User manual | DTU-52 Series High-Power Liquid-Cooled Digital UHF TV Transmitter and eco-friendliness

DTU-52 Series
High-Power Liquid-Cooled Digital UHF TV Transmitter
Embodying a commitment to quality
and eco-friendliness
NEC Corporation
http://www.nec.com/global/prod/nw/broadcast/
NEC leads the way forward
in the digital TV broadcasting
industry around the world
NEC is a leading global company which offers world-class technological solutions and resources in
the broadcast market.
The result of expertise and technologies accumulated over many years
NEC transmitter equipment is renowned for High Reliability and Low Maintenance throughout the global broadcast community. The DTU-52 Series
inherits the technological and performance advantages of the previous DTU-51 Series, which through many years of field operation, has been highly
praised by our customers, and has successfully achieved two additional advantages; high efficiency and small footprint
A DVB-T2 compliant DTU-52 Series installed at Winter Hill (U.K.) for Arqiva, transmission provider
for UK terrestrial TV.
DTU-52 8.7kW Model DTU-52/8R7PQ
2
DTU-52 Series High-Power Liquid-Cooled Digital UHF TV Transmitter
Features
Enhanced Efficiency
User friendly monitoring and control
With the new PA, the DTU-52 Series enables a reduction in power
Control and monitoring of the equipment is carried out via the colour
compumption by an average of 20 to 30% compared to the previous
LCD on the front of the rack which features an intuitive Graphic User
model.
Interface for easy maintainability.
As an example, it is possibile to monitor IM and MER without the use of
Small Footprint
measuring equipment.
The DTU-52 Series provides up to 8.7kW output power (average) by
using 10 sets of PA units in a single rack, achieving a footprint of only
Wide range of redundancy configuration
590 (W) x 2,000 (H) x 1,000 (D) mm, making it one of the smallest
To meet customer's ever increasing demands, the DTU-52 Series can
transmitter foot-prints in the world.
offer wide range of backup options: from redundancy only in the liquid
cooling system to N+1 configurations.
Advanced cooling system
With the adoption of Hybrid Closed System for cooling, there is the
Wide band design
advantage of excellent cooling liquid exchangeability and automatic
The DTU-52 Series is designed to be frequency-agile, covering the
removal of air from the system when an amplifier is changed.
entire UHF band and thus, no channel-specific components are
required.
Compliant to a variety of digital terrestrial
broadcasting standards
Reduced maintenance costs
The DTU-52 Series is able to support a wide range of global digital
All DTU-52 Series transmitters are produced from, and supported by,
standards including ATSC, DVB-T/H, ISDB-Tb, and the latest
one common set of modules, resulting in reduced costs from purchase
established standard - DVB-T2.
to installation and suppport.
The latest in digital broadcasting technology
Power Amplifiers (PA)
The newly developed UA4000QE-S 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 to protect 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.
UA4000QE-S
3
Exciter
The compact DM-3000 Series Digital Exciter is packed with NEC’s state-of-the-art technology. A synthesizer tuned to all UHF-band signals enables
all-band 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 characteristic of the DM-3000 Series Digital Exciter is its
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 DTU-52 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 DTU-52 Series frequency-agile design, allows for the construction of an N+1 system, offering redundancy for maximized reliability and
transmission time. By using the latest 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 with broadcast signals.
4
DTU-52 Series High-Power Liquid-Cooled Digital UHF 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 features 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
Local Control/Monitoring
The easy-to-view colour 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. 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 settings can be conducted
at the touch of a button on the colour LCD screen.
