800mhz Transition Website

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jpm

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Scaumburg and Northwest Central Dispatch are keeping current frequencies but moving to a different chan. What does this tell you about the scanners working with theses new channels.
 
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N_Jay

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jpm said:
Scaumburg and Northwest Central Dispatch are keeping current frequencies but moving to a different chan. What does this tell you about the scanners working with theses new channels.


Keeping frequencies, but changing channels??????


WTF do you mean? :lol:
 

PhilJSmith67

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The data stream for Motorola systems carries channel numbers, not frequencies. Even for frequencies that remain the same, the channel numbers sent via the control channel will be different under the new bandplan. This is why all Motorola trunking scanners will be affected by the change.

I don't know if the channel numbers listed by the FCC under 47 CFR 90.613 are the same as the ones used by Motorola, but nevertheless, the channels are being renumbered.
 
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PhilJSmith67

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Thanks for the URL for the list, remedy44.

I have to say one thing that is just absurd about the FCC's new channel numbers. Notice that below 854 MHz, every 12.5 kHz step is assigned a channel number. However, the remainder of channels above 854 MHz are numbered by 25 kHz steps, offset by 12.5 kHz.

I hope that Motorola isn't sticking to this ridiculous scheme and is, instead, using their own proprietary numbering scheme where they actually number EVERY 12.5 kHz step from 851 through 869. Otherwise, when the FCC changes their mind down the road and begins assigning the 0 kHz offset "splinter" frequencies, we'll have to update firmware again.
 
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