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R.V.R. Elettronica TRDS4002 Скачать руководство пользователя страница 8

TRDS4002

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User Manual

Rev. 1.0 - 03/08/05

Radiodata is the fruit of work undertaken by a specialized UER group, based on five
proposals formulated by Sweden, The Netherlands, Great Britain, Finland and France.

The superiority of this system results mainly from its protection from transmission
errors, crucial for in-car reception, high speed to synchronize the data groups, from
its high data rate, its potential for new applications and flexibility of use.

The spectrum of a multiplex, stereophonic signal, containing data is shown in fig.1.

Figure 1

The signal is transmitted by amplitude modulating, in suppressed carrier mode, a 57
KHz (3 times the 19 KHz pilot) subcarrier with a deviation of ± 2 KHz of the RF
carrier, retaining a maximum deviation of ± 75 KHz for the multiplex, composite audio/
data signal.

Data transmission speed is 1187.5 bit/s and, being biphase coded, produces a
spectrum of about ± 2 KHz around the 57 KHz frequency which is suppressed-
carrier modulated.

Carrier suppression is required to enable co-existance with ARI signals, since the
latter transmits information using narrow-band (about 250 Hz) DSB amplitude
modulation.

The most important waveforms produced by this modulation are shown in fig.2

below.

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Содержание TRDS4002

Страница 1: ...TRDS4002 User Manual Volume 1 Manufactured by Italy ...

Страница 2: ...005 Revision History Date Version Reason Editor 03 08 05 1 0 First Version J Berti Notification of intended purpose and limitations of product use This product is a FM transmitter intended for FM audio broadcasting It utilises operating frequencies not harmonised in the intended countries of use The user must obtain a license before using the product in intended country of use Ensure respective co...

Страница 3: ...tures RDS 8 4 4 Applications 8 4 5 Definition of terms 9 5 Quick guide for installation and use 13 5 1 Installation 13 5 2 Auxiliary Equipment 13 5 3 Interconnection 14 5 3 RS232 Serial Port 14 5 4 Software 14 6 External Description 39 6 1 Front Panel 39 6 2 Rear Panel 39 7 Technical specifications 40 7 1 RDS Generator 40 7 2 Data Syncrhonization 40 7 3 Remote I O 40 7 4 General Data 40 7 5 Connec...

Страница 4: ...TRDS4002 ii User Manual Rev 1 0 03 08 05 ...

Страница 5: ...ncidental defects 5 Re shipment costs or insurance of the unit or replacement units parts Any damage to the goods must be reported to the carrier in writing on the shipment receipt Any discrepancy or damage discovered subsequent to delivery shall be reported to R V R Elettronica within 5 five days from delivery date To claim your rights under this warranty you shold follow this procedure 1 Contact...

Страница 6: ...ectrical Burns 3 2 1 Extensive burned and broken skin Cover area with clean sheet or cloth Do not break blisters remove tissue remove adhered particles of clothing or apply any salve or ointment Treat victim for shock as required Arrange transportation to a hospital as quickly as possible If arms or legs are affected keep them elevated If medical help will not be available within an hour and the v...

Страница 7: ...he manual tuning of receivers and even make it fully automatic This is of particular benefit with today s large and continuously growing number of FM radio stations It is also possible to receive up to date traffic news and offer other interesting features In the future when radios will be fitted with voice synthesizers it will be possible to transmit traffic news or other information on the addit...

Страница 8: ...aining data is shown in fig 1 Figure 1 The signal is transmitted by amplitude modulating in suppressed carrier mode a 57 KHz 3 times the 19 KHz pilot subcarrier with a deviation of 2 KHz of the RF carrier retaining a maximum deviation of 75 KHz for the multiplex composite audio data signal Data transmission speed is 1187 5 bit s and being biphase coded produces a spectrum of about 2 KHz around the...

Страница 9: ...void phase ambiguity on recovering the 57 KHz subcarrier in the case of coherent demodulation the binary data signal undergoes differential encoding prior to biphase encoding Fig 3 gives an example of the 57 KHz subcarrier after modulation by the data signal ...

