Manual - Quartzlock
Contents
1. Links SP1 Leave open circuit Used to upload new firmware to the CW25 GPS module SP2 Leave open circuit for 3 3V antenna power Link default for 5V antenna power SP3 Link only when external clock version of the CW25 is used SP4 Leave open circuit when U5 enhanced voltage reference is used Link when US is not fitted to board JP1 amp JP3 fit both jumpers with shorting links for normal operation Links must be removed when programming U3 from the Microchip ICD 2 programmer U3 should be powered from the programmer when programming This is necessary as U3 cannot be programmed with 3 3V Vdd U5 May be omitted when TCXO reference is used U16 MUST be omitted when internal clock version of the CW25 is used It must be fitted when the external clock version of the CW25 is used EBSeriesASManwal 7May2010 Sige 10 OF 12 Appendix B RS232 control codes Model E8 Series Operation Manual all values following command or returned from the microcontroller are hexadecimal backed up in EEPROM UA User adjust UA Returns user parameters aa bbbb aa is bandwidth control bits set ba 1 2 bandwidth 0 to 7 ss bbbb is clock registers 3 and 4 elapsed time UABaa Write new bandwidth control byte OS Overall Status OS Returns overall status bytes aa bb cccc aa is test status byte Bits set bm 1 2 bits 0 to 2 DAC output select bit3 no integrator update bit4 no proportional term bit5 Inhibit holdover mode bit2. aaaa Last phase result 2s complement bbbb Last mod I mod Q ccce 2 5V reference filtered dddd mod phase result filtered Isb 3 05ps eeee mod freq offset filtered Isb 2 33E 14 PD Write PD to command repeat stack EU EEPROM Update backed up values SR Software Reset ER EEPROM read ERCaabb Returns bb bytes from starting address aa as ASCII characters ERNaabb Returns bb bytes from starting address aa as hexadecimal numbers character pairs EW EEPROM write EWCaabbccccc Writes bb characters to starting address aa Correct number of characters must be included in string EWNaabbcccc c Writes bb bytes to starting address aa Character pairs cc etc are interpreted as hexadecimal numbers RI Repeat Interval RI Returns command repeat interval aa aa 8 bit command repeat interval multiplier Range 1 to 255 Command repeat interval is 50ms x aa Raa Write new command repeat interval RID Cancel command repeat and clear command repeat stack E8 Seies A5 Manual 7May2010 Sige 12 Of 12
3. Quartzlock GPS and the computer This solution normally works on Windows 2000 XP and Vista computers E8 Series A5 Manual 7May2010 Sige Ff 1D Quartzlock Model E8 Series Operation Manual Specifications OUTPUTS Sine wave 1OMHz 12dBm 2dBm into 50ohms Harmonics lt 50dBc Spurii lt 75dBc TTL 3 3VCMOS I pulse per second POWER SUPPLY 6 to 15V DC 250mA 500mA DPLL tracking bandwidths 5mHz to 500mHz typical in 8 binary increments Default 20mHz LOCK INDICATOR On not locked Off locked low phase error Short flash every second locked high phase error GPS INDICATOR Green indicates no of satellites used in time solution Amber indicates no of satellites tracked but not used in time solution INTERFACE Shared between DPLL and GPS receiver DPLL 9 6kbaud RS232 PC compatible 8bits no parity no handshake GPS 9 6kbaud Motorola binary format INTERFACE CODES See Appendix B TIME DOMAIN STABILITY LOMHz output Tau Allen variance E8 X Is lt 2x10 10s la IO 100s lt 5x10 1000s lt 1x10 gt 10000s lt 5x10 JITTER 1PPS output Typical lt 5ns RMS E8 Seies Ai Manual Mem Sige F 1D Phase Noise 1Hz 10Hz 100Hz 1 kHz 10 kHz WARMUP E8 X 60dBc 90dBc 115dBc 130dBc 140dBc lt 15 minutes to specified accuracy E8 Series A5 Manual 17 May 2010 Model E8 Series Operation Manual Page 9 of 12 Quartzlock Model E8 Series Operation Manual Appendix A Board set up
4. for the T RAIM algorithm 300ns See the CW12 user manual for further details Gf0003 Request channel T RAIM status message sent every second Hn01 If required the position status data message may be turned on Ha01 If required the visible satellites message may be switched on Bb01 The GPS receiver stores the current status in non volatile memory when switched off EBSeriesASManwal 7May2010 Sige OF 1D Quartzlock Model E8 Series Operation Manual Microcontroller Interface The microcontroller interface allows setup and debug of the digital phase lock loop which locks the 20MHz reference oscillator to the GPS receiver The list of control codes is given in an appendix The only user adjustable parameter is the PLL bandwidth which is accessed with command UA The band width has been factory set to optimum for the E8 X TCXO and the E8 Y OCXO It is only recommended that the user adjusts these values if he is able to measure Allen variance of the 10MHz output at averaging times between 1 and 1000 seconds UA will return the current bandwidth 0 to 7 with 0 the narrowest bandwidth The second parameter hex is the elapsed running time in units of 2 33 hours GPS and Windows Serial Mouse Issue Problem It is possible for windows to incorrectly interpret the data output from the Quartzlock GPS interface as the output of a Microsoft Serial BallPoint Mouse When that happens Windows loads drivers
