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Video Eyewear
875 MHz) by means of a mixer oscillator from which the Video Eyewear frequency (FOSC = FIF +FSYMB = 43,025 MHz) is down-converted and phase by a hoisting engine resumption loop by the following QAM are steered demodulator. The new QAM demodulators (of 2000 forward) can accept IF with 36,15 MHz, their necessity directly avoids the Untenumwandlung stage mentioned above. ADC in the traditional approach (double conversion), the changed over QAM signal is > applied to an analog-digital converter (ADC) with a resolution of 9 or 10 bits (]]; frequently undersampled with a frequency on behalf of 20 MHz, not necessarily connected with the symbol frequency. QAM of this is a key element in the channel decoding process: Beginnings with the digital QAM signal it accomplishes digital demodulation and the half Nyquist, which filters, resounds to equalization i-and of the q-signals and reformatting, those into a suitable form for the FEC electric circuit demapping is against (similarity generally with 8 bits). It plays also a role in the master clock and hoisting engine resumption loops, those, as well as the production of the AGC for the control of IF and Rf-amplifiers at the front to be mentioned. FEC of the FEC block accomplishes DeInterleaving, reed Solomon Video Eyewear decoding, and energy spreading De-Randomisieren; like the box for satellites, the original data are the 188 byte transportation packages form parallel (8-bit data, master clocks and control signals). The BlockierenADC three, QAM and FEC now form individual integrated circuit (individual splinter troughing decoder). Other functions the processor, creeping conditioned entrance, and entmultiplexiert, the decoding of the Audios MPEG-2/des video and all further „secondary “functions (OSD, interfaces, modem, etc.) are identical in principle to those, which are described above for the satellite for the same level of functionality. Interacting receiver (with cable back getting channel) in principle differs the interacting receiver from the fundamental receiver only through its „net interfaces “part (NIM), because of the necessity for an upward directed to the back getting channel. This needs, additionally for the existing circuit of the channel of the receiver directed downstream, that is described in the preceding point, Video Eyewear specifically
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Video Eyewear