Страница 10: ... 42 User Manual Rev 1 0 03 08 05 Figure 3 The system satisfies the protection ratios specified by the CCIR for mono and stereophonic transmissions Figure 4 Protection ratios for FM radiophony max deviation 75 KHz ...

Страница 11: ...mission is completely synchronous and there are no interruptions between consecutive groups and blocks Each block is protected by a self synchronizing compressed cyclical code 26 16 having the following properties detects all single and double errors detects error strings of up to and including 10 bits detects approximately 99 8 of error strings over 10 bits long The code 26 16 performs well in co...

Страница 12: ... RADIOTEXT TA PTY MS Fast tuning and switching information Traffic Message Channel Enhanced Other Network Linkage Information Lenguage Identification Code Extended Country Code Application Identifications Program Type Name 19 KHz Input available on the rear panel Command TA TAEON 0 TA EON 1 TAEON 2 TA EON 3 TAEON 4 MS RDS OFF remote available on the rear panel via Cannon 25 pin connector Enabling ...

Страница 13: ...ation of this information is the ability for the receiver to search automatically for alternative frequencies in the event of bad reception of the program to which it is tuned The change of frequency happens when a better signal with the same code of PI program Identifier is found Program Service name PSN This function allows transmission of messages upto a length of eight alphanumeric characters ...

Страница 14: ...e program in order to identify it This service is not yet available on all receivers but will eventually allow the receiver to be programmed to record certain types of program 31 categories of program have already been defined by the EBU and are listed as follows 0 No program type or undefined 1 News 2 CurrentAffairs 3 Information 4 Sport 5 Education 6 Drama 7 Culture 8 Science 9 Varied 10 Pop mus...

Страница 15: ...receivers will have two controls for independant volume adjustment of music and speech to the listener s preference Program Identification Number PIN This function allows selection of program type by the listener such as light music news or other Radiotext RT This function allows the transmission of 64 characters addressed to domestic receivers equipped with a particular display With in car receiv...

Страница 16: ...tching information Fast tuning service Traffic Message Channel This service is used to send traffic information through a specific channel Enanched Other Network EON This service transmits network information Linkage Information LI This information is transmitted together with the EON Lenguage Identification Code LIC Language used by the radio station Extended Country Code ECC Specify oncemore the...

Страница 17: ...of temperature 3 Check that the line voltage is suitable for the TRDS4002 before connection with the cable supplied The voltage is selected internally and can be 220 VAC or 110 VAC 50 60 Hz 4 Take care to ensure that input and output connections are made properly since in the majority of cases hum and noise are caused by poor connections 5 Never use alcohol or chemical solvents to clean the unit a...

Страница 18: ...1 5 dB with respect to the stereo and consequently 11 5 dB with respect to the pilot No phase adjustment is required as synchronization is performed automatically by internal circuitry In the event of monophonic transmissions the RDS data encoder should be connected between the last low frequency unit in the audio chain and the transmitter 5 3 RS232 Serial Port The Serial connection RS232C is stan...

Страница 19: ... program click on the Start button on the applications bar with the left button of the mouse Select the Programs file then the Rdspcsat file Now using the mouse click on the Rdspcsat program The following window will appear An error message may be received when the program is started for the first time due to the default parameters set which may not be suitable for your system The parameters of th...

Страница 20: ... therefore all the reading push buttons will be disabled A new push button called BURST will also be enabled which automatically repeats the transmission performed a number of Times equal to that set in the specific option This performance has been implemented to overcome the problem of any MTF s transmitted with the consequent incompleteness of the parameters sent BURST 3 Times 4 Times 10 Times a...

Страница 21: ... on the following values none even or odd Stop Bit This parameter may not be altered It is used to display the status of the Stop Bit For connections in downlink from satellite mode a baud rate of 9600 must be set unless requested otherwise in the technical specifications of the satellite downlink Once the communication parameters have been set communication must be enabled with the coder by sendi...

