DTU-52 Series. High-Power Digital TV Transmitter. Features

Transcription

1 DTU-52 Series High-Power Digital TV Transmitter Features Small footprint (W) x 2,000 (H) x 1,000 (D)mm for 8.7kW High efficiency - Excellent broadband matching circuit at amplifier modules New TRPA -UA4000QE- - Using the latest high-power LDMOS - Output power of TRPA is 1kW average and/or 2kW at sync peak 1st Edition

2 NEC leads the digital TV broadcasting industry around the world NEC is a leading global company which offers world-class know-how and resources in the technology of broadcasting networks. Our newest model of digital TV transmitter The continued evolution and integration of broadcast technology led us to develop a new high-power Transistor Power Amplifier (TRPA) designated UA4000QE which our new high-power digital TV transmitter, the DTU-52 series, utilizes. DTU kW Model DTU-52/8R7PQ The DTU-52 series inherits the technologies and performance of previous model DTU-51, which has been highly evaluated in the field widely, and adds innovative new technology. This realizes even higher reliability in a high-quality digital TV transmitter. Besides the two main features high reliability and low maintenance of our existing digital TV transmitters, we have successfully achieved two additional advantages high efficiency and a small footprint for this new DTU-52 series.

3 High efficiency By adopting this new TRPA, the DTU-52 series enables a reduction in power consumption by an average of 20 to 30% compared with previous models. Small footprint The DTU-52 series provides up to 8.7kW output power (average) by using 10 sets of TRPA units in a single rack, achieving a footprint of only 590 (W) x 2,000 (H) x 1,000 (D)mm, one of the smallest in the world. The latest in digital broadcasting technology Power Amplifiers (PA) Our newly developed high-power TRPA, the UA4000QE, utilizes the latest high-power LDMOS. The output power of this TRPA is 1kW average. It features an excellent broadband matching circuit in the amplifier modules. Size 479 (W) x 105 (H) x 630 (D)mm Internal power supply Can easily be replaced during operation Monitoring and remote control The compact PA modules each incorporate an RS-485 interface, enabling comprehensive monitoring and remote control. Furthermore, self-protection circuits for high temperature, reflected power, overvoltage, overcurrent and low AC voltage are built-in. UA4000QE Wideband design covers entire UHF band Frequency-agile, so no channel-specific components are necessary.

4 Exciter The DM-3000A digital exciter is packed with NEC s state-of-the-art technologies. The integration of numerous functions into a single unit greatly reduces size and cost. A synthesizer tuned to all UHFband signals enables all-band direct conversion to an RF output. Higher or lower bit rates are modified to usable bit rates for flexible bit-rate adaptability. Using the MIR created by the SFN adapter, seamless ASI switching can be performed. The truly impressive characteristic of the DM-3000A is its ability to work in conjunction with other NEC transmitters as a signal processor this greatly reduces the necessity for spare units while simplifying maintenance. DM-3000A Adaptive Digital Corrector (ADC) (optional) The ADC board automatically generates correction factors of non-linearity distortion and updates the correction table without interrupting program service. Optimum signal quality and service coverage are maintained, protected from the effects of ambient temperature, aging and other factors. The ADC board is installable from the front of the exciter and can be used to generate the correction factor for preset correction. Furthermore, the ADC board is capable of analyzing feedback signals from the TX output, including intermodulation level, MER value and other graphical data. And automatic adjustment of the IMP/MER values greatly reduces the time required for maintenance. Removable ADC board (optional) N+1 System The Versatile III Series DTU-52 s frequency-agile design allows for the construction of an N+1 system, offering redundancy for maximized reliability and uptime. By using the newly developed N+1 controller, up to 8+1 system is available. At any given site, there is a transmitter ready to be activated should one of the active transmitters malfunction. When activated, the spare transmitter adjusts its frequency band accordingly without interfering with broadcast signals.

5 Liquid Cooling The liquid cooling system incorporates an automatic air-purge function, and an Adaptive Fault Forecast function. These features work together to cut noise and installation costs, make maintenance easier and boost reliability. Coolant feeding and dust removal have been greatly simplified by a hybrid closed circuit, ensuring the coolant remains clean. Liquid Cooling System (Single with redundancy) Fan 1 M Fan 2 Fan 3 M M Heat Exchanger Passive Reserve (Reserve) TS LS Water/ glycol Glycol Pump A PS TS PA PA PA FM Pump B Passive Reserve PA Pump Rack Transmitter FM: Flowmeter LS: Level Switch M: Motor PS: Pressure Switch TS: Thermal Switch Remote Control/Monitoring The easy-to-view color LCD screen located on the front of the rack features an intuitive GUI (Graphical User Interface), making transmitter control, monitoring and maintenance extremely easy to perform. For monitoring and control capabilities of a single or multiple transmitters from different locations, NEC offers SNMP and Web server. PC IP Network TCP/IP Sample View of Signal Quality Monitoring DTU-52 Series Transmitter

