MKRT-D series (High Power) FM Transmitters

The marKoni High Power Line is definitely the top-class equipment manufactured by Telsat.

These transmitters provide brilliant performances using a simple and reliable architecture to reach very high power levels, by connecting in parallel 3KW or 5KW modules.
Each of these modules is completely independent, so it can be used in standalone in emergencies or for network reconfigurations.

The use of high-performance heatsinks and the high efficiency of active devices allows a remarkable weight decrease, making transport, installation and management simpler. Effective software algorithms protect the equipment from any cause of breakdown.
The output power is dynamically decreased to conservative values in case of environmental overheating, or reflected power from the antenna system.

The internal combiners loads are dimensioned to work indefinitely, even in unbalancing conditions thus ensuring a continuous service, without signal interruptions.



  • Crystal Digital Sound purity
  • Fully Digital Signal Processing
  • Embedded RDS generator
  • Single-chip Digital Processing guarantees maximum compactness


  • Internal 32-bit Digital Signal Processing
  • Unbeatable price/performance ratio
  • Lifetime upgradeable firmware
  • Fully remotely controllable by Web/SNMP interface


  • Auto-calibration at power-on
  • Absolutely no analogue trimming points
  • Minimum BOM, maximum long-term reliability
  • 1pps and 10MHz inputs for Synchro FM Operation

Master Control Unit

The Master Control Unit of the transmitters oversees all the general parameters of each individual component (exciters, change over systems, amplifiers, etc.), maintaining the same management characteristics of the marKoni low and medium power lines, granting an important uniformity, which delivers to the Users the maximum comfort and familiarity with all the marKoni products.

Through the very User's friendly touch screen interface it is possible to check or change the complete system parameters. All these information can be also managed remotely by the network interface on the back panel, otherwise even locally by using the Ethernet connector on the front panel.

In the Dual Driver configuration the Master Control Unit directly manages the Exciters, the coaxial switch and distributes the base band signal.

marKoni SERIES the future is here!
Digital Signal Processing

The extensive use of high-level Digital Signal Processing gives to marKoni unique features in the audio broadcasting world.
The native AES/EBU input module guarantees pure digital quality avoiding the conversion from an analogue source. The presence of the traditional L+R input assures as well top performances even with standard analogue audio.

The FM modulation is implemented by an innovative direct-RF synthesis algorithm with sub-Hz accuracy onto an FPGA-based digital processing core.
The result is a frequency-agile transmitter with immediate installation procedure, which allows operators to broadcast their audio content with excellent purity and maximum reliability.

Single Frequency Network

marKoni transmitters can be locked to the GPS time/ frequency reference signal for exact carrier allocation and Synchro FM operation, a promising band-efficient method of operating adjacent FM transmitters on the same RF frequency, after aligning all the RF and audio parameters of the transmission.

The result is a clearly improved listener's reception in the overlapping signal area, extending the coverage to shadow areas, normally characterized by inter-channel interference.

A typical application of this iso-frequency approach is the coverage of branches of highways, allowing car radio receivers to keep tuning the same carrier while driving, without the annoying effect of black spots along the road.

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marKoni is a synonymous of environmental sustainability
(over 90% of the construction materials are recyclable).
marKoni is certified for RED Directive.
Soft Limiter and Fully Options

The pure digital audio sensation that marKoni creates is obtained thanks to a revolutionary Soft Limiter, which avoids audio intermodulation peaks, while safeguarding the integrity of the whole input dynamic range, with the use of accurate signal processing that allows high full-band stereo separation and extreme signal-to-noise ratio.

The units come with a full-option outfit: analogue and digital audio, analogue MPX and additional wideband SCA and IP inputs, embedded RDS Generator and Digital Stereo Coder and Web/SNMP remote control.

