Pira32Manual

Pira32Manual
PIRA32 RDS Encoder
Technical Manual
Version 1.5d
Web: http://www.pira.cz/rds/
E-mail: [email protected]
2
Table of Contents
1
Introduction............................................................................................................................................................................... 3
Main Highlights.................................................................................................................................................................... 3
Other Features....................................................................................................................................................................... 3
2
Technical Specifications.......................................................................................................................................................... 4
3
Block Diagram .......................................................................................................................................................................... 5
4
Physical Description ................................................................................................................................................................ 6
4.1
Board Layout......................................................................................................................................................................... 6
4.2
Connectors............................................................................................................................................................................. 6
4.3
Adjustable Elements............................................................................................................................................................. 6
4.4
LED Indicators ...................................................................................................................................................................... 6
5
Installation and Setting-up..................................................................................................................................................... 7
5.1
Connection ............................................................................................................................................................................ 7
5.2
Jumper Settings..................................................................................................................................................................... 8
5.3
Power Supply........................................................................................................................................................................ 9
5.4
Level and Phase Adjustment .............................................................................................................................................. 9
5.5
Setting Basic RDS Data ...................................................................................................................................................... 11
6
Dynamic PS Text .................................................................................................................................................................... 14
7
Alternative Frequencies ........................................................................................................................................................ 15
7.1
Method A............................................................................................................................................................................. 15
7.2
Method B ............................................................................................................................................................................. 16
8
Enhanced Other Networks information (EON) control................................................................................................... 17
9
Weekly Scheduling ................................................................................................................................................................ 18
10
Broadcast Automation System Link-up.............................................................................................................................. 19
10.1 Indirect Link........................................................................................................................................................................ 19
10.2 Direct Link........................................................................................................................................................................... 19
11
COM Port Communication................................................................................................................................................... 21
11.1 Connecting the RDS Encoder to a PC .............................................................................................................................. 21
11.2 Working with a Terminal Application ............................................................................................................................ 21
11.3 Command Interpreter ........................................................................................................................................................ 22
11.4 Additional Information...................................................................................................................................................... 23
12
List of Commands .................................................................................................................................................................. 25
12.1 Command Summary.......................................................................................................................................................... 25
12.2 Basic Commands ................................................................................................................................................................ 27
12.3 EON Commands................................................................................................................................................................. 33
12.4 Messages Commands......................................................................................................................................................... 34
12.5 Scheduling Commands...................................................................................................................................................... 35
12.6 System Commands............................................................................................................................................................. 36
12.7 Advanced Commands ....................................................................................................................................................... 38
12.8 Memory Organization ....................................................................................................................................................... 43
12.9 Dynamic PS 1 and Dynamic PS 2 Summary ................................................................................................................... 43
13
Further Features ...................................................................................................................................................................... 44
13.1 Bypass Relay ....................................................................................................................................................................... 44
13.2 LED Indication.................................................................................................................................................................... 44
13.3 External Program Switch................................................................................................................................................... 44
13.4 External TA/EON1TA Switch .......................................................................................................................................... 44
13.5 Showing Real Time in Dynamic PS.................................................................................................................................. 45
13.6 Addressing .......................................................................................................................................................................... 45
13.7 Expansion IIC Bus .............................................................................................................................................................. 46
13.8 Real-Time Backup............................................................................................................................................................... 46
13.9 Firmware Upgrade ............................................................................................................................................................. 46
13.10 On-line Support .................................................................................................................................................................. 46
14
Universal Encoder Communication Protocol (UECP)...................................................................................................... 47
14.2 Traffic Message Channel (TMC) Application Notes...................................................................................................... 49
15
Annexes .................................................................................................................................................................................... 50
15.1 Communication Protocol Implementation Flowcharts ................................................................................................. 50
15.2 RDS Group Format............................................................................................................................................................. 53
15.3 Troubleshooting.................................................................................................................................................................. 56
1.1
1.2
3
1
Introduction
The PIRA32 RDS encoder is a result of more than 10 years experience collecting and meets requirements of most
regional, local, RSL, LPFM and other medium- and small-coverage radio stations. It’s also highly suitable for service
and development purposes.
Fully digital concept and uniquely effective design ensures high reliability, excellent signal characteristics and gives
the user many advanced features while maintaining low acquisition costs. We can say the PIRA32 brought new
standard to this branch.
1.1 Main Highlights
1.2
Fully dynamic stand-alone RDS encoder
RS-232 control interface based on a set of simple ASCII commands; UECP supported
Control software includes powerful Windows GUI application
Amazing text features, 25 kB of memory reserved for text messages (equivalent to more than 3200 PS
strings)
Excellent compatibility with broadcast automation systems
Advanced weekly scheduling
Easy and fast set-up
Other Features
Excellent spectral purity, direct digital RDS signal synthesis at sampling rate of 361 kHz (oversampled);
compliant with EN 50067 / EN 62106
Firmware updates are free
Addressing feature - individual or common control of more than 64000 encoders in a network
Bypass relay, high reliability
External TA and Program switch
Switchable MPX loopthrough mode
Internal real-time clock incl. backup battery, showing real-time also as PS
No special 19 kHz input needed - pilot tone carefully recovered from MPX signal
Digital 57 kHz phase locked loop - rock stable RDS subcarrier in all cases
CE conformance notice:
This device complies with the requirements of the EEC Council CE marking and EMC directives.
Harmonized standards applied: EN 55022 (B ITE class), EN 55024.
Please read this entire manual and familiarize yourself with the controls before attempting to use this equipment.
Where not otherwise indicated, any information mentioned in relation to the RDS (Radio Data System) applies in full
also to the RBDS (Radio Broadcast Data System).
The equipment has been thoroughly tested and found to be in proper operating condition when shipped. The
manufacturer is not liable for any damages, including but not limited to, lost profits, lost savings, or other incidental or
consequential damages arising out of the use of this product.
No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical,
including photocopying, recording or information storage and retrieval systems, for any purpose other than the
purchaser's personal use.
Information in this document is subject to change without notice.
If you have any questions or comments regarding this document, please contact us via email.
We welcome your feedback.
Revision 2011-10-22
Copyright © 1999-2011 Pira.cz
4
2
Technical Specifications
Parameter
Condition
Value
JP1: 1-2
8 - 15 V DC
JP1: 2-3
8 - 15 V DC stabilized
12 V
60 mA (100 mA with LCD module)
General
Supply voltage
Supply current
Signal connectors
unbalanced BNC
Data connector
RS-232 (DTE, 9 pins), bi-directional
Communication speed
software switchable 1200, 2400, 4800, 9600, 19200 bps
Communication mode
1 stop bit, 8 data bits, no parity, (no flow control),
ASCII or UECP (SPB 490)
TA switching
software or external switch
TA/EON1TA input
TTL with 10 kΩ pull-up, level or falling edge activated
Program switching
software or external switch
Program input
TTL with 10 kΩ pull-up, level controlled
Expansion bus type
IIC, 400 kHz
PI, PS, PTY, TP, AF, TA, DI, M/S, PIN, RT, RT+
TMC, EON, PTYN, ECC, LIC, TDC, IH, CT, ODA
RDS Services directly supported
RDS signal
Subcarrier frequency
57 kHz
Sampling rate
361 kHz
Bandwidth
± 2.4 kHz (50 dBc)
Output level adjust
default
0 - 1.4 V p-p
Phase shift adjust
stereo
transmission
Full range, in 9.5 deg. steps
Audio/MPX/Pilot input
Recommended load impedance
Recommended MPX voltage
Passthrough voltage gain
mono
stereo MPX
< 2 kΩ
JP1: 1-2
1.3 - 3.3 V p-p
JP1: 2-3, 12 V
1.3 - 8.0 V p-p
2 Hz - 100 kHz
1 (0 dB)
Pilot tone level
min. 120 mV p-p (-26 dBu)
- recommended FM deviation
6.8 kHz
Pilot PLL capture range
Stereo encoder pilot frequency
required
< 10 kΩ
8 Hz
stereo
transmission
19000 Hz ± 2 Hz
Output
Output impedance
100 Ω
Recommended load impedance
> 70 Ω, < 1 nF, no DC offset
Max. output voltage
(RDS + MPX)
Recommended RDS level
Notes:
JP1: 1-2
3.6 V p-p
JP1: 2-3, 12 V
9.0 V p-p
3 - 11 % of MPX
p-p - peak-to-peak value
The unit can operate with mono transmitter as well.
5
3
Block Diagram
Input
JP2
Output
Relay
TR1
A
19 kHz
pilot
recovery
D
EEPROM
memory
CPU
TR2
Enh. bus
RS-232
interface
TA
RS-232
PRG
LED1
LED2
D
A
1
3
+5 V
Power
supply
JP1
Created with Visio
6
4
Physical Description
4.1
Board Layout
4.2
Connectors
J1 - External TA/EON1TA switch
1: TTL input with 10k pull-up
2: Ground
J2 - External Program switch
1: TTL input with 10k pull-up
2: Ground
J3 - Expansion IIC bus
1: SDA (Serial Data)
2: SCL (Serial Clock)
3: Ground
4: +5 V
J4 - RS-232 Interface
9pin D-SUB male (DTE) connector:
1: Not used / +5 V
2: Receive Data (RDS encoder)
3: Transmit Data (RDS encoder)
4: Connected to pin 6
5: Ground
6: Connected to pin 4
7: Connected to pin 8
8: Connected to pin 7
9: Not used
POWER - Power supply connector (2.1 mm)
Central pin is positive (+)
J5 - Output
J6 - Pilot or MPX input
4.3
Adjustable Elements
JP1 - Analogue part power supply jumper
1-2: +5 V internally stabilized (default)
2-3: Full power supply voltage
JP2 - MPX loopthrough jumper
short: on
open: off
JP3 - +5 V power supply for external device on pin 1 of
the RS-232 connector
short: on
open: off
TR1 - Output RDS signal level adjust
TR2 - 19 kHz free running oscillator adjust (section 5.4.3)
Note: The TR2 is not to be adjustable by the user.
4.4
LED Indicators
LED1 - Operation / Receive data / Error
LED2 - Pilot tone indication / Firmware update
BT - Lithium battery 3 V for real time backup
Estimated endurance is 10 years. Replace by CR2032 type.
Note: EEPROM memory that is used for RDS data storage does not require any voltage to hold the data.
7
5
Installation and Setting-up
5.1
Connection
Basic rules:
The RDS signal must be fed into modulation signal (added to MPX signal if stereo encoder is used).
If stereo encoder is used, one of its outputs (MPX or pilot tone) must be fed into the RDS encoder input to meet
the synchronization requirement.
Following figures show various situations and corresponding methods of connection:
Separate stereo encoder - default connection.
Stereo encoder with only one MPX output provided.
FM transmitter with only one MPX input provided.
8
Both stereo encoder and FM transmitter with only one MPX connector provided - loopthrough mode.
It is recommended not to use this mode if any of the other connections are possible.
FM transmitter with integrated stereo encoder.
In case of mono transmission (no stereo encoder used) the RDS encoder input may be left unconnected (since there is
no need of external synchronization) or it may be used for the audio signal injection in the case that the FM
transmitter has only one input connector.
5.2
5.2.1
Jumper Settings
JP1 - Analogue part power supply
The jumper position depends on characteristics of the signal that is fed in the RDS encoder input.
Do not change the jumper position if the unit is powered! Disconnect the power supply first!
RDS Encoder Input
Conditions
JP1 position
Not used
-
1-2
Pilot tone
MPX signal
5.2.2
-
1-2
Signal level ≤ 3.3 Vpp
1-2
Signal level > 3.3 Vpp
2-3
JP2 - MPX loopthrough
Connect (short) the jumper only if you want to pass the input signal to the output of the RDS encoder (loopthrough
mode). In all other cases the JP2 must be open (turned off, no jumper present)!
9
5.3
Power Supply
The RDS encoder can be supplied from any power supply, which delivers a voltage between 8 and 15 V DC and a
current of at least 200 mA. The RDS encoder has polarity protection and own voltage stabilizer. The central
conductor of the power supply connector is positive (+).
The JP1 jumper affects the analogue part supply voltage. The higher supply voltage the higher MPX signal level can
be processed. Stabilized power supply and care about right polarity is required if the JP1 is set to 2-3.
Note: After first power-up the RDS encoder will start to generate the RDS signal with factory default values
(PS: * RDS *, PI: FFFF). There is no need to configure anything to turn on the RDS subcarrier.
When attempting to set-up a unit that was already placed in operation before, the user should apply the
initialization first (chapter 12.2 or Windows control software help).
5.4
Level and Phase Adjustment
5.4.1
RDS signal output level
Note: There is no universal setting for the RDS level. Due to different input sensitivity of different FM broadcast
equipment it's preferred always to check and adjust the RDS level.
The right level should be between 2 and 11 % of the audio multiplex signal, measured in peak-to-peak values.
Recommended value is about 4 to 5 %, which results in 3.4 kHz deviation of the FM carrier. Don’t forget that the
maximum total FM carrier deviation with RDS and MPX signal is 75 kHz.
Adjusting higher RDS level results in better RDS reception in areas covered with weak signal. This is especially
important if using scrolling PS or sending a lot of text information. However consider following aspects before
adjusting higher RDS level:
the MPX (audio) level must be decreased a little to meet the overall FM deviation limit,
automatic tuning using alternative frequencies (AF) will appear slower – the receiver will rate the signal
reception as good although there may be a reason to tune to another frequency.
The deviation range of the FM carrier caused by RDS/RBDS is 1.0 to 7.5 kHz.
