- Microgate
Contents
1. 2 2 2 2 2 12 1 14 TRASFERRING DATA TO RACETIME 2 2 1 0 0 13 MODEM FUNCTION A as 13 1 16 TRANSMISSION FREQUENCY 22 1 20 2 14 1 17 MAINTENANCE AND BATTERY RECHARGING 15 2 APPENDIX eee aaa 16 2 1 TRANSMISSION 2 17 2 2 RADIO MODULE TECHNICAL DATA en Ga Ie esee es e ere rre 18 2 3 SYSTEM ACCURAGC ii dis 19 MICRO GATE EncRadio amp DecRadio User Manual 1 LINKGATE ENCRADIO amp DECRADIO SYSTEM MICRO GATE EncRadio amp DecRadio User Manual 5 1 1 EncRadio SIGNAL TYPE gt 9 3 START TE LAP F STOP 7 NR CHANNEL ON gt 1 10 17 SELECT FRONT VIEW LATERAL VIEW BOTTOM VIEW SIGNAL button SECOND FUNCTION button Selector for redundancy of signal transmitted Long Short On Off switch REPEAT button MODEM button Rotating selector for type of signal transmitted Start Lap Stop transmission selector LOW BATTERY led O Jack connector for battery recharge 1 Cover for access to DIP SWITCH selector for transmission frequency 2200 ATTENTION Starting from 2004 all the shipped DecRadio EncRadio will have this dip switch configuration OFF OFF OFF ON In order to use the new DecRadi2. only transmitting the output speed base impulse the signal corresponding to the GREEN banana jack MICRO GATE EncRadio amp DecRadio User Manual 11 BLACK PLUG IN BLACK SOCKET POLIFEMO _ GREEN PLUG IN GREEN SOCKET a lt a lt ENCRADIO BLACK PLUG IN BLACK SOCKET GREEN PLUG IN GREEN SOCKET DECRADIO POLIFEMO GREEN PLUG IN SOCKET N BLACK PLUG IN BLACK PLUG IN BLACK SOCKET BLACK SOCKET GREEN PLUG IN GREEN SOCKET Figure 1 Figure 1 shows the connections for a speed measurement with the use of 2 Polifemo photocells the first photocell must be connected 2 meter 050 or 20 meter 48 cables to EncRadio s Red and Black banana jacks and the second to the Green and Black banana jacks The rotating selector for selection of the signal on EncRadio must be set to LAP E 1 12 Resetting the memory Resetting the memory causes the deletion of stored data and of the system s internal time You can activate reset by keeping the 2ND key pressed down and then releasing the REPEAT RESET key When this command has been received Linkgate Encoder will emit three tones as follows BOOP BEEP BOOP The system is reset MICRO GATE EncRadio amp DecRadio User Manual 12 1 13 Synchronization and Autosynchronization Linkgate Encoder is equipped with a REAL TIME CLOCK which enables you to relate any event to a time It is
3. 1 11 Taking a speed With Linkgate Encoder you can receive up to 16 pass by speeds from as many different measurement zones The basic idea is to calculate the speed base time extremely accurately and transmit it together with the corresponding impulse START LAP or STOP Then by inserting the length of every single speed base into the Micorgate chronometer you can obtain the value for the average speed for that stretch The input speed base signal must be brought onto the RED banana jack see chap EncRadio 5 and the relative ground onto the BLACK banana jack the output speed base signal must be brought onto the GREEN banana jack together with its ground which must be connected to the BLACK banana jack When an impulse is received from a speed base input from the RED banana jack the LINKGATE Encoder sets the time running If within 8 seconds there is an impulse from the speed base output from the GREEN banana jack the LINKGATE Encoder will transmit the time between the two signals speed base time and the impulse of the speed base output that is the corresponding LAP or STOP impulse In the case of a START signal with the rotating selector on position 0 the impulse of the output signal from the speed base will always be transmitted but the receiving chronometer will reconstruct the correct time If more than 8 seconds pass between an input speed base impulse and an output impulse the system will automatically discard the value
