 SYNChronization health The SYNChronization health query returns a hexadecimal number indicating the system s health status Error flags are encoded in a binary fashion so that each flag occupies one single bit of the binary equivalent of the hexadecimal health status flag 26 2012 Jackson Labs Technologies Inc Jackson LC 1x1 User Manual The following system parameters are monitored and indicated through the health status indicator Individual parameters are ored together which results in a single hexadecimal value encoding the following system status information If the OCXO coarse DAC is maxed out at 255 If the OCXO coarse DAC is mined out at 0 If the phase offset to UTC is gt 250ns If the run time is 300 seconds If th
8. THEORY 52 2012 Jackson Labs Technologies Inc
9. Technologies Inc website under the following URL http www jackson labs com assets uploads main Z38XX zip 2 5 Loop parameter adjustment All loop parameters can be controlled via the RS 232 serial port Loop parameters are optimized for the OCXO on the board and changing the factory settings may result in the unit s performance to deteriorate The commands to control the loop parameters are part of the servo command See also the SERVO Subsystem section below The individual commands are EFC Scale this is the proportional gain of the PID loop Higher values will give quicker convergence and faster locking of the GPS time lower loop time constant lower values give less noise Values between 0 7 good double oven OCXO and 6 0 simple single oven OCXO are typical EFC Damping overall IIR filter time constant higher values increase loop time constant Jackson Labs Technologies Inc typically uses values between 10 to 50 Setting this value too high may cause loop instability Phase compensation this is the Integral part of the PID loop This corrects phase offsets between the LC 1x1 1PPS signal and the UTC 1PPS signal as generated by the GPS receiver Set higher values for tighter phase following at the expense of frequency stability Typical values range from 4 30 25 being the default Setting this value too high may cause loop instability A well compensated unit will show performance similar to the plot shown in Fig
10. adapter Caution use a Lightning Arrestor on your Antenna setup Use an amplified GPS antenna that is 5V LNA compatible The LC_1x1 GPS receiver is a 50 channel high sensitivity GPS receiver with very fast lock time It does not require any self survey or position hold mode auto survey and thus can be used in mobile platforms Please note that the LC_1x1 unit supports 5V antennae The LC_1x1 is capable of generating standard navigation messages see GPS GPGGA GPS GPZDA GPS PASHR and GPS GPRMC RS 232 commands that are compatible with most GPS based navigation software The GPS receiver generates a 1PPS time signal that is phase synchronized to UTC This 1 PPS signal is used to frequency lock the 10MHz output of the LC 1x1 GPSDO to UTC thus disciplining the unit s 10MHz frequency output to the US Naval master clock for very high frequency accuracy typically better than 10 digits of frequency accuracy when locked to GPS 2012 Jackson Labs Technologies Inc 9 LC_1x1 User Manual Jackson Labs 2 4 Remote serial control The unit is controlled via the Serial port at 115200 baud 8N1 Other Baud Rates can be set via SCPI commands Attach the LC 1x1 unit to your PC s Hyperterminal the optional GPSCon software package see Chapter 5 of this manual or a third party freeware Windows based application program called Z38xx The Z38xx program can be used to track the performance of the LC 1x1 Z38xx is available on the Jackson Labs
11. day 22 33 38 28 10 10 UTC Receiver timeout 22 38 48 28 10 10 UTC Receiver timeout 22 38 58 28 10 10 UTC Receiver timeout 22 40 07 28 10 10 UTC Receiver timeout 22 40 23 28 10 10 UTC Receiver timeout 22 42 17 28 10 10 UTC Receiver timeout Last error GPS INIT POS N deg min sec Ww deg min sec elev 4 5 3 3 Use of the mouse in graph mode Refer to Figure 5 5 for the following description In graph mode the span of the graph may be set using the span setting Alternatively the start and or stop time of the graph may be locked using the mouse Setthe start time by left clicking on the desired start point If you wish the stop time may also be locked by right clicking the desired stop point This can all be unlocked by left double clicking anywhere on the graph Double click always causes all of the selected span data to be displayed At the next update cycle the selected span if not set to zero will be enforced However the left click and if chosen the right click always overrides the span setting To display all of the data in the file without manually setting the span to zero you should right double click in the graph This has the effect of setting the start time to zero the stop time to infinity and asserting the mouse override condition To release left double click Since this is harder to describe than to actually do here is a paraphrase of the above To zoom in The mouse is used to set the le
12. is a short tutorial on how to upgrade the LC_1x1 GPSDO firmware Please follow the instructions in order to prevent corrupting the LC_1x1 Flash which may require reflashing at the factory With some practice the entire Flash upgrade can be done in less than one minute even though the following seems like a fairly long list of instructions 4 2 ISP Flash Loader Utility installation There are two Flash loader utilities available to upgrade the LC_1x1 firmware You can download the Philips LPC2000 utility from the Jackson Labs Technologies Inc website under the Support tab http www jackson labs com support html The Flash Magic utility is available for download on the Flash Magic website http www flashmagictool com 4 2 1 Philips LPC2000 Flash Utility The first is the Philips LPC2000 utility version 2 2 3 Please note that some computers are known to be incompatible with the LPC2000 flash utility Preliminary investigations show Windows Media Center and or Centrino vPro processor systems to create download difficulties Please use a different computer if you experience problems such as the download breaking up in the middle of the transfer Or alternatively you may use the Flash Magic programming tool Please ensure that you have at least version 2 2 3 of the LPC2100 flash utility installed Earlier versions may not recognize the LPC2138 processor used on the LC_1x1 boards 4 2 2 Flash Magic Flash Programming Utility The seco
13. options or measurements See Figure 5 3 for an example of an auxiliary measurement You will notice that the Aux 1 request string has been set to meas current CD and the Log Aux box is checked In the area below labeled Traces to be visible on the graph the box Aux 1 is checked and the label OCXO curr has been added O 2012 Jackson Labs Technologies Inc J a cks on bs LC_1x1 User Manual Figure 5 2 Setting the communications parameters GPSCon Utility Pro GPSCon COM4 he in diiit EC A Status Time Map Graph Export Help About PRN EL AZ SS f Options i s dialog Paths amp settings FTP Em C RTS CTS 2012 Jackson Labs Technologies Inc 45 LC 1x1 User Manual Jackson Labs Figure 5 3 Auxiliary Parameters window OUss TTS EL Paths amp settings FTP Email Coms Time services Audiary Aux coms Export graphics Remote control o cna Y 2nd port eror request string SYST ERR lt CR gt Enable second serial port 2nd port OK prompt scpi lt SPC gt gt lt SPC gt Wildcard for any character type is Wildcard for numeric character is Y Carriage retum is 2nd port error prompt E7 H gt lt SPC gt lt CR gt Linefeed is lt LF gt Aux request string meas curent lt CR gt M Log Axi or Log Max SS Aux2 request string FHDATAET7 lt CR gt Log Aux2 or Log MinSS Aux3 request string DATA E4 CR T Log Aux3
14. performance with an accuracy of only 5 Degrees is when any of the axis are at their 90 Degree angles this is due to the fact that a SIN g load calculation is done to generate the output normalized to Degrees and the vector is thus least sensitive at 90 Degree angles Acceleration can be measured with up to 3g range on all three axis Please note that since the tilt angle is calculated from the acceleration vectors using gravity that the tilt angles will actually exceed 90 Degrees when acceleration greater than 1g is applied 3 3 13 GPS GYRO CAL This command calibrates the output period of the Accelerometer data in g s per axis and in tilt in Degrees per axis Both offset and gain need to be calibrated on the unit to properly format the output of the three axis tilt to be 90 Degrees to 90 Degrees and the 0 Degree reference By default the unit is shipped with a normalized output of 0 Degrees Offset and a gain of 1 0 and the user will need to calibrate their unit in their system This command has the following format GPS GYRO CAL float float float float float float Calibration is accomplished by slowly tilting the unit on all six axis and measuring the maximum and minimum tilt indications in all six axis and writing these down on a piece of paper to calculate the calibration values Later firmware releases may automate this process 18 2012 Jackson Labs Technologies Inc
