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Summary of Contents for Inovonics 720
- Page 1 PROGRAMMING AND OPERATION INSTRUCTION MANUAL MODEL 720 R D S RADIODATA ENCODER ADIO YSTEM...
- Page 3 USER S RECORD Model 720 Serial No. ____________ Date Purchased __________________ Warranty Card Mailed? PROGRAMMING AND OPERATION INSTRUCTION MANUAL MODEL R D S RADIODATA ENCODER ADIO YSTEM Rev. 1 February, 2008 (Initial Release) 1305 Fair Avenue Santa Cruz, CA 95060...
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Page 5: Table Of Contents
THE SYSTEM DEFINED ..................RDS: EUROPE vs. AMERICA ................... RDS vs. RBDS or What s in a Name? RDS APPLICATIONS SUPPORTED BY THE MODEL 720 ........COMMUNICATING WITH THE MODEL 720 ENCODER ........Section III - SOFTWARE INSTALLATION AND FIRMWARE SETUP INSTALLING THE SOFTWARE ................ - Page 6 TRAFFIC ALERTS ....................TA Time WRITING TO AND READING FROM THE ENCODER ..........ADDRESSING THE 720 WITH A SERIAL LINK ............Serial Connection Changing Baud Rates Auto-Detect Dual Addressability THE SOFTWARE TERMINAL UTILITY ..............Updating Registers Using the Terminal Utility...
- Page 7 Encoder Data Formatting Power Supply Section VII - APPENDIX ENCODER COMMANDS AND PROMPTS ............. US AND EUROPEAN PTY LISTINGS ..............ALTERNATIVE FREQUENCY CHANNEL NUMBERS ..........COMPONENT PARTS LIST ................... PARTS SUPPLIERS ....................SCHEMATIC DIAGRAMS ..................INOVONICS WARRANTY ............(INSIDE BACK COVER)
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Page 8: Section I - Introduction
The front-panel LCD screen, built-in diagnostics and safeguards of- fered for the first time in the Model 720, allow for near-foolproof RDS implementation at any FM radio station. Every step has been taken to guarantee simple, straightforward and safe operation. -
Page 9: Model 720 Technical Specifications
19kHz TTL-level pilot sync from Windows® PC for either USB or se- the stereo generator. In the ab- rial (COM) port operation. The sence of a 19kHz signal, the 720 re- verts to an internal crystal time- software is intuitive, self-guiding base. -
Page 10: Block Diagram
BLOCK DIAGRAM Figure 1 is a simplified Block Diagram of the Model 720. A full set of schematics may be found in the Appendix, Section VII, and ac- companying circuit descriptions begin on Page 37. RDS/MPX OUTPUT SIDE LOOP BYPASS... -
Page 11: Section Ii - The Radio Data System
Specification. It is assumed that the user has some familiarity with the concept of RDS since the balance of this Manual will deal with specific implication of RDS implemented with the Inovonics Model 720 Encoder. In particular, the explanations of the various messaging and house-... -
Page 12: Rds Applications Supported By The Model 720
The principal utility of this RDS function is with European radio net- works and US stations with translators. The 720 can hold as many as 25 Alternative Frequencies. This is one of several flags that convey yes/no Decoder Information: or other very basic data. - Page 13 NRSC standards to flash or scroll the PS display. Nevertheless, this nefarious practice of Scrolling-PS has become very common, both in the US and abroad. The Model 720 has various modes for mes- sage scrolling that offer a safe alternative to the static PS display.
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Page 14: Communicating With The Model 720 Encoder
COMMUNICATING WITH THE MODEL 720 ENCODER The 720 may be addressed either by an RS-232 serial link or through the front-panel USB port. Either port may be used for ini- tial setup of the static flag and message registers, and Model 720 software serves both methods with an intuitive data-entry screen and self-guided help. - Page 15 Internet. Inovonics does offer RDS encoders that do provide a direct network connection. However, a third-party IP-to-serial converter functioning as a telnet server may be used with the 720 to offer TCP/IP connectivity. Early RDS deployment in Europe included a provision to link RDS encoders with one another for network support applications.