User Interface
Technical characteristics
FM Carrier generation NCO-based synthesis
FM Modulation Fully digital
Stereo Coder Fully digital, integrated
Input Audio Limiter Proprietary integrated Soft Limiter
Digital Processing Resolution Real-time internal 32-bit digital processing
RDS Generator Fully integrated
Monitoring Output Signals Fully digitally generated
Analog L/R Input Section
L/R Analogue Inputs 30Hz - 15KHz (integrated digital stereo coder)
0dBu nominal (adjustable from -12dBu to +12dBu)
L/R Analogue Inputs Impedance 600Ω / 10kΩ balanced/unbalanced
Analog MPX and SCA Input Section
Analogue MPX Input 30Hz - 100kHz 0dBu nominal
MPX Analogue Inputs 10 kΩ unbalanced
Impedance SCA1/SCA2 40 kHz - 100 kHz 2Vpp nominal for ±7.5kHz deviation
Inputs SCA1/SCA2 Analogue Inputs Impedance 10 kΩ unbalanced
Digital L/R Input Section
Digital Audio Input AES/EBU (XLR Female), S/PDIF (BNC)
Balanced AES/EBU Input Impedance 110 Ω
Unbalanced S/PIDIF Input Impedance 75 Ω
Audio Delay
Audio Input Delay (all audio inputs) 0-4 µs, step 1 µs
RF Output Frequency (FM / OIRT bands) 87.5MHz-108MHz step 1Hz, ±1 ppm frequency stability / OIRT on request
Output Level 10kW, 20kW and 40kW
Output Interface / Impedance EIA 1"+5/8 Flange type (10kW), EIA 3"+1/8 Flange type (20kW), EIA 4"+1/2 Flange type (40kW)/ 50 Ohm
Pilot Carrier frequency 19kHz ±0.001Hz
Pilot Carrier level 0-12% modulation in 0.1% steps
Pilot Carrier Output 1Vpp digitally synthesized
MPX Analogue OutputOdBu from integrated digital stereo coder
19kHz and 38kHz Tone Suppression < -63dB
THD (30Hz-15kHz)+N < 0.1%
Synchronous AM Better than -60dB
Asynchronous AM Better than -70dB
Mono SNR RMS Better than -85dB
Stereo SNR RMS Better than -80dB
L/R and R/L Crosstalk > 50dB (60dB typ.)
M/S and S/M Crosstalk > 45dB full-band
Pilot Carrier Phase User adjustable (step <1°)
Frequency Deviation Range User adjustable 0 to ±200 kHz
Pre-emphasis Flat, 50µs or 75µs
Physical Case 19" - 1 x 24U (10kW), 1 x 42U (20kW), 2 x 42U (40kW)
Remote Control Port RS232/RS485
Remote Control Options PSTN, GSM (optional), Ethernet, SNMP
Front Panel User Interface LCD full color touch screen display
Power Supply Voltage High power, 400V, ±15%
Typical Efficiency at 98MHz 70%
Operating Temperature 0 - 45°C
- N+1 Redundancy configurations available from 1+1 to 4+1 (expandable)

Specifications, characteristics and front panel are subject to change without notice
Markoni MKRT-D
Markoni MKRT-D
User and Technical Manual

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TV Links


The Neetra TV Microwave Link is a system com- posed by MWT-AV Transmitter and MWR-AV

It is developed for point-to-point fixed radio link of high quality TV signals.
It operates in the microwave band with FM carrier and broadcasting capability of one Video signal and up to four Audio signals (only one without '3 Additional Audio' option). The transmission band can be chosen among 1GHz, 2GHz, 3.5GHz, 7.5GHz, 8.5GHz, 10GHz and 14GHz. Other bands are available on request with a maximum bandwidth of 400MHz.
The System respects the CCIR rules, imposing an Intermediate Frequency of 70MHz.
The MWT-AV Transmitter is an Indoor unit that contains Modulator, two up-converters and RF Amplifier. The MWR-AV Transmitter is an Indoor unit that contains one down-converter to 70MHz and demodulator. Both Transmitter and Receiver units can be split into two section: the indoor unit and the aerial head.
The modular design allows great flexibility and easy access for maintenance. The cabinet is pre-set for 19” rack mounting with height of 3 units.
It can operate with power supply by electrical 
network or 36Vdc (TX) - 24Vdc (RX) external battery.