15. C frequency slope This command has the following format 2012 Jackson Labs Technologies Inc 31 LC 1x1 User Manual Jackson Labs SERVo SLOPe NEG POS gt 3 10 8 SERVo TEMPCOmpensation This parameter is a coefficient that reflects the correlation between the Current provided to the OCXO and the EFC This coefficient is automatically computed and adjusted over time by the Jackson Labs Technologies Inc firmware This command has the following format SERVo TEMPCOmpensation float 4000 0 4000 0 3 10 9 SERVo AGINGcompensation This parameter is a coefficient that represents the drift of the EFC needed to compensate the natural drift in frequency of the OCXO due to aging This coefficient is automatically computed and adjusted over time by the Jackson Labs Technologies Inc firmware This command has the following format SERVo AGINGcompensation float 10 0 10 0 3 10 10 SERVo PHASECOrrection This parameter sets the Integral part of the PID loop Loop instability will result if the parameter is set too high Typical values are 10 0 to 30 0 This command has the following format SERVo PHASECOrrection float 100 0 100 0 3 10 11 SERVo 1PPSoffset This command sets the LC 1x1 1PPS signal s offset to UTC in 16 7ns steps Using the SERV 1PPS command results in immediate phase change of the 1PPS output signal This command has the following format SERVo 1PPSoffset lt int gt ns 3 10 12 SERVo TRACe
16. Jackson LC 1x1 User Manual LC_1x1 User Manual Copyright 2010 2011 2012 2013 Jackson Labs Technologies Inc Jackson LC_1x1 User Manual Labs 1 Introduction 1 1 1 Overview 1 2 General Safety Precautions ET 2 1 2 1 Antenna Lightning Protector 2 1 2 2 Grounding zou 2 1 2 3 Power Connections 2 1 2 4 Environmental Conditions 2 2 Quick Start Instructions E 2 1 Powering Up the Unit 3 2 1 1 Ordering Options 4 2 1 2 PCB Photos 4 2 1 3 Mechanical Drawings 5 2 1 4 Notes on Signal Interfacing 8 2 1 5 Coaxial Connectors 9 2 2 Power 9 2 8 Connecting the GPS Antenna 9 2 4 Remote serial control 10 2 5 Loop parameter adjustment 10 3 SCPI Control Quick Start Instructions 13 3 1 Introduction DM ET 3 2 General SCPI Commands oo ne rS Ee EI a meld 3 2 1 Quick Start Commands 18 3 22 IDN 2 44 4 4 ee Ah Da d a 44 LE a De 44 x 40 3 2 3 HELP 4 x i Rok ds xxx xo de mode X Xo xcu wx 14 3 3 GPS Subsystem s s oa od sou na Vana 14 3 3 1 GPS SATellite ot El D wc m en ee eek Ww nm om 414 3 3 2 GPS SATellite TRAcking COUNt phage ER Ee x xo A n 3 x xs RTE 3 3 3 GPS SATellite VISible COUNt ll s rn 15 3 3 4 NMEA Support 15 3 3 5 GPSGPGGA 3 ss sosa w ad ea r
17. Jackson LC_1x1 User Manual Labs Example if the result for say the X axis is 87 Degrees to 93 Degrees then we need to remove an offset of 3 Degrees from the X axis while the gain of the X axis is properly set We would thus send the following calibration command to the unit GPS GYRO CAL 3 0 0 1 1 1 This will remove a 3 Degree offset from the X Axis and keep the Y and Z axis without offset or gain adjustments After the Offset is removed we may have to adjust the gain of the axis sensor For example if the range of the X Axis output is 82 Degrees to 78 Degrees then the axis has both an offset of 2 degrees and a gain error of 90 80 Degrees a factor of 1 125 Thus we need to add 2 Degrees offset and a gain of 1 125 The calibration command would thus look as follows GPS GYRO CAL 2 0 0 1 125 1 1 All three axis need to be calibrated simultaneously as shown above for the X Axis GPS GYRO CAL returns the setting of the calibration factors of the accelerometer system Due to the nature of the accelerometer chip the Z axis will have the largest error and lowest sensitivity of all three axis The X and Y axis will have the best resolution and highest sensitivity when the unit is sitting level horizontally 3 3 14 GPS DYNAMic This command allows the user to select the dynamic motion model being applied to the Kalmann filters in the GPS receiver This allows for larger amounts of filtering for lower velocity applicati
18. Powering Up the Unit PLEASE NOTE UNITS DELIVERED AFTER JULY 2013 OFFER AN OPTIONAL 3V BATTERY BACKUP FUNCTION ON PIN 2 FOR THE GPS RECEIVER WHICH ALLOWS FASTER STARTUP AND MAINTAINING TIME AND DATE WHEN THE MAIN POWER OF THE MODULE IS TURNED OFF USE AN EXTERNAL COIN CELL SUCH AS CR2025 OR CR2032 TO PROVIDE BACKUP POWER TO THE GPS ON PIN 2 OF THE MODULE CONNECT PIN 2 TO GROUND AS ON LEGACY UNITS IF THIS FEATURE IS NOT NEEDED To operate the unit simply follow these two steps 1 Connect a 5V compatible GPS antenna to MMCX connector J3 2 Connect 12V DC Power to pins 15 and 16 of the unit and ground to pins 9 and 14 3 If battery backup is desired connect a 2V to 3 6V CR2025 or similar backup battery to pin 2 to provide faster GPS lock after power on when using the RTC version 3 0 of the PCB only do this for units made in July 2013 and later deliveries The unit will now lock to GPS Red LED is blinking when satellites are being received and will indicate proper lock when the Green LED goes on Once the green LED is on the unit will output 10MHz with significantly better than 1ppb frequency accuracy Please note that the GPS receiver establishes the internal antenna gain right after power on so for proper operation the GPS antenna should always be connected prior to turning on the 12V power Connect a terminal program TeraTerm is recommended to the unit via the serial port with 115 2KB 8N1 and no flow control and try some of th
19. S Meters The difference between MSL and GPS height can be significant 35m or more are common 3 3 7 GPS GPRMC This command instructs the LC 1x1 to send the NMEA standard string GPRMC every N seconds with N in the interval 0 255 The command is disabled during the initial 7 minute OCXO warm up phase This command has the following format GPS GPRMC lt int gt 0 255 3 3 8 GPS XYZSPeed This command is a 3D velocity vector output command Enabling this command will output a 3 dimensional velocity vector indicating the unit s speed in centimeters per second in the ECEF coordinate system X Y and Z speed are individually given and are independent of each other An accuracy estimate in centimeters per second is also given The velocity data is time stamped using the time of week with a resolution of milliseconds Additionally the number of accrued Leapseconds is indicated in this message which allows proper calculation of GPS time from UTC time as indicated by other messages as well as proper handling of Leapsecond events Use the following format to generate the velocity vector every N seconds with N in the interval 0 255 GPS XYZSPeed lt int gt 0 255 3 3 9 GPS GPZDA This command instructs the LC_1x1 to send the NMEA standard string GPZDA every N seconds with N in the interval 0 255 The command is disabled during the initial 7 minute OCXO warm up phase This command has the following format GPS GPZDA
20. T 3 4 6 GYRO GLOAD PTIME Subsystem 3 5 1 PTIMe TZONe 3 5 2 PTIMe DATE 3 5 3 PTIMe TIME D 3 5 4 PTIMe TIME STRing 3 5 5 PTIMe TINTerval 3 5 6 PTIME i SYNChronization Subsystem m 3 6 1 SYNChronization HOL Dover DURation 3 6 2 SYNChronization HOLDover INITiate 3 6 3 SYNChronization HOLDover RECovery INITiate 3 6 4 SYNChronization SOURce MODE a 3 6 5 SYNChronization SOURce STATE 3 6 6 SYNChronization TINTerval 3 6 7 SYNChronization IMMEdiate 3 6 8 SYNChronization FEEstimate 3 6 9 SYNChronization LOCKed 3 6 10SYNChronization OUTput 1 PPS RESET IONOFFI 3 6 11SYNChronization health 3 6 12SYNChronization DIAGnostic Subsystem 3 7 1 DIAGnostic ROSCillator EFControl RELative 3 7 2 DlAGnostic ROSCillator EFControl ABSolute MEASURE Subsystem 3 8 1 MEASure VOLTage 3 8 2 MEASure CURRent 3 8 8 MEASure SYSTEM Subsystem 3 9 4 SYSTem COMMunicate EM 3 9 1 1 SYSTem COMMunicate SERial ECHO 3 9 1 2 SYSTem COMMunicate SERial PROmpt 3 9 1 8 SYSTem COMMunicate SERial BAUD 3 9 2 SYSTem STATus 3 9 3 SYSTem ic DN ONCE 3 10SERVO Subsystem 3 10 1SERVo FASTlock 3 10 28ERVo FALEngth 3 10 38ERVo COARSeDac 3 10 4SERVo DACGain 3 10 5SERVo EFCScale 3 10 6SERVo EFCDamping 3 10 7SERVo SLOPe 3 10 8SERVo TEMPCOmpensation 3 10 9SERVo AGINGcompensation 3 10 10SERVo PHASECOrrection 3 10 11SERVo 1PPSoffset 2012 Jackso