The deviation range of the FM carrier caused by stereo pilot tone is 6.0 to 7.5 kHz.
The overall peak frequency deviation shall not exceed 75 kHz.
10
5.4.2
Phase adjustment for stereo transmission
The phase adjustment is made using the Windows control software or using the PHASE= command. Make sure the
external synchronization is enabled (check the command EXTSYNC or the item Clock source on the System card in the
Windows control software which must be set to Auto).
1.
2.
Fetch pilot or MPX signal to the RDS encoder. The LED2 will indicate that the pilot tone is present.
Adjust right phase shift (0 or 90 degrees phase shift between 19 kHz pilot tone and 57 kHz RDS subcarrier,
measured on transmitter input, see the oscillograms). The phase adjustment would be difficult without an
oscilloscope or specialized measuring instrument. Never mind if you don't have this equipment. It’s also
possible to set very low RDS level (when the signal strength is near error limit) and set the minimal error rate by
adjusting the phase.
Some experiments performed in the field show that the conditions of RDS reception are not too much affected
by the phase criterion. However, similar experiments have shown that right phase shift adjust offers a better
behaviour of audio receivers, and notably the residues of audio intermodulation which can sometimes be
observed, but with the aid of professional instruments only.
Conclusion: The phase adjustment is only optional and you may skip this step. Make sure the pilot tone is
indicated on the RDS encoder by the LED2.
Oscillograms
Pilot and RDS in phase
(0 degrees phase shift)
Pilot and RDS in quadrature
(90 degrees phase shift)
Measuring conditions: Two-channel analogue oscilloscope, CH1: pilot (or MPX without audio), CH2: RDS
output, trigger source: CH1, vertical function: CH1+CH2, horizontal: 5 µs/div.
5.4.3
TR2 trimmer adjustment
Note: When you receive the RDS encoder, the TR2 trimmer is set to the correct position. The user is not allowed to
touch the TR2. This trimmer affects the sensitivity to the pilot tone only. It does not affect any other function!
Preferred way: Disconnect pilot/MPX signal and set 19 kHz on marked pin on the PCB without the pilot tone present
(tolerance is ±100 Hz, exact value has no effect on right functioning).
Alternative way: Connect pilot/MPX signal and set the TR2 trimmer to the position where the LED2 is lighting.
11
5.5
Setting Basic RDS Data
Before getting on-air with the RDS signal, you will need to decide on the settings to be used. The following RDS
services must be set as the first. Use the Windows control software and its GUI. For more experienced users or those
without a Windows PC, any terminal programme can be used (see chapter 11).
5.5.1
PI (Program Identification)
This is very important information that enables the receiver to distinguish between countries, areas in which the
same program is transmitted, and the identification of the program itself. The code is not intended for direct display
and is assigned to each individual radio program, to enable it to be distinguished from all other programs.
The PI code consists of four characters (hexadecimal numbers).
The first character identifies country:
0
Cannot be assigned.
8
PS, BG, LV, PT
1
DE, GR, MA, IE, MD
9
AL, DK, LI, LB, SI
2
DZ, CY, CZ, TR, EE
A
AT, GI, IS
3
AD, SM, PL, MK
B
HU, IQ, MC, HR
4
IL,CH, VA
C
MT, GB, LT
5
IT, JO, SK
D
DE, LY, YU
6
BE, FI, SY, UA
E
RO, ES, SE
7
RU, LU, TN, NL
F
EG, FR, NO, BY, BA
The second character identifies program type in terms of area coverage:
0
Local
1
International
2
National
3
Supra-regional
4 to F
Regional
Local program transmitted via a single transmitter only during the
whole transmitting time.
The same program is also transmitted in other countries.
The same program is transmitted throughout the country.
The same program is transmitted throughout a large part of the
country.
The program is available only in one location or region over one or
more frequencies, and there exists no definition of its frontiers.
The third and fourth characters are used to clearly identify different stations within the area of coverage.
Important note: Meaning of some PI digits may be different for US RBDS.
Important note: If the station has only one transmitter, second PI digit must be zero (x0xx).
Important note: Factory default PI value is FFFF and it's needed to change it as soon as possible to avoid the
situation that two different stations with common area of coverage have the same PI. For each station in the same
location the unique PI must be assigned. Stations that carry different program must be unambiguously identified by
the last two PI digits. In other case they are recognized as one station by car radios, regardless of any other service
settings. If the broadcaster hasn't received the 4-digit PI from regulatory office, he must choose such number that is
not in conflict with other stations in the location.
Tip: The Magic RDS control software includes a wizard that calculates the PI automatically.
12
5.5.2
PS (Program Service name)
The PS name is max. 8 character long radio station name that will be shown most of the time on the radio display.
Advanced use of the PS (Dynamic/Scrolling PS) is discussed later.
5.5.3
PTY (Program Type)
The PTY code defines the type of the programme broadcast within 31 possibilities. See chapter 12.2 for a complete
list. This code could be used for search tuning.
Important note: PTY number 1 (News) should never be left on all the time. Use PTY number 3 (Info) for this purpose.
5.5.4
TP (Traffic Program)
This is a flag to indicate that the tuned program carries traffic announcements. The TP flag should only be set on
programs which dynamically switch on the TA identification during traffic announcements. The flag shall be taken
into account during automatic search tuning.
5.5.5
MS (Music/Speech)
This is a two-state signal to provide information on whether music or speech is being broadcast. The signal would
permit receivers to be equipped with two separate volume controls, one for music and one for speech, so that the
listener could adjust the balance between them to suit his individual listening habits.
5.5.6
AF (Alternative Frequencies)
The Alternative Frequencies are used to tell receivers what frequencies they can receive the radio station on. This
facility is particularly useful in the case of car and portable radios. For this to work, each transmitter must have RDS
with the same PI code.
Important note: If second PI digit is set to zero (x0xx), this indicates that the station has only one transmitter and
the AF list is ignored on most receivers.
For complete RDS service description visit the website, section Support.
13
5.5.7
Windows control software - First steps
1.
In the case of USB connection install the USB driver first. Pure RS232 connection requires no driver.
2.
Make sure the RDS encoder is connected and powered, all connectors are seated completely and where
possible, use screws to fix the connection.
3.
Open the Preferences (Options - Preferences) and set up the connection parameters. If the RDS encoder is
connected via USB and was recognized correctly in Windows, you may find/change the COM port number in
Windows Control Panels - System - Hardware - Device Manager.
4.
Close the Preferences. You should see "Connected" or "Opened" in the status bar. Now you are ready. The
settings are saved automatically.
5.
Configure the basic RDS settings mentioned above. You will find them on cards Program and System. Then
click Store. For beginners there’s a very useful configuration wizard under menu item Help.
6.
The status bar at the bottom of the window shows whether the data was sent successfully. If Communication
Error! is shown, check the connection to the RDS encoder, its power supply and that the correct COM port is
selected in the Preferences dialogue box.
7.
Follow the instructions in the application Help.
Main menu
Tool bar
Dynamic PS 1 text
RT+ indicator
Radiotext 1
Default PS
Status bar
Configuration
wizard
Magic RDS 3 - default Windows control software.
Note: The RDS encoder contains two types of memory. These are marked as RAM and EEPROM. Like any other
computing system the RAM holds all operational data which are also used for transmission whilst the EEPROM is
used for the data storage during power-off. By default the button Send will fill the RAM only. The button Store will
fill the RAM and also stores the data into EEPROM. The Store button behavior can be changed in Options Preferences - Buttons.
If the user forgets to store the data into EEPROM, the settings will be lost when the power is disconnected.
14
6
Dynamic PS Text
Standard RDS enabled receiver disposes of 8-character LCD display but we usually need to show pile of information
and commercials. So small display on the one hand and so much demands on the other hand. The PIRA32 solves it
by unique system of text messages showing. Although Radiotext service is defined in the RDS standard, this service
is not present some receivers (especially older car radios) and has some other limitations. According to the
broadcasters needs, the PS service - one of the basic RDS services supported by all receivers - can be usually used to
give sequential information. This has become known as ‘Dynamic PS’ or ‘Scrolling PS’.
Note: Using the dynamic PS is restricted in some countries and it's fully prohibited by the RDS standard!
The manufacturer is not responsible for incompetent use of this feature. Some receivers may not display the dynamic
PS properly for reasons that lie entirely on their side. Never provide traffic information inside the Dynamic PS text!
The PIRA32 RDS encoder offers advanced implementation of the Dynamic PS service. Basic text message length is up
to 255 characters (mode independent). Two varieties of the Dynamic PS are present: Dynamic PS 1 (DPS1) and
Dynamic PS 2 (DPS2). Both varieties are configurable independently from each other.
Basic configurable parameters are:
Text content/text source
Display mode
Label period or scrolling speed
Number of transmissions
Example of full dynamic PS use:
The number of transmissions is specified for each Dynamic PS text. The Static PS period (delay between text loops)
specifies the time between two repeats of the Dynamic PS text loops. Default PS is displayed during this time.
Four display modes are provided. The mode is switchable ‘on the fly’, without need to re-enter the text message.
Mode 0 - Scrolling by 8 characters
Mode 1 - Scrolling by 1 character
Mode 2 - Word alignment scrolling
Mode 3 - Scrolling by 1 character, text separated by spaces at begin and end
Additional differences exist between Dynamic PS 1 and Dynamic PS 2 (see sections 12.2 and 12.9). In general the
DPS1 should be used if on-line connection is available between your studio and the RDS encoder while the DPS2
should be used if the RDS encoder is placed on a site without on-line connection providing set of fixed messages.
15
7
Alternative Frequencies
The list of alternative frequencies gives information on the various transmitters broadcasting the same program in
the same or adjacent reception areas. It allows switching to another frequency of the same station when leaving the
actual frequency coverage. This facility is particularly useful in the case of car and portable radios.
Important note: If second PI digit is set to zero (x0xx), this indicates that the station has only one transmitter and
the AF list is ignored on most receivers.
Ideally the AF list should only comprise frequencies of neighboring transmitters or repeaters. Entire AF set should be
as tiny as possible to allow the receiver to find the strongest frequency quickly. This will improve the listener's
experience. Thus there should be more RDS encoders using individual AF sets within larger networks.
Two methods of transmitting AFs are possible:
• AF method A is used for stations carrying the same program on all their transmitters. The list may contain up to
25 frequencies.
• AF method B is used for larger lists or when splitting areas or different programs are broadcast.
94.3 MHz
95.8 MHz
91.2 MHz
7.1
Method A
This is a default method recommended for most of stations.
To establish a common list of AF-A using a terminal:
Note: Requires only one RDS encoder for entire network (common STL or one main transmitter and two
repeaters). The list must contain all frequencies on which the signal from the RDS encoder is carried.
AF=94.3,95.8,91.2
*AF
Enter the list
Store the list
To establish a separate list of AF-A for each transmitter:
Note: Requires separate RDS encoder for each transmitter.
Note: All RDS encoders must be using the same PI (Program Identification).
91.2 MHz:
AF=94.3
*AF
Enter the list
Store the list
94.3 MHz:
AF=95.8,91.2
*AF
Enter the list
Store the list
95.8 MHz:
AF=94.3
*AF
Enter the list
Store the list
16
7.2
Method B
Total capacity: up to 8 lists, up to 12 AF pairs each
Method B AF coding is a more complex method that is used where the number of AFs used by a transmitter and its
associated repeater stations exceed 25, or where it is required to indicate frequencies which belong to different
regions which at times carry different programs.
More than one transmitter or associated repeaters of the station broadcast the same set of different AF lists in
sequence. Total number of AF lists used within entire network is in general identical to the number of transmitters
and repeater stations in the network so as to provide a unique list for each transmitting station. In this method the
alternative frequencies are individually addressed by transmitting the tuning frequency paired with one alternative
frequency. Each list starts with the tuning frequency for which the list is valid, e.g. 94.3. All remaining pairs (up to
12) give the tuning frequency together with a valid AF.
For the transmission of the frequency pairs within one block the following convention is used. They are generally
transmitted in ascending order (F1 < F2), e.g. 94.3,95.8 or 91.2,94.3. In special cases they are transmitted in
descending order, if they belong to different regions, or carry from time to time different programs. If you use the
Windows control software, this assures right order automatically.
To establish a common set of AF-B lists using a terminal:
Note: For illustration purpose only. If the network contains only a few frequencies like in this example, the
method A is more effective.
AF=A
AF=94.3,94.3,95.8,91.2,94.3
*AF=1
AF=95.8,94.3,95.8
*AF=2
AF=91.2,91.2,94.3
*AF=3
AF=
*AF=4
AF=B
*AF
Switch to method A to allow editing of the AF lists
Enter the first list for 94.3 MHz
Store the list
Enter the second list for 95.8 MHz
Store the list
Enter the third list for 91.2 MHz
Store the list
Terminate the set of AF lists
Store the termination
Switch back to method B – start cycling through the lists
Store the method setting
To read the set of AF-B lists:
AF
AF=A
AF=1
AF
AF=2
AF
AF=3
AF
AF=4
AF
AF=B
Read the AF method being used (A/B)
Switch to method A to allow reading of the AF lists
Load the first list
Read the list
Load the second list
Read the list
Load the third list
Read the list
Load the fourth list
Read the list, no AF here, terminating
Switch back to method B
Notes:
If the number of AFs of a station is larger than 12, the list must be split into two or more lists. These lists are
transmitted directly one after the other.
