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Transmission Transmission

AM Transmitters

X.DA-20

AM Digital Radio Transmitter

From: Continental Lensa

Features:
-Elevated Total Efficiency
-Excellent Audio Quality
-Protecciones Digitales
-Maximum RF Output Power: 26 KW
-Maximum Average Power: 30 KW

Efficiency greater than 93%, achieved through the use of Hexfet type power transistors in the design of the desalida circuits. The PWM modulation system and the intrinsically linear amplification circuits allow us to ensure a linear frequency response between 20 and 15,000 Hertz, with reduced distortion levels (less than 1%).

Solution represented by a DDS, integrated digital circuit, which directly synthesizes the desired frequency by programming it. This device is integrated in the control board, which is intended to accommodate two of these circuits and to change them automatically in case of failure of one of them (optional dual digital synthesizer).

In analog operation, thanks to the design of the main power source and the PWM circuits, our equipment is able to operate with modulations up to 150% at the positive peak, which translates into an excellent "volume on the dial". In hybrid operation, ie analog and digital simultaneously (IBOC), our equipment is capable of operating up to 125% modulation for the analog signal, considering a bandwidth of 8 KHz, plus digital modulation.

Solution represented by a DDS, integrated digital circuit, which directly synthesizes the desired frequency by programming it. This device is integrated in the control board, which is intended to accommodate two of these circuits and to change them automatically in case of failure of one of them (optional dual digital synthesizer).

Features:

-Audio Response
-+ / - 0.5 db between 20 and 15,000 Hz, based on 1000Hz and 95% modulation
-Total Harmonic Distortion
-Less than 1% between 20 and 15,000 Hz, at 95% modulation and nominal power
-Distortion by Intermodulation
-Less than 2% at nominal power and 85% modulation, with signals of 1,000 and 400 Hz in the ratio 1: 1
-Emission of Non-Essential Harmonics and Radiation Complies with FCC
-Electrical Power Consumption 22,000 VA or less, with 0% modulation
-Factor Power 0.9 or better
-Impedance Input (Audio) 600 Ohms balanced
-Audio Input Level + 10 dBm for 100% modulation.
-Adjustable between 0 and +12 dbm
-RF Impedance Impedance 50 Ohms Unbalanced
-Strap Output Connector or EIA connector on request
-Maximum RF Output Power: 26 KW
-Maximum Average Power: 30 KW
-Modulation Capacity:
-120% positive peak modulation: 26 KW
-130% peak positive modulation: 24 KW
-150% positive peak modulation: 20 KW
-Environment Power Supply Three-phase supply 220/380 VAC, 50/60 Hz