21. amic Mode The following table shows the Dynamic mode the unit will program into the GPS receiver when Automatic Mode is selected Dynamic Mode 8 In this Automatic mode the unit will configure the GPS based on the actual vehicle velocity Velocity Threshold Selected Dynamic Model Fallback to lower setting 0 2 knots Stationary none 22 knots Pedestrian knots gt 10 knots Automotive 8 knots 260 knots and 2400 Feet min Airborne 1g 50 knots climb descent 2150 knots Airborne 2g 130 knots 2240 knots Airborne 4g 210 knots 20 2012 Jackson Labs Technologies Inc Jackson LC_1x1 User Manual Labs Please note that in order to switch from the Automotive mode into the first Airborne 1g mode both a vehicle velocity greater than 60 knots as well as a climb descent rate greater than 400 feet per minute are required Without an appropriate climb descent the unit will remain in Automotive mode The following command returns the setting of the GPS dynamic model GPS DYNAMic Settings will be applied immediately to the GPS receiver and are stored in Non Volatile memory 3 3 16 GPS REFerence ADELay lt float gt lt s ns gt 32767ns 32767ns The ADELay command allows bi directional shifting of the 1PPS output in relation to the UTC 1PPS reference in one nanosecond steps This allows antenna cable delay compensation as well as retarding or advancing the 1PPS pulse arbitrarily Typ
22. ao e Pio 4 e lt 2 8 3 ST 9 x d H TS e Va 2 S o m xu ecu IT 6 e gt e e NNI g 1 e e ig he mal Ir a O f On Pee m e The following drawing shows the LC_1x1 pinout 6 2012 Jackson Labs Technologies Inc Jackson Figure 2 4 LC 1x1 Pinout 1 6000 0 1000 LC_1x1 User Manual 0062047 T 0 0950 010 Antenna O O MMCX 0 5500 0 5500 0 7050 R T 0 2000 j 0 1000 0 1000 1 HH52 15 Os 140 Q4 130 9000 Q5 120 Os nO O7 100 O8 9Q 11600 00500 H 00500 0 1400 qe 1 3100 0 7500 All dimensions in inches The connectors used on the LC_1x1 are made by Molex and have part number 22 28 4080 The connector pins can either be soldered into a customers PCB or inserted into a socket compatible to the Molex pins These pins have a plastic stand off height of 0 1 inches Components on the bottom side of the LC 1x1 module have a maximum height of 0 08 inches Table 2 1shows the LC 1x1 revision 3 0 hardware pin descriptions Table 2 1 LC 1x1 hardware connectors Ref Name Function Specification Description Pint LOCK_OK_OUT Status Indicator 3 3V LVCMOS LOCKED OV Event Indication LOCK EVENT indicator if low indicates an event that can be queried with the sync health command Pin2 VBAT RTC Battery backup for GPS receiver 2V to 3 6V max 3V nominal On boards delivered after Jul
23. ardware This string is supported in firmware version 2 41 and later and will output up to four strings of GPS satellite information with up to four satellites per string for a maximum of 16 satellites The unit s GPS receiver may track up to 50 satellites even though only 16 or less are shown at any given time SBAS WAAS EGNOS MSAS etc satellites are also counted and displayed by the GPGSV sentence This command has the following format GPS GPGSV int 0 255 2012 Jackson Labs Technologies Inc 17 LC_1x1 User Manual Jackson Labs 3 3 12 GPS GYRO This command sets up the output period of the Accelerometer data in g s per axis and in tilt in Degrees per axis The fastest period is 50ms 20 outputs per second achieved when setting the command to GPS GYRO 1 The resolution of this command is 1 20 of a second Setting the command to 0 disables the Accelerometer output This command has the following format GPS GYRO int 0 255 GPS GYRO returns the setting of the period of this command The output of the system is in six floating point numbers the acceleration on the X Y and Z axis in g s and the Tilt of the X Y and Z axis in Degrees 90 to 90 Please note that the Accelerometer has its best resolution and accuracy when the earth s gravitational acceleration is perpendicular to the axis to be measured Thus the sensors accuracy and resolution will be best when the tilt of any axis is around 0 Degrees The worst
24. e GPS is in holdover gt 60s If the Frequency Estimate is out of bounds If the OCXO voltage is too high If the OCXO voltage is too low HEALTH STATUS l 0x1 HEALTH STATUS Iz 0x2 HEALTH STATUS l 0x4 HEALTH STATUS I 0x8 HEALTH STATUS l 0x10 HEALTH STATUS l 0x20 HEALTH STATUS l 0x40 HEALTH STATUS l 0x80 If the short term drift ADEV 100s gt 100ns HEALTH STATUS l 0x100 For the first 7 minutes after a phase reset or a coarsedac change HEALTH STATUS l 0x200 If the GPS receiver indicates a strong jamming signal of gt 50 HEALTH STATUS l 0x800 range is 0 to 255 As an example if the unit is in GPS holdover and the OCXO voltage is too high and the UTC phase offset is gt 250ns then the following errors would be indicated 1 UTC phase 250ns 0x4 2 OCXO voltage too high 0x40 3 GPS in holdover 0x10 Oring these values together results in 0x40 0x10 0x4 0x54 The unit would thus indicate HEALTH STATUS 0x54 A health status of 0x0 indicates a properly locked and warmed up unit that is completely healthy 3 6 12 SYNChronization This query returns the results of these four queries SYNChronization SOURce MODE SYNChronization SOURce STATE SYNChronization LOCKed SYNChronization HOLDover DURation SYNChronization health O 2012 Jackson Labs Technologies Inc 27 LC 1x1 User Manual Jackson Labs 3 7 DIAGnostic Subsystem This subsystem regroups the queries related to t
25. e MODE The Source Mode command allows an optional external 3 3V level 1PPS input to be connected to the LC 1x1 board on connector harness U18 The unit can use this external 1PPS input instead of the internal GPS generated 1 PPS Switching to the external 1 PPS is either done manually with the EXT command option or automatically with the AUTO command option in case the GPS receiver goes into holdover mode for any reason The command has the following format SYNChronization SSOURce MODE GPSIEXTernallAUTO 2012 Jackson Labs Technologies Inc 25 LC 1x1 User Manual Jackson Labs 3 6 5 SYNChronization SOURce STATE This query shows the state of the external 1PPS synchronization option 3 6 6 SYNChronization TINTerval This query returns the difference or timing shift between the LC 1x1 1 PPS and the GPS 1 PPS signals The resolution is 1E 10 seconds 3 6 7 SYNChronization IMMEdiate This command initiates a near instantaneous alignment of the GPS 1 PPS and Receiver output 1 PPS To be effective this command has to be issued while not in holdover 3 6 8 SYNChronization FEEstimate This query returns the Frequency Error Estimate similar to the Allan Variance using a 1000s measurement interval and comparing the internal 1PPS to GPS 1PPS offset Values less than 1E 012 are below the noise floor and are not significant 3 6 9 SYNChronization LOCKed This query returns the lock state 0 0FF 12ON of the PLL controlling the
26. e TRAcking COUNt This query returns the number of satellites being tracked 14 2012 Jackson Labs Technologies Inc Jackson LC_1x1 User Manual Labs 3 3 3 GPS SATellite VISible COUNt This query returns the number of satellites PRN that the almanac predicts should be visible given date time and position 3 3 4 NMEA Support The following four commands allow the LC 1x1 GPSDO to be used as an industry standard navigation GPS receiver The GPGGA GPRM PASHR and GPZDA NMEA commands comprise all necessary information about the antenna position height velocity direction satellite info fix info time date and other information that can be used by standard navigation applications via the LC 1x1 RS 232 interface Once enabled LC 1x1 will send out information on the RS 232 transmit pin automatically every N seconds All incoming RS 232 commands are still recognized by LC 1x1 since the RS 232 interface transmit and receive lines are completely independent of one another Please note that the position direction and speed data is delayed by one second from when the GPS receiver internally reported these to the LC 1x1 Microprocessor so the position is valid for the 1PPS pulse previous to the last 1PPS pulse at the time the data is sent one second delay The time and date are properly output with correct UTC synchronization to the 1PPS pulse immediately prior to the data being sent Once set the following two commands will be
