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RSR GNSS Transcoder™ User Manual

5.4.1 Using the 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)”.

Figure 5.2 Flash Magic Programming Utility

Содержание RSR GNSS Transcoder

Страница 1: ...RSR GNSS Transcoder User Manual Document 80200553 Version 1 1 Date 13 September 2017...

Страница 3: ...battery13 3 4 Connecting to a Users GPS Receiver 14 3 5 Mechanical Drawing 15 3 6 Major Features 16 3 6 1 Power Communication Connector J4 19 3 6 2 ISP SAASM Zeroize and RESET Connector J3 20 3 6 3 R...

Страница 4: ...E 44 4 3 9 SIMulation POSition LLH 44 4 3 10SIMulation POSition ECEF 44 4 3 11SIMulation POSition FILTer MODE 45 4 3 12SIMulation POSition FILTer LLH 45 4 3 13SIMulation POSition FILTer ECEF 45 4 3 14...

Страница 5: ...58 4 3 49SIMulation LNAV WRITE 59 4 3 50SIMulation LNAV EEPROM 59 4 3 51SIMulation LNAV ACTIVE 59 4 3 52SIMulation LNAV SELect 59 4 4 SIMulation 59 4 5 Output Subsystem 60 4 5 1 OUTput TEST 60 4 5 2...

Страница 6: ...ic Dynamic Mode 75 4 10 17GPS DYNAMic STATe 76 4 10 18GPS REFerence ADELay float s ns 32767ns 32767ns 76 4 10 19GPS REFerence PULse SAWtooth 76 4 10 20GPS RESET ONCE 76 4 10 21GPS TMODe ON OFF RSTSURV...

Страница 7: ...Mic STATe 89 4 11 17INTGPS REFerence PULse SAWtooth 89 4 11 18INTGPS RESET ONCE 89 4 11 19INTGPS JAMlevel 90 4 11 20INTGPS FWver 90 4 11 21INTGPS 90 4 12PTIME Subsystem 90 4 12 1PTIMe DATE 90 4 12 2PT...

Страница 8: ...ONCE 99 4 15 17CSAC 99 5 Firmware Upgrade Instructions 101 5 1 Introduction 101 5 2 ISP Flash Loader Utility Installation 101 5 3 Putting the PCB into In Circuit Programming ISP mode 101 5 4 Downloadi...

Страница 9: ...2017 Jackson Labs Technologies Inc vii RSR GNSS Transcoder User Manual 7 1 3 Exclusive Remedies 118...

Страница 10: ...RSR GNSS Transcoder User Manual viii 2017 Jackson Labs Technologies Inc...

Страница 11: ...e based on passive record and playback technology that is highly inflexible The RSR GNSS Transcoder is a full constellation fully integrated low SWaP C Real Time 10 channel GPS Simulator allowing tran...

Страница 12: ...second from an external source such as a GNSS receiver and encodes this PVT solution in less than 0 1s into a GPS L1 C A code signal which is compatible to any legacy GPS receiver including military G...

Страница 13: ...al generators for each GPS channel Tight coupling between the processor the FPGA and the timing reference allows real time encoding of PVT PNT data into a GPS L1 C A code RF signal Baseband IF signals...

Страница 14: ...ntenna it is only intended to be directly coupled into an RF input of a GPS receiver using shielded coax cables The RF output must not be amplified or re transmitted in any way without approval from t...

Страница 15: ...through the COM port installed on your computer with the USB connection to the RSR GNSS Transcoder 2 2 Power and Control Setup The power and control connection to the RSR GNSS Transcoder is made with...

Страница 16: ...ware configured to 115 200 baud no parity 8 data bits and 1 stop bit can be used Standard freeware terminal programs such as TeraTermPro or HyperTerm are available online for newer versions of Windows...

Страница 17: ...art stop control These commands are entered at the SCPI command prompt in the terminal program described in Section 2 2 Each command is terminated with a carriage return character Enter key For manual...

Страница 18: ...USB port with a 5V USB power bank When the power bank is connected the simulation will start as indicated by the PWR XT LED blinking at 5Hz The RF output from the RSR GNSS Transcoder is connected to...