5. 6 NU bit7 inhibit state control Bits 2 1 0 000 no test output fine tune DAC used for tuning 001 sub sampled I 010 sub sampled Q O11 PLL Integrator upper 16 bits 100 Phase result 101 I sample filtered 110 Q sample filtered 111 references CH6 filtered bb is lock status byte Bits set but to 2 State control states 0 to 7 bit3 set to normalise tuning DACs cleared automatically bit4 NU bit5 Loop locked bit6 narrow range phase detector in use bit7 set to inhibit auto load of PLL gain parameters ccce is PLL control Bits set bitO 1 2 3 bit4 5 6 7 bit8 9 10 11 subsample rate exp filter order integrator gain bit12 13 14 15 proportional gain OSTaa Write new test status byte OSLbb Write new lock status byte OSGcccc Write new PLL control E8 Series A5 Manual 17 May 2010 Page 11 of 12 Quartzlock Model E8 Series Operation Manual PL Phase lock loop PL Returns current status of PLL aaaa bbbb cccccccc dddd eeee aaaa last value of I sample filtered 2s complement 16 bit bbbb last value of Q sample filtered 2s complement 16 bit cccccccc last value of PLL integrator 32 bit integer dddd Coarse tune DAC 16 bit integer eeee Fine tune DAC 16 bit integer PLIccccccce Write new PLL integrator PLCdddd Write new coarse tune DAC PLFeeee Write new fine tune DAC PL Enter command PL into repeat stack PD Phase detector PD Returns phase detector parameters aaaa bbbb cccc dddd eeee
6. Connect the unit to the PC and start the program It may be necessary to set the port and baud rate 9600 The receiver is preset to output 3 sentences on a continuous basis These are Ha position status data Hn 12 channel TRAIM status message and Bb Visible satellites The various windows available from the program should show current satellite data etc It is important to note that some parameters shown by the program will not correctly indicate the actual state of the receiver This is because the program does not automatically update its information when started In particular the TRAIM algorithm will be shown as off when in fact it is by default on in the receiver For the receiver to operate correctly the site survey must be enabled and the TRAIM must be on If this is not the case the receiver will track satellites and compute a fix but the red lock LED will not go out showing the 1OMHz output is in the standby state If the receiver gets stuck in a state where it does not lock the user may inadvertently disabled the TRAIM or the site survey To get back to a known state the following should be performed The messages can be sent using the message window in the WinOncore software Return to factory default state Cf Enable Position Auto survey consult the CW12 user manual for further details Gd03 Enable T RAIM algorithm consult the CW12 user manual for further details Ge01 Set the alarm threshold
7. GPS Timing amp Frequency Standard Quartzlock UK Ltd Gothic Plymouth Road Totnes Devon TQ9 5LH England Tel 44 0 1803 862062 Fax 44 0 1803 867962 Web www quartzlock com E mail quartzlock quartzlock com E8 Series A5 Manual 17 May 2010 Model E8 Series Operation Manual MODEL E8 SERIES USER S HANDBOOK Page 1 of 12 Quartzlock Model E8 Series Operation Manual Contents SEET EAR CHE rer ee 3 Voltage Frequency and Power Characteristics Au 4 ER VIFONME Een ll EE 4 Replaceable Fusing Characteristics een 4 Cleaning Instructions E 4 E8 Series GPS Timing amp Frequency Reference AEN 5 WRU CANT cence nnn R RRE RER R R E R 5 WS POM E 5 e EE 5 Interface and programming DE 6 ETS EE 6 Microcontroller a Eu 7 GPS and Windows Serial Mouse lseue eee eeeeeeeeeeaeeeeeeeeeeeeeeeeeeeeeeeeeees 7 EIERE a E 8 Appendix Assara ae ences E AEEA gece ec a EAEE EEA EASES EE EEEE 10 ators Ine SS MU EE 10 aleet e a Ae a a EE A E E E E E E E O E 11 RS232 CRM Kee TEEN 11 EBSeriesASManwal 7May2010 Base 2 Of 1D Quartzlock Model E8 Series Operation Manual Safety Considerations General This product and related documentation must be reviewed for familiarisation before operation If the equipment is used in a manner not specified by the manufacturer the protection provided by the instrument may be impaired Before Applying Power Verify that the product is set to match the available line voltage and the correct fu
