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TV BROADCASTING DVB-T TECHNOLOGIES PRODUCTS DESIGNING COMMUNICATIONS LINES & CHANNELS
Three - programme broadcasting system "V I K A"
The system of three programme broadcasting is intended for transmitting three independent monophonic audio programmes using standard FM transmitters in the bands 65,8 - 74 MHz or 87,5 - 108 MHz on one carrier frequency. Standard receivers equipped with special decoders receive the three - programme signal.
Specification of the system
| Bandwidth ( = 3δΑ): | ||
| I channel, Hz | 50-10 000 | |
| II & III channels, Hz | 100-10 000 | |
| Harmonic coefficient,% | νε αξλεε 30 | |
| Crosstalk attenuation between channels, dB | νε μενεε 40 | |
| S / N, dB | νε μενεε 60 | |
| Bandwidth of composite signal, KHz | 0,05-52 | |
| Maximum carrier frequency deviation, KHz: | ||
| for 65,8-74 MHz | 50 | |
| for 87,5 - 108 MHz | 75 | |
| Maximum frequency deviation caused by pilot tone, KHz: |
||
| for 65,8-74 MHz | 5 | |
| for 87,5-108 MHz | 7,5 | |
| Bandwidth occupied by the transmission on the air, KHz: |
in the limits of standards established for FM stereo broadcasting | |
| Change of noise properties in comparison with mono reception, dB |
-17 | |
| Change of noise properties in comparison with stereo reception, dB |
+8 |
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