AntiLog RS232 Data Logging System User Guide
Contents
1. DOC AntiLog UG 2003001_1 2 Page 11 of 20 At this moment in time the options lock is STILL active Press the main green On button to actually release the lock If instead you press the Off button at this point the operation is cancelled and the options lock will remain on If you type a space character RETURN or LINEFEED character then the display is refreshed waiting for the On key once more but no other actions are taken Any other keyboard input will cancel the unlock operation and the options lock will remain on 5 6 Battery Check A battery check will show the current condition of the AntiLog power source The testing is performed against the current power supply input which is either through the external DC socket or via the internal PP3 clip Note that if a PP3 battery is fitted but an external power source is simultaneously applied with a terminal voltage higher than the PP3 voltage then the test results will relate to the external power source not the PP3 battery Typing a B key at the AntiLog main menu to show the battery condition check menu Battery condition check f power goes off during a check then battery needs replacing A check will take approximately 20 seconds to complete lt B gt Start a battery condition check lt Esc gt Type another B key to actually perform a battery check During the check a number of characters are filled into a bar style display as shown below W2. In an extreme case the PP3 clip cable or On button wiring may be defective Check the connections to the clip and to the On button from the main circuit board This may involve undoing the four cross head screws on the base of the unit For an external DC power source Ensure you really are supplying the power you expect with the positive supply being fed to the centre pin in the DC external power feed If the unit has an internal battery fitted and appears to have been working before but has suddenly stopped it may be because the external power is not really present and the unit has run down the internal cell instead Ensure the DC power socket is designed to fit with the 6 5 mm barrel and 2 1 mm inner pin size and not the larger 2 5mm inner pin type The external power source should be regulated and able to supply at least SOMA during start up and about 20mA 5V supply or 10mA 9V supply for normal continuous operation In an extreme case the button wiring may be defective Check the connections to the On button from the main circuit board This may involve undoing the four cross head screws on the base of the unit 8 2 can t see the terminal menu in playback mode Ensure you are using the right RS232 cable For connections to a PC or PDA you should be using an RS232 NULL modem cable not a cable with 1 1 pin connections Check the baud rate of the terminal program matches the playback baud rate last set Try typing the space bar or
3. and Off buttons or even restart from the beginning of the log data at any time by just pressing the On button DOC AntiLog UG 2003001_1 2 Page 4 of 20 Note that in this example once the terminal menu system has been used to configure AntiLog no further contact with a host machine is required Simply use the unit with the On and Off buttons to conduct data logging and playback sessions 2 Important Information 2 1 User Guide Applicability This manual refers to the AntiLog product from Anticyclone Systems Ltd running release V1 2 of the embedded software The release version number can be determined from the playback terminal menu system described in section 5 of this document 2 2 Recorder Baud Rate Always select the correct RS232 baud rate for data recording Any data collected using AntiLog where there is a difference between the recording baud rate and the real source baud rate will result in severely corrupted or lost data In common with any other RS232 data recording system it is not normally possible to recover any information from data recorded at the wrong baud rate 2 3 Battery Life If you are running from an internal battery always use a new one when recording important trials data To maintain the life of the battery it is recommended that it is disconnected completely from the system if AntiLog is not to be used for more than a week or so This is because AntiLog supports active power management which means th