Страница 19: ...2017 Jackson Labs Technologies Inc 9 RSR GNSS Transcoder User Manual Figure 2 2 DAGR Target Receiver with battery powered RSR GNSS Transcoder...

Страница 20: ...RSR GNSS Transcoder User Manual 10 2017 Jackson Labs Technologies Inc...

Страница 21: ...ls that would normally be present in a Live Sky GPS antenna feed The RSR GNSS Transcoder includes a USB port that can provide power to the unit alternatively a DC power source of 7V to 36V with 12V no...

Страница 22: ...s applied The RF output connector of the unit does not need to be terminated if unused however it is recommended to terminate the output to avoid leakage of GPS RF signals out of the coax connector Th...

Страница 23: ...of connector J4 is to provide a regulated power to an external GNSS receiver pin 11 of J4 can alternatively be used as a power input to the RSR GNSS Transcoder as well as the Rockwell RSR Puck or oth...

Страница 24: ...tput between 0V to 5 5V DC nominal on their antenna connector The RSR GNSS Transcoder uses an integrated 180 Ohms DC resistor to ground to simulate a suitable antenna load current for GPS receivers Re...

Страница 25: ...bs Technologies Inc 15 RSR GNSS Transcoder User Manual 3 5 Mechanical Drawing The following figure is a mechanical drawing of the RSR GNSS Transcoder module Figure 3 1 Mechanical Drawing of RSR GNSS T...

Страница 26: ...al 16 2017 Jackson Labs Technologies Inc 3 6 Major Features The major connections and features of the RSR GNSS Transcoder are shown in Figure 3 2 and Figure 3 3 Figure 3 2 Major connections of the RSR...

Страница 27: ...2017 Jackson Labs Technologies Inc 17 RSR GNSS Transcoder User Manual Figure 3 3 Major connections of the RSR GNSS Transcoder PCB Bottom Side...

Страница 28: ...Name Function Specification LED D5 FPGA LED FPGA Health Status Blinks slowly if FPGA is OK OFF System not initialized yet or fault detected LED D8 GNSS FIX OK External NMEA Fix Status ON Detection of...

Страница 29: ...ernal GNSS receiver RS 232 level serial port input from external NMEA source J4 4 GND System Ground Ground J4 5 GNSS_PWR_OF F External GNSS Power Control Output CMOS level Power Control output to exte...

Страница 30: ...and used to initialize ISP mode as well as an emergency zeroize button for the SAASM GPS receiver This pin has no effect during normal operation when the unit is connected to a commercial GNSS receive...

Страница 31: ...emi Symmetricom XLI units present on their antenna inputs may damage the unit due to overheating For products with excessive antenna voltage an RF DC block should be used on connector J5 3 6 4 Optiona...

Страница 32: ...n 2us per day thus allowing highly accurate time keeping when operating in GPS denied environments or when generating IS GPS 250A compatible Pseudolite signals for example Accrued phase and frequency...

Страница 33: ...kson Labs Technologies Inc 23 RSR GNSS Transcoder User Manual Figure 3 4 Optional RSR GNSS Transcoder IP 67 Water Proof Enclosure front Figure 3 5 Optional RSR GNSS Transcoder IP 67 Water Proof Enclos...

Страница 34: ...h the USB power cable so the cable must be able to momentarily provide 1A at 4 5V or higher Lower quality USB cables will cause excessive voltage drop and subsequent operational failures in the module...

Страница 35: ...ny industry standard male DB 15 VGA type connector may be used to provide power and communications to the unit however only water proof connectors with matching hoods will guarantee that the signals a...

Страница 36: ...accuracy during holdover is not required When using the ON mode and the position filter mode is set to INS the transcoded position continues to be updated based on a dead reckoning solution from the...

Страница 37: ...w input position and the time will jump to the precise time from the external 1PPS reference or from the internal oscillator when no 1PPS reference is present This mode is typically only used with the...

Страница 38: ...ng option 3 8 2 2 Connecting a uBlox GNSS Receiver The RSR GNSS Transcoder will also control products from uBlox viz uBlox generations 5 through 8 GPS and multi GNSS receivers The RSR GNSS Transcoder...

Страница 39: ...S LLH 2000 The simulated position will now move from 500 meters and stop at the newly commanded altitude of 2000 meters Any additional SIM POS LLH commands sent cause motion with the maximum defined d...

