DVB-S2 digital BS tuner unit with internal demodulator
5 September 2007
Telecoms, Datacoms, Wireless, IoT
Alps has developed a DVB-S2 (digital video broadcasting - satellite 2) digital BS tuner unit with an internal demodulator, the BSBE2 series, for use in products compatible with high-definition satellite digital broadcasting.
The tuner is compatible with both the high-definition DVB-S2 and standard DVB-S screen formats. While it is useable with both formats, it is the same size as its predecessor, the BSBE1 series (41,0 mm wide x 73,3 mm deep x 13,0 mm high) which could only be used with the DVB-S format. This enables designers to exchange the previous product for the current product in order to reduce the design load on the circuit board.
The tuner's internal demodulator IC causes heat to be generated when the digitally altered signals are modulated. The heat source is in the upper section of the demodulator IC. Opening a hole in the part of the cover over the upper section and bringing the lower section of the circuit board used for the IC into contact with part of the outer cover, creates a double thermal insulation structure which is very effective for dissipating heat.
In addition to preventing the signals emitted by the oscillator inside the tuner from influencing other parts of the product as noise, the cover over the exterior cladding also serves to muffle digital noise emanating from the product's decoder or CPU.
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