4. E Een aaa a od 12 oT Bau rato selot iON Saa na it 12 9 8 X Modem paypak uenn tio 6 Connector WINN Aeee a E E a E E a a S 15 CRS 232 ConmectiOns au e E N ii RERS 15 62 DESPIWE E ia A AREA 15 fs HEED Taste cto aaa 16 Ll Recording EMOS ai a 16 12 Playpack Modest dra 16 71 3 Playback Errol oeie ini a E e e bodas 16 8 Problem OA o a a ao 17 8 1 AntiLog will Mot SWItCN ONL eect a A N A ANS 17 8 2 can t see the terminal menu in playback MOde oooconoccccnnnnccccccononccnnonnnccnnnnnnnnnn nono nnnnnnnnn cnn nnannnncnnnnnns 17 8 3 The data logged appears CorrUpted oocooooocccnnncccnnccnoooonccnnnnccnnnnnnnnnnnnonnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnrinnnnnes 18 8 4 get three flashing red LEDs in recording mode oooooccccinnocccccononcncconnnnnononann cnn conan cnn cnn rca nr n nr rca 18 8 5 Why is my X Modem uploaded file too big oooconnoccccnnnocccccnnoccccccnnnnancconnnanoncnanon cnn onanr cnn nrnnn nn nana 18 8 6 My PC says it wants to install new drivers when boot UP oooocccnoccccnococcccccnananccconnnaccnonannn can nnnanonannnnnnr 18 8 7 The unit won t respond to either the On or OFF DUttON oooooonnccccccccnnnccccccnnoooonccnonnncnonnnnnnnnnnnnonnnnnnnnns 18 9 ADD MIA OASIS O cos da 19 10 Equipment Specification e EEEE Ea Ee 20 10 4 Absolute maximum para MEES a a r tried 20 10 2 Notmal Operatoria a E EE 20 DOC AntiLog UG 2003001_1 2 Page 3 of 20 1 Introduction AntiLog is a very effective way
5. return character in your terminal program to initiate a refresh of the playback menu currently active Ensure you are seeing a single flashing green LED from AntiLog If there is more than one green flash then AntiLog thinks it is transmitting data so press the Off button and check again To restore AntiLog to a known playback baud rate switch off AntiLog by holding down the Off button Now press and hold the On button for at least five seconds or count five flashes of the green LED This will force AntiLog to reset the playback baud rate to a known 115200 speed Configure your terminal to this speed and try again DOC AntiLog UG 2003001_1 2 Page 17 of 20 8 3 The data logged appears corrupted The record baud rate must match the source baud rate Double check on both rates The cable used for recording or playback may be defective e g The ground wire may be disconnected giving the illusion of working properly some of the time Cable length excessive at high baud rates e g 230400 Use only short length cables for recording 230400 baud source data 8 4 get three flashing red LEDs in recording mode The flash media card cannot be detected or it may be defective In an extreme situation i e If the unit gets dropped the flash memory card may have become unseated from its holder Undo the four main screws on the underside of the unit and carefully lift the lid to one side Undo the single screw securing the PCB to the base of
6. then the external power source MUST have a higher voltage than the terminal voltage of the battery fitted otherwise the external DC power source will be ignored and instead power will be taken from the internal battery For this reason it is recommended that the external DC voltage should be 10V to 18V if an internal PP3 is already fitted The external DC power source will NEVER attempt to charge any internally fitted cell If you do fit a PP3 rechargeable cell into AntiLog then this must be removed from the unit and recharged separately when required The centre pin of the external DC power connector must be positive with respect to the outer barrel to supply power to AntiLog It is not possible to damage AntiLog by applying power with the wrong polarity however if an internal PP3 battery is fitted the power will be taken from this instead of the external source and hence the system may give the impression of being powered externally but will stop working when the internal battery runs out 3 3 Data Recording For recording data AntiLog is designed to look like a PC COM port so that equipment designed to plug into the serial port of a PC will plug straight into AntiLog without any need for additional cabling 1 1 RS232 cable If the cable connecting the equipment to AntiLog is incorrect or the baud rate specified within AntiLog does not exactly match that of the source data then successful recording will not be possible 3 4 Dat
7. to log RS232 data from a vast range of y products including GPS navigation receivers laboratory equipment process control systems and serial output from PC programs It can e O operate stand alone with its own PP3 battery or it can be fed with an ae external DC power source for extended operation The design goal was to establish an incredibly simple to operate data logging system that only requires two panel mounted buttons On and Off Even though AntiLog is simple to operate there is no compromise on its capabilities The embedded microcontroller in the product is able to perform full speed real time capture of RS232 data without any hold off e g Flow control which could for example upset the timing of equipment under investigation The system is configured for operation using a standard RS232 terminal All user settings are stored in non volatile memory Flat batteries or battery changes have no effect on the settings or on any previously stored data as this is written to non volatile flash memory media The standard AntiLog product has the following features Fully unattended operation possible including automatic power and logging shut down Ideal for recording GPS NMEA data in the field 32 MByte non volatile storage 64 128 and 256MB options Programmable receiver baud rates from 110 up to 230400 Guaranteed full rate 115200 baud data capture Selectable RTS CTS handshaking for playback Real tim
