• Effective immediately we will be deleting, without notice, any negative threads or posts that deal with the use of encryption and streaming of scanner audio.

    We've noticed a huge increase in rants and negative posts that revolve around agencies going to encryption due to the broadcasting of scanner audio on the internet. It's now worn out and continues to be the same recycled rants. These rants hijack the threads and derail the conversation. They no longer have a place anywhere on this forum other than in the designated threads in the Rants forum in the Tavern.

    If you violate these guidelines your post will be deleted without notice and an infraction will be issued. We are not against discussion of this issue. You just need to do it in the right place. For example:
    https://forums.radioreference.com/rants/224104-official-thread-live-audio-feeds-scanners-wait-encryption.html

TDMA CODES

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BillGiff

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My question is: will the new UNIDEN BCD536HP be able to "hear" Ashley Co. S.O. and Crossett Fire Dept. radio traffic?
I do not find these codes listed and am wondwering if this scanner can "decode" their transmissions?
 

BillGiff

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Look again there are more than one freq. listed. 155.0025 is TDMA digital 155.370 is analog and digital.
So this scanner will be able to hear them correct?
 

mikewazowski

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No. Those frequencies are listed as DMR which unfortunately, is not supported in any scanner.
 

BillGiff

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So it seems there are more than one DMA hih?
Well anywho it seems/sounds like Crossett P D also went digital this week :(
 

N8IAA

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So it seems there are more than one DMA hih?
Well anywho it seems/sounds like Crossett P D also went digital this week :(
Don't confuse DMR (digital mode) with DMA (dynamic memory architecture that Uniden uses for the 396/996/15 scanners memory).
Larry
 

BillGiff

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Well we common folk are just going to have to wait a while for a plug n play scanner to "hear" all this new TDMA and ....... other stuff looks like.
Thanks
 

Jay911

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Don't confuse DMR (digital mode) with DMA (dynamic memory architecture that Uniden uses for the 396/996/15 scanners memory).
And definitely don't confuse any of it with the actual topic of this thread, which is TDMA.

Simply put, TDMA is one way of having multiple users on a trunked radio system. The other is FDMA.

Frequency Division Multiple Access = regular trunking; each user is allotted a different frequency.

Time Division Multiple Access = two (or more) users sharing a frequency by using "time slots", so that in every set period of time, each user is allotted a chunk of that time proportionally. So in a 2-slot TDMA system (like P25 Phase 2 TDMA and X2-TDMA), two users share equal halves of all allotted time on a given frequency during their voice calls.
 

N8IAA

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And definitely don't confuse any of it with the actual topic of this thread, which is TDMA.

Simply put, TDMA is one way of having multiple users on a trunked radio system. The other is FDMA.

Frequency Division Multiple Access = regular trunking; each user is allotted a different frequency.

Time Division Multiple Access = two (or more) users sharing a frequency by using "time slots", so that in every set period of time, each user is allotted a chunk of that time proportionally. So in a 2-slot TDMA system (like P25 Phase 2 TDMA and X2-TDMA), two users share equal halves of all allotted time on a given frequency during their voice calls.
I'm not the one confused, I understand what the two are. But, the frequencies he asked about are listed as DMR in the RR database. He keeps referring to them as TDMA.
Larry
 

kayn1n32008

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TDMA IS the ota mode for DMR. If a agency/business goes to DMR then it is TDMA. If it is some other form of digital it will be FDMA (like NXDN or P25 unless it is P25 phase 2)
 
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