Страница 40: ...this manual the USER mode is not yet supported in the firmware Future releases of the RSR GNSS Transcoder firmware will included support for the USER mode and SIM LNAV commands Also the Jackson Labs...

Страница 41: ...to be enabled and visible in the simulated RF output To set the mask angle use the SIMulation SV MASK command For example to specify a 10 degree mask angle use the command SIM SV MASK 10 The angle ca...

Страница 42: ...ximum dynamics Target receiver maximum dynamics In the INS position filtering mode and transcoding position mode the onboard IMU provides additional filtering and interpolation between input position...

Страница 43: ...put and the GPS target receiver OUT OFFset 10dB OUT POW 130dBm Because of the compensation for the 10 dB attenuator the output power at the SMA connector of the RSR GNSS Transcoder s is offset to be 1...

Страница 44: ...d start the target receiver as the simulation will accurately transmit UTC time date to the target receiver and thus fulfill any assumptions the target receiver would have about the current time date...

Страница 45: ...r event enter the following commands SIM MODE MANUAL SIM TIME START TIME 23 30 00 SIM TIME START DATE 2019 4 6 SIM COMMAND START The simulation will start 30 minutes before the event and continue inde...

Страница 46: ...oofing test the output power is increased from 125dBm with the OUT POWer command until the output power is greater than the mixed live sky signals Without an external amplifier the output power can be...

Страница 47: ...with commands such as SERV SYST STAT GPS and others Details of each GPS command are available in Section 4 10 3 The RSR GNSS Transcoder also includes an internal GNSS receiver for monitoring the trans...

Страница 48: ...d this firmware can only be loaded at the Rockwell Collins factory and is only available to JLT customers The GPS DAGR MODE command described in Section 4 10 32 enables and disables the DAGR Pass Thro...

Страница 49: ...program such as TeraTerm or HyperTerminal By default the terminal settings are 115200 8N1 no flow control The SCPI interface can be used to query status of the unit generate NMEA compatible output sen...

Страница 50: ...oder 4 3 Simulation Subsystem The Simulation subsystem groups all of the commands associated with controlling the simulation and transcoding features The list of commands supported is the following SI...

Страница 51: ...IMulation TIME START TIME SIMulation TIME START DATE SIMulation TIME LEAPsecond ACCumulated SIMulation TIME LEAPsecond DATE SIMulation TIME LEAPsecond DURation SIMulation TIME UTCoffset A0 SIMulation...

Страница 52: ...ode The SIM COM START and SIM COM STOP commands can also be used in other simulation modes The command has the following format SIMulation COMmand START STOP 4 3 3 SIMulation STATe This query responds...

Страница 53: ...state indicates that the transcoding PVT is based on the local oscillator s holdover performance and or the INS dead reckoning if operating in the INS simulation position filter mode 4 3 6 SIMulation...

Страница 54: ...d not height above Mean Sea Level MSL The format of this command is SIMulation POSition LLH lat lon alt where latitude and longitude are in degrees and altitude is in meters The fields are separated b...

Страница 55: ...s using the VMAX AMAX and JMAX parameters in the commands described in Sections 4 3 14 4 3 15 and 4 3 16 As of the release of this manual only the OFF and DYNAMIC modes are supported Future releases o...

Страница 56: ...command string Valid starting line numbers are 1 through 100 The final command must always be END which stops the RF output When a syntax error occurs with a motion command an Command Error message i...

Страница 57: ...specified in the Dynamics DYN command Because the Dynamics command can signficantly affect the resulting motion defined by a series of commands it is highly recommended that the Dynamics command be t...

Страница 58: ...It should be used as the second Motion Command after the Dynamics command in a series of commands The format of this command is REF latitude longitude altitude heading speed where latitude is in degr...

Страница 59: ...The combination of the current speed and lateral acceleration will determine the radius of the curve and the time required to complete the turn The format of this command is TURN heading change latera...

Страница 60: ...celeration and change in speed Since with a constant lateral acceleration the turning radius is affected by the current speed and the current speed is changing with acceleration the turning radius wil...

Страница 61: ...quickly as possible to the end location while limited to the maximum dynamics in the Dynamics command The format of this command is HALT latitude longitude altitude where latitude is in degrees longit...