8. Anticyclone Systems gt AntiLog RS232 Data Logging System User Guide DOC ANTILOG UG 2003001_1 2 19 May 2003 G Hatto c Anticyclone Systems Limited Mr Geoff Hatto c Anticyclone Systems Ltd 2003 www anticyclone co uk DOC AntiLog UG 2003001_1 2 Page 2 of 20 Table of Contents Ts INTO dU CUM se amet aeds a choral a e E ate 4 2 Important INTOCM ALON Ss so 5 2 1 User Guide Applicability cccccccceecccceeeeeeeeeeeaeeeeeeeeeeteceeaaaaeeeeeeeeeeeececcaeeeeeeeeeeeeseceeaaeeeeeeeeeeeeeeeeaees 5 2 2 Recorder Baud Rate soii olaaa cdeltgientadens tet hos 5 2737 Baten Lite oa sde 5 3 Getting Started A ath a el Se cree ho Rasen ley i hhc tln alos me necator ad 5 3 1 Fitting an internal battery ccteae aeaaeae a 5 3 2 Supplying extemal power 21 cicceh keen di adele dines bbc 6 3 9 Data RECOrdinG s ais ici Sea a aie ee ea eee 6 3 4 Data Playback eden ee ee 6 4 BASIC OPGralOM is sce sissies itencns eased eas a ees 7 4 1 Recording Mode cicle 7 4 2 Playback MOda ine eR ed ei einai ade ie ie eed anita lien 7 4 3 Playback Baud Rate Reset Iaeiei hed ne ecceales sete sd 8 4 4 Erasing stored dai A TELL eerie ee eee 8 9 Playback M nu S VSO ioc peria eaedene ace it 8 SMAN Mena tara 9 5 2 Recording Options miii addecniedelanshe da bshoed lili rodada inh debts 9 5 93 Playback Options tati tddi 10 5 4 General OPIO St a AA E A adaasl Both AEA 10 5 5 Locking user options as a a A Ge CRR 11 SE Batlery
9. a Playback When playing back data the connection appears as though it is coming from a PC To connect AntiLog to a real PC therefore requires a NULL modem cable A NULL modem cable crosses over the transmit and receive lines as well as handshake lines to achieve successful communications RS232 NULL modem cable DOC AntiLog UG 2003001_1 2 Page 6 of 20 If the cable is not correct or the host machine e g a PC is not configured to a baud rate exactly matching the AntiLog playback baud rate then no successful communication will be possible 4 Basic Operation There are two push buttons and a single bi coloured high intensity LED mounted on the front panel of the case The green push button labelled On is fundamentally used to switch the unit on and the red push button labelled Off is used to switch the unit off However the buttons are sensitive to the amount of time they are held down to allow the unit to operate in different ways The buttons can also be used when AntiLog is already powered on to perform other functions e g the On button can be used to start the playback of recorded data and the Off button can stop any data playback 4 1 Recording mode If you press the On button momentarily i e hold it for less than one second when the unit is powered down then the unit will power up and enter the recording mode The bi coloured LED will light red for a second or so and then proceed to flash red to show the un
10. age of the fitted PP3 otherwise power will be taken from the battery in preference to the external source Power supplied through the DC socket cannot charge the internal cell If a rechargeable PP3 battery is used then this must be taken out of the AntiLog case and charged separately DOC AntiLog UG 2003001_1 2 Page 15 of 20 7 LED flash codes 7 1 Recording Errors A time gap immediately followed by a flashing red LED indicates AntiLog is in record mode If a red LED flash is immediately followed by a green LED flash then this indicates that data is being read in from the RS232 port and is being written to the internal flash media store If no green LED flash follows the single red LED flash then the system is not seeing new data If more than one red LED flash is seen and no green flashes are seen this indicates an error The total number of flashes following each time gap indicates an error condition as follows Total Number of red LED Error Condition flashes during recording mode 2 Flash media store is full 3 Flash media store not present not detected 7 2 Playback Modes A gap immediately followed by a flashing green LED indicates AntiLog is in playback mode Total Number of green LED Error Condition flashes during playback mode 1 Playback mode terminal menu system active 2 Playing back data in RAW playback mode 3 Playing back data in real time NMEA playback mode 4 X Mod
