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1.
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Clear description of the referenced document:
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2.
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Status of approval:
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Approved
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3.
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Justification for the specific reference:
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it is a normative reference into ITU-T J.157 (ex J.wtv-req)
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4.
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Current information, if any, about IPR issues:
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None. IPR info in ETSI are found at https://ipr.etsi.org/
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5.
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Other useful information describing the "Quality" of the document:
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EN 300 421 has been applied on most of the STB over the world and more than millions of receivers have been manufactured under this specification.
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6.
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The degree of stability or maturity of the document:
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EN 300 421 Version 1.1.2 was published in Aug 1997. It is an approved document by ETSI
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7.
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Relationship with other existing or emerging documents:
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None
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8.
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Any explicit references within that referenced document should also be listed:
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None
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9.
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Qualification of
ETSI:
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ETSI is recognized under the provisions of ITU-T Recommendations A.5 and A.6. Qualifying information is on file at TSB.
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10.
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Other (for any supplementary information):
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None
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