R&S®NM7000 VHF Transmitter Family
Liquid-cooled high-power transmitters for analog TV
With the TV Transmitter Family R&S NM7000, Rohde&Schwarz has developed a generation of liquid-cooled VHF transmitters for analog TV. They consist of the following main components:
- Exciter
- Power amplifiers incl. power supply
- Transmitter rack
The VHF transmitters are available for analog TV with powers of 2 kW to 20 kW (hi´gher power ratings on request). Each amplifier has its own power supply which is integrated into the amplifier module and thus cooled by the liquid cooling system.
The amplifier module is self-engaging and can be exchanged during operation without any liquid loss of the closed cooling system and without impairing the operation of the other modules.
The power supplies are fed with AC supply voltage, i.e. no auxiliaryvoltage supplies are required, which improves the availability of the transmitters. Parts exclusively made of stainless steel, aluminium or plastic are used for the cooling system in the transmitter rack.
All transmitters can be equipped with a second exciter and the associated automatic switchover unit, the two units being integrated into the transmitter rack.