8. al 20MHz oscillator is greater than a pre programmed threshold This does not indicate that the 1OMHz output is unlocked During normal operation the GPS receiver estimates the accuracy of the timing solution using the TRAIM algorithm Time Receiver Autonomous Integrity Monitoring developed for the Motorola Oncore receiver If the predicted timing error is greater than the programmed limit the receiver will switch into standby and the red lock LED will turn on The 10MHz output and Ipps output will then drift according to the ambient temperature and aging of the internal oscillator The unit should never go into standby during normal operation The most likely reason for doing so is a major antenna fault EBSeriesASManwal 7May2010 Base 5 Of 12 Quartzlock Model E8 Series Operation Manual Interface and programming The unit has one RS232 compatible interface This is shared between the GPS receiver and the microcontroller that locks the 1OMHz output to the GPS signal On Initial switch on the interface is connected to the microcontroller If no valid interface code is received within 30 seconds the interface switches over to the GPS receiver If a valid interface code is received the interface remains connected to the microcontroller until the next power on reset GPS interface The GPS receiver interface uses Motorola binary format In order to use this a freeware program such as WinOncore should be installed on the user s PC
9. eep the unit free from dust and use care with liquids around the unit Be careful not to spill liquids onto the unit If the unit does get wet turn the power off immediately and let the unit dry completely before turning it on again Clean with a damp with water cloth Never spray cleaner directly onto the unit or let liquid run into any part of it Never use harsh or caustic products to clean the unit ES Series AS Manual 17 May 2010 age 4 of 12 Quartzlock Model E8 Series Operation Manual E8 Series GPS Timing amp Frequency Reference Introduction The GPS clock is shipped ready for operation No adjustments are needed to have a 1OMHz frequency reference and 1 pulse per second time reference within 20 minutes of initial switch on The status of the GPS lock is shown on four LEDs on the front panel For more information as to satellite signal strengths etc a computer with RS232 may be connected to the interface A freeware program such as WinOncore may be used to display information from the GPS receiver Installation The antenna should be installed preferably with a 360 degree view of the sky However the receiver is very sensitive and will give good results with the antenna on a window ledge or even inside a building The satellite signal strengths may be checked after installation using a computer with suitable software connected to the RS232 interface The DC power supply should be connected The unit will operate wi
10. for the Serial BallPoint Mouse This causes the cursor to move erratically about the display clicking right clicking double clicking dragging and dropping display items as it goes On Windows 2000 XP and Vista you may not experience the problem if you wait until after the computer is booted before connecting the Quartzlock GPS to the serial communications port This problem is not specific to Quartzlock GPS Any NMEA Binary output device connected to a Windows computer s serial port is likely to cause this problem Below are several possible solutions to this problem Solution 1 The easiest solution is to disable the Serial BallPoint mouse in the Device Manager Of course this solution assumes that you do not need to use a Serial BallPoint mouse with your computer When the wild mouse problem occurs follow the steps below 1 Unplug the DB9 connector 2 Right click the My Computer icon on your desktop and select Properties to open the Device Manager 3 Go to the hardware tab of the resulting pop up window and click on the Device Manager button 4 Right click on Serial BallPoint Mouse and choose the option to Disable NOT uninstall this device Solution 2 Do not plug the DB9 connector into the computer until the computer is turned on and the operating system is completely booted and running Every time you use the Quartzlock GPS you will need to start the computer and operating system before making the connection between the
