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Key issues to consider when switching to digital February 2010

Key issues to consider when switching to digital February 2010. Going digital – 12.5 kHz DMR or 6.25 kHz FDMA? . Two of the most important reasons that LMR users go digital are to add voice capacity and to more easily add data applications

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Key issues to consider when switching to digital February 2010

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  1. Key issues to consider when switching to digitalFebruary 2010

  2. Going digital – 12.5 kHz DMR or 6.25 kHz FDMA? Two of the most important reasons that LMR users go digital are to add voice capacity and to more easily add data applications This presentation sets out the important issues for the user to think about

  3. Adding capacity – 12.5 kHz DMR or 6.25 kHz FDMA? Adding data applications nearly always means that more capacity is needed to ensure: Existing voice quality of service is to be maintained and The new application is to work well There are real differences between DMR and 6.25 kHz FDMA when it comes to increasing capacity in terms of: FCC licensing implications Infrastructure requirements

  4. Digital migration in existing FCC 12.5 kHz licences - DMR Analogue to digital migration with DMR Existing analogue talk paths in a 12.5 kHz license New digital talk paths in your 12.5 kHz license Double capacity in current license?

  5. Digital migration in existing FCC 12.5 kHz licences - FDMA Analogue to digital migration with 6.25 kHz FDMA Existing analogue 12.5 kHz license New digital talk paths In 12.5 kHz license Double capacity in current license?

  6. Spectrum efficiency - DMR and 6.25 kHz FDMA 6.25 kHz FDMA Migration DMR Migration Existing analogue 12.5 kHz licence New digital channels 6.25 kHz spectrum efficient? New channels fit legacy devices? No risk of new interference issues?

  7. Going digital DMR and 6.25 kHz FDMA licence summary Going digital with DMR means: Doubling capacity in existing licenses Keeping existing spectrum No new frequency co-ordination requirements Being able to continue to use legacy analogue radios in your spectrum No new risk of interference as the channel characteristics stay the same and proven 12.5 kHz signals are maintained

  8. Use of infrastructure: DMR compared to 6.25 kHz FDMA Migrating from one channel DMR to two channel DMR: No extra complexity No extra cost Power efficient No extra space No new site issues No extra maintenance One channel DMR Two channels DMR

  9. Use of infrastructure: DMR compared to 6.25 kHz FDMA Migrating from one channel FDMA to two channel FDMA: Extra complexity Extra cost Greater power use More space Potential site issues Extra maintenance One channel 6.25 kHz FDMA Two channels 6.25 kHz FDMA

  10. Summary When you go digital: Understand the real differences in the technology that is on offer Understand the license implications Understand the infrastructure requirements today and tomorrow Make the smart choice

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