Broadcasters using splitting of a network during certain hours of the day should use AF method B, and not AF
method A. The lists should be static, i.e. the AFs included in the list, carrying a different program during certain
hours of the day, shall be signaled by transmitting in the descending order (F1 > F2). Their PI shall differ in the
second digit of the code (using regional variant 4 to F) and may also be static. Switching the second digit of the PI to
1, 2 or 3 informs the receiver that now even AFs transmitted in descending order carry the same program and the
receiver may use them for switching.
17
8
Enhanced Other Networks information (EON) control
The EON feature is used to update the information stored in a receiver about program services other than the one
received. Alternative frequencies, the PS name, Traffic Program and Traffic Announcement identification as well as
Program Type and Program Item Number information can be transmitted for each other service. The relation to the
corresponding program is established by means of the relevant Program Identification (PI).
The EON is especially useful for linking two or more stations of the same owner. Most of EON featured receivers
gives priority to stations linked by EON when seek function is activated. Since the PIRA32 can store four EON links,
up to 5 stations can be linked together.
Station that doesn’t carry traffic announcements can refer to a station that does. This situation is described below. For
more information see appropriate section in the List of Commands or in the Magic RDS control software help.
8.1.1
Traffic Program and Traffic Announcement codes
The coding to be used is as follows:
Traffic Program
(TP)
Traffic Announcement
(TA)
0
0
0
1
1
0
1
1
Applications
This program does not carry traffic announcements nor does it
refer, via EON, to a program that does.
This program carries EON information about another program
that gives traffic information.
This program carries traffic announcements but none are being
broadcast at present and may also carry EON information
about other traffic announcements.
A traffic announcement is being broadcast on this program at
present.
Station which uses the code TP=0, TA=1 must refer to at least one program service which carries traffic information,
and has the flag TP=1. When a particular program service begins a traffic announcement, the station that crossreferences this service via the EON feature will broadcast a switch signal by setting the appropriate EON TA flag to 1.
The EON TA flags can be controlled by software for all four EON links in the PIRA32. The first EON link TA flag can
be also controlled by external TA/EON1TA switch.
The situation described is illustrated on the example below:
8.1.2
Example
Kiss FM is a small station that doesn’t carry traffic announcements but refers via EON to City Radio, which is
regional station of the same owner that carries the traffic announcements. If the Kiss FM listener has activated the
EON feature on his receiver, he will be automatically tuned to City Radio for the duration of traffic announcements.
Station 1: Kiss FM
Station 2: City Radio
PI=20F1
PS=KISS FM
TP=0, TA=1
Frequency: 90.2 MHz
PI=2501
PS=CITY
TP=1, TA=(controlled by external switch)
Frequencies: 93.7 and 106.2 MHz
(only 93.7 can be received in the area covered by Kiss FM)
Station 1 EON Data:
EON1PI=2501
EON1PS=CITY
EON1TA=(controlled by external switch)
EON1AF=93.7
Both TA/EON1TA switch connectors can be wired together and controlled by only one switch or device if the
transmitters of 90.2 and 93.7 MHz are placed on the same site.
18
9
Weekly Scheduling
This feature allows scheduling of text messages, program type names and any other commands in hourly, daily and
weekly program. The scheduling is provided directly by the PIRA32 unit. Once set, it works with no more support
from PC or control application. This is especially useful when the RDS encoder is placed on remote site or where
reliability is important.
9.1.1
9.1.2
Key features
The scheduling feature is fully implemented in the PIRA32 unit and works independently
Almost any RDS service or control command can be scheduled
Up to 48 scheduling items
Each item may contain any combination of days in week, up to 12 times (a wildcard is supported on the hour
place), program type (PTY) information and any from more than 60 commands
First steps
Let’s say that our radio station called ‘PRO 88’ broadcasts news from Monday to Friday at midday. The news
duration is 40 minutes. During the news the PS is set to ‘HOT NEWS’ and the PTY is set to 1 (News). In common
program the PTY is set to 3 (Info).
Scheduling item 01:
Days: Monday, Tuesday, Wednesday, Thursday, Friday
Times: 12:00
PTY: 1 (News)
Command: PS=HOT NEWS
Scheduling item 02:
Days: Monday, Tuesday, Wednesday, Thursday, Friday
Times: 12:40
PTY: 3 (Info)
Command: PS=PRO 88
9.1.3
Text messages scheduling
Although it’s possible to change directly the Dynamic PS and Radiotext (using an appropriate command, for example
RT2=The best music in the city), the maximum text length is limited since maximum command length in
each Scheduling item is 35 characters. For longer texts you may use indirect method based on the bank of Messages:
1.
Store the text as a Message, for example Message 01.
2.
In the Scheduling call the message number, for example RT2MSG=1 or DPS2MSG=1.
The Windows control application provides easy GUI for this case.
9.1.4
Troubleshooting
If the scheduling doesn’t work as expected, check the following points:
Scheduling enabled?
Date and Time actual?
Commands typed right?
19
10 Broadcast Automation System Link-up
To send dynamic data via the RDS it's very useful to link the RDS encoder with your broadcast automation system.
This usually results in a possibility of sending commercials, actual song information, program announcements and
more. Almost any broadcast system can be linked with the PIRA32. The link may be either indirect or direct.
10.1 Indirect Link
Default Windows control software for the PIRA32 RDS encoder is the Magic RDS 3. This application including
documentation and examples of use can be downloaded from the Website, section Software.
Since probably hundreds of automation systems are used around the world and new versions are released often,
information in this manual cannot be full-scale. For more information about how to configure the broadcast
automation system text output read its documentation or contact the vendor.
10.2 Direct Link
10.2.1 Recommended procedure step-by-step
1.
2.
3.
4.
For the present turn off the RDS encoder support in the broadcast automation system.
Connect the RDS encoder and configure all basic parameters like PI, default PS, text setup, individual text
features enable settings etc. using the Windows control software or terminal application and command line.
Store all setting into EEPROM. Exit the Windows control software or the terminal.
Find out the baudrate (speed) that is used by the broadcast automation system for communicating with the RDS
encoder. If this parameter is not clear from the documentation and no baudrate control is provided in the
broadcast automation system, configure the RDS encoder for the default value (2400 bps).
Turn on the RDS encoder support in the broadcast automation system.
Important note: By default only one software application can access one communication port at the same time!
For more information about how to control the RDS encoder contact the broadcast automation system vendor.
10.2.2 Compatibility commands
To reach the best possible compatibility with broadcast automation systems, the PIRA32 includes a special set of
compatibility commands. In the systems where the PIRA32 is not directly supported (or the system is older version)
the user may try to select another RDS encoder model to send text messages. Where possible, set the communication
as unidirectional. The most frequent communication speed in this case is 9600 bps.
Command
Translated to
TEXT=
RT1=
DPS=
DPS1=
PS_SCROLL=
DPS1ENQ=
Moreover the RDS encoder includes UECP support (see chapter 14).
20
10.2.3 Radiotext Plus (RT+)
The RT+ feature is designed to let the listener take additional benefit from the Radiotext service by enabling receivers
to offer direct access to specific elements of Radiotext. Typically the RT+ feature supports song artist and song title
elements. These elements anyway carried in the Radiotext, are identified by their class type, length and location
within the Radiotext. The receiver must be equipped with the RT+ function (also called "tagging") to take advantage
of this feature.
The RDS encoder includes full support for the RT+ and its handling is highly automated. For direct use your
broadcast automation system must support the RT+ function either by means of user defined groups or by the
command RTP= (see section 12.7 for more details). In other cases the Windows control software used in the indirect
link configuration can provide the RT+ service.
10.2.4 No header communication
By default, entering a text into the RDS encoder requires appropriate command header, for example:
RT1=Now playing: Junior Jack – My Feeling
Some broadcast automation systems provide direct serial text output (song info, commercials) without ability to add
the RT1= or DPS1= prefix (typically satellite-streamed text feeds). For this case the RDS encoder provides special no
header communication option enabling direct connection. When this option is active, any text incoming through the
serial interface (including any control commands!) and followed by <Enter> will be automatically parsed and will
appear as Radiotext 1, Dynamic PS 1 or both. Control of other RDS services is not allowed until deactivating the no
header option.
To activate the no header communication:
1. Configure all RDS services as desired.
2. Enter the command *NOHDR=1.
3. The no header communication is indicated by front panel LED (see chapter 13).
To deactivate the no header communication, press the keyboard <Escape> key three times and then press <Enter>.
The RDS encoder will respond by ‘+’ indicating that it is back in standard communication mode.
Configuration
EQTEXT1=0
DPS1EN=1
EQTEXT1=1
RT1EN=1
DPS1EN=0
EQTEXT1=1
RT1EN=1
DPS1EN=1
Text appears in
Dynamic PS
Radiotext
Both Radiotext and Dynamic PS
Notes:
1. The ESC key scan code is 27 (0x1B).
2. It is not allowed to enter the no header communication if the RDS encoder addressing feature is in use. Thus the
RDS encoder address must be either 0 or 255.
3. If the no header communication is active, the unit does not accept UECP commands although the UECP is
enabled.
4. If the no header communication is active, the unit does not confirm the text entered.
21
11 COM Port Communication
11.1 Connecting the RDS Encoder to a PC
For configuration and control requirements a PC is connected to the RDS encoder via standard RS-232 interface
provided by D-SUB9 male connector (DTE) on the RDS encoder side. On the PC side locate an unused COM port. If
the free port exists in the form of a 25-pin connector, use a standard D-SUB9 (male) to D-SUB25 (female) adapter. For
USB or Ethernet connection appropriate commercially available adapter will apply.
It’s preferable to use standard crossed serial “lap-link” cable also called as “null-modem cable” with two female
connectors for the connection. Following table represents the full connection diagram. In most cases (no flow control)
the three highlighted wires are enough for the connection.
RDS Encoder
2 (RxD)
3 (TxD)
4 (DTR)
5 (GND)
6 (DSR)
7 (RTS)
8 (CTS)
PC
3 (TxD)
2 (RxD)
6 (DSR)
5 (GND)
4 (DTR)
8 (CTS)
7 (RTS)
11.2 Working with a Terminal Application
On the PC, run an application or program emulating or possessing an ASCII terminal. For example Windows
HyperTerminal presents all the characteristics to easily communicate in ASCII mode with the RDS encoder. If you
desire a higher level interface, user-friendly applications are available. The PIRA32 basic control is also implemented
in familiar broadcast automation systems. Please refer to the web site for more information.
If you wish to continue with the terminal application, configure the communication parameters as follows:
Transmission speed
Data bits
Parity
Stop bits
Flow control
Parity checking
Carrier detection
2400 bps (default, see note)
8
None
1
None
No
No
Note: Generally any speed of 1200, 2400, 4800, 9600 or 19200 bps is possible if previously set and stored in the RDS
encoder EEPROM memory.
Once configured, the terminal can be used. To check if the hardware and logic configuration work as planned, type
for example HELP and press <Enter> to display the list of all commands. If no or unknown characters are displayed
on the screen, try again a second time, otherwise, check the following points:
RDS encoder turned on?
Cable used (does the LED1 indicate incoming characters?)
Configuration of the terminal application
To display the commands entered at the keyboard on the screen, type the command ECHO=1 followed by <Enter>. If
all characters written are displayed twice, type ECHO=0 and press <Enter>.
To store this parameter into EEPROM memory, type *ECHO and press <Enter>.
To display actual parameter value, type ECHO and press <Enter>.
Now you made first steps with the RDS encoder command interpreter. Take a note that entirely all functions and
settings of this RDS encoder can be controlled via the terminal making this device fully independent on the operating
system or computing platform.
22
11.3 Command Interpreter
The RDS encoder command interpreter meets the following rules:
Any instruction sent to the RDS encoder must be validated by <Enter>.
Before validating you may correct the characters by pressing <Backspace>.
There are several methods of use for the commands:
Query or command without argument, ex. HELP
Shows the parameter value or performs the operation.
Command with argument, ex. ECHO=1
Assigns the value to the parameter.
Memory store command, ex. *ALL
Stores the parameter value(s) into the non-volatile EEPROM memory.
Memory store command with argument, ex. *MSG01=
Assigns the value to the parameter and stores it immediately into the non-volatile EEPROM memory.
Not all methods are available for all commands, see Command Summary section.
Depending on the command processing success, several characters (followed by two pairs of carriage return and line
feed characters) can be returned by the RDS encoder:
+
!
/
Command processed successfully
Unknown command
Invalid argument
Command processed partially
The command interpreter is not case sensitive. But it’s recommended to write all commands in UPPER CASE to
maintain backward compatibility with older firmware versions.
If you wish to retain change of any parameter value during power off, don’t forget to store it into EEPROM memory!
Windows Hyperterminal control.
23
11.4 Additional Information
This additional information provides all details required for implementation of the PIRA32 protocol into your
application (broadcast automation system, messaging system, TMC data source etc.).
Please see also the Annex 1 - Communication Protocol Implementation Flowcharts. Some source code examples are
provided on the website.
11.4.1 Unidirectional or bidirectional – What is the difference?
The PIRA32 supports both unidirectional and bidirectional communication modes. Nothing is required to be set, the
mode of operation results only from the method of communication.
Unidirectional
(backward channel from the RDS encoder is not
present or the data from this channel is ignored)
Very simple to implement
Low cost data link
No direct feedback from the unit
Bidirectional
(both channels are used)
Reliable remote control
Backward channel may be hard to realize in some cases
Unsuitable for larger networks
11.4.2 Command synchronization
Unidirectional communication:
If sending more commands in sequence, the execution times must be taken into consideration. In other case some
commands may be discarded after internal buffer filling (the RX buffer length is 48 bytes).