4. this function is that the MODEM function quickly uses up the battery In this way you can avoid the danger of rapidly running down the battery by accidentally touching the MODEM key To terminate the transmission session you need only press the MODEM key once The system will emit the tones BEEP BOOP to signal correct termination procedure MICRO GATE EncRadio DecRadio User Manual 1 16 Transmission frequency variation In some cases it will be necessary to vary the transmission frequency of EncRadio DecRadio for example when two Linkgate systems are used simultaneously Obviously the receiver and transmitter will have the same frequency As can be seen in Figure 2 the DIP SWITCH for frequency selection is four way so 16 different frquencies can be set Figure 2 Frequency set KHz Switch 1 Switch 2 Switch 3 Switch 4 433 900 ON ON ON ON 433 950 OFF ON ON ON 434 000 ON OFF ON ON 434 050 OFF OFF ON ON 434 100 ON ON OFF ON 434 150 OFF ON OFF ON 434 200 ON OFF OFF ON 434 250 OFF OFF OFF ON 434 300 ON ON ON OFF 434 350 OFF ON ON OFF 434 400 ON OFF ON OFF 434 450 OFF OFF ON OFF 434 500 ON ON OFF OFF 434 550 OFF ON OFF OFF 434 600 ON OFF OFF OFF 434 650 OFF OFF OFF OFF MICRO GATE EncRadio amp DecRadio User Manual 15 1 17 Maintenance and battery recharging Linkgate EncRadio and DecRadio have been designed as maintenance free dev
5. therefore possible to synchronize the Linkgate Coder s internal clock with any type of chronometer The procedure for synchronizing the system is as follows Connect the chronometer s ground GND with the Linkgate Encoder s BLACK banana jack Hold down the 2ND key and then press and release the SIGNAL SYNC key Linkgate Encoder will emit the tones BOOP BEEP the system is waiting for a START Connect the start line to the GREEN banana jack Within two minutes give a start signal to synchronize the system either by pressing the SIGNAL key or by closing the start line on the ground e On receiving a START signal Linkgate Encoder will emit two tones tone BEEP BOOP the system is synchronized If you wish to synchronize two or more Encoders with a chronometer the procedure remains the same You must connect all the ground lines BLACK banana jack with the chronometer s ground then for every Linkgate Encoder you must activate the SYNC procedure the second point in the procedure connect the starting line to all the GREEN banana jacks and give a common START As well as the normal synchronization described above EncRadio s internal clock and that of the chronometer can be autosynchronized after transferring any event times memorised by EncRadio see REI2 or RACETIME2 reference manual for autosynchronization It is important to remember that autosynchronization can only take place if EncRadio has not been switched off or synchronized in th
6. LINKGATE EncRadio amp DecRadio User Manual MEE ia Stradivari 4 http www microgate it EncRadio amp DecRadio User Manual MICRO GATE EncRadio amp DecRadio User Manual 3 INDEX 1 LINKGATE ENCRADIO amp DECRADIO SYSTEM 2 00011 4 libb FENCRADIO Sp teers anga 5 DECRA DIO A ART 6 1 INTRODUCTION ds ata 7 1 4 FIELD OF USE AND HOMOLOGIZATION III Ie sse ee ee eee 7 1 5 LINKGATE ENCRADIO 3 SAFETY FEATURES FOR RADIO TRANSMISSION 8 1 5 1 Digital transmission e eme eme e e he e e e e e e eee 8 72522 A 8 1 5 3 Internal memorization of event times eee eee eme ee e ee eee 8 1 6 SSWEECHING ON AS A 9 17 SELECTING 9 1 8 SELECTING THE iia adela 9 1 59 IMPULSE TRANSMISSION is 10 1 10 USING THE REPEAT a e i 10 BAT TARINGA SPEED n E DO AS 10 1 12 RESETTING THE MEMORY NI I Ie endian es 11 1 13 SYNCHRONIZATION AND
7. ally downloaded At the end of data downloading the two tones BEEP BOOP indicate that the procedure has terminated correctly NOTE if you download data immediately after performing a memory RESET 2ND REPEAT RESET and without transmitting any impulses LINKGATE Encoder will download the entire contents of the memory 256 times 256 speeds 1 15 Modem function Linkgate Encoder can also be used as a modem transmitter Contrary to what happens when transmission is generated during an event however input does not take the form of sets of data with error correction codes but is simply transformed into a signal compatible for radio transmission Data reliability is left entirely to the effectiveness of the radio system In this function mode Linkgate Encoder accepts a Serial signal for inputs with a maximum speed of 1200 Baud and generates a FSK modulation between 1200 Hz logic signal 0 and 1800 Hz logic signal 1 The digital input signal level RS 232 RS 485 or TTL is connected to the blue banana jack and the black banana jack see chap EncRadio 5 The MODEM function can be activated by pressing the MODEM key 3 times consecutively and rhythmically At the first two presses you will hear a BEEP tone At the third the tones BOOP BEEP will signal entrance into MODEM function If the key is not pressed with the correct rhythm the system will refuse to enter this mode The reason for this complicated procedure for activating
