DTV-80 Series High-Power Liquid-Cooled Digital VHF TV Transmitter Embodying a commitment to quality and eco-friendliness NEC Corporation http://www.nec.com/global/prod/nw/broadcast/ The new power in Digital TV Broadcasting Built on a solid foundation of experience NEC transmitters are known throughout the broadcast community for their high reliability and minimal maintenance requirements. NEC's latest DTV-80 series is based on technology accumulated in many years through broad experience and rich supply record and as well feedback from our users. Variety of new technologies and useful functions to enhance user's operations and services are provided,including stable operating wideband power amplifiers, digital linear correctors to reduce distortion and expand service area. The DTV-80 is also ready to meet future requirements from users - by simply changing the exciter unit from DM-3000A to DM-4000A, the transmitter is ready for DVB-T2 broadcast. 2 DTV-80 Series High-Power Liquid-Cooled Digital VHF TV Transmitter Features Small Footprint Reduced maintenance costs The DTV-80 Series provides up to 8.7kW output power (average) by All DTV-80 series transmitters are produced from, and supported by, using 10 sets of PA units in a single rack, achieving a footprint of only one common set of modules, resulting in reduced costs from purchase 590 (W) x 2,000 (H) x 1,000 (D) mm, making it one of the smallest to installation and support. transmitter foot-prints in the world. Advanced cooling system High Efficiency With the adoption of Hybrid Closed System for cooling, there is the By adopting the latest MOS FET in the newly developed VA3000QE PA, advantage of excellent cooling liquid exchangeability and automatic the DTV-80 Series are able to achieve high efficiency, enabling to removal of air from the system when an amplifier is changed. reduce operation costs. Wide range of redundancy configuration User friendly monitoring and control To meet customer's ever increasing demands, the DTV-80 Series can The TX control unit of DTV-80 Series is controlled by PLD and thus able offer wide range of backup options such as redundancy only in the to quick boot as the UHF Digital TV Transmitters - DTU-52 Series. With liquid cooling system, redundant exciter, main/standby configuration it, users are able to monitor both operational status and log data and N+1 configurations. (including fault record), as well set the controls. For users who prefer better visual operation, an optional color LCD display is also available. The latest in digital broadcasting technology Power Amplifiers (PA) The newly developed VA3000QE power amplifier utilizes the latest high power LDMOS, realizing compact design, enhanced efficiency and producing excellent reliability. Each PA can produce an output power of 1kW average and incorporates a switching power supply. Furthermore, it features an optimized combination of wideband matching circuits and controls. In terms of safety features, the PA is incorporated with a RS-485 interface, enabling comprehensive monitoring and remote control functionality. With the added benefit of self-protection circuits against external factors such as high temperature, reflected power, low AC voltage and internal factors such as overvoltage and over current. Additionally, the PA is equipped with RF over input protection, which has a function of protecting the PA against excessive output power produced from the exciter due to human mis-operation and from the excessive input power in case there is malfunction in the divider. VA3000QE 3 Exciter The compact DM-3000 Series Digital Exciter is packed with NEC's state-of-the-art technology. A synthesizer tuned to VHF Band III signals enables direct conversion to a RF output. Higher or lower bit rates are modified to usable bit rates for flexible bit-rate adaptability. Using the MIP created by the SFN adapter, seamless ASI switching can be performed. A truly impressive characteristics of the DM-3000 Series Digital Exciter is the ability to work in conjunction with other NEC transmitters as a signal processor - which greatly reduces the necessity for spare units while simplifying maintenance. By changing the exciter to NEC's DM-4000A Digital Exciter, the DTV-80 Series is able to broadcast in DVB-T2. DM-3000 Functionality Benefits Adaptive Digital Corrector (ADC) The ADC 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 comes integrated in the DM-3000 Series Digital Exciters and can be used to generate the correction factor for preset correction. Furthermore, the ADC is capable of analyzing feedback signals from the TX output, including inter-modulation level, MER value and other graphical data. Automatic adjustment of the IMP/MER values greatly reduces the time required for maintenance. N+1 System The DTV-80 Series frequency-agile design, allows for the construction of an N+1 system, offering redundancy for maximized reliability and transmission time. By using N+1 controller, up to 8+1 system are available. At any given time, 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 the broadcast signals. 