Higher adjustable bandwidth in Sennheiser wireless

Sennheiser presents the new versions of their professional wireless solutions. The new double EM 3732-II receptor with twice wider bandwidth and the new bodypack type 5212-II transmitter that incorporates adjustable bandwidth five times wider.

Equipped with the special mode free of interference that guarantees a more reliable and flexible wireless transmission for multichannel applications, Sennheiser has presented the new versions of its professional wireless solutions: the new double receptor EM 3732-II with twice broader bandwidth and the new new bodypack type transmitter SK 5212-II that incorporates adjustable bandwidth five times.

The bandwidth up to 184MHz is now available for sound engineers to adapt to the different transmission conditions worldwide and avoiding interference from other transmitters, with the same separation of channels and strong signal immunity to which they are accustomed to professional systems.

Astrid Vettin, product manager of professional systems in Sennheiser, has indicated that “the systems are equipped with very high quality amplifiers. Its high IIP3 value, a quality criterion for intermodulation resistance, ensures that the level of intermodulation of the products is very small, this means that the reliable reception is possible in RF (radiofrequency) environments”.

The double EM 3732-II receiver is also available in a version with command function (EM 3732 COM-II) and as an individual receiver (EM 3731-II). All receptors offer excellent audio quality and a friendly operation: with OLED display (Organic Light Emitting Diodes) Legible, intuitive menu, frequency scan function and ability to program transmitters via an infrared interface. The AES3 / EBU digital output allows you to connect the receptors directly to digital consoles, while the Ethernet connection slot enables receptors to integrate to a network for monitoring and remote control via a PC or a MAC.

Multichannel applications

In addition to the wider adjustable bandwidth, another new function of the bodypack type 5212-II transmitter is the low intermodulation mode. In this, approximately 30% more channels can be accommodated inside a given frequency window, to a 10MW diet.

Normally the number of usable channels is limited by the so -called transmitter intermodulation, where the useful transmitter signals are mixed with the signals from other transmitters or sources of interference that are captured by the antenna. The result is a cluster of undesirable interference that are transmitted together with the useful signal. The intermodulation problem occurs provided that several transmitters operate close to each other, for example, in a stage or on a television broadcast where several presenters and guests intervene at the same time.

In this regard, Astrid Vettin stressed that “the low mode of intermodulation of the SK 5212-II transmitter now now significantly enables the reduction of it. As a result, the channels can be grouped closer and the spectrum can be used more efficiently. Alternatively, one can benefit from the greater reliability that this function offers”.

The transmitter can also be operated in the standard mode at 10MW, thus extending the operation time, or can transmit to 50MW to extend the range. "Even with this additional function, the transmitter continues to be compact as always and uses only one AA battery for television, musical and live productions applications, where the size of the transmitter plays a key role, SK 5212-II is the preferred option worldwide."

The frequency range of these new devices is 470-638mhz (Rank L), 614-798MHZ (Rank N) and 776-960MHZ (Rank P). The transmitter is also available in a special version for the United States in 614-697.9MHz (Rank N US).