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Shuffle Band Plan

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joescanner

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US Patent #7546085 issued describing the invention.

TX frequency=Base Frequency+[(759−N)*Channel Spacing] Specifically, if the determined band plan is “Band Plan 3—Non-splinter & Shuffle,” and the assigned voice channel is between 759 and 160, then in the above equation, the Base Frequency relates to 806.0125 MHz. If the determined band plan is “Band Plan 4—Splinter & Shuffle,” and the assigned voice channel is between 759 and 161, then in the above equation, the Base Frequency relates to 806.0250 MHz. Specifically, if the determined band plan is “Band Plan 5—International Non-splinter & Shuffle,” and the assigned voice channel is between 759 and 0, then in the above equation, the Base Frequency relates to 806.0125 MHz. If the determined band plan is “Band Plan 6—International Splinter & Shuffle,” and the assigned voice channel is between 759 and 0, then in the above equation, the Base Frequency relates to 806.0000 MHz.

RX frequency=Base Frequency+[(759−N)*Channel Spacing] In the above equation, the Base Frequency relates to the lowest frequency that a repeater in the site with Band Plan 3 utilizes for transmissions. Specifically, if the determined band plan is “Band Plan 3—Non-splinter & Shuffle,” and the assigned voice channel is between 759 and 160, then in the above equation, the Base Frequency relates to 851.0125 MHz and the Channel Spacing relates to 25,000 Hz. If the determined band plan is “Band Plan 4—Splinter & Shuffle,” and the assigned voice channel is between 759 and 161, then in the above equation, the Base Frequency relates to 851.0250 MHz and the Channel Spacing relates to 25,000 Hz. Specifically, if the determined band plan is “Band Plan 5—International Non-splinter & Shuffle,” and the assigned voice channel is between 759 and 0, then in the above equation, the Base Frequency relates to 851.0125 MHz and the Channel Spacing relates to 25,000 Hz. If the determined band plan is “Band Plan 6—International Splinter & Shuffle,” and the assigned voice channel is between 759 and 0, then in the above equation, the Base Frequency relates to 851.0000 MHz and the Channel Spacing relates to 25,000 Hz.
 

WayneH

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I'll sum it up... The channel assignment range has been inverted. Rather than 851.0125 meaning 000 (decimal) it now means 759.

865.9625 161
865.9375 162
< .. >
851.0625 757
851.0375 758
851.0125 759

All other standard freq calculation rules apply like splinter systems being shifted down 12.5kHz (so 161 means 865.9750). The rebanding channel plan shouldn't change (I haven't read the patent or looked any further so YMMV).
 
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