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4DTV is a proprietary broadcasting standard and technology for digital cable broadcasting and C-band/Ku-band satellite dishes from Motorola, using General Instrument's DigiCipher II for encryption. It can tune in both analog VideoCipher II and digital DCII satellite channels.
However, the U.S. Federal Communications Commission C band proceeding and auction, designated 3.7–4.2 GHz as C band. [2] The C band is used for many satellite communications transmissions, some cordless telephones, as well as some radar and weather radar systems. The C band contains the 5.725 - 5.875 GHz ISM band allowing unlicensed use by ...
Primetime 24 (PT24) was a special package offered on C band satellite sent out to viewers who mainly live in remote and distant locations. The package consisted of local ABC , CBS , NBC and Fox affiliates on the East Coast: The service was broadcast via the AMC-3 satellite, encrypted using DigiCipher 2 .
In November 1990, Primestar launched as the first North American direct-broadcast satellite service. Hughes's DirecTV, the first national high-powered upper K u-band satellite TV system, went online in 1994. The DirecTV system became the new delivery vehicle for USSB.
DigiCipher II uses QPSK and BPSK at the same time. The primary difference between DigiCipher 2 and DVB lies in how each standard handles SI metadata, or System Information, where DVB reserves packet identifiers from 16 to 31 for metadata, DigiCipher reserves only packet identifier 8187 for its master guide table which acts as a look-up table for all other metadata tables.
Hybrid C/K u /K a-band satellite; launched as Telstar 8 88.9°W Galaxy 36 (Galaxy 28R) LS-1300 Intelsat: 13 December 2022, Ariane 5 ECA: C-band replacement 87.2°W TKSAT-1 2015-08-19: 87.0°W: SES-2: GEOStar-2.4: US SES: Direct Broadcasting North America, Latin America, Caribbean: 21 September 2011, Ariane 5 ECA: Hybrid C-/Ku-band satellite 85. ...
The now-defunct VOOM and PrimeStar services both used General Instruments/Motorola equipment, and thus used a DigiCipher 2-based system very similar to that of earlier 4DTV large dish satellite systems. [citation needed] In Canada, both Bell Satellite TV and Shaw Direct DBS systems use digital encryption standards. Bell TV, like Dish Network ...
[citation needed] As of 2009, there are 23 C-band satellites and 38 K u /K a band satellites. [17] There were over 150 channels for people who want to receive subscription channels on a C-band dish via Motorola's 4DTV equipment via two vendors Satellite Receivers Ltd (SRL) and Skyvision Archived January 13, 2011, at the Wayback Machine. The ...