11. se is installed Before Cleaning Disconnect the product from operating power before cleaning WARNING Bodily injury or death may result from failure to heed a warning Do not proceed beyond a warning until the indicated conditions are fully understood and met CAUTION Damage to equipment or incorrect measurement data may result from failure to heed a caution Do not proceed beyond a caution until the indicated conditions are fully understood and met This equipment must be earthed An uninterruptible safety earth ground must be maintained from the mains power source to the product s ground circuitry WARNING When measuring power line signals be extremely careful and use a step down isolation transformer whose output is compatible with the input measurement capabilities of this product The product s front and rear panels are typically at earth ground Thus never try to measure AC power line signals without an isolation transformer WARNING Instructions for adjustments when covers are removed and for servicing are for use by service trained personnel only To avoid dangerous electrical shock do not perform such adjustments or servicing unless qualified to do so WARNING Any interruption of the protective grounding conductor inside or outside the instrument or disconnecting of the protective earth terminal will cause a potential shock hazard that could result in personal injury Gro
12. th any voltage between 6 and 15V DC Current consumption for the E8 X is about 250mA max and the E8 Y about 300mA continuous 500mA maximum warm up A universal line power supply is provided Operation The unit is fully programmed to operate without adjustment anywhere in the world The GPS receiver will take about 1 minute to obtain a fix from a cold start with unknown location The receiver then does a site survey for about 15 minutes averaging the positions obtained After the site survey is complete the receiver switches to position hold mode and uses all the satellites available to improve the accuracy of the time calculation At this point the unit will lock its 20MHz reference oscillator to the GPS signal This only takes a few seconds When the PLL locks the red lock LED should go out but may flash for a further minute as the PLL settles The normal operating condition is with the red lock LED off The status of the satellite tracking is shown by the green and amber LEDs The normal situation is that the green LED shows a long flash followed by a number of short flashes The number of short flashes shows the number of satellites being tracked and included in the time solution The amber LED may also flash This shows the number of satellites being tracked but not included in the timing solution If the red lock LED should start to flash at about 1Hz rate this indicates that the phase error between the GPS signal and the intern
13. unding one conductor of a two conductor out let is not sufficient protection Whenever it is likely that the protection has been impaired the instrument must be made inoperative and be secured against any unintended operation If the instrument is to be energised via an autotransformer for voltage reduction makes sure the common terminal is connected to the earthed pole terminal neutral of the power source Instructions for adjustments while the covers are removed and for servicing are for use by service trained personnel only To avoid dangerous electrical shock do not perform such adjustments or servicing unless qualified to do so E8 Series A5 Manual 7May2010 Pae Of 12 Quartzlock Model E8 Series Operation Manual For continued protections against fire replace the line fuse s with fuses of the same current rating and type for example normal blow time delay Do not use repaired fuses of short circuited fuse holders Voltage Frequency and Power Characteristics AC Power Adaptor Voltage 100 240V AC Frequency 40 50Hz Power characteristics 500mA Max Voltage 12V de 300mA 500mA Environmental Conditions Temperature Operating ambient 10 C to 55 C 65 to 65 op Storage 40 C to 85 C Magnetic Field Sensitivity lt 2x10 Gauss Atmospheric Pressure 60m to 4000m lt 1x107 mbar Replaceable Fusing Characteristics N A Cleaning Instructions To ensure long and trouble operation k
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