Remote Control/Monitoring
The DTU-52 Series incorporates a web server and SNMP agent, enabling the transmitter to be connected 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
DTU-52 Series Transmitter
5
Configuration of DTU-52 (Liquid-cooled) Series
DTU-52 Series Lineup
DTU-52/ 1 2 3
1
2
: Output Power
Type
R9
1R8
2R7
3R6
4R4
5R3
6R2
7R0
7R8
8R7
10R0
: 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
Output Power
900W
1.8kW
2.7kW
3.6kW
4.4kW
5.3kW
6.2kW
7.0kW
7.8kW
8.7kW
10.0kW
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
P Type
PS
External Reference Input
TS Input 1
TS Input 2
PA 1
PA n
6
BPF
(Option)
Exciter 2
Control
Remote Control/
SYS.CONT
AC Input
PA 2
n-Combiner
Local
OSC
RF
Converter
Exciter Switch
OFDM
Encoding
Exciter 1
Adaptive
Digital
Corrector
n-Divider
TS Input 1
TS Input 2
Status
TX CONT
LCD Display
Pump Rack
& H.EXC
Output
DTU-52 Series High-Power Liquid-Cooled Digital UHF TV Transmitter
Transmitter Standard Configuration Table
Output*
900W
1.8kW
2.7kW
3.6kW
4.4kW
5.3kW
6.2ｋW
7.0kW
7.8kW
8.7kW
10.0kW
Model Name
DTU-52/R9SQ
DTU-52/R9PEQ
DTU-52/1R8SQ
DTU-52/1R8PQ
DTU-52/2R7SQ
DTU-52/2R7PQ
DTU-52/3R6SQ
DTU-52/3R6PQ
DTU-52/4R4SQ
DTU-52/4R4PQ
DTU-52/5R3SQ
DTU-52/5R3PQ
DTU-52/6R2SQ
DTU-52/6R2PQ
DTU-52/7R0SQ
DTU-52/7R0PQ
DTU-52/7R8SQ
DTU-52/7R8PQ
DTU-52/8R7SQ
DTU-52/8R7PQ
DTU-52/10R0SQ
DTU-52/10R0PQ
Equipment Composition [Sets]
Exciter
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
Exciter switch
PA
1
1
1
1
1
1
1
1
1
1
1
Transmitter
Divider/Combiner TX Control
1
2
3
4
5
6
7
8
9
10
12
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Rack
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
1
1
1
1
1
1
2
2
Size (mm)
Weight
590(W) x 2,000(H) x 1,000(D)
1,180(W) x 2,000(H) x 1,000(D)
359
367
407
415
447
455
487
495
528
536
568
576
608
616
649
657
690
698
730
738
1,166
1,174
* In case of DVB-T/H and ATSC
DTU-52 Series Specifications
Specification
DVB-T/H
Output Power
900W - 10kW
ATSC
ISDB-Tb
900W - 10kW
600W - 7.5kW
Output Frequency
470 - 862 (Band IV/V)
Output Impedance
50Ω
Input
ASI x 4
(in pairs, prepared for hierarchical)
SMPTE310 x 2
ASI x 1
380/400/415 V, 3-phase, 4-wire
Power Supply Voltage
-15%, +10%
Voltage Fluctuation
50/60Hz ±2%
Power Supply Frequency
Indoors: 0˚C to +45˚C
Ambient Temperature Range
Outdoors: 0˚C to +45˚C or -30˚C to +40˚C(using antifreeze and 3-way valve system)
ɘ90%(no condensation)
Relative Humidity
Standard Perfomance
Frequency Stability
DVB-T/H
Amplitude-frequency Response
Bandwidth
ATSC
ISDB-Tb
ɘ±1 x 10 -7 /year (internal reference use) (it is also possible to lock an exernal 10MHz reference)
ɘ±0.5dB (excluding BPF)
6MHz,7MHz,8MHz
6MHz
6MHz
Intermodulation Products
ɘ-36dB
ɘ-36dB
ɘ-43dB
MER(Modulation Error Ratio)
ə32dB
-
ə39dB
-
ə27dB
-
ɘ-60dBc
Meet FCC Emission Mask with Output Filter
ɘ-60dBc
-
–104 dBc/Hz @ 20 kHz offset
-
SNR(Signal to Noise Ratio)
Spurious Emission
Pilot Carrier Phase Noise
7
DTU-52 Series High-Power Liquid-Cooled Digital UHF 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. H01-11080007E

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