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Inovonics 712, Инструкция по программированию и эксплуатации

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12

SELECTION OF OPERATING MODES

Sidechain Mode

Configured for sidechain operation, the rear-panel

PILOT OR MPX

INPUT

 connector simply bridges (monitors) the output of the stereo

generator to derive timing information from the 19kHz stereo pilot.

Alternatively, a TTL-level 19kHz sync squarewave may be applied

to this input.  We do not recommend this, however, because the

phase relationship between the synchronizing squarewave and the

19kHz pilot component in the composite, multiplex output of the

stereo generator may not be assured.

In sidechain operation the

RDS OR MPX OUTPUT

will contain

only

the RDS subcarrier, the composite/MPX signal is

not

routed through

the 712.  This operating mode best preserves multiplex signal

integrity and assures uninterrupted program transmission in the

event of a catastrophic encoder failure (never happens!).  As

delivered, the 712 is configured for sidechain operation.
Referring to the jumper installation drawing, Figure 2, below, locate

the 3-terminal jumper strip, located just behind the rear-panel RDS

OR MPX OUTPUT connector on the Model 712 circuit board.  The

shorting clip is positioned to the

left

 for sidechain operation, as

shown in the upper example of Figure 2.

Loop-Through

Mode

When the Model 712 is jumpered for loop-through operation, the

RDS subcarrier is internally combined with the composite/MPX

signal.  This means that the

RDS OR MPX OUTPUT

will include

 the

composite/MPX program signal (at unity gain) with the RDS

subcarrier added.
The lower illustration in Figure 2, below, shows the position of the

shorting clip, toward the

right

, for loop-through operation.

Figure 2  -

Encoder Mode Jumpering

Sidechain

Mode

Loop-Through

Mode

Содержание 712

Страница 1: ...ING AND OPERATION INSTRUCTION MANUAL MODEL 712 R D S RADIO DATA SYSTEM RADIODATA ENCODER interstage Phistersvej 31 2900 Hellerup Danmark Telefon 3946 0000 fax 3946 0040 www interstage dk pro audio with a smile ...

Страница 2: ...CTION 10 MOUNTING 10 Rack Requirement Heat Dissipation AC MAINS POWER 11 Fuseholder Mains Voltage Selector Power Cord RADIO FREQUENCY INTERFERENCE RFI 11 Location Ground Loops SELECTION OF OPERATING MODES 12 Sidechain Mode Loop Through Mode CONNECTING THE MODEL 712 13 Sidechain Mode preferred Loop Through Mode Manually Activating the TA Flag DATA INTERCONNECTION 14 Computer or Terminal Requirement...

Страница 3: ...ersion STATIC DATA PROGRAMMING 23 PI Calculation PS PTY TP TA TA Timeout AF DI M S RT Radiotext Rate Free Format Group Saving Entries SCROLLING DISPLAYS AND DYNAMIC ENCODER OPERATION 30 Safety Considerations Radiotext Dynamic PS Block Transmission True Scrolling Selecting the Dynamic Mode Enabling Dynamic PS and Setting the Refresh Rate Entering Dynamic PS Text Section IV APPENDIX TABULATED LISTIN...

Страница 4: ...tablished term RDS will be used throughout this Manual General Inovonics 712 is a complete full function digital data encoder for quickly and easily implementing RDS at any FM radio station In addition to static IDs traffic and other flags The 712 supports dynamic data for sending song titles advertising messages and specialized in house applications to the listener s radio Features Leading featur...

Страница 5: ...onitored MPX or TTL sync is used solely to synchronize the 57kHz RDS subcarrier with the 19kHz stereo pilot Pilot or MPX Input An unbalanced bridging BNC input that accepts either the composite multiplex MPX signal or 19kHz TTL level pilot sync from the stereo generator RDS or MPX Output An unbalanced low impedance BNC output to feed a wideband input of the FM exciter RDS Injection Level Continuou...

Страница 6: ...VICING TO QUALIFIED TECHNICAL PERSONNEL Nonetheless Inovonics does of course fully support the Model 712 and will provide detailed service information upon request including sources for the few replaceable parts and direct replacements for firmware proprietary integrated circuits Figure 1 Block Diagram Model 712 RDS Encoder DAC DIGITAL CONTROL CPU RDS SYNTH DATA RAM CODE DATA ROM PROGRAMMABLE EEPR...

Страница 7: ...ough for most of the broadcast day even NPR stations originate or at least schedule their own programs Much of European broadcasting is similar to the concept of network radio that was common in the US prior to the 1950s In Europe a central program originator may have many transmitting facilities of modest power situated throughout the country The European disposition toward lower power transmitte...

Страница 8: ... automation system The Model 712 does not feature TCP IP connectivity to enable online control via the Internet However third party hardware and appropriate software may be used with the 712 for this purpose Particularly in Europe RDS encoders may be linked with one another for network support applications The UECP or Universal Encoder Communication Protocol was developed by CENELEC to support thi...