8. cy 434 MHz Both the transmitter and receiver are fitted with a microprocessor controlled frequency synthesizer The frequency ranges from 433 875 MHz to 434 650 MHz on 32 channels which can be selected with a 5 bit dip switch on the module Specifications common to the TX and RX radio modules Form of communication Monodirectional TX RX Oscillator PLL controlled Frequency From 433 875 MHz to 434 650 MHz Number of channels 32 Frequency step between channels 25 KHz Frequency stability 2 5 KHz 10 to 5 C Frequency reply From 10 Hz to 2 4 KHz Baud Rate From 300 to 4800 bps Operational temperature From 10 to 60 C TX transmitter specifications Transmitter type PLL synthesizer Output power 10mW 0 3 dB to 50 Ohm Start up time 60ms Modulation Narrow band FM Input levels From V to 12V Input signal type Digital Deviation 2 KHz Spurious emissions lt 60 dBm Power on adjacent channel lt 200 nW Power supply From V to 12V Power supply current 30 mA RX receiver specifications Receiver type Double superheterodyne PLL synthesizer Sensitivity 120 dBm 12dB SINAD CCITT filter Selectivity 7 5 KHz to 6dB Demodulation Narrow band FM Distortion lt 5 to 1 KHz Signal Noise ratio 35 dB Output type Digital Open Collector Power supply From 3 6 V to 12V Power sup
9. e time between the taking of the event and data download Keeping in mind the accuracy of the EncRadio oscillator see chap System accuracy p 19 if the data memorised on a chronometer is downloaded it is advisable to use normal synchronization when the time events are taken shortly after the synchronization itself while it is preferable to use autosynchronization in cases where the event times are taken just before data downloading MICRO GATE EncRadio amp DecRadio User Manual 13 1 14 Trasferring data to RACETIME 2 Linkgate Encoder memorises the last 256 events and the last 256 speeds if received on an internal permanent memory and so makes possible retrieval after an interval of time of any impulses lost as a result of radio malfunction or for any other reason To be able to download the contents of the Linkgate Encoder s memory onto the Racetime2 Chronometer it is necessary to use the appropriate cable which should be connected to the 5 pole connector of the LINKGATE Encoder at one end and at the other to the 15 pole connector of Racetime2 Once the correct menu has been selected on Racetime2 s chronometer you can proceed with data downloading by pressing the 2ND key and then by pressing and releasing the MODEM SERIAL key The start of downloading is signalled by the two tones BOOP BEEP then within 2 seconds two counters will appear on Racetime2 s display screen to indicate the number of times and speeds actu
10. ices Under normal operating conditions the rechargable NiMh batteries embedded in the EncRadio guarantee more than 200 transmission impulses When the battery is low then the usual long tone at the end of every transmission is replaced by a three tone sequence BEEP BEEP BEEP In this case the batteries should be recharged as soon as possible During recharging the presence of the external supply is signalled by the battery recharge led situated near the power supply Recharging ends after about 8 hours and is not signalled by the device MICRO GATE EncRadio amp DecRadio User Manual 2 APPENDIX MICRO GATE EncRadio amp DecRadio User Manual 17 2 1 Transmission protocol HEADER Progressive byte N Description Contents 1 Initial Header Code 2 Linkgate Channel 0 127 Dec 3 Signal type 0x00 Start 0 01 0 0 0x0F Stop 4 Transmission start time Time_LL 5 in 1 32768 di sec Time_LH 6 Time_HL 7 8 Internal Code 0 77 9 Internal Code 10 Internal Code 0x31 DATA FRAME Consecutive byte no Description Contents 11 Initial fame code 12 Chronological impulse Time_LL 13 in 1 32768 di sec Time_LH 14 Time_HL 15 Time_HH 16 Speed value in 1 8192 Speed_Low of a second 17 Speed_High MICRO GATE EncRadio amp DecRadio User Manual 18 2 2 Radio module technical data sheet For module data transmission EncRadio and DecRadio use UHF FM narrow band on the free frequen
