Introduction:
FSN-150B V5.0 FM radio transmitter is highly reliable, lighter in weight and easier to operate than previous version of transmitter. This transmitter adopts a simple-style design concept. It integrates the 50W FM stereo transmitter exciter, power amplifier, output filter and switching power supply in a 1U high 19-inch standard case, reducing the connecting cables between the components.
Technical Features:
• User-friendly digital LCD panel, using one rotary knob to control.
• The integrated LCD screen displays all the parametric including: transmitter frequency, stereo and mono, volume, amplifier tube temperature, audio signal UV meter, forward power, reflected power, modulation mode, pre-emphasis etc,.
• 1U 19-inch thickened all-aluminium case, strong and excellent heat dissipation.
• Precise PLL frequency generation system, to ensure that the frequency not drift away for more than10 years, with built-in high-quality stereo encoder.
• Outstanding power AGC balance control system, adjustable power output from 0 to 150 watts, and automatic gain power control to maintain output power within set range without drifting.
• Signal input supports XLR and RCA audio inputs, and also SCA and RDS signals using the BNC connector AUX.
• The RF amplifier uses LDMOS transistors to withstand even severe load mismatch exceeding the 65: 1 VSWR at a 5dB compression point.
Technical Parameters:
Frequency: 87.5-108MHz
Frequency step value: 10KHz
Modulation method: FM, peak deviation ± 75KHz
Frequency stability: <± 100Hz
Frequency stabilization method: PLL frequency synthesizer
RF output power: 0 ~ 150 W, step 0.1W, error ± 0.5dB
Harmonic suppression: ≤-72dB
Inband residual wave: ≤-72dB
Asynchronous AM SNR: ≥-80dB (no modulation) ≥-65dB (400Hz, 100% modulation)
Synchronous AM SNR: ≥-70dB (no modulation) ≥-60dB (400Hz, 100% modulation)
RF output impedance: 50Ω
RF Output Connector: N Female (L16)
Audio Input Connectors: XLR Female and RCA Female
AUX input connector: BNC female
Pre-emphasis: 0us, 50us, 75us (user setting)
Mono signal to noise ratio: ≥ 80 dB (20 to 20KHz)
Stereo signal-to-noise ratio: ≥ 80 dB (30 to 15KHz)
Stereo resolution: ≥ -55dB
Audio frequency response: 30 ~ 15000Hz ± 0.4dB
Audio distortion: <0.1%
Audio level gain: -15dB ~ 15dB step 0.5dB
Audio input: -15dB ~ 0dB
Power supply voltage range: 110V ~ 260V (global voltage)
Power consumption: <320VA
Operating temperature range: -10 to 45 ℃
Way of working: continuous work
Cooling method: forced air cooling
Cooling method: <95%
Altitude: <4500M
Dimensions: 484 x 260 x 44 mm without handles and protrusions, 19 “1U standard rack.
Weight: 4Kg
FMUSER RDS-A RDS Encoder for
FM Transmitter with MPX SCA Input
Overview
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.
Features
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
Frequency Question (FAQ)
1. What is Radio broadcast data system（RDS）
Radio Data System (RDS) is a standard for helping people insert some data information in a FM radio broadcasts station.
RDS transmitted including time, station identification and program information.
The standard began as a project of the European Broadcasting Union (EBU).
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:
The most important features is AF, TA, TP, it help FM radio station do more…
a) RDS Traffic Announcement (TA) :
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.
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
5. How can I build my rds channel on my Existing transmitter system?
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.
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.
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
|
|
General
|
|
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 switch
|
|
TA/EON1TA input
|
|
TTL with 10 kΩ pull-up, level or falling edge activated
|
|
Program sets
|
|
2
|
|
Program set switching
|
|
ASCII command, UECP command or external switch
|
|
Program switch input
|
|
TTL with 10 kΩ pull-up, level controlled
|
|
RDS Services supported
|
PI, PS, PTY, TP, AF, TA, DI, M/S, PIN, RT, RT+
TMC, EON, PTYN, ECC, LIC, TDC, IH, CT, ODA
|
|
RDS signal
|
|
Subcarrier frequency
|
|
57 kHz
|
|
Bandwidth
|
|
± 2.4 kHz (50 dBc)
|
|
Output level adjust
|
|
0.0 to 4.0 V p-p in 256 steps
|
|
Phase shift adjust
|
stereo transmission
|
Full range, in 9.5 deg. steps
|
|
Audio/MPX/Pilot input
|
|
Recommended load impedance
|
mono
|
< 10 kΩ
|
|
stereo MPX
|
< 2 kΩ
|
|
Recommended MPX voltage
|
|
1.3 - 8.0 V p-p
|
|
Passthrough voltage gain
|
2 Hz - 100 kHz
|
1 (0 dB)
|
|
Pilot tone level
|
|
min. 120 mV p-p
|
|
- recommended FM deviation
|
|
6.8 kHz
|
|
Pilot PLL capture range
|
|
8 Hz
|
|
Stereo encoder pilot frequency required
|
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)
|
|
9.0 V p-p
|
|
Recommended RDS level
|
|
3 - 11 % of MPX
|