Command
Execution time
PS=, TPS=, DPSx=
up to 400 ms
G=
up to 200 ms
*ALL
200 ms
*EON, *DPSx, *MSGxx=
50 ms
Other store commands, SEN=
All other commands
10 ms
0 ms (typ.)
The times result from the EEPROM write cycle duration or from the requirement of internal synchronization with
RDS data group order. Most of commands require no perceptible delay due to internal RX line buffering.
TX
P S = P R O 8 8 ←
(execution time)
Legend:
TX – data sent to the RDS encoder, ← - CR (char. 13, <Enter>)
(next command may follow)
24
Bidirectional communication:
Next command can be sent after receiving confirm sequence from previous command. This ensures right timing
and optimal channel usage in all cases. There is no need to consider any timing or delays.
TX
RX (ECHO=1)
RX (ECHO=0)
P S = P R O 8 8 ←
(next command may follow)
P S = P R O 8 8 (exec. time) ← ↓ + ← ↓ ← ↓
(exec. time) ← ↓ + ← ↓ ← ↓
TX
RX (ECHO=1)
RX (ECHO=0)
P S ←
(next command may follow)
P S ← ↓ P R O 8 8 ← ↓ + ← ↓ ← ↓
← ↓ P R O 8 8 ← ↓ + ← ↓ ← ↓
TX
RX (ECHO=1)
RX (ECHO=0)
* P S ←
(next command may follow)
* P S (exec. time) ← ↓ + ← ↓ ← ↓
(exec. time) ← ↓ + ← ↓ ← ↓
Legend:
TX – data sent to the RDS encoder, RX – data read from the RDS encoder, ← - CR (char. 13), ↓ - LF (char. 10)
11.4.3 Useful notes
ASCII char. 9 (TAB) is converted to char. 32 (space).
In addition to the <Enter> (char. 13, CR) used for command validating, character 26 (EOF) can be used. This
allows to insert the validating character on platforms where char. 13 (CR) is not accepted.
The command interpreter ignores other characters in ASCII range 0-31.
Space characters (char. 32) are ignored if typed behind validating character on a new line. In this case, the space
characters may be used to realize a delay between two commands.
The COM port time-out is 2 minutes. If no character is received during this time, the command line is internally
cleared.
25
12 List of Commands
12.1 Command Summary
Basic:
AF
AFCH
DI
DPS1
DPS2
DPS1MOD
DPS2MOD
DPS1REP
DPS2REP
DTTMOUT
EQTEXT1
LABPER
MS
PI
PS
PTY
PTYN
PTYNEN
RT1
RT1EN
RT2
RT2EN
RTPER
RTTYPE
RSTDPS
SCRLSPD
SPSPER
TA
TATMOUT
TP
TPS
INIT
AF=
AFCH=
DI=
DPS1=
DPS1ENQ=
DPS2=
DPS1MOD=
DPS2MOD=
DPS1REP=
DPS2REP=
DTTMOUT=
EQTEXT1=
LABPER=
MS=
PI=
PS=
PTY=
PTYN=
PTYNEN=
RT1=
RT1EN=
RT2=
RT2EN=
RTPER=
RTTYPE=
RSTDPS=
SCRLSPD=
SPSPER=
TA=
TATMOUT=
TP=
TPS=
*AF
*AFCH
*DI
*DPS1
*DPS2
*DPS1MOD
*DPS2MOD
*DPS1REP
*DPS2REP
*DTTMOUT
*EQTEXT1
*LABPER
*MS
*PI
*PS
*PTY
*PTYN
*PTYNEN
*RT1
*RT1EN
*RT2
*RT2EN
*RTPER
*RTTYPE
*RSTDPS
*SCRLSPD
*SPSPER
*TA
*TATMOUT
*TP
*TPS
*ALL
HELP
EON:
EONxAF
EONxAFCH
EONxEN
EONxPI
EONxPIN
EONxPS
EONxPTY
EONxTA
EONxTP
EONxAF=
EONxAFCH=
EONxEN=
EONxPI=
EONxPIN=
EONxPS=
EONxPTY=
EONxTA=
EONxTP=
*EON
*AF=
Alternative Frequencies
Alternative Frequency Channels
Decoder Identification
Dynamic PS 1
Dynamic PS 1 Enqueue
Dynamic PS 2
Dynamic PS 1 Mode
Dynamic PS 2 Mode
Dynamic PS 1 Number of Repeating
Dynamic PS 2 Number of Repeating
Default Text Timeout
Equal Text 1
Label Period
Music/Speech
Program Identification
Program Service name
Program Type number
Program Type Name
PTYN Enable
Radiotext 1
RT1 Enable
Radiotext 2
RT2 Enable
Radiotext Switching Period
Radiotext Type
Restart Dynamic PS
Scrolling PS Speed
Static PS Period
Traffic Announcement
TA Timeout
Traffic Program
Traffic PS
Initialization
Store All
Help
EON x Frequencies
EON x Frequency channels
EON x Enable
EON x Program Identification
EON x Program Item Number
EON x Program Service name
EON x Program Type number
EON x Traffic Announcement
EON x Traffic Program
Store all EON data into EEPROM
x is in range 1-4
Note: Almost all commands have their equivalent in the Windows control software, accessible through its GUI.
26
Messages:
MSGxx
MSGxxD
MSGLIST
DPS2MSG
DPS2MSG=
RT2MSG
RT2MSG=
xx is in decimal range 01-99
Scheduling:
S
SxxC
SxxD
SxxP
SxxT
SEN
SEN=
xx is in decimal range 01-48
System:
COMSPD
CT
ECHO
EXTSYNC
LEVEL
LTO
MJD
PHASE
PILOT
RDSGEN
RESET
SPEED
STATUS
TIME
VER
Advanced:
ADR
CC
ECC
ECCEN
GRPSEQ
LIC
NOHDR
PIN
PINEN
PROGRAM
PSW
RTP
RTPRUN
*MSGxx=
*MSGxxD=
*DPS2MSG
*RT2MSG
*SxxC=
*SxxD=
*SxxP=
*SxxT=
*SEN
COMSPD=
CT=
DATE=
ECHO=
EXTSYNC=
LEVEL=
LTO=
MJD=
PHASE=
*COMSPD
*CT
*DATE
*ECHO
*EXTSYNC
*LEVEL
*LTO
*MDJ
*PHASE
RDSGEN=
*RDSGEN
SPEED=
*SPEED
TIME=
*TIME
*GRPSEQ
*LIC
PIN=
PINEN=
PROGRAM=
*PIN
*PINEN
*PROGRAM
*ECC
*ECCEN
*NOHDR=
RTP=
RTPRUN=
SEL=
SHORTRT=
List of Scheduling Items
Scheduling Item Command
Scheduling Item Days
Scheduling Item PTY
Scheduling Item Times
Scheduling Enable
COM Port Speed
Clock Time and Date
Date
Terminal Echo
External Pilot Synchronization
RDS Signal Level
Local Time Offset
Modified Julian Day
RDS Signal Phase
Pilot Tone Present
RDS Generator
Reset
COM Port Speed
RDS Encoder Status
Time
Firmware Version
*ADR=
*CC=
ECC=
ECCEN=
G=
GRPSEQ=
LIC=
Text Message
Message Destination
List of Messages
Dynamic PS 2 Message Number
Radiotext 2 Message Number
SHORTRT
*SHORTRT
SITE
*SITE=
UDG1
UDG1=
*UDG1
UDG2
UDG2=
*UDG2
UECP
UECP=
*UECP
>xxxxxxx
xxxxxxx is any command from the second column without ‘=’
Encoder Address
Conditional Command
Extended Country Code
ECC and LIC Enable
Group
Group Sequence
Language Identification Code
No Header Communication
Program Item Number
PIN Enable
Program Set
PS Window
Radiotext Plus Tagging Data
Radiotext Plus Running Bit
Select Encoder
Short Radiotext
Site Address
User Defined Groups 1
User Defined Groups 2
UECP Enable
Assign Last Value
27
12.2 Basic Commands
AF
Alternative Frequencies
(87.6-107.9), A, B, (1-8)
Actual list of alternative frequencies in MHz representation in range of 87.6-107.9 MHz. Up to 25 items are
allowed in the list.
In addition this command switches between AF method A and B and allows working with different AF lists
for the method B.
For more details about the method B follow the section 7. From factory the AF method is set to A.
AF=103.5,98.0 Sets the alternative frequencies to 103.5 and 98.0 MHz (method A)
Shows actual AF list. Returns "B" if method B is active.
AF
Stores the AF list into EEPROM (default space for method A)
*AF
Stores the AF list into EEPROM (to a space used by method B)
*AF=1
Not allowed (87.5 MHz not defined by RDS standard)
AF=87.5
Not allowed (108.0 MHz not defined by RDS standard)
AF=108.0
AFCH
Alternative Frequency Channels
H (01-CC)
Actual list of alternative frequency channels in hexadecimal representation in range of 01-CC (87.6-107.9
MHz). Up to 25 items are allowed in the list.
AFCH=01,3B
Sets the alternative frequencies to 87.6 and 93.4 MHz
Not allowed (87.5 MHz not defined by RDS standard)
AFCH=00
Not allowed (108.0 MHz not defined by RDS standard)
AFCH=CD
DI
Decoder Identification
(0-15)
Identification of the decoder to be used by the receiver.
DI=1
Standard transmission - stereo.
Standard transmission - automatic stereo/mono set depending on pilot tone presence.
DI=0
DPS1
Dynamic PS 1
Up to 255 characters long text message to be displayed on receiver instead of static PS name. Primarily used
for song titles streaming etc.
DPS1=Hello World Sets the DPS1 text
Clears the DPS1
DPS1=
DPS1ENQ
Dynamic PS 1 Enqueue
Advanced version of the DPS1 command. Places the text to a one level deep queue. New text will not be
displayed on the receiver until old text reaches its end. Applies only to text length <128 characters.
DPS1ENQ=Hello World Sets the following DPS1 text
DPS2
Dynamic PS 2
Up to 255 characters long text message to be displayed on receiver instead of static PS name. Alternatively
used in conjunction with Messages Commands.
DPS2=Hello World Sets the DPS2 text
Clears the DPS2
DPS2=
DPS1MOD
Dynamic PS 1 Mode
Display mode for the DPS1 text.
0 - Scrolling by 8 characters
1 - Scrolling by 1 character
2 - Word alignment scrolling
3 - Scrolling by 1 character, text separated by spaces at begin and end
DPS1MOD=3
(0-3)
28
DPS2MOD
Dynamic PS 2 Mode
Display mode for the DPS2 text.
0 - Scrolling by 8 characters
1 - Scrolling by 1 character
2 - Word alignment scrolling
3 - Scrolling by 1 character, text separated by spaces at begin and end
(0-3)
DPS2MOD=3
DPS1REP
Dynamic PS 1 Number of Repeating
(0-127)[,CLR]
Specifies number of repeating for the DPS1 text message. Optionally the DPS1 text is then cleared.
Without the optional CLR parameter specified the command has effect only if DPS2 is set.
Number of repeating = number of transmissions - 1.
DPS1REP=1
DPS1REP=2,CLR
DPS2REP
Dynamic PS 2 Number of Repeating
(0-255)
Specifies number of repeating for the DPS2 text message. Has effect only if DPS1 is set or if DPS2MSG value is
AUTO.
Number of repeating = number of transmissions - 1.
DPS2REP=0
DTTMOUT
Default Text Timeout
(0-254)
Specifies a timeout in minutes for Radiotext 1. If no RT1 has been received during the period, the RT1 text is
replaced by default text. If RT+ service is active, the RT+ running bit is cleared.
Default text means the RT1 text that is stored in EEPROM memory using *RT1.
1-254 – Timeout in minutes.
0 – Function disabled.
DTTMOUT=10
EQTEXT1
Equal Text 1
If set to 1, any update of RT1 updates also DPS1 and vice versa. Does not apply to UECP control.
(0, 1)
EQTEXT1=1
DPS1=Hello World
RT1
LABPER
Label Period
(0-255)
Label Period used in DPS Mode 0 and 2. Increasing the value by 1 increases the period by approx. 0.54
seconds (exact value depends on Group Sequence).
LABPER=4
Each label is displayed for about 2 seconds.
MS
Music/Speech
Music/Speech switch.
MS=0
Speech program
Music program
MS=1
PI
Program Identification
Identification code of the radio station. Always contains four hexadecimal digits.
PI=20FE
OK
Not allowed (0 as first digit)
PI=0F55
(0, 1)
H (1000-FFFF)
PS
Program Service name
Static name of radio station that is displayed on receiver. Max. 8 characters long.
The PS= command requires additional processing time of up to 400 ms for internal synchronization with RDS
group order.
PS=KISS FM
29
PTY
Program Type number
(0-31)
An identification number to be transmitted with each program item, intended to specify the current Program
Type within 31 possibilities.