Страница 62: ...used in the simulation wn and tow are the GPS week number and time of week update count is the 10 Hz simulation update count starting at 0 state is the simulation state see table below and sat count i...

Страница 63: ...simulation PRNs must be excluded individually with separate SIM SV EXCL commands PRNs can also be individually removed from the exclude list by specifying a negative PRN number This parameter is store...

Страница 64: ...TART commands at the begining of first simulation run If the simulation is stopped and started again the selected set time will be propgated by the local receiver The format of this command is SIMulat...

Страница 65: ...simulated This command provides a simplified method of setting the UTC correction parameters in the SIM TIME UTC commands This parameter is stored in NV memory and automatically applied after power on...

Страница 66: ...is stored in NV memory and automatically applied after power on The parameter is defined in the IS GPS 200 specification The format of this command is SIMulation TIME UTCoffset WNT wnt 4 3 40 SIMulati...

Страница 67: ...PS navigation message This parameter is stored in NV memory and automatically applied after power on The parameter is defined in the IS GPS 200 specification The format of this command is SIMulation I...

Страница 68: ...olatile memory This command is normally only used by the JLT Windows application available in late 2017 The format of this command is SIMulation LNAV EPHemeris prn subframe word data The following des...

Страница 69: ...eturned one at a time in the form of individual SIM LNAV EPH and SIM LNAV ION commands 4 3 51 SIMulation LNAV ACTIVE The SIM LNAV query returns a list of all ionospheric UTC and ephemeris parameters a...

Страница 70: ...4 5 1 OUTput TEST This command enables the test signal mode on the SMA RF output that can be used for calibration spectrum analyzer tests RF front end testing or as a jamming test signal The signal a...

Страница 71: ...he surface of the earth is typically about 125 dBm but is often a few dB higher to accomodate for a reduction in power as the satellite ages Target GPS receivers are also often expecting an amplified...

Страница 72: ...Hz 4 6 Calibration Subsystem The Calibration Subsystem is used for factory calibration of the output power and should not be user modified Please contact JLT for information on recalibrating the outpu...

Страница 73: ...er with this command the unit will indicate the time interval difference between the 1PPS output and the GNSS receiver 1PPS by using the SYNC TINT command up to a limit of 2000ns This allows the user...

Страница 74: ...requently in environments where airflow or thermal changes are expected especially on units without the CSAC option 4 7 8 SYNChronization IMMEdiate This command initiates a near instantaneous alignmen...

Страница 75: ...oltage too high 0x40 3 GNSS receiver in holdover 0x10 Oring these values together results in 0x40 0x10 0x4 0x54 If the OCXO coarse DAC is maxed out at 255 HEALTH STATUS 0x1 If the OCXO coarse DAC is m...

Страница 76: ...Gnostic ROSCillator EFControl RELative DIAGnostic ROSCillator EFControl ABSolute DIAGnostic LIFetime COUNt 4 8 1 DIAGnostic ROSCillator EFControl RELative This query returns the Electronic Frequency C...

Страница 77: ...ith optional CSAC 4 9 3 MEASure POWer This query returns the power supply voltage applied to the prime power input 7V to 36V 4 9 4 MEASure POWer V12 This query returns the internally regulated 1 2V su...

Страница 78: ...ee Section 4 10 1 for details on setting and querying the GPS type The list of the commands supported by Generic receivers is the following GPS TYPE GPS TYPE MODE AUTO UBLOX ROCKWELL NMEA GPS SATellit...

Страница 79: ...RT GPS ZEROize 4 10 1 GPS TYPE This command queries the current externally connected GNSS type The response is one of the following UBLOX ROCKWELL or NMEA The GPS type is set automatically when in GPS...

Страница 80: ...the GPGSV output uses a modified satellite numbering scheme as detailed in Section 4 10 9 to allow multiple and possibly concurrent GNSS system satellites to be differentiated in the GPGSV message Ple...

Страница 81: ...mand instructs the RSR GNSS Transcoder to send the NMEA standard string GPGSV every N seconds with N in the interval 0 255 The command is disabled until the GNSS receiver achieves a first fix GPS GPGS...

