EM 2000

PT. GIANT COMMUNICATION Pusat segala perlengkapan pemancar TV, FM, dan AM TerLENGKAP dan TerPERCAYA kunjungi website : MARKASPEMANCAR CALL : Bpk. Permadi 0818 0800 5248 Sudah Bersertifikasi Please ask for availability EM 2000 is a 2000W FM transmitter made up of the EM 25 DIG exciter ( or EM 20/ 30 exciter) and the AM 2000 FM amplifier. AM 2000 includes eight 300W high-efficiency MOSFET technology amplifying modules, fed by 2 independent switching power supplies, which are made to withstand the working conditions. The amplifiying modules work independently thanks to a power combining structure that provides high isolation between them. The equipment includes a low-pass filter at the antenna output, EMI filters at the utility connection and an internal transient suppressor. The LCD display shows the amplifier main parameters: supply voltages, 8 module currents, direct, reflected and input power, power loss in the internal unbalance load and three temperature sensors. The amplifier control system stores in their memory all events and alarms detected, showing time and date of occurrence. Smart temperature protection: if temperature rises up to a level dangerous for the modules, the output power is reduced until the temperature goes back to a normal state. If, even with the power reduction, the temperature keeps on rising, then the amplifier is stopped until the temperature goes down. Reflected power protection ( load mismatch) : when the control system detects that the V.S.W.R. is dangerous for the modules, it reduces automatically their output power so as not to exceed the internal security level. Besides, there is a fast protection system that instantaneously turns off the modules polarization when it detects a peak on the reflected power sensor. Automatic gain control: it reduces the gain in the case of excessive driving power, keeping the adjusted output power despite temperature changes. The control allows manual power adjustment by means of the front keyboard. The amplifier includes Analog Telemetry ( Direct and Reflected power measure) , Digital RS-232 telemetry and remote control, Remote control through open-close contacts and a Multi-device bus connection for internal use. TECHNICAL SPECIFICATIONS AM 2000 FREQUENCY RANGE 87, 5 ~ 108MHz OPERATION CLASS B INPUT RETURN LOSS -20dB INPUT POWER 25W OUTPUT POWER 2000W nominal, manual and automatic adjustment power gain 19.2dB approx. typical RF efficiency 70% cooling Forced air harmonics level -80dBc input / output impedance 50W rf input connector N female rf output connector EIA 7/ 8' ' rf monitor connector BNC female supply 190 ~ 250VAC, 50/ 60Hz CONSUMption 3491, 28 VA; 23A RMS; Crest factor= 2.35 PROTECtions -Reflected, Forward power, overdrive, overcurrent in modules -Smart Temperature protection -Reflected power protection ( load mismatch) -PRFL automatic control + Fast protection -Automatic Gain Control -Real-time events register -Exciter inhibition TELEMETRY AND REMOTE CONTROL -Analog telemetry ( direct and reflected power measurement) -Telemetry and RS-232 digital remote control -Remote control by open / closed contacts -Multi-device bus WORKING TEMPERATURE -5 to + 40º C DIMENSIONS 6RU standard 19' ' Rack ( 628mm D) with no handles WEIGHT 40Kg ( 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) 65dB Ref. 100 % AM / 400Hz synchronous AM S/ N ratio > 60dB with FM / 75KHz / 400Hz Pre-EMphasis 50 or 75ms Internally selectable RF output impedance 50W asymmetrical N Female Connector MPX input connector ( main program) BNC Female stereo input impedance ( main program) High-Z 2KW SCA input connectors BNC Female SCA input impedance High-Z 2KW Remote control interface Serial RS-232 cooling Air forced ( Axial blower) operating temperature range - 10 ~ + 45º C maximum relative humidity 90% ( without condensation) AC power supply 110/ 240VAC, 47/ 63Hz Dimensions 2RU ( 19" rack) , 410mm depth weight 4.8Kg ( 10.56lbs) AMPLIF + EXCITER + RACK DIMENSIONS 540 x 660 x 610mm. ( 21.26 x 25.98 x 24.04 inches) WEIGHT 132Lbs ( 60kg)