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Forty-five days after the publication of this Plan, new systems in areas of high congestion, subject to local conditions, shall meet the one vc per 12.5 kHz efficiency standard or equivalent of Phase 1 spectrum efficiency criteria. In certain circumstances, new systems that make use of equipment not meeting the spectrum efficiency criteria may be authorized. For example, a new system that optimizes the use of the existing spectrum environment through vertical loading may be permitted. Such systems would be considered as any other non-standard system as per the calendar of events. Furthermore, applications for the expansion of an existing network or system employing non-spectrum. | rhe National Archives Digital Preservation Guidance Note 2 Selecting storage Media for Long-Term Preservation Digital Preservation Guidance Note 2 Selecting storage media for long-term preservation Document Control Author Adrian Brown Head of Digital Preservation Research Document Reference DPGN-02 Issue 2 Issue Date August 2008 THE NATIONAL ARCHIVES 2008 Page 2 of 7 Digital Preservation Guidance Note 2 Selecting storage media for long-term preservation Contents 1 INTRODUCTION.4 2 SELECTION ISSUES.4 2.1 Longevity.5 2.2 Capacity.5 2.3 Viability.5 2.4 Obsolescence.5 2.5 Cost.5 2.6 Susceptibility.5 3 THE MEDIA SELECTION SCORECARD.6 4 CONCLUSION.7 5 BIBLIOGRAPHY.7 Page 3 of