Страница 82: ...kk ll l mm m nn n 00 0 p pp checksum Where aa Number of Sats bbbbbb 00 Time of Day UTC cccc ccccc d Latitude S N eeee eeeee f Longitude W E ggggg gg Antenna Height in meters hhhh Four fixed symbols i...

Страница 83: ...ceiver and reported based on the height delta at the simulated GPS position 4 10 13 GPS HEIGHT GPS This query returns the height above the GPS ellipsoid in meters at the currently simulated GPS positi...

Страница 84: ...e two GPS TMODE Auto Survey Position Hold modes is selected the GPS DYNAMIC MODE command is disabled internally and its setting is ignored as the unit does not expect any motion on the antenna In this...

Страница 85: ...elocity 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...

Страница 86: ...his command is only supported with an externa uBlox GNSS receiver 4 10 18 GPS REFerence ADELay float s ns 32767ns 32767ns The ADELay command allows bi directional shifting of the 1PPS output in relati...

Страница 87: ...y sequence the uBlox GNSS receiver will run with the timing features enabled Once in Position Hold mode the antenna location should be held completely stationary This command is only supported with an...

Страница 88: ...e 4 10 28 GPS INITial TIME hour min sec This command allows manual setting of the internal RTC TIME when operating the unit in GNSS denied environments This command is compatible to the PTIME OUT ON c...

Страница 89: ...lace of locally computed PVT data from the internal MicroGRAM The GPS DAGR PVTstate query response described in Section 4 10 35 indicates if the MicroGRAM has successfully transitioned to DAGR pass th...

Страница 90: ...k 4 10 36 GPS SASTAT YTRACK This query displays the number of satellites being tracked in Y Code If the MicroGRAM or RSR Puck is not keyed this value should always be 0 The maximum value is 12 This co...

Страница 91: ...ll Collins MicroGRAM or RSR Puck 4 10 39 GPS SASTAT CVStatus This query displays the CV Status using the values in the following table This command only works with an external Rockwell Collins MicroGR...

Страница 92: ...Transcoder to send the SASTAT proprietary NMEA output sentence every N seconds with N in the interval 0 255 The command is disabled during the initial oscillator warm up phase This command has the fo...

Страница 93: ...the GPS SASTAT CVZStatus query described in Section 4 10 37 This command only works with an external Rockwell Collins MicroGRAM or RSR Puck 4 10 47 GPS This query displays the configuration position...

Страница 94: ...avigation applications or as a comparison with the simulation results from the target GPS receiver Once enabled the RSR GNSS Transcoder will send out information on the USB serial interface automatica...

Страница 95: ...d is disabled until the internal GNSS receiver achieves a first fix This command has the following format INTGPS GPRMC int 0 255 4 11 7 INTGPS GPGSV This command instructs the RSR GNSS Transcoder to s...

Страница 96: ...direction altitude quality of fix and more As an example the String has the following data format PASHR POS 0 7 202939 00 3716 28369 N 12157 43457 W 00087 40 070 01 000 31 000 10 05 6 03 5 04 3 00 0 D...

Страница 97: ...ated position This GPS height should reflect the simulated height as set in the simulation commands such as the SIM POS LLH command described in Section 4 3 9 4 11 13 INTGPS HEIGHT This command return...

Страница 98: ...is selected Dynamic Mode 8 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 Automoti...

Страница 99: ...ceiver and are stored in Non Volatile memory 4 11 16 INTGPS DYNAMic STATe This query returns the actual state of the dynamic model chosen by the firmware to be applied to the internal GNSS receiver de...

Страница 100: ...nternal monitoring GNSS receiver in one convenient location 4 12 PTIME Subsystem The PTIME subsystem groups all the commands related to the management of the internal RTC time including simulation tim...

Страница 101: ...erate GPS INIT DATE and GPS INIT TIME sentences on the USB serial port once per second 4 12 5 PTIMe LEAPsecond This command returns the results of the four following queries PTIMe LEAPsecond PENDing P...

Страница 102: ...the RSR GNSS Transcoder The list of the commands supported for this subsystem follows SYSTem COMMunicate SERial ECHO ON OFF SYSTem COMMunicate SERial PROmpt ON OFF SYSTem COMMunicate SERial BAUD 9600...