6 Configuration of DTU-52 (Liquid-cooled) Series DTU-52 Series Lineup DTU-52/ : Output Power 2 Type Output Power R9 900W 1R8 1.8kW 2R7 2.7kW 3R6 3.6kW 4R4 4.4kW 5R3 5.3kW 6R2 6.2kW 7R0 7.0kW 7R8 7.8kW 8R7 8.7kW 10R0 10.0kW Transmitter Standard Configuration S Type : System Type S: Single Transmitter with Single Drive P: Single Transmitter with Dual Drive and Multiple PAs PE: Single Transmitter with Dual Drive and Single PA 3 : Cooling Type Q: Liquid Cooling TS Input 1 TS Input 2 External Reference Input Remote Control/ SYS.CONT AC Input Exciter OFDM Encoding Local OSC Adaptive Digital Corrector PS RF Converter TRPA 1 TRPA 2 TRPA n Control Status n-divider n-combiner LCD Display BPF (Option) Pump Rack & H.EXC Output P Type TS Input 1 TS Input 2 External Reference Input TS Input 1 TS Input 2 OFDM Encoding Local OSC Exciter 1 Adaptive Digital Corrector PS Exciter 2 RF Converter Exciter Switch n-divider TRPA 1 TRPA 2 TRPA n n-combiner BPF (Option) Output Remote Control/ SYS.CONT AC Input Control Status LCD Display Pump Rack & H.EXC Transmitter Standard Configuration Table Output Model Name Equipment Composition (Sets) Transmitter Exciter Exciter Switch PA Divider/Combiner TX Control Rack Size (mm) Weight 900W DTU-52/R9SQ DTU-52/R9PEQ kW DTU-52/1R8SQ DTU-52/1R8PQ kW DTU-52/2R7SQ DTU-52/2R7PQ kW DTU-52/3R6SQ DTU-52/3R6PQ kW DTU-52/4R4SQ DTU-52/4R4PQ (W) x 2,000(H) x 1,000(D) 5.3kW DTU-52/5R3SQ DTU-52/5R3PQ kW DTU-52/6R2SQ DTU-52/6R2PQ kW DTU-52/7R0SQ DTU-52/7R0PQ kW DTU-52/7R8SQ DTU-52/7R8PQ kW DTU-52/8R7SQ DTU-52/8R7PQ kW DTU-52/10R0SQ , ,180(W) x 2,000(H) x 1,000(D) DTU-52/10R0PQ ,174

7 External View *Drawings are for P type. For S type, the exciter will be one set. DTU-52/R9PEQ DTU-52/1R8PQ DTU-52/2R7PQ DTU-52/3R6PQ DTU-52/4R4PQ DTU-52/5R3PQ DTU-52/6R2PQ DTU-52/7R0PQ DTU-52/7R8PQ DTU-52/8R7PQ DTU-52/10R0PQ

8 Specifications and Performance DTU-52 (Liquid-cooled) Series Specifications Output Power 900W ~ 10kW Output Frequency 470 ~ 862MHz (Band IV/V) Output Impedance 50Ω Input Signal DVB-ASI Power Supply Voltage 380/400/415V, 3-phase, 4-wire Voltage Fluctuation +10%, -15% Power Supply Frequency 50/60Hz±2% Ambient Temperature Indoors: 0 C ~ +45 C Outdoors: 0 C ~ +45 C or -30 C ~ +40 C (using antifreeze and 3-way valve system) Relative Humidity < = 90% (no condensation) Standard Performance Frequency Stability Amplitude-frequency Response Intermodulation Products MER (Modulation Error Ratio) Spurious < = ±1 X 10-7 (internal reference use) (it is also possible to lock to an external 10MHz reference) < = ±0.5dB (excluding BPF) < = -36dB > = 32dB < = -60dBc Specifications, designs, etc. are subject to change without notice. For further information, please contact: EC Australia Pty. Ltd. Broadcasting Systems Springvale Road, Mulgrave, Victoria 3170, Australia Tel: +61 (0) Fax: +61 (0) Cat. No. BBV064 1st KK Printed in Japan NEC Corporation 2008