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Page 16: Section Iii - Software Installation And Firmware Setup
First! 720 Encoder. The same software is used for either USB or serial connection between the computer and the Model 720. 720 software utilizes components of Microsoft s dot-NET frame- Microsoft work. -
Page 17: Installing The Usb Driver
USB driver, whether or not the encoder s USB port will be your primary means of addressing the unit. At this time, power-up the Model 720 and connect it to the computer Installing the using the USB cable provided. -
Page 18: Data Entry
With the computer and encoder USB ports connected, double-click the Model 720 Desktop icon. This should bring up the data-entry window shown below. Check first at the bottom of the window that the words USB Connected are displayed as indicated in the illustra- tion. -
Page 19: Rds/Rbds
(and lost in history) the DI Switch DI options originally included in the CENELEC specification. An important feature of the 720, and one that sets it apart from ear- Header lier models and most competitive products, is the ability to transmit scrolling-PS messages from raw, unformatted ASCII text. -
Page 20: Pi And Pty Codes
RDS radios may actually tune away from a station transmitting RDS data groups that do not include a valid PI code. When the Model 720 is operated in the European RDS mode, the 4- character, hexadecimal PI code is typed directly into the PI box. -
Page 21: The Ps Field - Static And Scrolling
North American RBDS specification. The two lists are shown side-by-side in the Appendix. The appropriate PTY list is automatically loaded when the 720 is set for the proper operating mode (RDS or RBDS) as explained previ- ously in the Menu Bar discussion. - Page 22 An entry typed into the DPS field will be entered into non-volatile encoder memory once the WRITE button has sent it to the 720. This allows programming the encoder at the studio and then relocating it to the transmitter site.
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Page 23: Radio Text
RADIO TEXT Radio Text is a separate 64-character message that is transmitted to the radio as a complete message; that is, it is not parsed by the 720 Encoder. The Radio Text message is held in buffer memory within the RDS receiver, and then scrolled or otherwise displayed in a manner determined by the receiver manufacturer. -
Page 24: Alternative Frequencies
This turns Radio Text off completely and grays-out the text entry field. ALTERNATIVE FREQUENCIES As mentioned on Page 8, the 720 accommodates as many as 25 Al- ternative Frequencies, the maximum number supported by the RDS/RBDS specification. These are other dial locations where the very same program can be heard at the very same time (in sync!). -
Page 25: Traffic Alerts
(or modem) connection, provision has been made to set the TA flag with a software command. Nevertheless, the TA box on the 720 software screen may be checked to initiate a TA flag. The flag is then transmitted immediately when the WRITE button is clicked. -
Page 26: Writing To And Reading From The Encoder
720 will not respond to an improper incoming baud rate. You will Baud Rates have to know what baud rate the 720 is set to, establish communica- tions at that rate, and then reset the computer baud rate if this is the aim. -
Page 27: The Software Terminal Utility
Windows® software may be done in exactly the same manner as already has been described for the USB connection. With the 720 connected to station automation via the serial port, a Dual computer may still be plugged into the front-panel USB port to give Addressability simultaneous, dual connectivity. - Page 28 If you make a mistake, just press Enter and start over. Your mistake will be sent and saved in 720 memory, but if you update the error promptly it s doubtful that anything untoward will be noticed. This illustrates the advisability of using the 720 software, rather than the terminal utility, for entering text.
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Page 29: Automation Syntax Requirements
AF2=97.18 . Up to 25 Alternative frequencies may be entered in this manner. To clear the example second entry from the AF list, for example, type AF2=08 . The 720 will resort the list, so AF slot numbers may change. Do a ?? 8 inquiry to view the updated list. -
Page 30: The Free Format Groups
RDS radios, contingent upon appropriate settings in the Parse and DPSS fields. This can be tested by setting the 720 for this mode (click Format, then Header, and check No (Satellite Streaming). Once in this mode, bring up the terminal utility and type your text into the box. -
Page 31: Encoder Housekeeping Commands
720 Encoder. The necessary checksums are automatically handled by the 720. Consult the applicable RBDS or RDS Standard for more information on using RAW data commands. ENCODER HOUSEKEEPING COMMANDS... -
Page 32: Section Iv - Encoder Installation
This fuse also serves as a front-panel emergency power disconnect for the Model 720. Unless specifically ordered for export shipment, the 720 is set at the Mains Voltage factory for operation from 115V, 50/60Hz AC mains. This can be... -
Page 33: Radio Frequency Interference (Rfi)
BLUE = AC NEUTRAL GRN/YEL = EARTH GROUND RADIO FREQUENCY INTERFERENCE (RFI) Although it is expected that the 720 to be installed alongside high- Location power transmitters, please practice reasonable care and common sense in locating the unit away from abnormally high RF fields. -
Page 34: Connecting The Model 720
(Preferred) posite/MPX) input of the FM exciter and the other side to the PILOT OR MPX INPUT of the Model 720 as shown in Figure 3. This is only a bridging sync connection with the circuit board jumpered for sidechain operation and does not affect the composite/MPX signal. - Page 35 In the loop-through mode, the output of the stereo generator is ca- Loop-Through bled directly to the PILOT OR MPX INPUT of the Model 720 as shown Mode in Figure 4. Connect the RDS OR MPX OUTPUT of the encoder to a composite/MPX wideband input of the FM exciter.
