EM 250

PT. GIANT COMMUNICATION Menyediakan berbagai macam keperluan PEMANCAR TV, FM, AM, dan Antena Terlengkap dan TerPERCAYA Please ask for availability The EM 250 is a 250W FM transmitter made up of the EM 25 DIG or EM20/ 30 exciter and the AM 250 FM amplifier. This equipment includes a high-efficiency amplifier, LPF ( Low Pass Filter) and cyclical protections of: SWR, overdrive, over-consumption, over-power and temperature. The output power is externally adjustable between 0 and 250W.The EM 250 also incorporates a switching power supply that allows stable output power with input voltage from 90 to 260VAC. technical features AM 250 frequency range 87.5 ~ 108MHz operating class B input return loss 20dB input power 2 ~ 4W OUTPUT POWER 250W nominal power gain 19.2dB typical efficency 70% approx. cooling Air forced harmonic 60dB ( 75 KHz dev. and 400Hz) Pre-enphasis 50 or 75ms internally selectable RF output impedance 50W asymmetrical ( N Female Connector) audio/ stereo input connector BNC Female audio/ stereo input impedance High-Z. 2KW SCA channel input connectors BNC Female SCA channel input impedance High- Z. 2KW remote control interface serial RS-232 cooling Air forced ( axial blower) operating temperature range - 10 ~ + 45º C maximum relativa humidity 90% ( without condensation) AC power supply 110 ~ 240VAC, 47/ 63Hz Dimensions 2RU ( 19" rack) 410mm depth weight 4.8 Kg ( 10.56lbs) EM 250: AMPLIFIER + EXCITER CONSUMPTION 614VA DIMENSIONS 540 x 540 x 540mm weight 40 Kg ( 88lbs) EM 25 DIG S/ N RATIO BETWEEN 30Hz AND 15kHz > 78dB, typical 86dB S/ N RATIO ( AM ASYNCHRONOUS) > 55dB, typical > 60dB S/ N RATIO ( AM SYNCHRONOUS) > 50dB, typical > 55dB HARMONICS DISTORTION ( 75KHz deviaTion) < 0.05% , typical 0.02% HARMONICS DISTORTION ( 150KHz deviaTion) < 0.2% , typical 0.05% L/ R STEREO CHANNELS CROSSTALK < -50dB ( with external coder)