11. at there is a very small current drain on the battery when AntiLog is switched off Over extended periods of time this standby current will effect the total charge remaining in a given battery Use the battery check feature at the main playback terminal menu to ensure the battery is in good condition 3 Getting Started All that is required to get AntiLog working is a power source and an RS232 data cable connection The power source can be a PP3 battery fitted internally or an external source plugged into the external DC power connector 3 1 Fitting an internal battery To fit the battery remove the battery compartment cover on the back of the AntiLog enclosure by pressing down on the marked area and sliding the cover back Fit a PP3 style battery to the PP3 flying lead clip inside observing the polarity of the connector Note that it is not possible to damage AntiLog by making a connection with the wrong polarity the unit will simply not power up when requested Replace the battery cover DOC AntiLog UG 2003001_1 2 Page 5 of 20 3 2 Supplying external power A 6 5mm DC power jack 2 1 mm inner pin size can be used to supply DC power to AntiLog AntiLog accepts regulated DC power in the range 4 5 to 18V which means for example that the unit can be fed directly from a 12V car battery source for vehicle trials Note that AntiLog gets 1ts power either from an internal battery or from the external source If an internal battery is fitted
12. e NMEA recorded data playback to simulate a GPS receiver output X Modem aware for uploading recorded data to a host machine At least 36 hours of recording time from a single PP3 Alkaline battery Extended operation possible with long life PP3 Alkaline cells Can operate from an external DC power source in the range 4 5 to 18V Small boxed profile 90mm x 60mm x 25mm Also available as an OEM product to embed in your own applications AntiLog only needs the two operator buttons on the front panel for successful recording and playback of RS232 data However the key to AntiLog s advanced capabilities lies in the ability to configure the system before trials or other recording sessions take place The default settings shipped with Antilog will almost certainly need changing to suit your recording needs For example you can use AntiLog to test GPS navigation receiver application software on a PC in a repeatable way To do this you would configure AntiLog for NMEA real time playback and configure the record and playback baud rates to be the same as the GPS receiver being used via the AntiLog terminal menu system You would then record the NMEA output from the receiver for a representative period of time and switch the unit off Next connect AntiLog to the PC using a NULL modem cable and press and hold the On button so that the unit powers up in playback mode to start the testing You can then stop and restart the data stream as you wish using the On
13. e is a simple way to return the rate back to the factory default of 115200 With AntiLog switched off press and hold the On button for at least five seconds This will force the playback baud rate to be set to the factory default of 115200 and the unit will enter playback mode with a flashing green LED The terminal menu system will appear on a terminal set with a baud rate of 115200 No other settings are modified during this process 4 4 Erasing stored data Normally you may erase all stored data in AntiLog via the terminal menu system However it is possible to erase all stored flash data during a playback power on sequence To do this ensure the unit is off then hold down the Off button and whilst holding 1t down press and hold the On button for at least a second The bi coloured LED should light green showing you that playback mode has been established Now release the On button followed by the Off button If you have a terminal connected to AntiLog a message appears informing you that the media has been erased If you do not hold the On button down for long enough the system will not power up and no data will be erased This is done to prevent accidental media erasure which could be caused by accidentally pressing both buttons simultaneously for a short period of time with the power off You may not want this two button erase sequence to be available to operators in the field for critical trials work so it is possible to disabl
