UHF High Power Transmitters

Supports DVB-T/H and DVB-SH standardsLDMOS Power AmplifierOutput RF power 280, 500 and 1000 WattsIntegrated DVB-S/S2 ReceiverIntegrated GPS ReceiverUHF Up ConverterDigital PrecorrectionSFN supportRemotely manageable via SNMPOverviewUBS transmitters are designed to provide Digital Terrestrial Television Broadcasting service over the UHF frequency band from 470 MHz up to 860 MHz. The line of products includes three models ranging from 280 Watts up to 1000 Watts of digital RF output power - DTX2000U, DTX5000U and DTX9000U. The transmitter models differ from each other by the number of RF amplification modules. The DTX2000U employs one power amplifier module, the DTX5000U and DTX9000U correspondingly two and four power amplifier modules with appropriate power combiners.The transmitter performs conversion of the MPEG transport stream to COFDM modulated IF signal, converts this IF signal to the RF signal at selected transmit channel frequency within the UHF band and provides RF signal amplification up to required output power level. The power level stability at the transmitter RF output is maintained by internal automatic level control loop.The transmitter can be configured to support any one of the existing modulation standards, currently accepted for Digital TV Broadcasting: DVB-T/H and DVB-SH.The operation parameters of the Transmitter are monitored and controlled by embedded system controller. The Transmitter parameters monitoring and setting could be performed from the front panel display or using remote control interfaces (Ethernet, SNMP or RS232).With an optional integrated DVB-S/S2 Receiver/Demodulator module, the transmitter could be configured as a Terrestrial Repeater, which receives the input data stream from the satellite downlink and re-broadcasts this signal in COFDM format.All the Transmitter/Repeater system components are installed in a standard 19" rack cabinet intended for indoor operation. The transmitter components are cooled with the forced air.