Страница 22: ...up of a maximum of 12 pairs of alternative frequencies Three push buttons are available in the part underneath In local configuration Read Config and Send Config will be enabled which are used to send or to read the options selected by means of the traffic lights In satellite configuration Send Config and Send Burst will be enabled which are used to send the options selected by means of the traffi...

Страница 23: ...on the Activate box of this PSN The number of the PSN page can be selected in the Page box from 0 9 which can be sent to the RDS by programming the PSN Plan Let s see what the push buttons are used for Read One reads the PSN selected Read All reads all the PSN s of the page selected Send One Page sends the PSN selected Send All Page sends all the PSN s of the page selected Read Active reads the pa...

Страница 24: ... board Radio Text tab The following window will be displayed Following the same programming procedure as that for the PSN enter the transmission Time sec of the string of characters then in the Radio Text box enter the text of up to 64 characters Up to 50 strings can be entered Let s now analyse the options of the P I N board ...

Страница 25: ...ed Now going on to a new setting the 4 figure PIN code will automatically be created The last box shows whether the setting has already been made Yes or whether it is still to be processed No Two different boards for programming the alternative frequencies will now be shown according to the mode selected AF Method A or AF Method B Bear in mind that the use of one method excludes the other ...

Страница 26: ...f this type of frequency causes the loss of another frequency therefore up to 25 frequencies with steps of 50 KHz can be entered or 12 frequencies with steps of 25 KHz or in a combined manner taking all explained earlier into account Once all the frequencies have been entered the setting can be sent to the coder using the Send push buttons If the local mode is being used the parameters already set...

Страница 27: ...ternative frequencies plus the main frequency To make the setting select the list desired Acomment concerning this group can be entered in the Description field Enter the MAIN FREQUENCY then the alternative frequencies in the other boxes Once a list has been completed it can be sent as a single list or in one go Likewise in local mode one or all the lists can be read using the Read push buttons ...

Страница 28: ...Manual Rev 1 0 03 08 05 The PTYN is an extension of the PTY Once the PTY type has been selected enter the specification of that type in the right box 8 characters at the most can be used For example PTY sport Name football ...

Страница 29: ...x and then in the PSN page enter the page bearing our setting 7 and finally enable the setting Enable On Again for example we want to broadcast page 5 at 12 00 every Wednesday In this case select the Plan Nr 011 page enter 12 00 in the Time box and click on Wednesday and then in the PSN page enter the page bearing our setting 5 and finally enable the setting Enable On If previous settings have not...

Страница 30: ... time zone difference this function is normally used inAmerica The DATE PSN function is used to decide in which PSN the date must appear The HOUR PSN function is used to decide in which PSN the time must appear The Send push button is used to send the update to the coder whereas the Read push button is used to read the information previously set ...

Страница 31: ...in transmission Language Identification Code then select the country Country Selection then the type of coverage Coverage area Selection and finally the ID The Extended Country Code and the right table are displayed together The Send push buttons are used to send the update to the coder whereas the Read push buttons are used to read the information set previously Let s now see the Traffic Program ...

Страница 32: ...e to the coder using the Send push button Use the Read push button to read the information set previously Let s now see the live controls window Press any one of the red push buttons to immediately transmit the functions in use to the coder with the exception of Program Type To do this make the selection using the combo box and then press the relative push button The Read option is enabled only in...

Страница 33: ...e coder using the Read and Send push buttons Let s now see some examples to better explain how to make the settings Supposing we have radio MISS which must make the setting with method A with radio JOY and with radio SUN Radio JOY has PI 5155 and frequencies 102 0 and 106 5 radio SUN has PI 5159 and frequencies 100 0 and 104 5 Select page no 0 enter the name of the first radio in the PSN box in ou...

