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  • Product Name:

    FMUSER RDS-A FM Broadcast RDS Encoder For Traffic Broadcasting DSP Concept and Effective Design

  • Categories:100W-1000W / Encoder / FM Transmitter / Products
  • Date:2019-10-10
  • UPDATE:2019-10-10 14:55:41   FMUSER RDS-A FM Broadcast RDS Encoder For Traffic Broadcasting DSP Concept and Effective Design       Overview FMUSER RDS-A Encoder is well suited for most regional, local, RSL, LPFM and other medium- ...
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Product Description

UPDATE:2019-10-10 14:55:41


FMUSER RDS-A FM Broadcast RDS Encoder For Traffic Broadcasting DSP Concept and Effective Design

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FMUSER RDS-A Encoder is well suited for most regional, local, RSL, LPFM and other medium- and small-coverage radio stations which use Ethernet for dynamic RDS data distribution. Built-in Ethernet controller supports multiple TCP/UDP ports, internet functions and remote monitoring .

FMUSER RDS-A Encoder have Fully DSP concept and effective design ensures high reliability, excellent signal characteristics and gives the user many advanced features while maintaining low acquisition costs.



l  Fully dynamic FM broadcast RDS encoder with up to four independent communication ports

l  USB connectivity for local settings and maintenance purposes

l  Ethernet connectivity for linking with broadcast automation system

l  Control interface based on ASCII commands and UECP protocol

l  Supports internet functions and remote monitoring

l  Text features include dynamic PS, parsing, scrolling, tagging, fixed messages, scheduling and HTTP reading

l  Excellent compatibility with broadcast automation systems

l  Control software includes powerful Windows GUI application

l  Supports control from external PHP/ASP scripts

l  Easy and fast set-up

l  Excellent spectral purity, direct digital RDS signal synthesis; compliant with EN 50067 / EN 62106

l  Two switchable program sets (with optional DSN and PSN setting)

l  External TA and Program set switch

l  Bypass relay, high reliability

l  Switchable MPX loopthrough mode (Loop/Side)

l  Internal real-time clock incl. backup battery

l  No special 19 kHz input needed – pilot tone internally recovered from MPX signal using digital PLL

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Frequency Question (FAQ)

  1. 1.      What is Radio broadcast data systemRDS

Radio Data System (RDS) is a standard for helping people insert some data information in a  FM radio broadcasts station.

RDS transmitted including timestation identification and program information.

The standard began as a project of the European Broadcasting Union (EBU).

  1. 2.      Why you need to build fm radio station with rds?

RDS provides a digital channel for ordinary FM radio stations, allowing the radio to provide users with more features, including the following illustrations:

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For more information on RDS features, here’s an introduction to Wikipedia:

The most important features is AF, TA, TP, it help FM radio station do more…

a)     RDS Traffic Announcement (TA) :

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The severing of the increased busy traffic, it is now interested in various countries in Africa to insert RDS signals when constructing a transmitting station, so as to realize the most economical broadcast of some traffic information by means of coverage of FM signals.

b)     Traffic Program (TP):

With the TA and TP functions of RDS, RDS helps radio in-vehicle users to obtain traffic information faster, reduce congestion in the city, and increase the listening rate of the radio station.

c)     Alternative Frequency(AF):

RDS AF help drivers automatic frequency switching between the Relay stations.

Inserting the RDS signal in the transmitter can also automatically switch between multiple different frequency broadcasts in the same program. The receiver automatically switches the substitute frequency AF by detecting the PI code in the RDS signal to ensure that multiple relay stations are passed. Broadcast stations that achieve nationwide coverage achieve seamless coverage and seamless listening. When the car passes the signal superposition zone between the two frequencies, the AF function of the RDS will automatically switch to the same program at different frequencies.

  1. 3.      How is the RDS Alternative Frequency (AF) work?

Here is a video about ow the RDS AF replacement frequency works on youtube.

  1. 4.      What is needed to build an RDS broadcast?

A: A RDS Fm radio transmitter equipment kit list:

1)      FMUSER RDS-A encoder

2)      FMUSER FSN-1000W Fm transmitter with 57khz

3)      RDS encoding software

4)      Cable and antenna

  1. 5.      How can I build my rds channel on my Existing transmitter system?

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1)      Confirm whether the current transmitter already has a 57khz input interface.

2)      Purchase FMUSER’s RDS-A encoder to insert your digital signal into your radio broadcast.

3)      Run the Rds software on your computer and insert your radio station logo, traffic information…

4)      Use a RDS radio to check the digital information you provide.