27. e correct COM port has been chosen etc O 2012 Jackson Labs Technologies Inc 37 LC 1x1 User Manual Jackson Labs Figure 4 2 LPC2000 flash download LPC2000 Flash Utility File Buffer Help LPC2000 Flash Utility V2 2 3 Flash Programming 4 r Erase Blank 4 r Communication Filename Connected To Port c ARM Fury_GPSDO Application mainFur Blank Check Entire Device COMI X Selected Sectors r aeiae pu Upload to Flash Za et SE c cts Start Sector 3 Ft T rase 34 Compare Flash Manual Rese End Seatot Time Out sec 2 Device Use DTR RTS Device LPC2106 Resa Part iD r for Reset and Boot Loader XTAL Freq kHz 10000 Device ID Boot Loader ID Selection EU Fi LPC2000 Flash Utility Reset Message Please reset your LPC2000 board now and then press OK OK Press the OK button and the download should start Sometimes the utility gets confused and this process from item 4 4 B has to be tried several times It is not necessary to press reset as the utility is asking Just press OK on the utility window s button Warning DO NOT PRESS THE ERASE BUTTON AT ANY TIME THIS WILL RENDER THE PCB USELESS AND CAN ONLY BE RECOVERED AT THE FACTORY 4 4 2 Flash Magic Flash Programming Utility A Open the Flash Magic utility Set the COM port in the Flash Magic application as needed on your PC Set Interface to None ISP 38 2012 Jackson Labs Tec
28. e to 1 0x Setting the FASTLOCK gain to 2 for example will result in the Proportional gain value stored in the SERVo EFCscale parameter to be multiplied by 2x initially after power on This dynamic gain is slowly reduced until the gain is back to 1 0x the value stored in the SERVo EFCScale parameter For example if we set SERVo FASTlock to 2 and SERVo FALEngth to 3600 and SERVo EFCScale is set to 0 7 Then initially the unit will multiply the EFCscale by 2x and an effective EFCscale value of 1 4 is applied to the PLL loop This increased gain value difference will be reduced every second by 1 3600 so that the gain after two seconds would be 1 3998 until after 3600 seconds the gain has been reduced back to its long term value of 0 70 as stored in the SERVo EFCscale parameter Disabling the FASTLOCK mode is accomplished by setting the SERVo FASTlock to 1 This will set the dynamic gain to 1 0 effectively disabling the fastlock feature This command has the following format SERVo FASTlock int 1 20 30 2012 Jackson Labs Technologies Inc Jackson LC_1x1 User Manual Labs 3 10 2 SERVo FALEngth This command adjusts the length of time during which the FASTLOCK feature is active please see the command SERVo FASTlock above It can be set from 100 seconds to 20 000 seconds The Dynamic FASTLOCK gain is slowly reduced until it reaches a gain of 1 0 after the FALEngth period of seconds During this time the PLL loop gain i
29. eDac int 0 225 SERVo DACGain int 0 1 10000 SERVo EFCScale lt float gt 0 0 500 0 2012 Jackson Labs Technologies Inc 29 LC_1x1 User Manual Jackson Labs SERVo EFCDamping lt float gt 0 0 4000 0 SERVo SLOPe NEG POS gt SERVo TEMPCOmpensation float 4000 0 4000 0 SERVo AGINGcompensation float 10 0 10 0 SERVo PHASECOrrection float 100 0 100 0 SERVo 1PPSoffset lt int gt ns SERVo QUIet ON OFF SERVo TRACe int 0 255 SERVo FASTlock int 1 20 SERVo FALEngth int 100 20000 SERVo 3 10 1 SERVo FASTlock The FASTlock command enables the FASTLOCK mode and sets its gain parameter Fastlock works by momentarily multiplying the EFCScale gain to a value determined by this SERVo FASTlock parameter Gain values of 1x to 20x can be set with a gain of 1x effectively disabling the FASTLOCK feature By selecting gain values of gt 1 the PLL loop parameter Proportional gain SERV EFCscale will be increased after power on thus increasing loop aggressiveness and improving lock PLL time It is not desirable to maintain a high loop gain for longer than necessary to lock the PLL since high loop gains come at the expense of increased phase noise reduced short term stability The FASTLOCK mechanism will automatically reduce the FASTLOCK gain over a period of time specified by the SERVo FALEngth command during which time the FASTLOCK gain is slowly decreased from its initial valu
30. ed low during power on Pin13 EXT 1PPS IN Input for external OV to 5V 15ns risetime Provides an external 1PPS input that SAASM etc GPS 1PPS can be enabled with the sync source mode command Pin14 Ground Ground Ground Ground Pin15 12V Power Main Power Input 12V 5 12V main power lt 0 7A Pin16 12V Power Main Power Input 12V 5 12V main power lt 0 7A 2 1 4 Notes on Signal Interfacing The LVDS signals 10MHz 1PPS should be routed using 100Ohm differential wiring twisted pair or two 500hm single ended coaxial cables with the shields being connected to ground Terminate these signals with 100 Ohm resistors between the positive and the negative wires The LOCK OK OUT is a 3 3 V LVCMOS signal and thus require a series resistor of typically 390 to 470 Ohms when used to drive an external LED Do not terminate the 10MHz LVCMOS and 1PPS LVCMOS outputs these are designed to drive 50 Ohms transmission lines or coax cables with 1M Ohms or higher DC input impedance at the end of the trace The serial port RX and TX lines can be directly connected to a DB9 connector pins 2 and 3 with pin 5 connected to Ground as these are driven with RS 232 signal levels 2012 Jackson Labs Technologies Inc Jackson LC_1x1 User Manual Labs Connect an active or passive L1 GPS antenna that is compatible to 5V antenna power and connect this antenna prior to turning on the board Use a lightning arrestor on the antenna feed f
31. er Manual Labs SYSTem COMMunicate SERial ECHO ON OFF SYSTem COMMunicate SERial PROmpt ON OFF SYSTem COMMunicate SERial BAUD 9600 19200 38400 57600 115200 SYS Tem STATus SYSTem FACToryReset ONCE 3 9 1 SYSTem COMMunicate 3 9 1 1 SYSTem COMMunicate SERial ECHO This command enables disables echo on RS 232 This command has the following format SYSTem COMMunicate SERial ECHO lt ON OFF 3 9 1 2 SYSTem COMMunicate SERial PROmpt This command enables disables the prompt scpi gt on the SCPI command lines The prompt must be enabled when used with the software GPSCon This command has the following format SYSTem COMMunicate SERial PROmpt ON OFF 3 9 1 3 SYSTem COMMunicate SERial BAUD This command sets the RS 232 serial speed The serial configuration is always 8 bit 1 stop bit no parity no HW flow control Upon Factory reset the speed is set at 115200 bauds This command has the following format SYSTem COMMunicate SERial BAUD 96001 19200 38400 57600 115200 3 9 2 SYSTem STATus This query returns a full page of GPS status in ASCII format The output is compatible with GPSCon 3 9 3 SYSTem FACToryReset ONCE This command applies the Factory Reset setting to the EEPROM All aging tempco and user parameters are overwritten with factory default values 3 10 SERVO Subsystem This subsystem regroups all the commands related to the adjustment of the servo loop SERVo COARS
32. ese SCPI commands help syst stat GPS 2012 Jackson Labs Technologies Inc 3 LC Ix1 User Manual Jackson sync meas 2 1 1 Ordering Options The LC_1x1 PCB can be ordered with the following options Single Oven OCXO or Double Oven OCXO with improved thermal stability and faster warmup SOCXO by default LVDS or 3 3V LVCMOS outputs for the 1PPS and 10MHz outputs LVDS by default Both the 1PPS and 10MHz outputs are either LVDS or CMOS they cannot be mixed and matched 3 Axis accelerometer to indicate tilt and acceleration of the unit Additional 10MHz LVDS output on pins TP1 and TP2 2 1 2 PCB Photos The LC_1x1 PCB Single Oven OCXO SOCXO is shown in Figure 2 1 Figure 2 1 LC_1x1 Single Oven PCB 4 O 2012 Jackson Labs Technologies Inc Jackson LC_1x1 User Manual Figure 2 2 LC_1x1 Double Oven PCB 2 1 3 Mechanical Drawings The following drawings show the mechanical dimensions and the pinout of the LC_1x1 PCB O 2012 Jackson Labs Technologies Inc 5 LC_1x1 User Manual Jackson Labs Figure 2 3 LC 1x1 Mechanical Dimensions 1 900 z o LN 7 alo mE Te m e 1 805 Le a A Miras Us cia NN HE raras ann C22 m m D mr U15 mm H MNEs vat m m 03 late i 1 350 a see E Mo i A m m e B mmm T o 77 m m i40 e z bd 4 el 0 E 2 y 0 e e 7 i e e S
33. ft extent and the right extent of the portion of the curve that the user wants to fill the screen Click once with the left mouse button on the point that marks the left side of what you want to be the magnified curve Immediately that point becomes the left end of the curve Then similarly click the right mouse button on the curve at the time you wish to be the right most portion of the magnified curve and it immediately becomes the end point on the right side And finally to return to the zoomed out fit to window view left double click on the curve 2012 Jackson Labs Technologies Inc 47 LC 1x1 User Manual Jackson Remember in order to see all the data in the log file you must either set the span control to zero or right double click in the graph When you have locked the start and stop time using the mouse you can scroll left or right through the data without changing the span To scroll to a later time use Shift Left click To scroll to an earlier time use Shift Right click Double left click to release everything The time span indication at the lower right of the graph will turn red to signify that mouse override is in effect Figure 5 5 Graph display 7 GPSCon Utility Pro GPSCon COM8 93 0 ns TI av 0 03n sd 11n 2 41396 0 A Sat count 77 0 ns 0 start 14 45 02 07 11 10 UTC 203 86 hrs Send serv tar hd Log Status v Log sat count Translate time codes M Log EFC