Страница 103: ...urns the serial number of the unit 4 13 6 SYSTem ID HWrev This query returns the Hardware version of the module 4 13 7 SYSTem STATus This query returns a full page of external GNSS receiver status in...

Страница 104: ...the PID loop Typical values are 0 5 to 3 0 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...

Страница 105: ...RSR GNSS Transcoder 1PPS signal s offset to UTC in 5 6ns steps Using the SERV 1PPS command results in immediate phase change of the 1PPS output signal This command has the following format SERVo 1PPS...

Страница 106: ...abled when the power is set to OFF at which point the CSAC will disable all its internal circuitry and the module will operate as a TCXO based unit The default setting is ON When the CSAC power is OFF...

Страница 107: ...ering 2 Microwave Frequency Stabilization 3 Microwave Frequency Acquisition 4 Laser Power Acquisition 5 Laser Current Acquisition 6 Microwave Power Acquisition 7 Heater equilibration 8 Initial warm up...

Страница 108: ...age 0 2 5 VDC tuning range 10 ppm 4 15 10 CSAC SIGnal This query returns the indication of signal level 4 15 11 CSAC HEATpackage This query returns the Physics package heater power typically 15mW unde...

Страница 109: ...he last factory reset of the RSR GNSS Transcoder board The value is stored in the external NVRAM and updated every hour when the CSAC is powered on 4 15 16 CSAC STeer LATch ONCE This command stores th...

Страница 110: ...RSR GNSS Transcoder User Manual 100 2017 Jackson Labs Technologies Inc...

Страница 111: ...n the RSR GNSS Transcoder It is available for download on the Flash Magic website http www flashmagictool com Follow the directions given on the website for installing the utility on your computer Not...

Страница 112: ...file is in hex format The unit needs to be connected to the computer s USB serial port prior to firmware download Connect a USB cable to USB connector J2 on the RSR GNSS Transcoder This will provide p...

Страница 113: ...S Transcoder User Manual 5 4 1 Using the 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...

Страница 114: ...ic may not be able to communicate properly to the processor Open the Options and Advanced Options tabs on the application Please ensure that the Use My Line Feed Settings Send Line Feeds and Expect Li...

Страница 115: ...2017 Jackson Labs Technologies Inc 105 RSR GNSS Transcoder User Manual Figure 5 4 Device selection window C Expand the ARM CORTEX folder and select the appropriate processor in this case the LPC18S37...

Страница 116: ...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 st...

Страница 117: ...om index php support 6 2 Installation Extract the contents of the ZIP file downloaded from the Jackson Lab s website and execute the MSI installer Follow the on screen instructions to complete the ins...

Страница 118: ...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 6 3 1 2 Auxiliary Parameters After pressing the wrench icon yo...

Страница 119: ...ment The labels and parameters are completed by default for traces 1 thorugh 5 The auxiliary trace defined on the auxiliary tab for trace 6 has the label Temp to indicate that the OCXO current from th...

Страница 120: ...RSR GNSS Transcoder User Manual 110 2017 Jackson Labs Technologies Inc Figure 6 3 Auxiliary Parameters window Figure 6 4 Traces Parameters window...

Страница 121: ...u can hover over the buttons to see the exact command that is sent Figure 6 5 Sending manual commands 6 3 3 Using the Mouse in the Graph Window Refer to Figure 6 6 for the following description The de...

Страница 122: ...oint 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...

Страница 123: ...of the entire logfile contents Use the checkbox Export all graph data to make this choice You may select a size of the exported images in X and Y The file format may be BMP JPG GIF or PNG Your setting...

Страница 124: ...coder unit over a period of more than 200 hours The red trace is EFC crystal frequency control voltage The crystal is aging becoming faster in frequency over time This requires the control voltage to...

Страница 125: ...to the OCXO in the evenings heating it up and thus making the unit use lower power during that event In Figure 6 9 which is a zoom of Figure 6 8 we can see the phase offset error of the internal OCXO...

Страница 126: ...RSR GNSS Transcoder User Manual 116 2017 Jackson Labs Technologies Inc...

Страница 127: ...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 ano...

Страница 128: ...t Jackson Labs Technologies Inc products are not intended for use in medical life saving or life sustaining applications 7 1 3 Exclusive Remedies THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER S SOLE A...

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