15.2.11-UPDATE No.4+BONUS-DOORDARSHAN India-INSAT 4B at 93.5°E-C band: RECEPTION QUALITY-3 725 H Doordarshan & QPSK constellation before and after the failure+quality status of reception,3 725>3 842 MHz & 7x measurement results,archived data as a BONUS
--- Think-Tank dxsatcs.com / Czech & Slovak DX Satellite Club / Mr. Roman Dávid ---
in today's update I define and compare the quality status of reception before and after the failure of the Insat 4B satellite
--- one of the many fault conditions, which I have identified the frequency packet Doordarshan - 3 925 H on date 5.2.2011 ---
current status after the failure of the Insat 4B satellite
about three minutes I am on the packet frequency Doordarshan-3 925 MHz identify unknown signal with a high level
oscillating from 10 to 30 mV with a bandwidth of 5 MHz !
3 725 H Doordarshan : DD National India
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--- Quality status before the failure of the Insat 4B satellite on date 1.3.2010 ---
___ 3951 H MPEG-4 Sakshi TV - Insat 4B at 93.5°E & outstanding quality status in the Central European reception zone ___
3 951 H_quality status : In the time span of 15 minutes, I identified the peak quality of 16.3 dB, with a slightly oscillating MER
amplitude in the narrow range from 15.8 to 16.3 dB, with stable zero error rate bBER.The outcome measurements at elevation
angle of only 2° evidencing the exceptional quality of reception derived from high-level flow the EIRP around 43 dBW in the
middle zone of Europe .For monitoring quality changes in reception over a longer period of time than 15 minutes, for example
60 minutes,I can certainly say that the band oscillation of the tip-Mer will be extended to a new amplitude from the original
levels + / - 0.3 dB on a new level of + / - 1.5 dB >> 14-17 dB .
Practical evidence of stable zero error BER before Viterbi decoder with minimal oscillation of the peak-Mer.If the oscillations
/ChBER+MER/ varied in a wider range than I defined, then the exemplary course of the four phases of the QPSK carrier could
not be reached .
--- 3951 H MPEG-4 Sakshi TV - Insat 4B at 93.5°E & spectrum analysis ---
3 951 H MPEG-4 Sakshi TV 3 951 H MPEG-4 Sakshi TV - BER analysis
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