DAB VHF Transmitter Family R&S NA7000
The VHF Transmitter Family R&S NA7000 developed by Rohde & Schwarz is a new generation of liquid-cooled DAB VHF transmitters for digital audio broadcasting (DAB Eureka Project 147). The transmitters consist of the following main components:
Its key features are the Frequency range from 174 MHz to 240 MHz, MOSFET technology for power amplifiers, digital precorrection, liquid cooling, redundancy of essential components, a very compact design, a cost-effective installation and an optional exciter standby.
The amplifier modules of the DAB VHF Transmitter Family R&S NA7000 are self-engaging and can be replaced during operation without losing any liquid from the closed cooling system and without impairing the functioning of the other modules. When an amplifier module is inserted into the rack, it is hooked up to the RF, control and cooling system lines by appropriate connecting elements. As the AC supply voltage is directly fed to the amplifier modules, additional auxiliary power supplies are not required. This enhances the availability of the transmitters.
All transmitters can be equipped with a second exciter (exciter standby) and the associated automatic switchover unit. The DAB transmitters are designed according to the concept of the TV Transmitters R&S NM/NW7000. This is very favourable in installation and maintenance when DAB and TV transmitters of this type are simultaneously operated at one location.
ROHDE & SCHWARZ GmbH & Co. KG
Muehldorfstrasse 15, 81671 Munich, Germany
Phone: +49 89 41 29 - 0
Fax: +49 89 41 29 12 164
e-Mail: CustomerSupport@rohde-schwarz.com
Internet: http://www.rohde-schwarz.com/
