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1kW Professional FM Radio Transmitter

STEREO WITH AUDIO PROCESSING OPTION
DYNAMIC RDS OPTION
48VDC or 90-260VAC OPTION
USB 192 KHz 24 bit OPTION
INCLUDES SHIPPING
5 YEAR WARRANTY
EXCEEDS CE/FCC TECHNICAL SPECIFICATION

5 YEARS
LIMITED WARRANTY MORE INFORMATION

If you need big distance or just sheer brute power to penetrate concrete and steel in a large city, this is the one. As ever, we have tried to make installation and power up as easy as possible. For the Stereo with Audio Processing and RDS version all you need is a quality mixer (and great radio presenters). Just connect the output of the mixer directly the gold plated RCA inputs on the back panel of the driver. Connect the transmitter 1000W output to a suitable 50 ohm antenna that can handle 1000W. That's it!! switch on, if you don't see any reflected power on the front panel, you are broadcasting serious power and serious distance.

Which Version Do You Need?

These are the two main versions of this transmitter:

◼ Stereo with RDS and Audio Processing Version

◼ MPX Version

These two versions cover 90% of all customer requirements. Other custom versions are available such as stereo only, no RDS, no processing etc. which we can also make if that's what you require.

You will find these two main versions shown in detail in the two following sections with descriptions of what they do and how they work. You should also see the price, INCLUDING delivery, to your country.

If you are still unsure, you are always welcome to contact us at em: info@aareff.com or ws: +1 829 6980733 and we're more than happy to advise you.

Stereo, RDS and Audio Processing Version

If you are not sure which version you want, then you definitely need this version. It is perfect for beginners because it adjusts the audio levels automatically and keeps the 1000 watt transmitter within the legal specifications required by the state regulator.

This version is also ideal for professionals who just don't need the all the hassle. This is because it includes everything in one enclosure. The audio processing keeps the audio level 'LOUD', but not too loud whereby it causes over deviation and contravenes your permit. The trick is to get the sound as loud as possible so you can compete with the other stations on the dial, but at the same time keeping your signal legal. This is a tricky balance to maintain, but this version in stereo with our internal audio processers does exactly this.

1kW Professional FM Radio Transmitter Stereo Audio and Processing

In addition, this version INCLUDES RDS. This allows everybody to see your station name and more scrolling across the car radio display.

The RDS is not just ordinary RDS, it is fully programmable dynamic RDS. This means the transmitter can be connected to a PC by a USB cable. The transmitters RDS circuit will pick the Artist and Song name from any folder on the PC disk drive. This folder is easy to set up in the DJ playout software, like Zara Studio etc. You can find more information about this in the Aareff RDS User Manual.

MPX Input

We have this version available for Users with experience that prefer straight raw MPX input.

Low frequency audio response is the holy grail for multiband audio processors, they need it.

As you can see from the image, the 160Hz square wave is very square with no tilting making it perfect for use with Orban, Inovonics, Omnia, Stereo Tool and other commercial audio processors.

1kW Professional FM Radio Transmitter MPX 160Hz Tilt Test with MPX Tool

Antennas

The transmitter will work with any 50 ohm antenna rated at 1000W or higher. Suitable antennas that we sell for this unit are:

    • Vertical 5/8 Wave
    • 4 Way Stacked Dipole
    • 8 Way Stacked Dipole
    • Circular Dipole
    • Folded Dipole

Our 2.5kW, 5kW and 10kW EIRP packages include this transmitter packaged in with coaxial cable and a suitable antennas. These full systems are engineered to comply with the EU standards and regulations for licensed broadcasting and most other countries regulations in the world.

Temperature Resilience

The power output of this model is 1kW continuous day and night non stop 24/7. It has reflected power protection and it has over temperature protection. In the event of any of these protections being activated, the power will reduce to a safe level to prevent any damage. When the fault that triggered the protections clears, the power restores automatically back to full.

VSWR Resilience

The final output section of this model uses a BLF188XR, they say the XR means 'eXtremely Rugged' This LDMOS RF power transistor is designed for the toughest engineering environments and is capable of withstanding a severe load mismatch with VSWR greater than 65:1 at 5 dB of compression. The BLF188XR is actually capable of providing an outstanding 1600 W of peak output power and still pass extreme ruggedness testing. For ultra reliability we just run it at 1kW maximum. It can be set at lower power levels, right down to 10W if required.

Construction

The complete 1kW transmitter is made up of one 3U enclosure and one 2U enclosure in strong 16-gauge steel, powder coated and baked in satin black. This type of metalwork can withstand the middle of a warzone and is military grade. The powder coating gives a difficult to scratch surface preventing the bare metal being exposed and corrosion. The front panels are standard 19 inches for standard racks.

Configuring Power, Dev. and Freq.

This transmitter is fully adjustable by a competent engineer to operate from 87.5 to 108 MHz, in 100 KHz steps, pre-emphasis of 50 or 75uS and adjustable power from 2 to 1000W. Like all our transmitters, this is easily done by reconfiguring the dip switches on the under side panel. When we test this we have to set it to some frequency, we prefer it to be the one you choose, so please let us know your frequency.

Compliance

The stereo version with audio processing and limiting meets all the regulatory standards required out of the box and pre configured. In fact if you send us a copy of your permit and it's conditions, we will set it up exactly to the specification. This equipment complies with EU/CE harmonised standards and FCC technical requirements for FM broadcasting. More information HERE

User Manual

RF Specification

All stated measurements were made at 220VAC at 27 Deg. Celsius ambient temperature unless stated.

Power Output	Adj. 1-1000 Watts into 50 ohms
Spurious Emissions	Less than -75 dB ref to carrier
Harmonic Emissions	Less than -70 dB ref to carrier
Freq Stability	+/- 1 KHz max. typ. +/-300 Hz
Deviation Sensitivity Stability	+/-2 % max
Freq Fine Adj	> +/- 1000 Hz
Freq Range	87.5 to 108 MHz in 100 KHz steps
Out of Lock RF Muting	Less than -70 dB ref to carrier
Residual AM	Less than 0.5 %
Synchronous AM	Less than 0.5 %
RF Ruggedness	Any VSWR phase or length of time
Output Connector	DIN-716
Operating Temp	-20 to +40 Deg C

AF Specification

Pre-emphasis	(50 uS/ 75 uS/ None) Selectable
Audio Input Connector	Phono/ RCA type unbalanced sockets
Audio Input Sensitivity	+4 dBu for +/- 75 KHz dev.

Version	MPX	Stereo and Audio Processor
Signal To Noise Ratio	80dB	65dB
Frequency Response	30Hz-76KHz	30Hz-15KHz
Audio Distortion	0.2% THD Max	0.2% THD Max (at MPX section)

AC Specification

Input Voltage	90-264 V AC 135-370 V DC 47-63 Hz
Input Power	1400W for 1000W RF OUT with RF SWR less than 1.5
Working Humidity	20-90% RH non-condensing
Safety Standards	UL60950-1 TUV EN60950-1 BSMI CNS14336 CCC GB4943 J60950-1 approved
EMC Emission	Compliance to EN55022 class B EN61000-3-2 3 FCC PART 15 / CISPR22 class B CNS13438 class B GB17625.1
EMC Immunity	Compliance to EN61000-4-2 3 4 5 6 8 11 light industry level criteria A

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