34. g Make sure NOT to press the erase button under any circumstances this may erase factory calibration data and the unit will not operate and will have to be returned to the factory Pressing the erase button on the ISP utility will thus void the warranty 36 2012 Jackson Labs Technologies Inc J a ck S on abs LC_1x1 User Manual Figure 4 1 LPC2000 flash utility f LPC2000 Flash Utility File Buffer Help PHILIPS LPC2000 Flash Utility V2 2 3 r Flash Programming Erase Blank r Communication Filename Connected To Port CAARM Fuy_GPSDO application mainF ur Blank Check Entire Device come Upload to Flash Execute Code Use Baud Rate pload to Flas PS ati 7 Start Sector 38400 z Selected Sectors atter Upload Erase Compare Flash Manual Reset tm Era Time Out sec 2 r Device Use DTR RTS Device Bad Part ip for Reset and Boot Loader TAL Freq kHz 10000 Device ID Boot Loader 10 Selection Please note that the Use Baud Rate setting needs to be set to 38400 Baud or less it will not work faster than 38400 Baud The DEVICE should show up as LPC2138 after pressing READ DEVICE ID Also please point the Filename to the directory where you have stored the latest firmware hex file that is to be downloaded D Start the download by pressing Upload to Flash button The following window should appear if th
35. he diagnostic of the OCXO The list of the commands supported for this subsystem is as follows DIAGnostic ROSCillator EFControl RELative DIAGnostic ROSCillator EFControl ABSolute 3 7 1 DIAGnostic ROSCillator EFControl RELative This query returns the Electronic Frequency Control EFC output value of the internal reference oscillator It returns a percentage value between 100 to 100 3 7 2 DIAGnostic ROSCillator EFControl ABSolute This query returns the Electronic Frequency Control EFC output value of the internal reference oscillator It returns a value in volts between 0 and 5 V 3 8 MEASURE Subsystem This subsystem regroups the queries related of some parameters that are measured on board on the LC_1x1 The list of the commands supported for this subsystem is the following MEASure VOLTage MEASure CURRent MEASure 3 8 1 MEASure VOLTage This query returns the power supply voltage applied to the OCXO ca 10 45 V 3 8 2 MEASure CURRent This query returns the current drawn by the OCXO This current varies in order to keep a stable temperature inside the OCXO 3 8 3 MEASure This query returns the result of the two following queries MEASure VOLTage MEASure CURRent 3 9 SYSTEM Subsystem This subsystem regroups the commands related to the general configuration of the LC_1x1 The list of the commands supported for this subsystem follows 28 2012 Jackson Labs Technologies Inc Jackson LC_1x1 Us
36. hnologies Inc Ja cks on bs LC_1x1 User Manual Figure 4 3 Flash Magic utility lagilagevm ieiamoo Ul Step 1 Communications Select Device LPC2138 Erase block 0 0x000000 0x000FFF 4 Erase block 1 0x001000 0x001FFF COM Port COM 4 Erase block 2 0x002000 0x002FFF Erase block 3 0 003000 0 003FFF Baud Rate 38400 Erase block 4 0x004000 0x004FFF piso Erase block 5 0X005000 0005FFF 10 Erase all Flash Code Ad Prot Oscillator MHz 7 Erase blocks used by Hex File Step 3 Hex File Hex File FireFly lA_2 19 hex Modified Unknown more info Verify after programming Fill unused Flash Gen block checksums Execute Your Training or Consulting Partner Embedded Systems Academy www esacademy com il B Press the Select Device button and the window shown in Figure 4 4 will appear 2012 Jackson Labs Technologies Inc 39 LC 1x1 User Manual Jackson Figure 4 4 Device selection window Flash Magic NON PRODUCTION USE ONLY File 1SP Options Tools Help EATA HOLC ARM Cortex LPC900 2 clock 80C51 80C51 KA Technical on line articles about 8051 and 4 programming www esacademy com fag docs C Expand the ARM folder and select the appropriate processor in this case the LPC2138 40 2012 Jackson Labs Technologies Inc J a cks on bs LC_1x1 User Manual Figure 4 5 Expanded device
37. holdover duration If the Receiver is not in holdover the response quantifies the previous holdover The second number in the response identifies the holdover state A value of 0 indicates the Receiver is not in holdover a value of 1 indicates the Receiver is in holdover 3 6 2 SYNChronization HOLDover INITiate The SYNC HOLD INIT and SYNC HOLD REC INIT commands allow the user to manually enter and exit the holdover state even while GPS signals are still being properly received This forced holdover allows the unit to effectively disable GPS locking while still keeping track of the state of the 1PPS output in relation to the UTC 1PPS signal as generated by the GPS receiver When the unit is placed into forced holdover with this command the unit will indicate the time interval difference between the 1PPS output and the GPS UTC 1PPS signal by using the SYNC TINT command This allows the user to see the OCXO drift when not locked to GPS for testing purposes or to prevent the GPS receiver from being spoofed and affecting the OCXO frequency accuracy All other frequency disciplining functions of the unit will behave as if the GPS antenna was disconnected from the unit while in this forced holdover state 3 6 3 SYNChronization HOLDover RECovery INITiate This command will disable the forced holdover state see the SYNC HOLD INIT command The unit will resume normal GPS locking operation after this command has been sent 3 6 4 SYNChronization SOURc
38. ical antenna delays for a 30 foot antenna cable with 1 5ns per foot propagation delay would be compensated with the following command GPS REF ADEL 45ns This command can be used to fine tune different units to have co incident 1 PPS pulse outputs Please note that during normal operation the 1PPS pulse may wander around the UTC 1PPS pulse while the unit is tracking the GPS signals The present offset between the 1PPS output and the UTC 1PPS signal can be queried with the command SYNC TINT and this offset should be taken into account when calibrating two unit s 1PPS outputs to each other since the lock algorithms will try to steer the OCXO for a 0 0ns offset to the UTC 1PPS time pulse 3 3 17 GPS REFerence PULse SAWtooth This command returns the momentary sawtooth correction factor that the GPS receiver indicated 3 3 18 GPS RESET ONCE Issues a reset to the internal GPS receiver This can be helpful when changing the antenna for example since the GPS receiver measures the antenna system s C No right after reset and adjusts its internal antenna amplifier gains accordingly It takes approximately 1 minute for locking to commence after a GPS reset as indicated by the red blinking LED 3 3 19 GPS INITial DATE lt yyyy mm dd gt Firmware revision 2 32 and later adds support for manually setting the time and date in the RTC in the event that no GPS signals are available This command allows setting the internal RTC DATE manually when operati
39. in other words the unit performs as well as a high quality Cesium Atomic reference clock over long periods of time The unit disciplines its internal 1OMHz reference to within less than 80ns peak to peak of UTC at all times which is less than one complete clock cycle at 10M Hz 50 2012 Jackson Labs Technologies Inc Jackson LC_1x1 User Manual Labs Certification and Warranty 6 1 Certification Jackson Labs Technologies Inc certifies that this product met its published specifications at time of shipment 6 1 1 Warranty This Jackson Labs Technologies Inc hardware product is warranted against defects in material and workmanship for a period of 1 one year from date of delivery During the warranty period Jackson Labs Technologies Inc will at its discretion either repair or replace products that prove to be defective Jackson Labs Technologies Inc does not warrant that the operation for the software firmware or hardware shall be uninterrupted or error free even if the product is operated within its specifications For warranty service this product must be returned to Jackson Labs Technologies Inc or a service facility designated by Jackson Labs Technologies Inc Customer shall prepay shipping charges and shall pay all duties and taxes for products returned to Jackson Labs Technologies Inc for warranty service Except for products returned to Customer from another country Jackson Labs Technologies Inc shall pa