Страница 9: ...that might be shared by broadcasters in nearby regions PS Program Service Name This is the station s street name that will appear on the receiver faceplate display The PS can be up to eight characters in length including spaces and can be as simple as the station s call letters KWOW or KWOW FM or a slogan NEWSTALK or LIVE 95 The Program Service Name is automatically displayed even on automobile re...

Страница 10: ...nnouncement This is a temporary flag added to the RDS data stream only as a traffic bulletin is being aired Some RDS car radios can be set to search for traffic bulletins among various TP stations see TP below while tuned to a listener s preferred program or even while playing a tape or CD As soon as any TP station broadcasts a traffic bulletin the receiver temporarily switches over to receive it ...

Страница 11: ... under terms of the Warranty and provide a means of tracing lost or stolen gear but also the user will automatically receive specific SERVICE OR MODIFI CATION INSTRUCTIONS should the factory issue them MOUNTING Rack Requirement The Model 712 mounts in a standard 19 inch equipment rack and requires only 1 inches 1U of vertical rack space The use of plastic washers is recommended to protect the pain...

Страница 12: ...rear panel You can remove the factory strikethrough with a carcinogenic solvent and then cross out the inappropriate marking with an indelible felt pen Power Cord The detachable IEC type power cord supplied with the encoder is fitted with a North American standard male plug The individual cord conductors may be color coded in either of two ways 1 In accordance with US standards BLACK AC HOT WHITE ...

Страница 13: ...d assures uninterrupted program transmission in the event of a catastrophic encoder failure never happens As delivered the 712 is configured for sidechain operation Referring to the jumper installation drawing Figure 2 below locate the 3 terminal jumper strip located just behind the rear panel RDS OR MPX OUTPUT connector on the Model 712 circuit board The shorting clip is positioned to the left fo...

Страница 14: ...ne side of the directly to a wideband composite MPX input of the FM exciter and the other side to the PILOT OR MPX INPUT of the Model 712 This is only a bridging sync connection when the circuit board has been jumpered for sidechain operation and does not affect the composite MPX signal If the stereo generator has a dedicated 19kHz TTL level output designated for RDS encoder sync you may connect t...

Страница 15: ...which will doubtless prove faster more convenient and more reliable than software control of the TA function A run of single conductor shielded cable may be taken from the TA CONTROL BNC connector on the rear panel of the encoder to a normally open momentary spring return pushbutton switch located conveniently at the announcer s operating position The TA flag will be transmitted as long as the swi...

Страница 16: ...essaging This may be a hard disk based station automation system that provides song title and artist plus ads or station promos The automation system must be configured to the encoder s baud rate and programmed to deliver dynamic data in proper syntax as explained in Section IV If you simply want to hand type ads or promos at the time of transmission the encoder may remain connected to the compute...

Страница 17: ... that the encoder has defaulted to its internal timebase RS 232 ACTIVITY As the encoder is being addressed either by a computer or terminal for static programming or by station automation for uploading of song titles or advertising this LED shows 2 way activity of the serial interface RDS DATA This LED flashes as RDS data is being transmitted serving as an indication that the encoder is operating ...

Страница 18: ...at includes a subcarrier measurement utility Alternatively a basic mod monitor can be used alone but program modulation and the stereo pilot must be turned off to resolve the low RDS injection level NOTE If using a mod monitor that does not have separate subcarrier measurement ability keep in mind that mod monitors are peak responding for total modulation readings near 100 modulation but may be av...

Страница 19: ...ync reference for RDS usually a TTL level squarewave this reference may or may not be in exact phase with the actual stereo pilot component of the composite MPX signal For this reason we recommend using the composite MPX signal for synchronization In the sidechain mode the Model 712 simply bridges the output of the stereo generator and does not load or otherwise compromise the composite MPX signal...

Страница 20: ...for naming your encoder communications program below left Type RDS and click OK This opens a Connect To window below right Click Connect Using and select Direct to Com1 unless there is a reason to use another serial COM port Click OK The next window that appears shows COM1 Properties Here you set the communications parameters as follows Bits per second 9600 Data bits 8 Parity None Stop bits 1 Flow...

Страница 21: ...th pins 2 and 3 of the DB 9 connector shorted with a screwdriver whatever is typed on the keyboard should appear on the screen Connect and Turn On NOW connect the computer to the encoder s RS 232 LINK port and apply AC power to the encoder The HyperTerminal screen should show the word Ready as the encoder is powered up as shown in the first screen shot on the right Next type 8 two question marks f...

Страница 22: ... sets and may display ambiguous lowercase characters or gibberish To assure readability keep the keyboard Caps Lock key engaged and avoid fancy punctuation Smileys are not a good idea Correcting Mistakes Under HyperTermnal use the Enter key to drop to a new line if required and use either the Backspace key or the keyboard s directional arrows to navigate within a text entry Overtyping an entry wil...