14. e this facility using the terminal menu system In this case the only way data can be erased from the system is via the terminal menu system 5 Playback Menu System In playback mode text menus will appear on an RS232 terminal connected to AntiLog Keys are typed into this terminal to select different menu options Keyboard options available are enclosed in either angled lt gt or square brackets If an option is shown in angle brackets it means that a further menu or other prompt or action will follow this menu item selection else square bracketed items show that an item is selectable directly on the page DOC AntiLog UG 2003001_1 2 Page 8 of 20 5 1 Main Menu The main menu automatically appears on a connected RS232 terminal when you power the system up in playback mode for the first time AntiLog V1 2 Serial number ASL 16 nnn 3148395 byte s recorded 9 of 31860744 PLAYBACK mode X MODEM and On button aware w Start playback now or use On button Recording options Playback options General options Lock user options Battery check About AntiLog Shut down QUV VYVV W E vV v AAAAAAAA GP VV The first line shows the product name embedded software revision number and a unique product serial number The second line shows how many bytes characters are currently recorded to the on board flash media store how full the store currently is as a percentage and the total capacity
15. ed The star character shown which baud rate is currently active Note that for playback baud rate selection there is an additional option to allow immediate playback of stored data and the menu is On button and X Modem aware If you have set a playback baud rate which you cannot remember you may not be able to view the terminal menu system again until you select the correct terminal baud rate on the host machine Use the playback baud rate reset power up sequence to restore the playback baud rate to a known value if you do not know the current setting 5 8 X Modem playback As soon as AntiLog is switched on in playback mode it is able to respond to a host request for logged data using the X Modem file transfer protocol X Modem transfers can be initiated by a connected terminal program whilst AntiLog displays a menu which states it is X MODEM aware DOC AntiLog UG 2003001_1 2 Page 13 of 20 Most terminal software hosted on PCs and PDAs can support data transfers using the X Modem or X Modem 1k protocol Hyperterminal supplied as standard with the Microsoft Windows operating system for example supports X Modem file transfers If AntiLog is connected to the host machine via an appropriate cable e g a NULL modem cable and it is showing a menu which states it is X MODEM aware then there is no need to perform any other action other than to ensure the AntiLog playback baud rate matches the baud rate of the software intending to per
16. em data transfer in progress 7 3 Playback Error If one or more of the LED flashes immediately following the first green flash is red then an error condition has been detected The following table shows the errors detected in terms of the total number of red flashes seen following the playback green flash Total Number of red LED Error Condition flashes during playback mode 2 Flash media store not present not detected DOC AntiLog UG 2003001_1 2 Page 16 of 20 8 Problem Solving 8 1 AntiLog will not switch on AntiLog is switched on by pressing the On button either briefly recording mode or for just over a second playback mode You should then see a solid red or green long flash from the bi coloured LED If pressing the On button appears to have no effect then work through these check lists For internal battery operation Remove the battery cover and ensure the battery connection is correctly made Important do this actively by disconnecting the battery using the PP3 clip and reconnecting it Try switching on again Either replace the battery immediately with another cell or check the voltage of the battery with a meter For a PP3 battery this should be at least 8V or more Even though the battery may register sensible looking results off load attempt to switch the unit on whilst monitoring the battery voltage You may find the voltage drops to 3V or less under load replace the battery
17. form the X Modem transfer When you request a file transfer at the terminal using X Modem or X Modem 1k transfer the terminal software normally requires the user to specify a destination path and file name for the log data received This is because the X Modem file transfer protocol does not include a file name specification Once a path and file name have been entered the host will negotiate with AntiLog and a file transfer will commence The host software may give a real time indication of progress and AntiLog will repeatedly flash four green LED flashes in a row followed by a time gap to show it is in X Modem playback mode When the transfer has completed the green LED will go back to flashing once followed by a time gap DOC AntiLog UG 2003001_1 2 Page 14 of 20 6 Connector Wiring 6 1 RS232 Connections Pin RS232 Function AntiLog connection Direction 1 Carrrier Detect No connected 2 Receive Data Receive Data in 3 Transmit Data Transmit Data out 4 Data Terminal Ready Data Terminal Ready out 5 Signal Ground Signal Ground 6 Data Set Ready Data Set Ready in 7 Request To Send Request To Send out 8 Clear To Send Clear To Send in 9 Ring Indicator Not connected 6 2 DC Power External DC power can be supplied via the 6 5 2 1mm power jack Note that the power jack does not disable the internal PP3 cell so the voltage supplied must exceed the battery terminal volt