40. int 0 255 3 3 10 GPS PASHR 16 The NMEA string PASHR POS has been added for compatibility to legacy GPS hardware The PASHR command alongside the GPZDA command will give all relevant parameters such as time date position velocity direction altitude quality of fix and more As an example the String has the following data format 2012 Jackson Labs Technologies Inc Jackson LC_1x1 User Manual Labs PASHR POS 0 7 202939 00 37 16 28369 N 12157 43457 W 00087 40 070 01 000 3 1 000 10 05 6 03 5 04 3 00 0 DD00 32 Please note that the length of the string is fixed at 115 characters plus the two binary OxOd Ox0a termination characters PASHR POS 0 aa bbbbbb 00 cccc ccccc d eeeee eeeee f ggsss ss hhhh iii ii j jj jj KKkk Kk ll l mm m mn n 00 0 p pp checksum Where aa Number of Sats bbbbbb 00 Time of Day UTC cecc ccccc d Latitude S N eeee eeeee f Longitude W E ggggg gg Antenna Height in meters hhhh Four fixed symbols kkkk k Vertical Velocity in meters s 1 1 PDOP mm mHDOP nn nVDOP 00 0Static number p pp Firmware Version 1 05 and above This command instructs the LC_1x1 to send the NMEA standard string PASHR every N seconds with N in the interval 0 255 The command is disabled during the initial 7 minute OCXO warm up phase This command has the following format GPS PASHR int 0 255 3 3 11 GPS GPGSV The NMEA string GPGSV has been added for compatibility to legacy GPS h
41. ment 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 GPS Antenna Lightning protector on the coaxial GPS 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 LC 1x1 GSPDO 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 GPS 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 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 2 2012 Jackson Labs Technologies Inc Jackson LC_1x1 User Manual Labs Quick Start Instructions 2 1
42. n Labs Technologies Inc Jackson LC_1x1 User Manual Labs 3 10 12SERVo TRACe 92 3 40 488ERVo soo eca r ll 89 4 Firmware Upgrade Instructions 35 4 1 Introduction Ae Heese woe ele 4 2 ISP Flash Loader Utility installation M 4 2 1 Philips LPC2000 Flash Utility ow uech ee hun Om A we X own HOD 4 2 2 Flash Magic Flash Programming Utility 24 OG Pe Robo Ro O 4 3 Putting the PCB into In Circuit dou ea mode ao vie a A oe OO 4 4 Downloading the firmware x fo o ae at a ac a a BE 4 4 1 Philips LPC2000 Flash Utility PAD dw inox bru a uum wis hw x 7 00 4 4 2 Flash Magic Flash d E utity 44 de mo o 4 sh SR 8 3e 7e 4x 2 08 4 5 Verifying Firmware Update ete a xe Ba ce ds ee eee 4 5 GPSCon Utility 48 5 1 Description s s amp x ox oso mow EUR ewe eo ee ee we Eom ee 43 5 2 Installation s a s a ee eae a re mom PE Roe ee ee ee 6 443 5 3 Using GPSCon a s s acs a soca so AB 5 3 1 Setting the options 5 3 1 1 Communication Parameters Do ed ea bia Ga boxe amp 4 x 2 44 5 3 1 2 Auxiliary parameters 44 5 3 1 3 Other options Eo ce ne w b dp s CH 546 5 3 2 Sending manual commands to the 1 receiver 46 5 3 3 Use of the mouse in graph mode 47 5 3
43. nd utility is the Flash Magic tool available on the Flash Magic website 2012 Jackson Labs Technologies Inc 35 LC 1x1 User Manual Jackson Labs http www flashmagictool com If the Philips LPC2000 tool doesn t work please use this one 4 3 Putting the PCB into In Circuit Programming ISP mode Momentarily short out the ISP pin 12 of the LC_1x1 board to ground during power on It may be useful to connect a push button to pin 12 and ground to allow in field firmware upgrades on the LC_1x1 PCB Both LED s should remain off indicating the unit is properly placed into ISP mode If the LED s light up after power on the unit is not in ISP mode 4 4 Downloading the firmware Download the latest version of LC_1x1 firmware from the Jackson Labs Technologies Inc support website and store it in a place that will be remembered The file is in hex format The unit needs to be connected to the computer s RS 232 serial port prior to firmware download Connect a DB 9 serial connector to the LC_1x1 as indicated in Section 2 1 2 4 4 1 Philips LPC2000 Flash Utility A Open the LPC2000 utility Set the COM port in the LPC2000 application as needed on your PC B Select the Baud Rate of the LPC2000 utility to be 38400 or slower Faster Baud rates will not work properly C Press the READ DEVICE ID button this should then show LPC2138 in the DEVICE window if the unit is communicating correctly to the application Warnin
44. ng the unit in GPS denied environments This command is compatible to the 2012 Jackson Labs Technologies Inc 21 LC 1x1 User Manual Jackson Labs PTIME OUT ON command described in section 3 5 5 to allow automatic time and date synchronization of two units to each other The internal RTC is driven by the highly stable CSAC 10MHz signal and thus has very high accuracy 3 3 20 GPS INITial TIME lt hour min sec gt Firmware revision 2 32 and later adds support for manually setting the time and date in the RTC in the event that no GPS signals are available This command allows setting the internal RTC TIME manually when operating the unit in GPS denied environments This command is compatible to the PTIME OUT ON command described in section 3 5 5 to allow automatic time and date synchronization of two units to each other The internal RTC is driven by the highly stable CSAC 10MHz signal and thus has very high accuracy 3 3 21 GPS JAMlevel Firmware revision 2 32 and later adds support for a GPS signal jamming indicator The GPS receiver will detect and flag jamming interference with levels ranging from 0 no jamming to 255 strong jamming Any level exceeding 50 and loss of the 1PPS signal from the GPS will cause a SYNC HEALTH 0x800 event to be flagged and the unit to disable the LOCK OUT OK signal on connector J1 3 3 22 GPS This query displays the configuration position speed height and other relevant data of the GPS recei
45. oa aua aa 16 3 3 6 GPS GGASTat a soa soca sta and m kon s A a w l l sls 15 3 8 7 GPS GPRMC s s 16 3 3 8 GPS XYZSPeed a 4 4 4 4 ae ow ovx 78 4 s VO 3 8 9 GPS GPZDA s 16 3 3 10GPS PASHR s e opo roe 2 ll sl s s s s 16 3 8141GPS GPGSV a edoae wos toa ls s s 17 3312GPS GYRO x 4 x De OX 3e ox xe XS ge xo x9 ox ox 18 3 3 13GPS GYRO CAL a sa a ss da os naos a ra sora a aa aa 18 3 3 14GPS DYNAMic pa dd dt mo xo 19 3 3 15GPS DYNAMic 8 Automatic Dynamic Mode P 2 20 3 3 16GPS REFerence ADELay float s ns gt 32767ns s 32767n6 ps A ox 2 3 3 17GPS REFerence PULse SAWtooth i amp cw 42 3 3 18GPS RESET ONCE A ae ENS LCR GE caes 4 RAR 3 3 19GPS INITial DATE lt yyyy mm dd ROS a yee eo TR SL ee ee te eed 3 3 20GPS INITial TIME lt hour min sec gt 22 3 3 21GPS JAMlevel a l l 22 3 3 22GP87 dos D 4 amp 4 does d qua D bu 422 3 4 GYRO SUBSYSTEM 22 2012 Jackson Labs Technologies Inc 1 LC_1x1 User Manual 3 5 3 6 3 7 3 8 3 9 3 4 4 GYRO MODE ON OFF gt 3 4 2 GYRO TRACE int 0 255 3 4 3 GYRO CAL lt float float float float float float 3 4 4 GYRO CAL COMPUTE 3 4 5 GYRO SENS GYRO EFC and GPS CAL RESE
46. ons effectively reducing noise Applications with high acceleration can now be used with fast filter settings to allow for the most accurate GPS coordinates to be provided in high dynamic applications such as Jet aircraft Firmware version 1 04 and later add an automated feature where the unit will select the GPS profile itself based on the unit s velocity This alleviates the user from having to track the state of a mission and manually selecting the best dynamic setting The command has the following syntax GPS DYNAMic int 0 8 2012 Jackson Labs Technologies Inc 19 LC_1x1 User Manual The following settings are available ksony Jac son h Value Model Application 0 Portable Recommended as a default setting 1 Stationary Used in stationary applications 2 Pedestrian Used in man pack pedestrian settings 3 Automotive Vehicular velocity applications 4 Sea Used on Ships where altitude is expected to be constant 5 Airborne 1g Airborne applications with less than 1g acceleration 6 Airborne 2g Airborne applications with less than 2g acceleration 7 Airborne 4g Airborne applications with less than 4g acceleration 8 Automatic Mode Select one of the above states 0 7 based on the actual velocity of the vehicle As an example sending the following command to the LC 1x1 will select a stationary GPS dynamic model gps dynam 1 3 3 15 GPS DYNAMic 8 Automatic Dyn