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Page 36: Data Interconnection
If a composite STL is used between the studio and the transmitter Composite STL site, the 720 encoder may be kept at the studio for direct connection with station automation. Figures 3 and 4 still apply, with the STL transmitter taking the place of the FM exciter. -
Page 37: Cables Made In-House
Requirements gram that is part of the 720 software package (see Page 23). A sim- ple dumb RS-232 terminal and, of course, station automation may also address the encoder directly. The encoder can accommodate multiple baud rates, but the factory default is 9600 baud. -
Page 38: Section V - Encoder Operation
Section V ENCODER OPERATION THE FRONT PANEL LCD DISPLAY The Inovonics 720 Encoder is nominally menu driven, which in this case simply means that contents of internal data registers, plus data-on-the-fly and a readout of the subcarrier voltage level, may be viewed on the front-panel LCD display using the s (up) and t(down) buttons to cycle through a number of different screens. -
Page 39: Setting The Subcarrier Injection Level
RDS OR MPX OUTPUT. The level of the compos- ite/MPX program signal will typically be in the 3- to 5-volt p-p range. The same 0-3V RDS subcarrier level capability of the 720 is available in the loop-through mode as well, so obviously the INJECTION LEVEL ADJUST control will be closer to the counterclockwise end of its travel to give a level in the 0.16 volt p-p range corresponding to... -
Page 40: Subcarrier Phase
Figure 7 Subcarrier In Quadrature The Model 720 is skillfully and meticulously aligned at the factory to ensure that the subcarrier is in phase with the stereo pilot, whether the encoder is used in the sidechain or in the loop-through operating mode. -
Page 41: Section Vi - Circuit Descriptions
Section VI CIRCUIT DESCRIPTIONS INTRODUCTION This Section details the circuitry of the Inovonics Model 720 RDS/RBDS RadioData Encoder. Circuit descriptions refer to the two pages of Schematic Diagrams contained in the Appendix, Sec- tion VII. Schematics for the 720 may appear to have component reference... - Page 42 The segmented RDS waveform from the D/A resistor ladder is Band-Pass passed through dual band-pass filter stages, IC6B and IC6A. This Filter 57kHz filter removes higher-order distortion components inherent to the digital-synthesis process. R3 is the front-panel INJECTION LEVEL ADJUST control that deter- mines the magnitude of the RDS subcarrier at the encoder output.
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Page 43: Section Vii - Appendix
Section VII APPENDIX This section of the Model 720 Manual con- tains Certain Tabulated Items, Parts Listings, Schematic Diagrams and an explanation of Inovonics Most Generous Warranty Policy. -
Page 44: Encoder Commands And Prompts
Initializes the encoder to all factory defaults. RESPONSE MEANING The command is properly formatted and has been received and executed by the encoder. Incoming data is not properly formatted and has not been executed by the encoder (NONE) Data sent is ignored by the Model 720. -
Page 45: Us And European Pty Listings
US AND EUROPEAN PTY LISTINGS PTY US (NRSC) RBDS EUROPE (CENELEC) RDS None None News News Information Current Affairs Sports Information Talk Sports Rock Music Education Classic Rock Music Drama Adult Hit Music Culture Soft Rock Music Science Top 40 Music Varied Country Music Pop Music... -
Page 46: Alternative Frequency Channel Numbers
ALTERNATIVE FREQUENCY CHANNEL NUMBERS CHAN CHAN CHAN CHAN 87.6 92.7 97.8 102.9 87.7 92.8 97.9 103.0 87.8 93.9 98.0 103.1 87.9 93.0 98.1 103.2 88.0 93.1 98.2 103.3 88.1 93.2 98.3 103.4 88.2 93.3 98.4 103.5 88.3 93.4 98.5 103.6 88.4 93.5 98.6... -
Page 47: Component Parts List
COMPONENT PARTS LIST NOTE: The majority of components used in the Inovonics 720 RDS/RBDS RadioData Encoder are surface-mounted parts, which are very difficult to remove and replace in the field. We therefore recommend returning the unit to the factory should repair become necessary. -
Page 48: Parts Suppliers
Inovonics strives to maintain factory stock of all parts used in the products we manufacture. A large proportion of the components in the 720 is generic and may be obtained from a wide variety of sources. A few parts are more-or-less proprietary. - Page 49 Nearly any semiconductor, IC, capacitor, resistor or connector used in the Model 720 will be available from one or more of these firms. Each supplier maintains a Website and publishes a full-line printed catalog, which is free for the asking.
- Page 52 NOTES AND DOODLES:...
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Page 53: Inovonics Warranty
CONDITIONS OF WARRANTY: The following terms apply unless amended in writing by Inovonics, Inc. A. The Warranty Registration Card supplied with this product must be completed and returned to Inovonics within 10 days of deliv- ery. B. This Warranty applies only to products sold as new.
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