Страница 23: ...d hexadecimal PI value Invalid call letters substitution ENCODER COMMUNICATIONS SETTINGS Basic encoder communications settings have been preset at the factory at default values Communications commands must use proper syntax as described above and preferably typed in ALL CAPS for reasons already given Communication Speed The encoder defaults to 9600 8 N 1 ASCII communications To change just the bau...

Страница 24: ...l entry is complete Encoder Reset Typing RESET8 initiates a hardware reset equivalent to turning the encoder off and back on again This reset command does not clear the registers of programming commands that have been saved as described above Firmware Version Type REV8 for a display of the encoder s firmware version This might prove important in determining whether differences exist between Model ...

Страница 25: ...umber value of the third letter of your call multiply it by 26 and add it to the column A 0 X 26 0 3 Take the number value of the second letter of your call multiply it by 676 and add it to the column W 22 X 676 14872 4 If your call begins with a K add 4069 to the column If it begins with a W add 21672 K add 4096 4096 ______ 5 Add the column up 18989 This gives a decimal number value for your call...

Страница 26: ...PS can be found on Page 30 PTY Program Type indicates the station format The listings shown below were assigned by the NRSC in the United States and by CENELEC for the rest of the world Be sure to select your format from the proper list The numbers in the PTY column indicate the categories listed in the appropriate standards Enter this number into the encoder s PTY field by typing PTY n8 or PTY nn...

Страница 27: ...o the Standards Group Don t ask us this is not in our job description The PTY identifier can be made into a semi dynamic function It can be changed from one entry to another if your station dayparts alters formats during specific extended periods The PTY should not change from song to song or to accommodate a 5 minute newscast however TP If yours is a station that transmits travel advisory updates...

Страница 28: ... signal of the identical program either from another station on a network or from a rebroadcast translator The Model 712 has nine registers for alternative frequencies Each register must have a numerical value assigned and entered into it Any register that is not used for an alternative frequency must have a 0 zero value inserted The factory default is a zero in all registers Alternative frequency...

Страница 29: ...3 148 107 4 199 92 2 47 97 3 98 102 4 149 107 5 200 92 3 48 97 4 99 102 5 150 107 6 201 92 4 49 97 5 100 102 6 151 107 7 202 92 5 50 97 6 101 102 7 152 107 8 203 92 6 51 97 7 102 102 8 153 107 9 204 To enter the alternative frequency of 98 1MHz into register one type AF1 1068 To enter the alternative frequency of 107 7MHz into register two type AF2 2028 Enter a value into all nine registers If onl...

Страница 30: ... IDs and flags to speed the radio s search for formats traffic information and alternative frequencies The tradeoff is that text messages are sent and updated less frequently There will always be a tradeoff between Radiotext throughput and speed of other RDS functions including AF seek and either static or scrolling PS displays The Radiotext update rate is programmed by typing DRTS n8 with n a num...

Страница 31: ...heel is more heads up than the radio faceplate but do these scrolling display proponents condone reading while driving we wonder It is our recommendation to relegate visual readouts to display only essential information and in a manner that poses the least distraction Radiotext Radiotext is transmitted as a 64 character block of data The presentation of this display has been left to receiver manuf...

Страница 32: ...message can be counted on to repeat a missed portion could be caught next time around But if a lot of information is flying along at a good clip the data deprived driver could easily be distracted True Scrolling The Model 712 can be programmed to send dynamic PS messages by the block method if text is properly formatted ahead of time In the interest of safety however Inovonics has developed an alt...

Страница 33: ...an update in the PS field A fast setting for scrolling text could display only gibberish on some radios Entering Dynamic PS Text Dynamic PS messages are held in encoder memory as 64 character maximum text strings This makes it possible to consolidate short words and hyphenate longer ones to fit successive 8 character display screens in the case of the block mode If the safer scrolling PS mode is u...

Страница 34: ...50 x51 x52 x53 x54 x55 x56 x57 x58 x59 x60 x61 x62 x63 x64 Note that in this case text is entered without need for special formatting perhaps just as it comes from station automation In both cases there is sufficient space available to add further information such as ON KWAV or A M RECORDS If no text is entered in the blank trailing fields the message will begin repeating from the beginning once t...

Страница 35: ...annel in 100kHz increments 87 6MHz to 107 9MHz Decoder Information DI 1 digit HEX number defines mono or 2 channel mode M S MS 0 or 1 0 speech only 1 music Radiotext TEXT 64 max ASCII characters Dynamic Radiotext Speed DRTS 0 to 9 0 Radiotext off 1 to 9 update rate slow to fast RS 232 Serial Baud Rate SPEED 2400 or 4800 or 9600 or 115200 Command Echo ECHO 0 or 1 0 echo off 1 echo on COMMAND SPECIA...

Страница 36: ...are warranted to be free from defects in materials and workmanship A Any discrepancies noted within 90 days of the date of delivery will be repaired free of charge or the equipment will be replaced with a new or remanufactured product at Inovonics option B Additionally parts for repairs required between 90 days and one year from the date of delivery will be supplied free of charge Labor for factor...

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