47. or safety and to prevent damage injury or death in case of a lightning strike 2 1 5 Coaxial Connectors The GPS antenna connector on the LC_1x1 board is a generic MMCX type 2 2 Power The unit is powered from a 11 0V to 14 0V DC source with 12 0V nominal voltage The current is typically less than 0 28A at 12V after warmup Connect a clean 12V power supply to pins 15 and 16 of the board Warning Do not reverse the polarity of the power pins this will damage the unit Starting in units made in July 2013 and later with PCB revision 3 0 a GPS receiver battery backup feature was added to the unit Pin 2 of the unit may now be used to supply a 3V nominal supply voltage from an external backup battery to maintain time date and the GPS almanac for faster startup after power on The unit will also indicate time and date after power on even without a GPS antenna connected since the GPS receiver has an internal RTC that is driven by the external backup battery Typical current consumption on pin 2 of the unit is 22uA when the 12V main power is turned off Connect pin 2 to ground as on legacy LC_1X1 units when the backup feature is not used DO NOT CONNECT A BATTERY BACKUP VOLTAGE TO PIN 2 OF BOARDS OLDER THAN A MANUFACTURING DATE OF JULY 2013 PCB REVISION lt 3 0 AS THIS WOULD CAUSE A SHORT CIRCUIT IN THE EXTERNAL BATTERY AND POSSIBLY POSE A FIRE HAZARD 2 3 Connecting the GPS Antenna Connect the GPS antenna to the BNC to MMCX cable
48. owly tilting the unit over 180 degrees on all three axis These values are written down on a piece of paper and the system calculates the required gain and offset parameters to scale the accelerometer output to 1g peak to peak scale and Og indication based on entering these values The GYRO CAL COMPUTE command will query the user for the maximum and minimum indicated g loads The GYRO TRACE 10 command can be used to help establish the g indications on the three different axis to aid in this calibration 3 4 5 GYRO SENS GYRO EFC and GPS CAL RESET Used for factory calibration of Gyro subsystem 3 4 6 GYRO GLOAD This command will return the present acceleration on the X Y and Z axis 3 5 PTIME Subsystem The PTIME subsystem regroups all the commands related to the management of the time The list of the commands supported is the following PTIMe TZONe PTIMe DATE PTIMe TIME PTIMe TIME STRing PTIMe TINTerval PTIME 2012 Jackson Labs Technologies Inc 23 LC 1x1 User Manual Jackson Labs 3 5 1 PTIMe TZONe Returns the local time zone offset 3 5 2 PTIMe DATE This query returns the current calendar date The local calendar date is referenced to UTC time The year month and day are returned 3 5 3 PTIMe TIME This query returns the current 24 hour time The local time is referenced to UTC time The hour minute and second is returned 3 5 4 PTIMe TIME STRing This query returns the current 24 ho
49. p Graph Export Help About Max kB 0 unlimited z Interval 130 A secs Blit from display Local HTML and image files HTML file c program files amp 86 gpscon gpsstat htm Browse Pixels 7 bitmap HTML update interval 30 y secs m Satellite tracking history file Track file c program files amp 86 gpscon gpsdmp bin Browse Max kB 0 unlimited 512 zd Span 2020 er mins 5 3 1 1 Communication Parameters Paths 4 settings FTP Email Coms Time services Auxiiary Aux coms Export graphics Remote control IV Log Status M Log EFC MN Log sat count M Tito GPS V Log PU MN Translate time codes Continuously read error queue Flash LED IV Use bitmap IV Statistics IV Show best fit to EFC ANSI font in status Tl max g ns Filter coeff 0 025 Before you can use GPSCon you must set the communication parameters for your system Open the dialog box by pressing the Options button Then select the Coms tab You will see the window shown in Figure 5 2 Select the correct COM port for your computer and set the baud rate to 115200 parity to None Data Bits to 8 and Stop Bits to 1 Set Flow Control to None Once you have configured the communication parameters press the OK button to close the window 5 3 1 2 Auxiliary parameters After pressing the Options button you can select Auxiliary and set other
50. s aging becoming faster in frequency over time This requires the control voltage to be lowered to maintain 10 0MHz exactly A drift of 2mV is visible over 200 hours On the left side of the screen the EFC range over this 200 hour plot is displayed vertically as 0 00193V This means the drift of the EFC voltage due to aging is 88mV per year The EFC sensitivity of the crystal is about 8Hz per volt so the crystal ages at 8Hz V 0 088V Year 0 704Hz Year drift At 10MHz 0 704Hz 1OMHz 7 04E 08 aging rate per year This is the same as 0 2ppb drift due to aging per day This crystal aging is fully compensated by the firmware with and without GPS reception of course The OCXO heater current is shown in turqoise We can see it ranges from 0 1356074 to 0 178146A The OCXO current jumps lower every 24 hours because the unit is sitting next to a window and the sun shines onto the OCXO in the evenings heating it up and thus making the unit use lower power during that event In Figure 5 6 which is a zoom of Figure 5 5 we can see the phase offset error of the internal OCXO to the UTC GPS reference We can see the maximum drift is 77ns to 93ns The average is TI av 0 03ns The standard deviation over the 200 hour plot is sd 11ns This means the average error of the 10MHz phase of this unit over 200 hours is only 11ns rms Or in other words the average jitter wander over 200 hours of operation is 11ns 200Hrs 1 528E 014 or
51. s increased by the amount specified in the SERVo FASTlock parameter which will result in a faster initial phase lock to UTC after power on while giving the lowest possible noise floor best short term stability during normal operation This command has the following format SERVo FALEngth int 100 20000 3 10 3 SERVo COARSeDac This command sets the coarse DAC that controls the EFC The LC 1x1 control loop automatically adjusts this setting The user should not have to change this value This command has the following format SERVo COARSeDac int 0 225 3 10 4 SERVo DACGain This command is used for factory setup 3 10 5 SERVo EFCScale Controls the Proportional part of the PID loop Typical values are 0 7 double oven OCXO to 6 0 simple single oven OCXO Larger values increase the loop control at the expense of increased noise while locked Setting this value too high can cause loop instabilities This command has the following format SERVo EFCScale lt float gt 0 0 500 0 3 10 6 SERVo EFCDamping Set s the Low Pass filter effectiveness of the DAC Values from 2 0 to 50 are typically used Larger values result in less noise at the expense of phase delay This command has the following format SERVo EFCDamping lt float gt 0 0 4000 0 3 10 7 SERVo SLOPe The parameter determines the sign of the slope between the EFC and the frequency variation of the OCXO This parameter should be set to match your OCXO s EF
52. selecion window File ISP Options Tools Help Guas3 vE wiuJgoo LPC2101 i LPC2102 i LPC2103 di LPC2104 LPC2105 di LPC2106 tib LPC2109 di LPC2114 di LPC2119 di LPC2124 SY LPC2129 tih LPC2131 LPC2132 ih LPC2134 PN Laaman n Line training classes for microcontrollers and embedded networking and Internetworking www esacademy com fag classes D Select the Baud Rate of the Flash Magic utility to be 38400 or slower Faster Baud rates will not work properly E Set the Oscillator MHz to 10 F Check the box marked Erase blocks used by Hex File Warning Make sure NOT to check the box marked Erase all Flash Code Rd Prot under any circumstances this may erase factory calibration data and the unit will not operate and will have to be returned to the factory Checking this box on the ISP utility will thus void the warranty G Under Step 3 Hex File browse for the hex file that you downloaded in step 4 4 H Go to Step 5 and press Start You wil observe the firmware being downloaded to the LC 1x1 4 5 Verifying Firmware Update Power cycle the unit with the pin 12 ISP pin left floating Both LED s should blink During power on the unit sends an ID string out of the serial port at 115200 Baud by default The firmware version can also be queried by sending the IDN command Verify that the firmware version is the version that was downloaded 2012 Jackson Labs Technologies
53. stored in NV memory and generate output information even after power to the unit has been cycled 3 3 5 GPS GPGGA This command instructs the LC 1x1 to send the NMEA standard string GPGGA every N seconds with N in the interval 0 255 The command is disabled during the initial 7 minute OCXO warm up phase This command has the following format GPS GPGGA lt int gt 0 255 GPGGA shows height in MSL Meters this is different from traditional GPS receivers that display height in GPS Meters The difference between MSL and GPS height can be significant 35m or more are common 3 3 6 GPS GGASTat This command instructs the LC 1x1 to send a modified version of the NMEA standard string GPGGA every N seconds with N in the interval 0 255 The command is disabled during the initial 7 minute OCXO warm up phase This command has the following format GPS GGASTat int 0 255 This command replaces the regular NMEA GGA validity flag with a decimal number indicating the lock state of the unit Please see section SERVo TRACe for a detailed description of the lock state 2012 Jackson Labs Technologies Inc 15 LC 1x1 User Manual Jackson Labs variable The command allows capture of the position and other information available in the GGA command as well as tracking the lock state and health of the unit s OCXO performance GGASTat shows height in MSL Meters this is different from traditional GPS receivers that display height in GP