Program type codes (Europe):
0 - (none)
1 - News
2 - Affairs
3 - Info
4 - Sport
5 - Education
6 - Drama
7 - Cultures
8 - Science
9 - Varied Speech
10 - Pop Music
11 - Rock Music
12 - Easy Music
13 - Light Classics Music
14 - Serious Classics
15 - Other Music
16 - Weather
17 - Finance
18 - Children
19 - Social Affairs
20 - Religion
21 - Phone In
22 - Travel
23 - Leisure
24 - Jazz Music
25 - Country Music
26 - National Music
27 - Oldies Music
28 - Folk Music
29 - Documentary
30 - Alarm Test
31 - Alarm
Program type codes (US RBDS):
0 - (none)
16 - Rhythm and Blues
1 - News
17 - Soft Rhythm and Blues
2 - Information
18 - Foreign Language
3 - Sports
19 - Religious Music
4 - Talk
20 - Religious Talk
5 - Rock
21 - Personality
6 - Classic Rock
22 - Public
7 - Adult Hits
23 - Leisure
8 - Soft Rock
24 - College
9 - Top 40
25 - (unassigned)
10 - Country
26 - (unassigned)
11 - Oldies
27 - (unassigned)
12 - Soft
28 - (unassigned)
13 - Nostalgia
29 - Weather
14 - Jazz
30 - Emergency Test
15 - Classical
31 - Emergency
PTY=10
Sets the Pop Music Program Type (EU)
PTYN
Program Type Name
Allows further description of the current Program Type, for example, when using the PTY code 4: SPORT, a
PTYN of "Football" may be indicated to give more detail about that program.
PTYN=Football
PTYNEN
PTYN Enable
Enables (1) or disables (0) the PTYN service.
PTYNEN=1
Enables the PTYN service
(0, 1)
RT1
Radiotext 1
Up to 64 characters long text message to be displayed on receiver in Radiotext format. Primarily used for song
titles streaming etc. Car radios usually don’t support this service, Dynamic PS can be used instead.
RT1=Hello World
RT1EN
RT1 Enable
Enables (1) or disables (0) the Radiotext 1.
RT1EN=1
Enables the RT1
(0, 1)
30
RT2
Radiotext 2
Up to 64 characters long text message to be displayed on receiver in Radiotext format. Alternatively used in
conjunction with Messages Commands. Car radios usually don’t support this service, Dynamic PS can be
used instead.
RT2=Hello World
RT2EN
RT2 Enable
Enables (1) or disables (0) the Radiotext 2.
RT2EN=1
Enables the RT2
RT2TYPE
Radiotext 2 Type (obsolete, use RTTYPE instead)
This command is obsolete and its support is no longer guaranteed.
(0, 1)
(A, B)
RTPER
Radiotext Switching Period
(0-255)
Specifies the time in minutes between two switching of the Radiotext. The switching can occur between RT1
and RT2 or between messages specified for RT2 (command RT2MSG=AUTO).
RTPER=10
Sets the period to 10 min.
Sets the period to 0.5 min.
RTPER=0
RTTYPE
Radiotext Type
(0-2)
Specifies Radiotext type for RT1 and RT2
0 - A/A. Any Radiotext is always the same type.
1 - A/B. RT1 is always type A, RT2 is always type B.
2 - Automatic. Any change/update of the Radiotext causes the A/B flag to toggle. Default option. Required
for proper RT+ function.
If the receiver detects a change in the A/B flag, then the whole Radiotext display is usually cleared and the
newly received Radiotext message segments are written into the display. If the receiver detects no change in
the A/B flag, then the received text segments or characters are written into the existing displayed message.
Some receivers have two memory spaces for the Radiotext, one for type A and one for type B. Then they
display both messages consecutively in the loop.
RTTYPE=2
RSTDPS
Restart Dynamic PS
(0, 1)
1 – When the Dynamic PS text is changed and no Dynamic PS is running, it will start immediately.
0 – The SPSPER command drives the Dynamic PS start regardless of the fact that the Dynamic PS text was
changed.
Changing a Dynamic PS text (1 or 2) that is actually running will always cause its restart. This rule does
not apply to the DPS1ENQ command.
RSTDPS=1
SCRLSPD
Scrolling PS Speed
(0, 1)
Sets high (1) or low (0) speed of scrolling PS transmission. Although setting high speed gives the result
looking better, remember that on some receivers or under bad reception conditions the text may be
unreadable. The reason is absolutely outside the RDS encoder and comes out from the fact that scrolling PS
has never been included in RDS standard. Due to this the high speed is not recommended.
SCRLSPD=1
SPSPER
Static PS Period
(0-255)
Specifies the time between two repeats of the Dynamic PS text. Static PS (PS/TPS) is displayed during this
time. Increasing the value by 1 increases the period by approx. 2.7 seconds (exact value depends on Group
Sequence).
If value 255 is set, the Dynamic PS will be displayed only once if changed. RSTDPS parameter must be set to
1 in this case.
If both DPS1 and DPS2 are enabled, the SPSPER cannot be zero (0).
SPSPER=4
Sets the period duration to about 11 seconds.
31
TA
Traffic Announcement
(0, 1)
Indicates instantaneous presence (1) of traffic information during broadcasting.
When this value is set to 1 by external TA switch, the value specified by TA command has no effect.
When this value is set to 1 by TA command, the value set by external TA switch has no effect.
Switching the PROGRAM causes clearing of the TA flag.
Note: In some cases the RDS encoder drives the TP and TA flags automatically, especially if EON feature is
enabled. This ensures that these flags are set correctly under all conditions.
TA=1
TATMOUT
TA Timeout
(0-127) [+128]
Specifies a maximum duration in minutes during which the TA parameter can remain active.
0 - Disables the TA timeout feature. External TA switch is level controlled (logic 0 means TA=1).
1-127 - Specifies a maximum duration in minutes during which the TA parameter can remain active (1).
Then the TA flag is set back to zero (0). External TA switch is activated by falling edge. Rising edge
is ignored.
+128 - Adding 128 results in the same behavior as above except that also rising edge can set the TA back to
zero (if detected before the timeout).
Note: The timeout is synchronized with real time clock minutes, i.e. the timeout event can only occur in
whole minutes.
Note: The TATMOUT command doesn’t affect the EON1TA switching. The External EON1TA switch can be
level controlled only.
Note: If TP=0, the TA Timeout is always set to 0.
TATMOUT=0
No timeout. Logic 0 on the TA switch input results in TA=1, logic 1 or no
connection results in TA=0.
TA is activated (set to 1) on falling edge on the TA switch input (logic 1 to logic 0
TATMOUT=2
transition). After 2 minutes the TA is set back to 0. Rising edge is ignored so may
occur anytime.
TA is activated on falling edge on the TA switch input. The TA is set back to 0 on
TATMOUT=130
either the rising edge or after 2 minutes timeout, depending on which event
occurs first.
TP
Traffic Program
(0, 1)
This is a flag to indicate that the tuned program carries traffic announcements. The TP flag must only be set
on programs that dynamically switch on the TA identification during traffic announcements. The signal
shall be taken into account during automatic search tuning.
Note: In some cases the RDS encoder drives the TP and TA flags automatically, mainly if EON feature is
enabled. This ensures that these flags are set correctly under all conditions.
TP=1
TPS
Traffic PS
Static text displayed on receiver during traffic announcements. Max. 8 characters long.
The TPS= command requires additional processing time of up to 400 ms for internal synchronisation with
RDS group order.
TPS=TRAFFIC
TPS=
Disables the Traffic PS
32
INIT
Initialization
Sets most parameters and services in actually selected Program to their default values. Does not clear
Messages and Scheduling items.
Apply for example if new blank EEPROM is placed on the board or if the RDS encoder was previously used
for another station.
INIT
Initialize the program bank that is actually selected.
*CC=
PROGRAM=2
INIT
*ALL
PROGRAM=1
INIT
*ALL
TIME=HH:MM
DATE=DD.MM.YY
Complete initialization procedure. Replace the HH:MM with actual time and the
DD.MM.YY with actual date.
Note: This initialization sequence must always be applied if new blank
EEPROM is placed on the board in production process. Alternatively use the
Windows control software: Options – Special – Initialize.
ALL
Store All
Stores all settings into the non-volatile EEPROM memory.
*ALL
HELP
Help
Shows all commands available.
HELP
33
12.3 EON Commands
EONxAF
EON x Frequencies
(87.6-107.9)
List of Other Network frequencies that can be received in the area covered by linking
station. Each item is in MHz representation in range of 87.6-107.9 MHz. Up to 25 items
allowed.
EON1AF=98.0,99.3 Sets 98.0 and 99.3 MHz frequencies for Other Network 1
EONxAFCH EON x Frequency channels
H (01-CC)
List of Other Network frequency channels that can be received in the area covered by
linking station. Each item is in hexadecimal representation in range of 01-CC (87.6-107.9
MHz). Up to 25 items allowed.
EON1AFCH=01,3B
Sets 87.6 and 93.4 MHz frequencies for Other Network 1
EONxEN
EON x Enable
Enables (1) or disables (0) the link to the Other Network.
(0, 1)
EON1EN=1
EONxPI
EON x Program Identification
H (0000-FFFF)
Identification code of the Other Network. Always contains four hexadecimal digits.
EON1PI=24F1
EONxPIN
EON x Program Item Number
The code in DD,HH,MM format should enable receivers and recorders designed to make
use of this feature to respond to the particular program item(s) that the user has preselected.
EON1PIN=12,16,40
EONxPS
EON x Program Service name
Program Service name of the Other Network.
EON1PIN=12,16,40
EONxPTY
EON x Program Type number
Program type number of the Other Network.
(0-31)
EON1PTY=3
EONxTA
EON x Traffic Announcement
(0, 1)
If set to 1, switches the receiver to corresponding Other Network for duration of the traffic
announcement.
Can’t be set to 1 if:
corresponding Other Network has TP=0
corresponding Other Network is not enabled
The EON1TA flag can be also controlled by external TA/EON1TA switch.
Note: Setting any EON TA to is also signalized to the receiver by a series of group type 14B.
EON1TA=1
EONxTP
EON x Traffic Program
Traffic Program flag of the Other Network.
EON1TP=1
*EON
Store all EON data into EEPROM
Stores all EON data into EEPROM. TA flags are not stored.
*EON
x is in range 1-4
(0, 1)
34
12.4 Messages Commands
These commands are provided for working with the bank of text messages that is useful especially for offline
operation of the RDS encoder or in conjunction with the scheduling feature. Using these commands you may enter
the text messages and assign them to radiotext or dynamic PS.
MSGxx
Text Message
Specifies the message text. Since there is a place for 99 messages in the memory, the
number xx must be in range 01-99.
MSG01=Hello World
MSGxxD
Message Destination
(0-3)
Specifies the destination of the message used for automatic message switching. The
number xx must be in range 01-99.
0 - Message not used for automatic switching
1 - DPS2
2 - RT2
3 - DPS2 and RT2
MSG01D=1
MSGLIST
List of Messages
Shows all messages present in the memory and its destination.
MSGLIST
DPS2MSG
Dynamic PS 2 Message Number
(0-99, AUTO)
0 - Default DPS2 text specified by DPS2 command or last DPS2MSG command is
selected.
1-99 - The message of the number is selected for the DPS2.
AUTO - Messages are selected automatically in ascending order. Only messages
chosen by the MSGxxD command are selected.
DPS2MSG=AUTO
RT2MSG
Radiotext 2 Message Number
(0-99, AUTO)
0 - Default RT2 text specified by RT2 command or last RT2MSG command is selected.
1-99 - The message of the number is selected for the RT2.
AUTO - Messages are selected automatically in ascending order. Only messages
chosen by the MSGxxD command are selected.
RT2MSG=1
xx is in decimal range 01-99
35
12.5 Scheduling Commands
S
List of Scheduling Items
Shows all scheduling items. Items with no day specified are not showed.
Each item is represented by the following order: Item No., Days, Times, Command, PTY.
S
SEN
Scheduling Enable
Enables (1)/disables (0) the scheduling feature.
SEN=1
Enables the scheduling feature.
(0, 1)
SxxC
Scheduling Item Command
Specifies the command to execute.
Max. command length is 35 characters. Only commands from the second column of the
Command Summary are allowed.
*S01C=RDSGEN=0
*S03C=RT2MSG=12
*S04C=
Clears (disables) the command for the item 04.
SxxD
Scheduling Item Days
Specifies the days for which the item is valid.
Monday = 1.
(1-7)
*S03D=12367
SxxP
Scheduling Item PTY
(0-31)
Allows including optional Program Type information so that the Command may be
used for another RDS service change.
*S03P=15
Sets the PTY to 15 (Other M)
*S04P=
Clears (disables) the PTY option for the item 04.
SxxT
Scheduling Item Times
Specifies the times in 24-hours HH:MM format at which the item command is executed.
Wildcard XX can be used instead of hour number meaning that the item will be executed
each hour in specified minute.
If more items are scheduled for the same time, all these items are executed in ascending
order.
Up to 12 times allowed for each item.
*S03T=XX:30,12:00
xx is in decimal range 01-48
36
12.6 System Commands
COMSPD
COM Port Speed
(0-4)
Specifies the COM port speed. If changed, any valid command must be sent to the RDS encoder on the new
speed otherwise the speed will be set back to its previous value during following minute. This prevents
setting an incorrect speed not supported by the communication channel that can result in connection lost.
0 - 1200 bps
1 - 2400 bps (default)
2 - 4800 bps
3 - 9600 bps
4 - 19200 bps
This command has the same effect as SPEED but the format of input is different.
COMSPD=1
CT
Clock Time and Date
Enables (1) or disables (0) time and date transmission in CT format.
(0, 1)
CT=1
DATE
Date
Specifies the actual date in DD.MM.YY format.
The time value stored into EEPROM memory is used on next power up if no battery backup circuit is
connected to the IIC bus.
DATE=30.11.05
30th of November 2005
Not implemented, use MJD instead.
DATE
ECHO
Terminal Echo
(0, 1)
Determines if the RDS encoder sends an echo (1) of each character or not (0), that it receives via COM port.
