Product CategoriesProduct InformationUBS is the leader in the development and manufacture of Digital Audio Broadcasting solutions. UBS can get you set up to deliver the high quality sound your customers demand. Please feel free to contact our Sales Department for further information on our product lines or consult our list of UBS Value Added Resellers and qualified UBS installers for your local representation. About DABUBS Ltd. is a member of a World DMB organisation The World DMB Forum is an international non-governmental organisation. The objective of this organisation is to co-ordinate the implementation of DMB Digital Radio services based on the Eureka 147 DMB system. |
DAB COFDM Modulator 2000 OEM BoardFeatures 
OverviewThe DAB Modulator OEM card offers the advantage of generating a complete DAB COFDM signal on just one board, which can be conveniently installed inside a DAB Transmitter. This innovative product is the result of extensive consultations with many of the world’s premier DAB broadcasters and meets all the requirements of the ETSI and Eureka DAB Standards. InputsDual NA inputs which can automatically and seamlessly switch between the two network feeds, having corrected for any differential network delay of up to 1 Second. Dual NI Inputs with Auto Switching between inputs. ProcessingActing on the ETI header inserted by the ensemble multiplexer, the DAB-Modulator can perform dynamic multiplex management, allowing all modes of operation (Mode l, ll, lll and lV). Static delay can be incrementally adjusted in service, up to 1.6 seconds, offering the flexibility required when implementing a single frequency network architecture. Under the control of either NA or LI timestamps inserted in the ETI by the ensemble Multiplexer, the modulator can automatically manage network delays up to 1.6 seconds. IF OutputThe DAB Modulator uses all-digital synthesis and quadrature modulation. A digital IF Section converts the complex I/Q signal to an IF signal, using direct modulation. The output is an IF frequency of 44 MHz (or 36 MHz, optional). Digital PrecorrectionThe DAB modulator features both digital Linear and digital Non Linear precorrection. The Non Linear precorrector is able to reduce, in both phase and amplitude, the intermodulation products resulting from the nonlinear characteristics of the high power amplifier. The value of third and fifth order products are adjustable, thereby reducing both in-band and out of band intermodulation products. Linear precorrection compensates for the frequency and group delay response of the RF path in the system prior to transmission. This distortion is mainly caused in the combiner and mask filter sections of the overall transmission system. Adjustments can be made to the Band Tilt, Band Sag, S Curve and overall group delay. ControlLocal control and machine-machine control (optional) supported on two serial ports: RS232 and RS485. Optional FeaturesWEB Interface Remote Control optionRemote control is offered via the remote Ethernet Interface using the optional Web server solution. The WEB pages are designed as a complete Graphical User Interface (GUI), for monitoring the status and setting the parameters of the DAB Modulator. SNMP Remote Control OptionSimple Network Management Protocol (SNMP) is supported via the Ethernet interface. The MIBs are available from UBS for customers wishing the flexibility of integrating this product into their existing control solution. RS485/RS232 machine-machine optionThe command protocols are available from UBS, for customers interested in controlling the RF Transmitter from the DAB Modulator unit. |
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