18. hen all of the characters have been drawn which will take no more than about 20 seconds the test results are shown Performing battery condition check dd Test Results t Battery voltage min load 9 0V Battery voltage max load 8 9V ADVISE More than 24 hours remaining xxx Testing complete If the bar display appears to lock up i e The display is not completed within about 20 seconds then the check detected that the supply had fallen below an internal cut off voltage limit and the unit has automatically shut down This action indicates the the source battery needs replacing immediately 5 7 Baud rate selections The following menu is used to select the record baud rate Set RS232 serial port BAUD rate for recording 0 230400 1 115200 2 76800 3 57600 4 38400 DOC AntiLog UG 2003001_1 2 Page 12 of 20 e N W N oo oo f A en o IE Q NELSON A H gt 00 Oo o This menu us used to set playback baud rate Set RS232 serial port BAUD rate for playback X MODEM and On button aware 230400 115200 76800 5760 3840 2880 1920 1440 9600 4800 2400 1200 600 300 110 lt S gt Start playback now or use On button lt ESC gt 9 ooooo LE H3H00 _05004a0NRao These two baud rate selection menus appear when a change of baud rate is request
19. it is in recording mode The unit can now record any data seen on the 9 way D connector You will know if data is being received and recorded because the panel LED will flashes once in red and then flash once in green followed by a pause to show data is present If no input data is present only a single red flash is seen Pressing or holding down the On button during record mode has no further effect so pressing it accidentally cannot upset your data recording session To terminate a logging session the off button is used However you cannot simply press the Off button to turn the unit off you must hold it down for at least one whole second to terminate the logging and to turn the power off This feature helps to reduce the incidence of data recording loss due to accidental activation of the Off button by knocking it during trials You may repeat the On and Off cycling of the power in record mode as many time as required to add more data to the AntiLog store without the fear of losing data already stored Data is simply appended to the current store 4 2 Playback Mode With AntiLog switched off press and hold the On button until the bi coloured LED shines green At this point you can release the button and the unit is in playback mode The bi coloured LED will now flash green to indicate playback mode If you have a terminal program connected to AntiLog set to the current Antilog playback baud rate then you will see a menu screen on
20. of the installed store in bytes The third line shows that AntiLog is in playback mode it is ready for an X Modem upload if requested and it will start transmitting data from the start of the store as soon as the On button is used The menu options present allow you to enter the recording menu playback menu and a global options menu covering both recording and playback The other items allow you to start playing back data now equivalent to pressing the On button on the front panel lock the user options check the battery status show more about the program or request a system power shut down equivalent to holding the Off button 5 2 Recording Options Recording Options B gt Set record serial BAUD rate L Panel LEDs enabled E gt Erase all recorded data lt lt lt ES The set record serial BAUD rate option will open a baud rate selection menu offering a preset list of baud rates to choose from Use the Panel LED item to toggle the state of the playback LED function Ifa star character appears to the left of the item the LEDs will be active during recording If you want to run for as long as possible from a battery supply then disabling the flashing red recording LED will help to conserve energy to extend battery life DOC AntiLog UG 2003001_1 2 Page 9 of 20 Use the Erase all recorded data item to erase all data currently in the AntiLog flash media store You will be prompted to c