ECHO=1
EXTSYNC
External Pilot Synchronization
0 - Forced internal clock source (for mono transmission)
1 - Automatic external synchronization if pilot tone is present
(0, 1)
EXTSYNC=1
LEVEL
RDS Signal Level
(0-255)
Sets the RDS signal level, directly affects the injection of the RDS signal into the FM transmitter.
0 = minimum level, 255=maximum level.
Note: This command will apply only if appropriate hardware is integrated on the RDS encoder board. In
other cases use the on-board trimmer for adjust the RDS signal level.
LEVEL=120
LTO
Local Time Offset
±(0-24)
Specifies the offset between the local time and the universal time (UTC). Expressed in multiples of halfhours.
LTO=+2
PHASE
RDS Signal Phase
Fixes the relative phase shift between the pilot tone and the RDS signal.
Changing the value by one results in 9.5 degrees phase shift change.
The value serves only as a scale, it may not provide real phase shift value.
PHASE=8
(0-18)
37
MJD
Modified Julian Day
Day, Month and Year coded as Modified Julian Day.
To find D, M and Y from MJD:
Y' = int [ (MJD - 15 078,2) / 365,25 ]
M' = int { [ MJD - 14 956,1 - int (Y' × 365,25) ] / 30,6001 }
D = MJD - 14 956 - int ( Y' × 365,25 ) - int ( M' × 30,6001 )
If M' = 14 or M' = 15, then K = 1; else K = 0
Y = Y' + K
M = M' - 1 - K × 12
To find MJD from D, M and Y:
If M = 1 or M = 2, then L = 1; else L = 0
MJD = 14 956 + D + int [ (Y - L) × 365,25] + int [ (M + 1 + L × 12) × 30,6001 ]
Y', M', K, L - intermediate variables.
MJD=00D7CD
18th of February 2010
H (000000-FFFFFF)
OSCDEV
This command is no longer supported.
PILOT
Pilot Tone Present
Indicates if pilot tone is present (1) or not (0).
PILOT
RDSGEN
RDS Generator
Disables (0) or enables (1) the RDS subcarrier generator. Does not affect any other functions.
(0, 1)
RDSGEN=0
RESET
Reset
Provokes a hardware reset of the RDS encoder and is equivalent to an "off-on" cycle of the RDS encoder.
RESET
SPEED
COM Port Speed
(1200, 2400, 4800, 9600, 19200)
Specifies the COM port speed. If changed, any valid command must be sent to the RDS encoder on the new
speed otherwise the speed will be set back to its previous value during following minute. This prevents setting
an incorrect speed not supported by the communication channel that can result in connection lost.
This command has the same effect as COMSPD but the format of input is different.
SPEED=2400
STATUS
RDS Encoder Status
Shows the most important operating values of the RDS encoder. You may also type ??.
STATUS
??
TIME
Time
(00:00-23:59, 00:00:00-23:59:59)
Specifies the actual time in HH:MM format (sets the second counter to 00) or in HH:MM:SS format. The time
value specified is a local time valid in the area of coverage.
The time value stored into EEPROM memory is used on next power up if no battery backup circuit is connected
to the IIC bus.
TIME=16:40
TIME=09:24:10
VER
Firmware Version
Returns the firmware version that is actually present in the RDS encoder.
VER
38
12.7 Advanced Commands
ADR
Encoder Address
(0-255)
Assigns an address to the RDS encoder. Allows establishing a network of more RDS encoders connected to the
same communication channel and controlling them independently. Up to 255 (ASCII control) or 63 (UECP control)
unique addresses are possible. For large networks the number of unique addresses can be expanded using the site
address (command SITE).
Addresses 0 and 255 are special case. Encoder with address 0 or 255 (default) is automatically active after reset for
unlimited time, i.e. after power-up the addressing feature is disabled for that encoder.
Encoder with address in range 1 to 254 is not active after reset and can be controlled only if it’s selected by the SEL
command.
See chapter 13.6 and 14 for more details.
*ADR=255
Sets the encoder address to 255 (disables the addressing feature).
Sets the encoder address to 3.
*ADR=3
Returns (shows) the encoder address.
ADR
CC
Conditional Command
Executes specified command when specified condition occurs. Optional ELSE command supported.
Syntax:
*CC=[aa]bcc:dddddddd
*CC=ELSE:eeeeeeee
where is:
aa - memory address pointer (00-FF)
b - condition operator
< - lower than
> - greater than
= - equal
! - not equal
B - bit cc of [aa] is set (numbered from LSB to MSB)
cc - value to compare (00-FF) or bit number (00-07)
dddddddd - the command executed if the condition is fulfilled
eeeeeeee - the command executed if the condition is not fulfilled (optional)
Max. command length is 31 characters. Once the command is executed, next execution is stopped until the
condition fulfilment changes. In other words, the command is executed only at the condition fulfilment change.
Both numbers aa and cc are in hexadecimal representation. Only one CC item is allowed. Only commands from the
second column of the Command Summary are allowed.
List of some applicable memory addresses:
13: PTY number (0-31)
15: number of DPS2 characters
28: Message counter (RT2)
29: Message counter (DPS2)
34: number of DPS1 characters
68: timer 0-8A, reset every minute
6A: one of the status bytes (bit 02 - DPS2 is running; bit 03 - DPS1 is running, bit 06 - external program switch)
71: Dynamic PS counter (points to the character that is actually transmitted on the first PS position)
76: static PS counter (0-SPSPER)
78: DPS number of repeats counter
8B: Group Sequence counter
BE: COM port timeout counter in minutes
C3: selection (SEL) counter
C6: Scheduling item number waiting (0, 1-48)
CC: timer 0-FF, increased on each end of PS transmission (approx. once per 0.5 sec. by default)
E4: local hour (0-23)
E5: local minute (0-59)
E9: COM port speed (0-4)
To check visually what value is on each address, type MEM xx where xx is the address desired.
39
Important note: The CC is a very “strong” command. Due to a theoretical possibility of bad setting that may cause
the unit stop responding (please don’t ask for an example) the Conditional Command is not active after power-up
for up to 30 seconds. This gives the user a time to type *CC= to disable the Conditional Command before it
becomes active.
Note: the Conditional Command execution is temporarily stopped when typing any command via the RS232.
*CC=[BE]<08:GRPSEQ=0220XY
Switches off the user defined groups transmission when there are
*CC=ELSE:GRPSEQ=022
no data on COM port for last 8 minutes. Useful to avoid
transmitting of out-of-date information if the data link crashes for
any reason.
*CC=[CC]B03:PS=RADIO
*CC=ELSE:PS=PRO 88
Periodically switches the PS between ‘RADIO’ and ‘PRO 88’.
*CC=[6A]B06:DPS2MSG=01
*CC=ELSE:DPS2MSG=02
If PROGRAM is set to 1 or 2, the external program switch will select
a text Message for the Dynamic PS 2. (If PROGAM is set to 0, the
status bit is always 0.)
PTYN=Football
*CC=[13]=04:PTYNEN=1
*CC=ELSE:PTYNEN=0
Sets PTYN name to ‘Football’. When PTY code ‘Sport’ is on-air,
additional PTYN name is included.
*CC=[4E]B06:RT2EN=1
*CC=ELSE:RT2EN=0
Enables RT2 for the duration of traffic announcement (TA)
*CC=[E9]!01:COMSPD=1
Does not allow to set COM port speed other than 2400 bps.
*CC=[E4]>0B:DPS2=Good afternoon
*CC=ELSE:DPS2=Good morning
Different DPS2 text for hours in range 0-11 and 12-23. Scheduling
feature can be used as well.
*CC=[C3]>05:SEL=254
If address of the unit is different from 254: Decreases the selection
timeout from default 20 minutes to 5 minutes.
If address of the unit is equal to 254: Disables the selection
timeout.
*CC=[71]<20:DPS1MOD=1
*CC=ELSE:DPS1MOD=2
Shows first part of DPS1 in mode 1, then switches to mode 2 for
the rest of the text.
CC
*CC=ELSE:
*CC=
Shows actual CC settings.
Disables the ELSE command.
Completely disables the Conditional Command feature.
ECC
Extended Country Code
Uniquely determines the country in conjunction with the first digit of PI.
ECC=00
Unknown/not used/not applicable.
H (00-FF)
ECC=E2
ECCEN
ECC and LIC Enable
Enables (1) or disables (0) the ECC and LIC features.
ECCEN=1
(0, 1)
40
G
Group
H (000000000000-FFFFFFFFFFFF)
Orders the RDS encoder to send directly RDS groups whose contents are free. The Group content is in
BBBBCCCCDDDD format where BBBB, CCCC and DDDD represent the contents of the block 2, block 3 and block
4 in hexadecimal expression. The RDS encoder calculates the CRC automatically.
The block 1 has not been specified as it is always the PI code programmed with the PI command.
For more details about the group coding see section 15.2.
Using this command, the RDS transmission can then be partially or fully controlled by an external application.
For full RDS stream control, 9600 bps or higher com. speed should be used. Next Group can follow after previous
command success characters (+).
G=380215D1A531
Group 3B containing 02 15D1 A531
GRPSEQ
Group Sequence
Defines the RDS group sequence. Allows the user to control the group order and adjust repetition rate of
individual RDS services. Max. 24 items are allowed. The services and groups are represented by following
symbols:
0 - Four groups 0A (MS, TA, DI, AF, one complete PS)
1 - Group 1A (ECC, LIC, PIN)
2 - Group 2A (RT)
A - Group 10A (PTYN)
E - Group 14A and 14B (EON)
X - Group from UDG1
Y - Group from UDG2
R - Group 3A/11A (RT+)
Services, which are not placed in the sequence, are disabled regardless of their individual settings.
Services, which are placed in the sequence and are disabled by their individual settings, are ignored (skipped).
Inserting a nonsense string will result in the same effect as inserting a single 0.
Inserting an unknown symbol will cause ignoring the rest of the string.
It's a good practice to assure that at least one 0 is present in each consecutive 6 symbols. It is recommended not to
place more than 4 same symbols consecutively.
Take into consideration that RDS does not know anything like empty groups or delays between groups. There
must be still some groups sent to the output.
The GRPSEQ command does not affect: group 4A (CT), user groups inserted using the G command or UECP.
GRPSEQ=02222
Four groups 0A followed by four groups 2A (very high Radiotext transmission rate),
other services are disabled.
Sets the groups sequence to default (022E1022EA022XYR).
GRPSEQ=
GRPSEQ=022E10XYYY High transmission rate of UDG2. PTYN and RT+ is disabled.
The RDS content is fully controlled via UDG1 (and possibly G command).
GRPSEQ=X
LIC
Language Identification Code
Enables a broadcaster to indicate the spoken language he is currently transmitting.
LIC=00
Unknown/not applicable
LIC=09
English
H (00-FF)
NOHDR
No Header Communication
(1)
If activated, any text incoming through the serial interface and followed by <Enter> will be automatically parsed
and will appear as Radiotext 1, Dynamic PS 1 or both. Control of other RDS services is not allowed until
deactivating the no header option.
To deactivate the no header communication, press the keyboard <Escape> key three times and then press
<Enter>. This sequence is equivalent to *NOHDR=0, which – of course – cannot be directly inserted.
See chapter 10 for more details.
*NOHDR=1
PIN
Program Item Number
The code in DD,HH,MM format should enable receivers and recorders designed to make use of this feature to
respond to the particular program item(s) that the user has preselected. Use is made of the scheduled program
time, to which is added the day of the month in order to avoid ambiguity.
PIN=12,16,40
41
PINEN
PIN Enable
Enables (1) or disables (0) the PIN service.
(0, 1)
PINEN=1
PROGRAM
Program Set
(0-2)
Specifies the program bank. RDS services in selected program bank are transmitted by the RDS encoder and can
be modified and stored into EEPROM memory. If Program is set to zero (0), most of store operations are not
allowed to protect the data (since the destination in EEPROM is undefined in general).
1 - Program 1 is selected (default)
2 - Program 2 is selected
0 - External program switch selects the program
PROGRAM=1
PSW
PS Window
Returns actual Program Service name that is being sent by the RDS encoder. The value returned is an output of
internal real-time RDS decoder so it’s affected also by Dynamic PS and user defined groups.
PSW
RTP
Radiotext Plus Tagging Data
(00-31; 00-31; 00-31; 00-31; 00-31; 00-15)
Six 2-digit decimal numbers of RT+ tagging data in this order:
Tag 1 type, tag 1 start, tag 1 length, tag 2 type, tag 2 start, tag 2 length.
Start marker 00 means the first character in the Radiotext. Length marker gives the number of characters
following the first character at the start position.
The tagging data must be associated with actual Radiotext 1.
The tagging data are transmitted as groups 3A (RT+ ODA AID) and 11A (RT+ Tagging Data).
On each enter of the tagging data internal Toggle bit automatically changes its state from 0 to 1 or from 1 to 0.
First entering of the tagging data automatically enables the internal RT+ feature until power off or reset.
The RT+ is active only if symbol ‘R’ is present in the Group sequence.
If both tag 1 type and tag 2 type are set to 00, internal RT+ running bit is temporarily hold low until at least one
valid tag type is entered.
RT1=Now playing: Novaspace – Time After Time
RTP=04,13,08,01,25,14
RTPRUN
Radiotext Plus Running Bit
0 - Bit set low (RT1 no longer contains RT+ data), automatically set to 1 on next RTP= entry.