Страница 34: ...93 5 94 0 radioABC has PI 5156 and frequencies 89 0 102 0 103 5 and 106 5 radio BOYS has PI 5160 and frequencies 98 0 e 100 5 Select page number 0 enter the name of the first radio in the PSN box in our case radio ABC Now enter the frequencies in the boxes at the side of AF Method B writings the frequencies of radio MISS are entered in the first column those of the associated radio in the second r...

Страница 35: ...ive to the network transmission can be attributed In particular using the LinkageActuator push button the network connection activation command is sent the Extended Generic Indicator which is a command not yet used the International Linkage which establishes whether the connection in use is of the national or international type and finally the Linkage Set Number which is the connection code ...

Страница 36: ...TRDS4002 32 42 User Manual Rev 1 0 03 08 05 We have still another board TA EON which is used only to send all the TA EON selected all together ...

Страница 37: ...fic Message Channel These functions have been designed in compliance with the Cenelec EN50067 standards and can be used only with special decoders 100 remote controls are available for the Transparent Data Channel whereas 31 remote controls are available for the Channels from 1 to 31 As usual the Send and Read push buttons are used for the usual functions ...

Страница 38: ...e are pointed out by the lighting up of the relative traffic light To modify a page retrieve it using the combo box From the editing window make the desired modifications and then save the page using the Write Page push button or send it using the Send push buttons A special decoder is required for this application too ...

Страница 39: ...04 of the CEN TC 278 WG7 for the specific codes The LTN code is found in this board Location Table Number together with the SID Service Identifier plus the setting of the coverage area which can be considered as an identification code of the sender similar to the PI All parameters required for the event description are provided in the following board ...

Страница 40: ...place in which the event has occurred The Diversion parameter establishes alternative routes The Repetition parameter establishes the repetition percentage of this compared to the other events pointed out The last board available in this program is called Edit Group This function is normally disabled as it allows the transmission percentages of the groups to be altered Therefore if unsuitable modi...

Страница 41: ...therwise errors may be produced in the program 15 groups split up intoA B are available At the side of each group an ON OFF push button is available If it is red it means that the group is disabled and if it is green it means that it is enabled The box with numbers indicates the transmission value of the group The default values are Group 0 A On 040 Group 1 A On 010 Group 2 A On 015 Group 4 A On 0...

Страница 42: ...een pre arranged RDSPCSAT rds loaded default configuration with all the most frequently used parameters OldLocal rds to be used only with previous versions of TRDS4002 and STARGATE MK1 they may be identified by the two 9 pin connectors on the back of the panel Full rds this configuration is used to modify all the parameters of the RDS coder ...

Страница 43: ...nel Description of rear panel controls 1 LINE INPUT Line input 2 19 KHz IN Input connector 19 KHz pilot only 3 MPX IN Output connector for MPX signal 4 MPX RDS OUT Output connector for MPX RDS signal Multi turn trimmer for level regulation from 0 to 700 mVpp 5 REMOTE Remote control connector 6 PRESET Dip switch for baudrate and other function 7 RS232 Serial port connector ...

Страница 44: ...onnector BNC grounded to chassis 7 2 Data Syncrhonization Terminal Interface RS232 C at rear asynchronous Data Input Full duplex Format Selectable Transmission Speed 2400 19600 baud Connector 9 contact subminiature cannon female RDS Data management Microprocessor controlled 128 Kbyte Non volatile memory RAM data retention 10 years 7 3 Remote I O MS TA RDS OFF Cmos level Connector 25 pin subminiatu...

Страница 45: ...TRDS4002 41 42 User Manual Rev 1 0 03 08 05 7 5 Connection PC RS232 7 6 Sample connection Remote ...

Страница 46: ...a R d u a B e e S e l b a T s s a p y B e l b a t s i b A T N O S D R E T O M E R N O d e v r e s e R d e v r e s e R a l l e b a T i d e V e t a R d u a B e t a r e p O A T e l b a t s o n o m F F O S D R E T O M E R F F O d e v r e s e R d e v r e s e R Preset dip 1 p i D 2 p i D 0 0 4 2 0 0 8 4 0 0 6 9 0 0 2 9 1 Baud Rate dip ...

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