11. ing it with any type of VHF or UHF transmitter radio makes the LINKGATE system the ideal instrument for training and competitions at every level Linkgate EncRadio and DecRadio represent a further innovation with respect to the well known and highly esteemed Linkgate Encoder and Decoder The evolution of the products has resulted in the embedding of high reliability low power radio modules 433 MHz 10 mW see radio module technical sheet on p 18 for transmission and reception of signals in both the transmitter Linkgate EncRadio and receiver Linkgate DecRadio Exploiting the characteristics of the modules which work on FM on a very narrow band and the intrinsic reliability of Linkgate EncRadio and DecRadio long distance transmission over 2 km can be achieved without the need of external radio transceivers However for applications which are critical from this point of view it is always possible to connect any type of VHF or UHF transmitter In addition the system s extremely low power consumption allows long autonomy of use which together with the possibility of recharging the batteries represents a great plus of the whole system 1 4 Field of use and Homologization The device intended to be used for competitive sports activities as indicated in Art 334 of cod P T point 4 in all sports disciplines e g skiing athletics horse racing mountain bike motor racing etc both at amateur and professional level homologizati
12. o EncRadio with the old one the dip switches must be made equal on all the devices Anyway we suggest you to use the OFF OFF OFF ON configuration MICRO GATE EncRadio amp DecRadio User Manual Y BOTTOM VIEW UPPER VIEW SIGNAL signal banana jack GREEN Earth signal banana jack BLACK SPEED signal banana jack RED 5 pole Nucletron connector for Radio connection and data download BNC for external antenna connection MODEM input banana jack 1 2 DecRadio OORUN 1 BNC for external antenna connection 2 5 pole Nucletron connector for Radio output 3 Cover for access to DIP SWITCH ATTENTION Suggested dip switch configuration OFF OFF OFF ON MICRO GATE EncRadio amp DecRadio User Manual 7 1 3 Introduction The transmission of an impulse via radio is a critical phase in timekeeping The possibility of losing the data transmitted of having very inaccurate timing and the transmission difficulties in some zones has often made timekeepers and trainers sceptical about this type of approach The LINKGATE system represents a radical innovation in the field of radio transmission of impulses for timekeeping Technological evolution has enabled us to go from the old impulse transmission systems to the more modern data transmission concept which can guarantee extreme accuracy the transmission of large quantities of information and greater reliability In addition the compact size of the system and the possibility of us
13. on code 1 DGPGF 4 2 03 3398837FO MICRO GATE EncRadio amp DecRadio User Manual 8 1 5 Linkgate EncRadio 3 safety features for radio transmission To overcome unreliability and the various problems associated with the old system of radio transmission of impulses LINKGATE Encoder offers a number of innovative solutions 1 5 1 Digital transmission of impulses Linkgate EncRadio transmits sets of data no longer a single impulse that contain a vast amount of information particular the following are transmitted e The transmitter s Code which can be selected with the Channel Select switches e The Type of signal transmitted Start Lap number or Finish which can be selected with the Signal Type switch e How long ago the event took place e The running Time of a speed base if present In addition the kit contains numerous control codes and error auto correction codes which prevent a signal from being incorrectly interpreted during reception All the data information control codes is transmitted 16 times in order to reduce the possibility of reception failure Even with very disturbed signal transmission this system ensures maximum reliability and precision 0 4 thousandths of a second in short you only need the complete reception of a single set of data to be able to reconstruct the original time of the event 1 5 2 The Repeat function If there are any problems in data reception radio malfunction in
14. ply current 30 mA MICRO GATE EncRadio amp DecRadio User Manual 19 2 3 System accuracy When time events are downloaded from EncRadio slight inaccuracies the times of time events are possible due to the accuracy of EncRadio s internal oscillator The maximum error possible is equal to 10 PPM parts per million in a temperature range of 20 to 40 C that is 0 8 secondi ogni 24 ore MICRO GATE
