MSR-Audio User Manual
Contents
1. 12 2 3 6 xci 13 2 3 7 LOO e 14 2 3 8 GU RE 15 2 4 Decoding interrupted 16 2 5 qelc 17 5 Te ____ __ ___4_ 18 1 Hardware specification 11 General specification PARAMETER MN MAX UNT VWwIputvotagg 32 55 V wInptcuren Slep 13 30 _ AaMagneticHeadGainTrack1 100 Ac Magnetic Head Gain Track2 100 fos Track 1 Oversampling 180 Track 2 Oversamplins so m _ HaTmkiSampewie 18 amp m IMTakiTak2Reouon 8 bt 19 22 24 X 2 42 1 2 Layout Battery Battery LED Head common GND Switch Head Track 2 Head Track 1 SD Card Figure 1 Top side PCB layout Switch microSD Card Figure 2 Bottom side PCB layout 1 3 SD Card and WFM file The reader stores sampled data on the SD card The SD card must be formatted with a FAT32 file system The recommended SD card size is 268 or 4GB A wfm file is created for each swipe This file is created with a unique id and timestamp The2. gt Local Disk E gt Local Disk F gt e BD ROM Drive G gt 90 Libraries gt Network gt 28 Control Panel Recycle Bin gt Jj documentation Figure 4 Select folder dialog When using this dialog the user browses to a folder not to a file After the application gets a records folder automatically or manually a list of all available files is shown Figure 5 Select records folder C samples C samples MSR00176 WFM C samples MSRO00177 WFM C samples MSRO00178 WFM C samples MSRO00179 WFM C samples MSR00180 WFM C samples MSR00181 WFM C samples MSR00182 WFM C samples MSRO00183 WFM C samples MSR00184 WFM MSR00185 WFM C samples MSRO00186 WFM C samples MSR00187 WFM C samples MSRO00188 WFM C samples MSR00189 WFM C samples MSR00190 WFM Figure 5 A list of WFM files loaded from a folder on the hard drive When an entry in the file list is clicked the application runs the decoding algorithm Decoded data as well as the timestamp duration and ID of the swipe for Track 1 and Track 2 are displayed in their respective text boxes Figure 6 Track 1 data 80123456789 JOHN DOE 987654321 TimeStamp 00 00 05 Swipe durationz327ms 10 00176 Track 2 data B0123456789 TimeStamp 00 00 05 Swipe duration 32 ms 10 00176 Figure 6 Text output If the plotting is enabled in the Options Plot menu Figure 7 selecting a file redraws the data waveform
3. 7 7 7 MA A ES Ji 1122197 gt p y 7 Perbup MSR Audio User Manual Table of Contents 1 Hardware Specill6dl OD 3 1 1 _ _ _______ NM MN NE 3 1 2 c 3 1 3 ERE UU TT 4 1 4 time Selecto __ ___ _ __ 5 1 4 1 AU OMIT ___ ___ __ __ 5 1 5 NON AU OF NN E Em 5 1 5 1 Fast autos ova avian ae NNI MIN NIME D UND EHE UE 5 1 5 2 SOW ac 5 1 5 3 ED E TDI OTT 5 1 5 4 qo gie dig 5 1 5 5 ED IGE ATOM dimne 6 giae RUNDE 7 2 1 7 2 2 Wawe ___________ 10 2 3 _____________ _ 10 2 3 1 Wines dec 10 2 3 2 m 10 2 3 3 CONTENE NU vans a tes Paso de 10 2 3 4 Groom 11 2 3 5 MM
4. DELAY 2 for 1 seconds DELAY 3 for 1 5 seconds The configuration file is read during the SD card initialization Besides defining the delay time the configuration file can be used to set the reader s ID counter to zero RESET COUNTER TO ZERO When the MSR is rebooted with a RESET COUNTER TO ZERO command it restarts the ID count to O after each restart It is possible to set the delay time and reset counter to zero in a single configuration file 1 5 LED indicator The LED indicator signalizes the current state of the MSR The device can be in 2 error states an active read state with signal present on the read head a waiting read state no signal on the read head and a sleep state 1 5 1 Fast blinking Fast blinking LED indicates the first error state This error is caused by failure to initialize the SD card While in this state reader continuously retries to initialize the SD card 1 5 2 Slow blinking Slow blinking LED indicates an error during data write to the SD card This can happen if the SD card is taken out of the reader before ending the swipe Some older SD cards have non deterministic time of access which can result in read buffer overflow 1 5 3 LED indicator off If the LED indicator is off with the power switch turned on the MSR is running in sleep mode Sleep mode is a low current drain mode the reader wakes up if it detects a signal on the read head This type of operation provides large power savings and allows