54. ur time suitable for display for example 13 24 56 3 5 5 PTIMe TINTerval This query is equivalent to the command SYNChronization TINTerval 3 5 6 PTIME This query returns at once the result of the four following queries PTIME DATE PTIME TIME PTIME TZONE PTIME TINTerval 3 6 SYNChronization Subsystem This subsystem regroups the commands related to the synchronization of the LC 1x1 with the GPS receiver The list of the commands supported for this subsystem is the following SYNChronization SSOURce MODE GPSIEXTernallAUTO SYNChronization SOURce S TATE SYNChronization HOLDover DURation SYNChronization HOLDover STATe SYNChronization HOLDover INITiate SYNChronization HOLDover RECovery INITiate SYNChronization OUTput 1PPS RESET ONIOFF SYNChronization TINTerval 24 2012 Jackson Labs Technologies Inc Jackson LC_1x1 User Manual Labs SYNChronization IMMEdiate SYNChronization FEEstimate SYNChronization LOCKed SYNChronization 3 6 1 SYNChronization HOLDover DURation This query returns the duration of the present or most recent period of operation in the holdover and holdover processes This is the length of time the reference oscillator was not locked to GPS and thus coasting The time units are seconds The first number in the response is the holdover duration The duration units are seconds and the resolution is 1 second If the Receiver is in holdover the response quantifies the current
55. ure 2 5 when experiencing small perturbations 10 2012 Jackson Labs Technologies Inc Jacks On s LC 1x1 User Manual Figure 2 5 LC 1x1 phase compensation plot EFC 2 409962 ad 0m sd 0 07 m 3 Current 2 4098 0 075127 28 0 ns TI av21 03n sd 4 7 n Client mode T 2012 Jackson Labs Technologies Inc 11 LC 1x1 User Manual Jackson 12 O 2012 Jackson Labs Technologies Inc Jackson LC_1x1 User Manual Labs SCPI Control Quick Start Instructions 3 1 Introduction The SCPI Standard Commands for Programmable Instrumentation subsystem is accessed via the RS 232 interface and a terminal program By default the terminal settings are 115200 8N1 There are a number of commands that can be used as listed below Most of these are identical or similar to Symmetricom 58503A commands To get a listing of the available commands send the HELP query This will return a list of all the available commands for the LC_1x1 GPSDO Additional information regarding the SCPI protocol syntax can be found on the following web site http www scpiconsortium org Please refer to the document SCPI 99 pdf for details regarding individual SCPI command definitions A basic familiarity with the SCPI protocol is recommended when reading this chapter 3 2 General SCPI Commands 3 2 1 Quick Start Commands For a quick start try the following SCPI serial port commands help syst stat gps sync meas
56. ver in one convenient location 3 4 GYRO SUBSYSTEM The following Gyro commands are supported GYRO MODE lt ON OFF gt GYRO TRACE int 0 255 GYRO CALibrate lt float float float float float float gt GYRO CALibrate COMPute GYRO CALibrate RESET GYRO SENSitivity lt float float float gt GYRO EFC lt float gt GYRO GLOAD 3 4 1 GYRO MODE lt ON OFF gt Enables or disables electronic compensation This feature must be calibrated at the factory before it can be used 22 2012 Jackson Labs Technologies Inc Jackson LC_1x1 User Manual Labs 3 4 2 GYRO TRACE lt int gt 0 255 Similar to the GPS GYRO command Please see the GPS GYRO command for details 3 4 3 GYRO CAL lt float float float float float float gt Similar to the GPS GYRO CAL command Used to manually calibrate the gain and offset of the Accelerometer output Please see the GPS GYRO CAL command for details See also the GYRO CAL COMPUTE command for a semi automated calibration method 3 4 4 GYRO CAL COMPUTE This command can be used to automatically compute the offset and gain compensation of the accelerometer output for units that are not factory calibrated The goal is to have the unit indicate a range of 1 0g on all three axis when slowly rotated through the axis as well as 0 0g for any axis that is perpendicular to the earth s gravity The user must establish the minimum and maximum g loads that are displayed on all three axis by sl
57. w Continuously read error queue Flash LED Last error T 5 3 4 Exporting the graphics The settings which control the mode of the Export function are contained in the Options dialog Export allows you to create an image file of either the graph or the satellite map You select which you want using the radio buttons If you select Graph you have the option to export only that which is currently visible or to export the graph which is a plot of the entire logfile contents Use the checkbox AII to make this choice You may nominate a size in X and Y The file format may be BMP JPG GIF or PNG Your settings will be stored and will be the default next time you open this dialog If you choose to export the graph you might want to override the TI max setting in force on the screen display You may do this by entering a non zero value into the Override TT control A value of zero causes the export to take the same setting if any as the screen display The export may be done automatically on a timed basis Simply enter a non zero value in seconds to choose an export time interval To manually export in accordance with the settings press the Export button 2012 Jackson Labs Technologies Inc 49 LC_1x1 User Manual Jackson Labs 5 4 Interpreting the Data Figure 5 5 shows the data acquired by the LC_1x1 unit over a period of more than 200 hours The red trace is EFC crystal frequency control voltage The crystal i
58. y 2013 this pin can be used to supply an RTC Battery backup voltage for the GPS receiver allowing the GPS to maintain almanac time and date information for faster startup Connect to Ground if not used Pin3 1PPS LVDS 1PPS Signal LVDS 300mV differential Negative 1PPS LVDS output or NC when configured for LVCMOS output Pin4 1PP LVDS 1PPS Signal LVDS 300mV differential or 3 3V LVCMOS Positive 1PPS LVDS output or LVCMOS 1PPS output when configured for LVCMOS output 2012 Jackson Labs Technologies Inc LC_1x1 User Manual ksor Jac son h Pin5 Ground Ground Ground Ground Pin6 10MHz LVDS 10MHz Signal LVDS 300mV differential Negative 10MHz LVDS output or NC when configured for LVCMOS output Pin7 10MHz LVDS 10MHz Signal LVDS 300mV differential or Positive 10MHz LVDS outptu or 3 3V LVCMOS LVCMOS output when configured for LVCMOS output Pin8 Ground Ground Ground Ground Ping Ground Ground Ground Ground Pin10 TX RS 232 SCPI NMEA Serial port RS 232 115 2 8N1 Serial port for NMEA SCPI and firmware upgrading Pin11 RX RS 232 SCPI NMEA Serial port RS 232 115 2 8N1 Serial port for NMEA SCPI and firmware upgrading Pin12 ENTER_ISP Enable ISP firmware Internally pulled to 3 3V via Enables the ISP In System upgrade 4 7K resistor pull to ground Programming firmware upgrade during power on to activate mode when pull
59. y for return of products to Customer If Jackson Labs Technologies Inc is unable within a reasonable time to repair or replace any product to condition as warranted the Customer shall be entitled to a refund of the purchase price upon return of the product to Jackson Labs Technologies Inc 6 1 2 Limitation of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer Customer supplied software or interfacing unauthorized modification or misuse opening of the instruments enclosure or removal of the instruments panels operation outside of the environmental or electrical specifications for the product or improper site preparation and maintenance JACKSON LABS TECHNOLOGIES INC SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2012 Jackson Labs Technologies Inc 51 LC 1x1 User Manual Jackson Labs PURPOSE No license express or implied by estoppel or otherwise to any intellectual property rights is granted by this document Jackson Labs Technologies Inc products are not intended for use in medical life saving or life sustaining applications 6 1 3 Exclusive Remedies THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER S SOLE AND EXCLUSIVE REMEDIES JACKSON LABS TECHNOLOGIES INC SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL

LC_1x1 User Manual - Jackson Labs Technologies, Inc.

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