15. sed in such a way that only the chronometers Racetime2 and REI2 set to the same channel for reception can recognize the transmission signal as valid When it is turned on every Microgate chronometer displays the currently selected channel both as a number and as an ON OFF configuration of the Linkgate Encoder switches By choosing the same switch configuration on the Encoders that you want to use you can be certain to receive only the signals from your own timing system This type of filter for signals being received is particularly useful as by selecting different channels you can use several systems chronometer Encoder in the same zone and even on the same frequency without any risk of timings interfering with one another 1 8 Selecting the signal type Linkgate Encoder can identify the type of impulse that is being transmitted Start Lap number or Finish The rotary selector marked SIGNAL TYPE see chap EncRadio p 5 has 16 positions from O to F with the following meanings 0 START 1 LAP 1 9 LAP n 9 A LAP n 10 B LAP 11 C m 12 D LAP n 13 E n 14 F STOP The type of signal is chosen by placing the number or letter for the signal you want next to the black dot by the words SIGNAL TYPE Note the letters are written on the edge of the selector MICRO GATE EncRadio amp DecRadio User Manual 10 1 9 Impulse transmission An impulse can be transmitted in two ways 1 with the man
16. terference from a more powerful transmission a cable which comes unplugged etc you can use the REPEAT function Linkgate EncRadio allows you to repeatedly re transmit impulses which have not been received even after a considerable length of time has passed As soon as the transmission of an event begins Linkgate EncRadio starts counting the time from the start By pressing the REPEAT key you transfer the correct time to the chronometer which takes into account the time which has passed up to that moment 1 5 3 Internal memorization of event times Linkgate Encoder is equipped with a Real Time Clock that allows you to use event times in event management This special characteristic allows you to save the times of every event on a permanent memory then enabling you to download its contents through serial link onto Microgate s chronometers The device memorises the last 256 event times and speeds and therefore allows you to retrieve any data lost because of radio malfunction or any other reason MICRO GATE EncRadio amp DecRadio User Manual 9 1 6 Switching on To switch the system on off EncRadio has an ON OFF selector see chap EncRadio p 5 Switching off and switching on again reset the system and cancel the memory 1 7 Selecting the channel Every Linkgate Encoder is equipped with a 7 switch panel CHANNEL SELECT switch from 2 to 8 see chap EncRadio 5 for setting the transmission channel The transmission channel is u
17. ual activation key 2 by means of any signal given by the closing of a contact normally open produced by a gate or photocell using the BLACK banana jack as a ground and the GREEN banana jack as the signal At the end of data transmission the Linkgate Encoder will emit a BEEP which signals that the device has functioned correctly By using switch 1 next to the words SHORT IMPULSE LONG you can set transmission duration approximately 2 3 seconds for long transmission and 0 6 seconds for short By choosing long transmission you will obtain the greatest redundancy of information as the data will be transmitted 16 times If you select short transmission the set of data will only be transmitted 4 times so you will have lower redundancy but with a substantial reduction of transmission time For normal use we advise you to use long transmission switch 1 OFF in order to maximize the redundancy of transmitted data However for special applications such as the taking of several intermediate times very close together using short transmission is the only practical solution if transmissions are not to overlap 1 10 Using the Repeat function If for some reason data was not received by the Microgate chronometers you can retransmit to them by pressing the REPEAT key even after a considerable interval of time If the problem should continue the event data can be re transmitted as many times as necessary until satisfactory reception has been obtained
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