4 DTV-80 Series High-Power Liquid-Cooled Digital VHF TV Transmitter Liquid Cooling The liquid cooling system incorporates an automatic air-purge function Liquid Cooling System (single with redundancy) and an Adaptive Fault Forecast function. These failures work together Heat Exchanger to cut noise and installation costs, making the maintenance easier and boosting reliability. Coolant feeding and dust removal have been greatly simplified by a hybrid closed circuit, ensuring the coolant remains clean. There are two types of cooling systems that can be selected from the M M M (Reserve fan) transmitter models. “S Type” comes with single drive and single pump and heat exchanger. TX Control Pump Pump Rack PA / PS Pump PA / PS exchangers. PA / PS Tank PA / PS “P Type” comes with dual drive and redundant pumps and heat Transmitter Optional Color LCD A color LCD screen can be selected as option, which features an intuitive GUI (Graphical User Interface), making transmitter control, monitoring and maintenance extremely easy to perform. The log data not only displays changes in operational status, including faults, but also enables verification of related data in case of system failure, thereby streamlining analysis of abnormal status. Frequency setting can be conducted at the touch of a button on the color LCD screen. Remote Control/Monitoring The DTV-80 Series incorporates a web server and SNMP agent, enabling the transmitter to be conducted to a local area network for monitoring and control of transmitter operations via a remote PC with a web browser. Whilst also allowing a SNMP manager to monitor and control from a different location at the same time. Thus, provide a cost-efficient maintenance, whilst the transmitter is in operation and without the requirement of expensive measurement equipment. TCP/IP PC IP Network Sample View of Signal Quality Monitoring DTV-80 Series Transmitter 5 Configuration of DTV-80 (Liquid-cooled) Series DTV-80 Series Lineup DTV-80/ 1 2 3 1 2 : Output Power Type 1R8 2R7 3R6 4R4 5R3 6R2 7R0 7R8 8R7 : System Type S : Single Transmitter with Single Drive P : Single Transmitter with Dual Drive and Multiple PAs Output Power 1.8kW 2.7kW 3.6kW 4.4kW 5.3kW 6.2kW 7.0kW 7.8kW 8.7kW 3 : Cooling Type (S)Q : Single liquid cooling system (P)Q : Redundant liquid cooling system Transmitter Standard Configuration S Type Exciter Local OSC Adaptive Digital Corrector RF Converter PA 1 PS PA 2 PA n External Reference Input Control Remote Control/ SYS.CONT AC Input n-Combiner OFDM Encoding n-Divider TS Input 1 TS Input 2 BPF (Option) Output Status Pump Rack & H.EXC TX CONT LCD Display (option) P Type PS External Reference Input TS Input 1 TS Input 2 RF Converter PA 1 PA n 6 BPF (Option) Exciter 2 Control Remote Control/ SYS.CONT AC Input PA 2 n-Combiner Local OSC Exciter 1 Adaptive Digital Corrector Exciter Switch OFDM Encoding n-Divider TS Input 1 TS Input 2 Status TX CONT LCD Display (option) Pump Rack & H.EXC Output DTV-80 Series High-Power Liquid-Cooled Digital VHF TV Transmitter Transmitter Standard Configuration Table Output power [kW] 1.8kW 2.7kW 3.6kW 4.4kW 5.3kW 6.2kW 7.0kW 7.8kW 8.7kW Equipment Composition [Sets] Transmitter Model Name Exciter Exciter Switch 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 1 1 1 1 1 1 1 1 DTV-80/1R8SQ DTV-80/1R8PQ DTV-80/2R8SQ DTV-80/2R8PQ DTV-80/3R6SQ DTV-80/3R6PQ DTV-80/4R4SQ DTV-80/4R4PQ DTV-80/5R3SQ DTV-80/5R3PQ DTV-80/6R2SQ DTV-80/6R2PQ DTV-80/7R0SQ DTV-80/7R0PQ DTV-80/7R8SQ DTV-80/7R8PQ DTV-80/8R7SQ DTV-80/8R7PQ PA 2 3 4 5 6 7 8 9 10 Divider/Combiner Rack Size (mm) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 590 (W) x 2,000 (H) x 1,000 (D) DTV-80 Series Specifications Specification DVB-T/T2 Output Power 1.8kW - 8.7kW (measured before mask filter output) Output Frequency Power Supply Voltage Voltage Fluctuation Power Supply Frequency Frequency Stability Amplitude -frequency Response Bandwidth 170 - 230 MHz(Band III) 3 x 380/400/415 V, or 3 x 208/230 V -15%, +10% 50/60Hz ± 2% ±1.0 x 10-7 over a period of 1 year with internal reference ±0.5dB(excluding BPF) 6MHz, 7MHz, 8MHZ Intermodulation Products < -36dB MER (Modulation Error Ratio) > 32dB Spurious Emission Ambient Temperature Range ɘ-60dBc Indoors: 0˚C to +45˚C Outdoors: 0˚C to +45˚C or -30˚C to +40˚C (using antifreeze and 3-way valve system) Relative Humidity ɘ90% (no condensation) 7 DTV-80 Series High-Power Liquid-Cooled Digital VHF TV Transmitter Safety precautions To install, make connections and operate this product, please carefully read and observe instructions, precautions and recommendations in our instruction manuals. The colours in this brochure may differ from those of the actual unit. Designs and specifications of this product is subject to change without prior notice. NEC Corporation Americas and EMEA Sales Division Greater China and Asia Pacific Sales Division Broadcast and Video Systems 7-1, Shiba 5-chome, Minato-ku, Tokyo, 108-8001, Japan Tel: +81-3-3798-5463 Fax: +81-3-3798-8476 NEC Europe Ltd. Network Solutions Division NEC House, 1 Victoria Road, London W3 6BL, United Kingdom Tel: +44-(0)20-8993-8111 Fax: +44-(0)20-8752-3735 © 2011 NEC Corporation. NEC and the NEC logo are registered trademarks of NEC Corporation. NEC Asia Pacific Pte. Ltd. NEC Latin America S.A. No. 1 Maritime Square #12-10 HarbourFront Centre Singapore 099253 Tel: +65 6278 1818 Fax: +65 6271 2088 Av. Paulista, 2.300 01310-300 Sao Paulo, SP Tel: +55 (0) 11-3151-7000 Fax: +55 (0) 11-3151-7218 Cat.No. H01-11080004E