1 - Bit set high (actual RT1 contains RT+ data)
2 - Disable internal RT+ feature
This command is not required for common use since the running bit is set automatically.
(0, 1, 2)
RTPRUN=1
SHORTRT
Short Radiotext
(0, 1)
If enabled (1), all new inserted Radiotexts shorter than 60 characters will be followed by Carriage Return and the
remaining spaces will be cut. Default value is 0.
SHORTRT=1
>
Assign Last Value
This command is useful for ASCII terminal control. It allows to handover texts between most commands or
services. See the examples below.
If the last value is empty or not available (cleared by launching a Scheduling or CC item), nothing will happen.
Note: This command is not recommended for automated control.
PS=RADIO 88
Sets the ‘RADIO 88’ program service name
>TPS
and uses the same name also for Traffic PS
MSG01
>*MSG02
Shows the Message 01 text
and copies it to Message 02
DPS1
>RT2
Shows the Dynamic PS 1 text
and copies it to Radiotext 2
42
SEL
Select Encoder
(0-255[,0-254]), ALL
Selects encoder(s) with specified encoder address and optional site address.
Only selected encoders can accept ASCII commands. Other encoders listening on the same channel are unselected
immediately.
Note: Encoder addresses 0 and 255 are special case. Encoder with address 0 or 255 (default) is automatically
active after reset for unlimited time, i.e. the addressing feature is disabled for that encoder and thus no selection
is required.
For encoder address range 1 to 254 the unit is selected for 20 minutes (selection timeout) or until another encoder
is selected.
If the optional site address is not specified, it is expected to be 0.
Address 0 is a "global" address, i.e. selecting an address 0 works as a 'wild card' and it selects encoders with any
address. See chapter 13.6 for more details.
Note: This command has no effect on UECP reception which uses individual method of selection included in each
record.
SEL=0,0
Selects all encoders that are listening on the communication channel (or also an
SEL=0
encoder with unknown address).
Notes: These three entries are equivalent, all use a 'wild card'. Due to safety reasons
SEL=ALL
user is not allowed to change encoder address or site address if the encoder has been
selected using the wild card.
SEL=3
SEL=3,0
SEL=3,25
SEL=0,25
Selects encoders with address 3 on all sites
Selects encoders with address 3 on all sites (the same as above)
Selects encoder with address 3 on site 25
Selects all encoders on site 25
SEL=ALL
*ADR=4
Using a wild card for encoder selection...
Forbidden! You cannot change the encoder address if a wild card has been used.
SEL=3,25
*ADR=4
Using exact address values...
OK, encoder address changed from 3 to 4.
SITE
Site Address
(0-254)
Assigns a site address to the RDS encoder. Useful for large networks.
A site address of 0 means that the encoder will accept the ASCII communication only if site address is 0 (or not
specified) in the selection (command SEL).
See chapter 13.6 and 14 for more details.
*SITE=25
UDG1
User Defined Groups 1
Specifies up to 8 groups in BBBBCCCCDDDD format, which are repeatedly transmitted in sequence by the RDS
encoder. BBBB, CCCC and DDDD represent the contents of the block 2, block 3 and block 4 in hexadecimal
expression. For more details about the group coding see section 15.2.
When entering new group(s), previous groups are removed from the UDG1 buffer.
UDG1=80001A961C97
Sets TMC group 8A containing 00 1A96 1C97
UDG1=
Clears the UDG1 groups
UDG2
User Defined Groups 2
Specifies up to 8 groups in BBBBCCCCDDDD format, which are repeatedly transmitted in sequence by the RDS
encoder. BBBB, CCCC and DDDD represent the contents of the block 2, block 3 and block 4 in hexadecimal
expression. For more details about the group coding see section 15.2.
When entering new group(s), previous groups are removed from the UDG2 buffer.
UDG2=380215D1A531,38058DB3B61E
Sets two UDG2 groups
Clears the UDG2 groups
UDG2=
UECP
UECP Enable
Enables (1) or disables (0) the UECP support. ASCII commands are accepted regardless of this value.
Disabled by default.
UECP=1
(0, 1)
43
12.8 Memory Organization
12.9 Dynamic PS 1 and Dynamic PS 2 Summary
Real time showing capability
Display modes available
Dynamic PS 1
Dynamic PS 2
yes, in mode 0
and 2
yes, in mode 0
and 2
4
4
Text queue available
yes
no
Max. text length
255
255
127
N/A
yes, in mode 2
and 3
no
Max. queued text length
Removing redundant spaces from the text end
Allows transmission of Messages
Typically used for
no
yes
Commercials,
news and
"on-air" texts
Fixed texts from
the Messages
bank
44
13 Further Features
13.1 Bypass Relay
The RDS encoder board includes a bypass relay providing an alternative way for the MPX signal on power supply
failure (applies to loopthrough connection mode only).
13.2 LED Indication
Two LED diodes are used to indicate operating status of the RDS encoder:
Start-up
Operation
LED 1
LED 2
off
on
Initialization
Status
on
off
Firmware update in progress
— — — — — (1 sec.)
Normal operation, unit selected
—
Normal operation, unit unselected
or no header communication is active
—
— (2 sec.)
-----
(1 sec.)
An error occurred, unit selected
- - -
(2 sec.)
An error occurred, unit unselected
on
Receiving data from RS-232
on
External pilot synchronization is active
off
Internal clock source is selected
-----
Stereo encoder error - pilot tone present but does
not meet the specification required (chapter 2).
Switch the RDS encoder to internal clock source.
13.3 External Program Switch
External program switch input allows you to select one of two program banks available by an external device. This
device can be a simple switch or a device with digital output. The PROGRAM parameter must be set to 0 to enable this
feature. The program input is level controlled, the switch shut-off or logical 1 selects the Program 1, the switch
closure or logical 0 selects the Program 2.
Alternatively the switch input can be used for selecting a text message or for control of other RDS service or setting.
For more details see chapter 12.7 - Conditional Command.
13.4 External TA/EON1TA Switch
External TA/EON1TA switch input allows you to control the Traffic Announcement parameter by an external
device. This device can be a simple switch or a device with digital output. The TA input is level or edge activated, as
specified by the TATMOUT command.
If level controlled, the switch closure or logic 0 activates the TA (sets to 1). The switch shut-off or logic 1
deactivates the TA (sets to 0).
If edge activated, a falling edge (logic 1 to logic 0 transition) activates the TA. Then the TA is deactivated after the
duration specified by the TATMOUT command. Optionally a rising edge may deactivate the TA if occurs first.
The TATMOUT command doesn’t affect the EON1TA switching. If EON1TA is controlled using the external switch,
the control is always based on the level.
The switch function table:
TP (local)
EON1 Enabled
Switch function
1
don’t care
TA
0
1
EON1TA
0
0
Switch disabled
45
13.5 Showing Real Time in Dynamic PS
It’s possible to show real time in Dynamic PS in mode 0 and 2. To show the time, the text must contain %HH-MM%%
string and this string must exactly fill the 8-character window. Then on each string occurrence place the real time will
be displayed. The separator between hours and minutes is user selectable.
13.6 Addressing
13.6.1 Why use addressing?
If only one RDS encoder unit is connected to the RS-232, USB or Ethernet port, there is no need to use the addressing
feature and you should simply ignore it.
If more encoders are connected to one communication channel and the user needs to control the encoders
independently, then the addressing feature is very useful. You can communicate only with selected encoder(s). A
good example of this application is remote control via satellite when one satellite uplink is used to distribute RDS
control commands to many transmitter sites and each transmitter may then carry different RDS data.
13.6.2 Establishing a simple network of RDS encoders
Let's assume the simplest network possible with only two encoders. For addressing in that network we can use the
encoder address only and leave the site address set to 0.
1.
Set the encoder's addresses before final installation:
Encoder 1: *ADR=1 and *SITE=0
Encoder 2: *ADR=2 and *SITE=0
2.
Install the encoders on the remote site.
3.
The uplink communication may look like this (setting common PI but different PS):
ASCII control:
SEL=0
PI=26F8
SEL=1
PS=ENCODER1
SEL=2
PS=ENCODER2
UECP control:
FE 00 00 00 05 01 00 00 26 F8 CC 8A FF
FE 00 01 00 0B 02 00 00 45 4E 43 4F 44 45 52 31 E9 2D FF
FE 00 02 00 0B 02 00 00 45 4E 43 4F 44 45 52 32 54 ED FF
46
13.7 Expansion IIC Bus
The expansion IIC bus provided on connector J3 allows connection of varied devices respecting the customer needs.
For example LCD display, digital potentiometer etc.
13.8 Real-Time Backup
A battery-powered RTC circuit provides real-time backup for case of mains power supply interruption or switch off.
Use TIME and DATE commands to set the time and date information or simply use the Windows control software.
13.9 Firmware Upgrade
The RDS encoder has a firmware upgrade capability. This allows easily implementing of new features in future.
When a new firmware version is released, special simple Windows application provides the firmware upgrade. The
firmware upgrades are provided at no costs. Please refer to the website for more information.
13.10 On-line Support
Not sure how to set-up the unit? Some RDS related feature is missing? Feel free to contact us via the email!
Important note: Before sending an email please make sure you have read entire content of this manual (incl. section
15.3), control software help file and also forum, F.A.Q. and tips on the website. Your question may be already
answered in this extensive knowledge base.
47
14 Universal Encoder Communication Protocol (UECP)
The UECP protocol (SPB 490) is an industrial standard for RDS encoder control to facilitate the inter-working of
various RDS systems components regardless of the supplier. Due to the fact that it cannot handle specific functions
and characteristics of a particular model, it must be considered as a complementary method of the RDS encoder
control. Its implementation in the PIRA32 is only partial. It should provide a possibility of basic RDS services control
for the UECP based systems whereas other services have been set in advance using the way described on previous
pages.
14.1.1 To turn-on the UECP support
1.
2.
3.
4.
Configure all RDS services and settings as required.
Where required, configure the RDS encoder address and Site address using the commands *ADR= and *SITE=
or using the Windows control software.
Find out and set the right baudrate (speed). For example SPEED=9600 and *SPEED.
The UECP support is disabled by default. Type UECP=1 and *UECP or use the Windows control software to
turn-on the UECP support.
14.1.2 General UECP frame (record) format
Note: Read more information about the UECP in the document "SPB 490 Universal Encoder Communication
Protocol" (published by RDS Forum).
14.1.3 UECP addressing
The address field comprises two elements, these are:
•
•
Site address, 10 bits (most significant)
Encoder address, 6 bits (least significant)
For a message to be acceptable to a particular encoder both the site address and the encoder address must match the
respective address of the RDS encoder. Additional exceptions apply:
If the Site address in the UECP record is set to 0, any Site will accept that record. If the Encoder address in the UECP
record is set to 0, any Encoder on the site will accept that record.
If the Site address (SITE) of the RDS encoder is set to 0, UECP records with any Site address will be accepted. If the
Encoder address (ADR) of the RDS encoder is set to 0 or 255, UECP records with any Encoder address will be
accepted.
Thus an encoder with Encoder address set to 0 or 255 and Site address set to 0 will accept all UECP frames.
The UECP addressing work independently of the ASCII commands addressing, e.g. it's not important for the UECP
record processing if the RDS encoder is selected or not (command SEL).
48
14.1.4 The UECP implementation in the PIRA32, its characteristics and limitations
MEC
Meaning
01
PI
02
PS
03
TA/TP
04
DI/PTYI
05
MS
07
PTY
Notes
0A
RT
0D
Real time clock
1
13
AF
24
Free-format group
3, 4
30
TMC
3, 5
40
ODA configuration and short message command
3, 6
42
ODA free-format group
3, 7
2
Field
Handling
ADD
Site address 0-255, Encoder address 0-63, note 7.
SQC
Sequence counter – if consecutive UECP records will have the same SQC value, only the first correctly
received record will be applied. Except exists for records with SQC of 0x00 which are always accepted.
DSN
Ignored
PSN
Ignored
Notes:
1) Text transferred to RT1. Control bits 1 to 7 are ignored.
2) Start location ignored.
3) Buffer size 4 groups (FIFO type), shared by all ODA, TMC and free-format Message elements. Number of
repeats is assigned to each group in the FIFO buffer so one group occupies one position in the buffer regardless
of number of repeats.
Important: If using any of the MEC 24, 30, 40 or 42, the space for ASCII command UDG2 is automatically limited
to max. 3 groups.
4) Buffer configuration bit 5 ignored. Buffer configuration bit 6 meaning: 0 – no repeat, 1 – repeat the group one
time, then clear.
5) Full support except the priority and buffer configuration. When inserting more TMC groups at once, the
encoder automatically assures 3 group long gap between two different TMC groups in the data transmitted.
6) Timeout and buffer configuration ignored. Always inserts one group through the FIFO buffer.
7) Priority, mode and buffer configuration ignored. Always inserts one group through the FIFO buffer.
8) Other MEC's are ignored, incl. all possible Message elements that may follow within the same Message field.
Due to mistake in the UECP specification (unknown Message element length in general) it's recommended in
general not to insert more than one Message element inside each Message field to maintain compatibility.
9) The RDS encoder address list can contain only two items for the Site address and two items for the Encoder
address. One of these items is always set to 0, the second can be set using the commands *SITE= and *ADR=.
The UECP communication is always unidirectional. There are no responses sent to the UECP records.
When the UECP is enabled, the RDS encoder accepts any mixture of ASCII commands and UECP records on the
same communication port.