  1. 6.      Do I need to pay for your RDS software at an additional cost?

No, You just need to purchase FMUSER RDS-A encoder and FSN series transmitter, we provide RDS software for free.

  1. 7.      What is the different between RDS fm radio station and general radio on the radio?

The following three images illustrate how RDS can be used on an FM radio station; the latter two were taken when the radio was tuned to Nottingham radio station Trent FM. All the images are of the display on the SonyXDR-S1 DAB/FM/MW/LW portable radio.

 Fmuser-Rds-A-Encoder-Radio-Station-Transmitter (8)

  1. 8.      What are the characteristics of the FMUSER RDS-A encoder, and what is the difference compared to innovonics RDS encoder?

Innovonics RDS encoder is a good products , The biggest difference should be the same function, and we offer more economical encoders.

Let’s look the the characteristics:

Technical Specifications

Parameter Condition Value
Supply voltage 12 V DC stabilized
Supply current 280 mA
Signal connectors unbalanced BNC
Data connectors 1x USB (port 1), 1x Ethernet (port 2, 3, 4)
Network protocols supported HTTP, SNTP, TCP, UDP, DHCP, DNS, SNMP
USB speed software switchable 1200, 2400, 4800, 9600, 19200 bps
USB Mode 1 stop bit, 8 data bits, no parity, (no flow control),

ASCII or UECP (SPB 490)TA switching software or external switchTA/EON1TA input TTL with 10 kΩ pull-up, level or falling edge activatedProgram sets 2Program set switching ASCII command, UECP command or external switchProgram switch input TTL with 10 kΩ pull-up, level controlledRDS Services supported



RDS signalSubcarrier frequency 57 kHzBandwidth ± 2.4 kHz (50 dBc)Output level adjust 0.0 to 4.0 V p-p in 256 stepsPhase shift adjuststereo transmissionFull range, in 9.5 deg. steps

Audio/MPX/Pilot inputRecommended load impedancemono< 10 kΩstereo MPX< 2 kΩRecommended MPX voltage 1.3 – 8.0 V p-pPassthrough voltage gain2 Hz – 100 kHz1 (0 dB)Pilot tone level min. 120 mV p-p

– recommended FM deviation

 6.8 kHzPilot PLL capture range 8 HzStereo encoder pilot frequency requiredstereo transmission19000 Hz ± 2 Hz

OutputOutput impedance 100 ΩRecommended load impedance > 70 Ω, < 1 nF, no DC offsetMax. output voltage (RDS + MPX) 9.0 V p-pRecommended RDS level 3 – 11 % of MPX

Appearance and Illustration

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12V DC

Power supply connector. See section 3.3 for details.



Ethernet RJ-45 connector.

Use a standard (direct) cat 5 Ethernet cable for connection to the Ethernet switch, router or wall-socket.

The Ethernet control includes internal website (referenced as “Port 2”) and two independent user configurable general purpose ports (referenced as “Port 3” and “Port 4”) designated for remote control via TCP or UDP protocol.

The encoder operates also with no cable connected.


USB standard B type connector. This port is referenced as “Port 1”.

Use the USB for initial setup of the encoder or for its local control.

The encoder operates also with no cable connected.

4 Output BNC

RDS signal output to transmitter, modulated at 57 kHz subcarrier.

If the Loop/Side switch is set to the LOOP position, the Output is a sum of the RDS signal and the signal fed to the Input BNC connector.

5 Input BNC

Optional input for synchronization to the pilot tone or for mixing the RDS signal with existing modulation signal.

6 Loop/SIDE

Allows the input signal to be added to the output signal.


Optional logical inputs for direct control of some RDS services (TA, PROGRAM).

The connector is a standard 6-pin PS/2 type.

Packing List

  1. 1pcs FMUSER RDS-A Encoder
  2. 1pcs USB Cable
  3. 2pcs BNC Cable
  4. 1pcs 12V 2A Power supply

Order Guide

The FMUSER RDS-A is suitable for working with:






FSN5 1500W

More models are being adapted, please ask our staff if your model is suitable for use.

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So, FMUSER RDS-A Encoder provides you with a solution to increase the radio station’s listening rate, making it easier for you to send messages to the user’s radio while operating the radio station.


Act now, there is currently a discount:


Now Buy FSN5 Series Transmitter, You will get a 50% discount on FMUSER RDS-A Encoder.

The FMUSER RDS-A encoder official price is 600USD, and the 50% discount price is 300USD(It is only applicable if purchase one FSN series transmitter and get a RDS-A encoder 50% discount).


There is no better time than now, BUY IT NOW


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