21. onfirm this action 5 3 Playback Options Playback Options X MODEM and On button aware lt B gt Set playback serial BAUD rate P RAW Playback N NMEA real time playback R RS232 Request To Send RTS enabled L Panel LEDs enabled lt S gt Start Playback now or use On button lt Esc gt 9 AntiLog is still able to establish an X Modem connection and play back recorded data by pressing the On button whilst this menu is visible Here you can set the playback baud rate which will be applicable for both the terminal menu system and any data played back via the start playback menu item or On panel button The P and the N items are mutually exclusive in that only one may be active at any time The start character shows which is active RAW playback implies the data is simply sent straight out of AntiLog at maximum speed when the S option or On button is selected NMEA real time playback mode uses a filtered playback in which lines are delayed based on NMEA 0183 format content to give the impression of being output at the nominal 1Hz rate To conserve power or to avoid unwanted visual distraction during a trial you can disable the flashing playback LED from this menu 5 4 General options General Options A Audio enabled E Keypad two button hold ERASE available lt R gt Reset all options to factory defaults lt Esc gt The general options cove
22. play system under Microsoft Windows wants to recognise equipment connected to the serial bus and may send commands to the serial bus to establish what equipment is connected If it does do this and you don t have the options lock active in the playback menu system then it is possible that AntiLog settings could get changed Cancel any requests to install new hardware Insure your AntiLog settings are still correct using a terminal program If you want to boot your PC with AntiLog switched on consider using the options lock 8 7 The unit won t respond to either the On or Off button In an extreme situation it may just be possible to cause the unit to stop responding to the On and Off buttons Remove the battery cover and disconnect the battery for a few seconds and reconnect it again The unit should now work as normal The On or Off switch wiring has become disconnected from the board or the switch Check the button wiring Replace the PP3 battery DOC AntiLog UG 2003001_1 2 Page 18 of 20 9 Abbreviations COM PC serial communications port CTS Clear To Send RS232 GPS Global Positioning System LED Light Emitting Diode OEM Other Equipment Manufacturer PC Personal Computer PDA Personal Data Assistant RTS Request To Send RS232 DOC AntiLog UG 2003001_1 2 Page 19 of 20 10 Equipment Specifications 10 1 Absolute maximum parameters Parameter Min Max External DC Operating voltage 4 3V 20 0V PP3 clip
23. r both playback and record modes The AntiLog hardware is capable of playing back audio samples This facility has been disabled internally in the current release of the embedded software V1 2 and the option is provided here for a later release If you are working on important trials you may want to minimise the chances of losing important recorded data As such you can disable the ability of a user in the field to erase the contents of the flash media by holding down the Off and the On buttons at start up Ifa star character does not appear to the left of the menu item then the only way to erase stored data is via the Recording Options menu using a serial port terminal DOC AntiLog UG 2003001_1 2 Page 10 of 20 5 5 Locking user options The user is able to change the recording playback and general options with simple key presses using the three menu items discussed above However 1f AntiLog is accidentally connected to a live source of RS232 data and the unit is powered on in playback mode instead of the intended recording mode AntiLog will think the incoming characters are user menu input and may attempt to change the AntiLog settings For example if the incoming input stream just happens to have the characters REY at the point when AntiLog is at the root menu then AntiLog will go into the recording options R select Erase all recorded data E and will confirm the deletion Y The user options lock prevents any input in pla
24. supply voltage 4 3V 20 0V RS232 data input voltage levels 25 0V 25 0V 10 2 Normal operation Parameter Min Typical Max Operating duration from internal PP3 cell Test conditions Continuous data 36 Hours 40 Hours 48 Hours logging of NMEA data from GPS receiver at 4800 baud using a Duracell Plus PP3 cell Power consumption 54mW 63mW 92mW Power consumption off standby 91uW External DC Operating voltage 4 5V 12V 18V Operating temperature 0 C 70 C Weight with battery fitted 0 15kg RS232 baud rate 110 230 400 Size W x Lx D 65 x 93 x 30mm Maximum guaranteed sustained g 115200 i full rate data logging speed Media Life Expectancy f 300 000 write Media card specific card operations supplied 1 The RS232 driver chip used in the AntiLog design is only rated for transmit at up to 140 000 baud into a full 3 kOhm 1000pF load Similarly the receiver baud rate may be effected by long cable lengths For this reason it is recommended that the highest baud rate used is 115 200 The upper baud rate of 230 400 is possible with short cable lengths Note that the standard serial port UART fitted to most PCs cannot operate at such a high speed the top baud rate available is fixed at 115 200 DOC AntiLog UG 2003001_1 2 Page 20 of 20