Any characters which follow the UECP start byte (0xFE) will be ignored by the ASCII command interpreter until one
of the following conditions occurs:
•
•
•
reception of the UECP stop byte (0xFF)
reception of 260 characters
COM port timeout (2 minutes)
For this reason take care not to send the UECP start byte within an ASCII command when the UECP is enabled.
49
14.2 Traffic Message Channel (TMC) Application Notes
14.2.1 Basic requirements
The TMC service can work only if there is an application that we can call 'TMC data provider'. The TMC data
provider collects all related information and translates it into RDS groups 8A type. The output of the TMC data
provider must be either by means of ASCII command G= or (more often) coded as UECP command with MEC 30. We
will deal with the second case in following text.
Nowadays the TMC service is coded as an ODA application. Thus there must be ODA AID groups 3A transmitted in
addition to the 8A groups. This can be done for example using the UECP MEC 24. The 3A groups typically carry
fixed content so in some cases they can be inserted into the RDS encoder also one-time using the command UDG1= or
UDG2=.
The Address and Site fields are optional. When the TMC data provider drives one RDS encoder only, these fields are
usually set to zero. However there can be more RDS encoders connected with various Address and Site values. Each
encoder will accept only the UECP records that match the Address and Site criteria. This configuration has been
tested successfully simulating a network of more than 60 encoders (equivalent to full load of one 9600 bps channel).
14.2.2 Preparing for the TMC transmission
1. Configure all static parameters of the RDS encoder. Enable the UECP (UECP=1↵ *UECP↵).
2. Where required, store the fixed 3A groups using the commands UDG1= or UDG2=
(for example: UDG1=30100646CD46,30104080CD46↵ *UDG1↵).
In this case make sure the UDG groups are included in the Group sequence (symbols X or Y).
3. Decide for the communication baudrate. Configure the RDS encoder and TMC data provider baudrate.
4. Configure the Site and Address values.
14.2.3 Application example
This application example shows TMC data and ODA AID information inserted by UECP commands 30 and 24.
Time
Group
UECP command
Comment
9:27:58
3A: 8A 0646 CD46
FE 00 00 D0 07 24 06 10 06 46 CD 46 B9 68 FF
ODA AID variant 0
9:27:58
8A: 07 C801 4689
FE 00 00 D1 08 30 06 06 07 C8 01 46 89 94 54 FF
TMC 8A, two repeats
9:27:59
8A: 07 4984 6000
FE 00 00 D2 08 30 06 06 07 49 84 60 00 F2 5C FF
TMC 8A, two repeats
9:27:59
3A: 8A 4080 CD46
FE 00 00 D3 07 24 06 10 40 80 CD 46 49 7E FF
ODA AID variant 1
9:28:00
-
FE 00 00 D4 09 0D 0A 0C 10 09 1C 00 00 02 60 F3 FF
Encoder time adjust
9:28:00
8A: 01 883D 1A74
FE 00 00 D5 08 30 06 06 01 88 3D 1A 74 5F DC FF
TMC 8A, two repeats
9:28:00
3A: 8A 0646 CD46
FE 00 00 D6 07 24 06 10 06 46 CD 46 E3 E0 FF
ODA AID variant 0
9:28:01
8A: 02 8F50 15DD
FE 00 00 D7 08 30 06 06 02 8F 50 15 DD D3 6E FF
TMC 8A, two repeats
9:28:01
8A: 02 5404 ABD4
FE 00 00 D8 08 30 06 06 02 54 04 AB D4 1D E6 FF
TMC 8A, two repeats
9:28:01
3A: 8A 4080 CD46
FE 00 00 D9 07 24 06 10 40 80 CD 46 A6 E6 FF
ODA AID variant 1
9:28:02
8A: 05 497C 8000
FE 00 00 DA 08 30 06 06 05 49 7C 80 00 A6 D5 FF
TMC 8A, two repeats
...
...
Notes:
1) Any group inserted using the UECP elements 24, 30, 40 or 42 is not affected by the Group sequence. Instead of
this the group is put in the UECP FIFO buffer and transmitted as soon as possible. Thus the TMC data
providing application has full control over the TMC transmission.
50
15 Annexes
15.1 Communication Protocol Implementation Flowcharts
Following flowcharts allow the developer to implement the PIRA32 ASCII protocol to any application easily.
15.1.1 Unidirectional Communication
Note: This flowchart applies to firmware versions
1.4a and later. Older firmware versions require
additional delay behind all commands if two or
more commands are sent in one sequence. This
delay duration should be at least 50 ms. If the
application doesn’t include this additional delay,
it should inform the user that firmware version
1.4a or later is recommended. The firmware
upgrade utility is free for download from the
website.
The bidirectional communication flowcharts
apply to all firmware versions.
Send command basic flowchart (unidirectional communication).
15.1.2 Bidirectional Communication
Confirm sequences definition:
CS1=Chr(13)+Chr(10)+’+’+Chr(13)+Chr(10)+Chr(13)+Chr(10)
CS2=Chr(13)+Chr(10)+’!’+Chr(13)+Chr(10)+Chr(13)+Chr(10)
CS3=Chr(13)+Chr(10)+’-’+Chr(13)+Chr(10)+Chr(13)+Chr(10)
CS4=Chr(13)+Chr(10)+’/’+Chr(13)+Chr(10)+Chr(13)+Chr(10)
Variables used:
STR, REC, CS, COMMAND: string
ACCEPTED, ERROR: integer/boolean
TIME: time/float
Other values:
TIMEOUT: COM port timeout, usually ≥400 milliseconds
Calling examples:
SendBD(‘PS=PRO 88’)
if ERROR or not ACCEPTED then write(‘Error’)
S=Read(‘PS’)
if ERROR or not ACCEPTED then S=’’
Note: The flowcharts are valid for any ECHO value.
51
Send command flowchart (bidirectional communication).
52
Read value flowchart.
53
15.2 RDS Group Format
Following information is provided for better understanding to the RDS principles and the user defined group coding.
The largest element in the RDS coding structure is called a "group" of 104 bits each. Each group comprises 4 blocks of
26 bits each. Each block comprises an information word and a checkword. Each information word comprises 16 bits.
Each checkword comprises 10 bits.
All information words, checkwords, binary numbers or binary address values have their most significant bit (MSB)
transmitted first.
The data transmission is fully synchronous and there are no gaps between the groups or blocks. The basic data-rate
of the system is 1187.5 bit/s. Thus transmission of one group takes about 87.6 ms and about 11.4 groups are
transmitted per one second.
General RDS group format.
15.2.1 Basic principles and rules
The services which are to be repeated most frequently, and for which a short acquisition time is required (PI, TP,
PTY), in general occupy the same fixed positions within every group.
There is no fixed rhythm of repetition of the various types of group, i.e. there is ample flexibility to interleave the
various kinds of message to suit the needs of the users at any given time.
The first four bits of the second block of every group are allocated to a four-bit code which specifies the
application of the group - group type. Groups are referred to as types 0 to 15.
For each type (0 to 15) two "versions" can be defined. The "version" is specified by the fifth bit of block 2: 0 =
version A, 1 = version B.
For all groups of version B the PI is inserted also in block 3 so this block cannot carry any other information when
version B of the group is used.
15.2.2 Remarks
One complete PS label consists of 4 groups. So one PS takes 350 ms of the transmission time. It may be found from
experience that any RDS text should be transmitted at least twice to improve reception reliability. With regard to
other services included in the RDS the repetition rate of dynamic/scrolling PS usually cannot be lower than one
second.
Checkwords and offsets are always computed and inserted automatically by the RDS encoder.
PI is always inserted automatically by the RDS encoder in block 1, and also in block 3 for version B of the group.
Due to this the block 1 is never specified when inserting any user defined group.
TP and PTY are always inserted automatically by the RDS encoder using OR method (logical sum) on the
appropriate bit positions.
54
15.2.3 TDC group coding (5A, 5B)
Group format in hexadecimal representation (version A): 50BBCCCCDDDD,
group format in hexadecimal representation (version B): 58BB0000DDDD,
where BB, CCCC and DDDD represent the contents of the block 2 (bits 4 to 0), block 3 and block 4.
15.2.4 IH group coding (6A, 6B)
Group format in hexadecimal representation (version A): 60BBCCCCDDDD,
group format in hexadecimal representation (version B): 68BB0000DDDD,
where BB, CCCC and DDDD represent the contents of the block 2 (bits 4 to 0), block 3 and block 4.
15.2.5 AID for ODA group coding (3A)
Group format in hexadecimal representation: 30BBCCCCDDDD,
where BB, CCCC and DDDD represent the contents of the block 2 (bits 4 to 0), block 3 and block 4.
These groups are used to identify the Open Data Application in use, on an RDS transmission. The type 3A group
conveys, to a receiver, information about which Open Data Applications are carried on a particular transmission
(AID Code) and in which groups they will be found (Application group type code).
The Application group type code and the AID Code are obligatory, while the Message field is optional and should be
set to zeros if not used.
Since the 3A groups usually carry fixed static content, they may be inserted using either the UDG1= or UDG2=
command for automatic cyclic transmission while the ODA application groups may be inserted by any command or
method (G=, UDG1=, UDG2= or UECP MEC 24 or 42).
55
15.2.6 Example of ODA user defined group coding (Radiotext Plus)
Let’s show the group coding example on the popular RT+ service. We need to insert group type 3A (Application
identification for ODA) to the RDS stream pointing to the RT+ service which is – in this example - carried in group
11A.
Let's assume following RT content: Enigma - The Eyes of Truth
Appropriate 3A and 11A groups have following structure and coding:
Group 3A
Let's assume following variable values:
AGT: group type 11, version A (0), rfu: reserved, set as zeros, CB flag: 0, SC flag: 0, TN: N/A, set as zeros, AID code
is 4BD7 for the RT+ service.
Blocks 2 to 4 in binary representation:
0011 0000 0001 0110 | 0000 0000 0000 0000 | 0100 1011 1101 0111
Blocks 2 to 4 in hexadecimal representation:
3016 | 0000 | 4BD7
Group 11A
Let's assume following variable values:
AGT: group type 11, version A (0), ITG: 0, IRB: 1, RTCT1: 1 (Title), SM1: 9 (10th RT character), LM1: 16 (17 characters
long), RTCT2: 4 (Artist), SM2: 0 (first RT character), LM2: 5 (6 characters long).
Blocks 2 to 4 in binary representation:
1011 0000 0000 1000 | 0010 0100 1010 0000 | 0010 0000 0000 0101
Blocks 2 to 4 in hexadecimal representation:
B008 | 24A0 | 2005
Inserting the RT+ groups using the UDG1 command:
UDG1=301600004BD7,B00824A02005
Note:
This example is for illustration only. The RT+ feature is directly supported by the RDS encoder (see section 12.7).
56
15.3 Troubleshooting
The RDS encoder has been designed to make its use as easy and painless as possible. However, success depends
upon a number of settings and things working together correctly. While correcting problems is usually quite simple,
the difficulty lays in knowing where to look.
Factory default settings assure right operation after first power-on. This section of the manual is designed to assist
you in determining the cause of problems that may occur so they can be fixed quickly.
Problem
No RDS output, no LED
indication.
No RDS output, LED
indicates operation.
Solution / Check
Section
related
5.3
5.1
5.4.1
13.2
Windows control software
Power supply problem.
RDS output connected to right input of the transmitter?
Adjust higher RDS level or higher input sensitivity on the transmitter.
RDS generator switched on?
Options – Special – Switch on RDS
The unit does not
communicate with PC and
the LED does not indicate
data receive. *)
5.5.7
11.1
13.2
Terminal
RDSGEN=1
Make sure all connectors are seated completely and where possible,
use screws to fix the connection.
Make sure you have selected right COM port.
Options – Preferences – List...
Try the unit with different cable and different PC.
The unit does not
communicate with PC but
the LED indicates that data
are received. *)
* Try after disabling the
bidirectional mode in
Preferences and clicking on
any Send button or using
Hyperterminal and typing a
series of <Enter>.
•
•
•
10.2.4
11.2
12.6
12.7
13.2
Radiotext stopped working
although I’m sure that it’s
enabled and entered
correctly.
12.7
Pilot tone is fed to the unit
but it is not indicated.
The unit loses time and date
after power off.
Enable Bidirectional and
Autodetect port speed options
(Options – Preferences)
Options – Special – Assign unit
address – Disable, override
Options – Special – No Header
mode – Switch off
Options – Special – Group
sequence – Default, Store.
GRPSEQ=
5.1
5.4.3
System sheet – Clock Source:
Auto, Store
EXTSYNC=1
4.1
4.2
Replace the on-board battery.
5.1
5.2
5.4.1
•
•
•
No audio on air
Try on each baudrate:
SEL=ALL
<ESC><ESC><ESC><Enter>
The RT service is not included in the Group sequence. This may occur
also after firmware update to version 1.5b. The Group sequence is a
new feature that needs to be initialized.
•
The audio is distorted.
There is a whistling in the
audio.
Baudrate differs from the unit configuration.
Addressing is enabled and the unit is unselected.
No header communication is active.
5.1
5.2
The unit is connected in loopthrough mode and the MPX level
exceeds 3.3 V pp but the JP1 is set to 1-2 instead of 2-3.
The unit is not connected in loopthrough mode but JP2 was
forgotten on the board. Remove the jumper.
The RDS level considerably exceeds maximum value allowed.
Adjust lower RDS level. Use an FM analyzer for the best result.
Applied input of the transmitter is not suitable for RDS. Follow
the transmitter documentation.
The unit is connected in loopthrough mode but JP2 is left open (not
present). Place the jumper on the JP2 position.
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