5. for longer operation of the device 1 5 4 LED indicator bright Constant bright LED light indicates active read state This means that the reader is measuring generated voltage on the read head and is streaming the data to the SD card 1 5 5 LED indicator dimmed Dimmed LED indicates a waiting for signal read state This state happens when there is no generated voltage on the read head but the swipe delay time has not yet passed If a voltage is detected during the delay the reader reverts to active read mode Otherwise it saves the wfm file and goes back to sleep 2 PCapplication 2 1 Getting started The MSR Tron MSR Audio Software Suite allows the user to interpret the data analogue data recorded by the reader Figure 3 shows the main application screen MSR Tron MSR Audio Software Suite x File View Options Tools Track 1 elect records folder Peaks Data Please select a MSR folder PeakDetection 100 m Track 1 data Track 2 Peaks Data PeakDetection 100 E Track 2 data Figure 3 Main application screen after start The application automatically finds drives labelled MSR i e the SD card used for reader operation should be named MSR to use this feature The user can also select a records folder manually using the Select records folder button The dialog is shown in Figure 4 gt Videos gt Local Disk C
6. 5 interrupted swipe eode DE tu bo 16 Peak times visualization enenatis 17
7. 9 23499 23699 23899 24099 24299 24499 Peaks Data Peak Detection Value 87 Index 100 1 49 99 149 199 Figure 11 Crop functionality 2 9 A standard cut functionality implementation User selection is cut from the waveform Figure 12 Track 1 Peaks Data PeakDetection 100 Crop Value 148 Paste E Index 20172 Zoom Cut Insert Silence Decode Interrupted Peaks Data 200 PeakDetection 150 100 100 50 Value 148 Index 20172 0 19455 19655 19855 20055 Figure 12 Cut functionality 2 3 6 Paste Pastes cut data to the location specified by the user selection Figure 13 19455 1965 19855 Figure 13 Paste functionality Peaks Data PeakDetection Cut Insert Silence Decode Interrupted 100 Value 223 Index 19906 Peaks Data Peak Detection 100 Value 223 Index 19906 20055 2 3 7 ZOOM Zooms to area selected by the user Figure 14 HE 8 V PeakDetection M TT 150 WIN um BAM WINE m 1 1999 3999 5999 Bd uu Figure 14 Zoom functionality 2 3 8 Insert Silence Cuts the user selection out and inserts silence instead Figure 15 Track 2 300 9 Peaks Data 250 PeakDetection c a JH Ml NIB 100 Value 1 50 moe 50 es fe 2 4 Decoding interrupted waveforms T
8. Figure 8 Track 1 50 Peaks Data PeakDetection ml 100 Figure 8 Example waveform plot 2 2 Wave file options The application Tools menu provides wave export features Figure 9 Tools Track 1 Track 2 Export to WAV Figure 9 Wave handling menu Track 1 and 2 are recorded separately when converting to wave format This feature is useful for using external tools for editing the signal waveform 2 3 Graph editing features The application provides several wave editing features 2 3 1 Left click drag The user selects an area of the graph by left clicking at the starting position dragging then releasing the left click at the end position 2 3 2 Right click drag The user can move around the graph by using the right click and drag The graph is dragged with the mouse 2 3 3 Right click context menu This menu is brought up by right clicking the appropriate graph without dragging the mouse Figure 10 Crop Cut Paste Zoom Cut Insert Silence Decode Interrupted Figure 10 Right click context menu 2 3 4 Crop A standard crop functionality implementation User selection stays in the waveform while the not selected data is removed Figure 11 Track 1 250 T Peaks Data gt uem 200 PeakDetection 150 100 100 J Paste Value 145 Fm Index 24042 Cut Insert Silence 0 RE E Decode Interrupted 2329