25. the box and carefully lift the whole PCB out On the underside of the card you will see the flash memory card and holder Remove and replace the flash memory card to ensure a positive connection Refit the PCB into the case fit the board retaining screw and replace the lid and four screws ensuring no wires are trapped as you secure the lid 8 5 Why is my X Modem uploaded file too big When you use X Modem to transfer a file from AntiLog to a host machine the transfer is done in 1024 byte blocks as defined in the X Modem specification An uploaded data file therefore should be an integer number of 1024 bytes long but 128 byte packets are also allowed This means that in most cases 1024 byte blocks are transmitted followed by a fixed number of 128 byte blocks to minimise on the number of pad bytes to apply to the end of the file The padding character used is in accordance with the X Modem specification and is ASCII character code 26 Control Z The uploaded file size will therefore be an integer number of 128 bytes long Note that byte padding is not applied to data played back from AntiLog in either RAW or NMEA playback modes 8 6 My PC says it wants to install new drivers when I boot up If you boot your Windows PC with AntiLog switched on in playback mode you may see messages saying your system has found new hardware and wants to install new driver software for example it may say it has found a new bus mouse This is because the plug and
26. the terminal s display With the unit already power up in playback mode you can press the On button again momentarily to start the replay of record data straight from the AntiLog store You can also initiate playback from the terminal menu system Data can be replayed at full rate or using a special NMEA playback mode in which recorded GPS NMEA data is played back in one second blocks to simulate the receiver s original output When playing back data the Off button can be used to stop the output The On button can then be used to restart playback DOC AntiLog UG 2003001_1 2 Page 7 of 20 from the beginning of the recorded data store This process can be repeated as may times as required If the unit is not already playing back data you can initiate an X Modem data transfer from your terminal program to allow data to be transferred from AntiLog to a host machine with checksummed data packets to ensure high data integrity To turn off the unit ensure you are not currently playing back data press the Off button momentarily if you are then press and hold the Off button for at least a second as you do to switch the unit off in record mode 4 3 Playback Baud Rate Reset The default playback baud rate is 115200 The playback baud rate can be set via the terminal menu system to a wide range of rates from 110 to 230400 If you change this rate and forget what it is or you suspect someone else has altered it without your knowledge then ther
27. yback mode from altering any of the AntiLog system settings It does not stop the unit functioning in playback mode it just prevents any alteration to the data and or user settings Type an L key at the root menu and you will see the main menu change as follows AntiLog V1 2 Serial number ASL 16 nnn W 3148395 byte s recorded 9 of 31860744 PLAYBACK mode X MODEM and On button aware lt S gt Start playback now or use On button LOCKED Recording options LOCKED Playback options LOCKED General options lt L gt UnLock user options lt B gt Battery check lt A gt About AntiLog lt U gt Shut down 9 It is now only possible to start data playback which is always a non destructive action attempt to unlock the options lock discussed here later display more about AntiLog read only or to safely shut the system down Attempts to request the Recording Playback and General options menu are ignored To unlock the options lock you need to go through a set sequence With the root menu locked type L and confirm that you want to release the options lock by typing a Y key at the Are you sure prompt The following display shows the screen output to this stage Are you sure lt Y gt Yes lt N gt No lt Esc gt e Unlock User Options Press the On button now to unlock user options Escape key or Off button to cancel the operation lt Esc gt
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