9. file contains both Track 1 and Track 2 data The file also contains a footer area at the end of file where the reader stores the timestamp and the ID of the swipe Filenames are generated by combining the swipe ID with the MSR prefix Successive swipes have successive Ids e g a read with the ID 00000 is stored in MSROOOOO wfm The following swipe has the ID 00001 which generates the MSROOO001 wfm filename Two swipes are stored in independent files if the pause between them was longer than the defined time delay This delay is defined by using the jumpers on the PCB or by using the configuration file on the SD card if a configuration file is stored on the SD card the reader ignores the jumpers i e the SD configuration has a higher priority 4 different delay time options are available O sec 0 5 sec 1 sec 1 5 sec Swipes which happen before the defined delay has passed are stored in a single file and are considered interrupted 1 4 Delay time selection Delay time selection can be done by defining a configuration file on the SD card 1 4 1 Configuration file If a configuration file is present in the root directory of the SD card and if there is a valid delay configuration command defined in the file the reader ignores the jumper configuration and sets the configured delay from the file The configuration file must be named msr conf cfg Valid delay configuration commands are DELAY 0 for 0 seconds DELAY 1 for 0 5 seconds
10. menace taU _ __ _ __ ____ 4 Figure 3 Delay time via JUI Del Si ieu p Eur Pa tu sa Sera hi Saibw dre Error Bookmark not defined Figure 4 side component assembly Error Bookmark not defined Figure 5 Bottom side component assembly Error Bookmark not defined Figure 6 Main application screen after Start cccccccsssccccsssecccceseccceescecesaeeceeseneceeeeeeececseneceseueeteeeecetsenecss 7 8 Figure 8 list of WFM files loaded from folder on the hard 8 Meare 9 Text OUtPU qe 9 Figure 10 Plotting enabled disabled 9 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Example Wave ormi 9 Wave 10 15 9 tbt mut 10 TO FNCU OI 11 CUETHBOUORSIID vaca ________ ___ ___ 12 PAGES Tut 13 ZOOM ___ __________ _ 14 Cut Insert silence functionality 1
11. o decode interrupted waveforms the user must select the interrupted area and pick the Decode Interrupted option Some magnetic stripes do not provide a proper postamble part so the right side of the interrupted signal depends of the card writing process The reader inserts the lt interrupt gt tag in the output string to help visualize the interrupted data Figure 16 Track 2 250 ry n Peaks Data 200 PeakDetection 150 100 4S 50 Value 109 0 2313 725 2813 725 3313726 3813725 4313725 4813 725 Track 1 data B0123456789 JOHN DO lt interupt gt 9876543217 TimeStamp 00 00 18 Swipe duration 184ms 10 00186 Figure 16 Interrupted swipe decoder 2 5 Peak time plot The user can use View Peak Times Plot to visualize the calculated time differences between peaks in the audio signal The decoding algorithm is based on using these values to determine bits between 0 and 1 The graph shown in Figure 17 represents a proper distribution of 1 and O times the higher times are O bits and they are usually around two times longer than the 1 bits If the card wasn t in contact with the read head or wasn t swiped correctly the distribution becomes less defined This tool helps visualize any detection faults Figure 17 Peak times visualization tool Table of figures Heure T ____ __ M FOU EIUS 3 Figure 2 Bottom side CB semis
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