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White Rabbit
   
Women's Advocate
location:
Missouri
Gender: Male
 |  |  | Re: radio scanner question
<Reply # 20 on 1/27/2004 11:22 PM >
|  | | | Posted by tbone
Is anyone familiar with bandwidth modifications to this scanner?
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I'd get one from one of the British internet sites if you can like www.javiation.co.uk That way, you don't even have to mess with bandwidth modification. Most of them go to 2Ghz or above with no blocked out sections.
There's always a chance customs will seize the thing, but I've talked to the javiation guy at length, and he really tries to make them look inconspicuous when he sends them to the US.
--WR
Underground Ozarks http://www.undergroundozarks.com
Missouri, Arkansas, Oklahoma, and Kansas |
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NoSuchPerson
  
Stop, or I'll ask you again!
| | Re: radio scanner question
<Reply # 21 on 1/28/2004 2:28 PM >
|  | | | Mmkay, sorry for the language here, but HOLY SHIT PEOPLE. If you're going to post a "fact", for god sakes, please try and be accurate.
Fact:
The Motorola Trunking format is an OPEN PROTOCOL. Meaning, everybody and their brother can build a device that tracks them. You do, however, require a license from Motorola to sell a device which works on the system. Motorola granted Uniden and GRE a license to manufacture scanners that receive their Trunking formats. Exactly the same deal with the GE/Ericsson EDACS. As for EF Johnson LTR trunking, that's an open protocol working on the GPL format, so you can do whatever you want with that, as long as credit is given.
As for Motorola Digital, IMBE (Improved Multiband Excitation) isn't a protocol owned by Motorola. It's owned by Digital Voice Systems (www.dvsinc.com). It's an open protocol, meaning anybody is free to make a device which uses the protocol, but licensing fees must be paid to DVS. The IMBE protocol is the protocol that APCO International (Association of Public-Safety Communications Officials, International) chose to be the new standard for intercommunications. When you see reference to APCO-25, P25 or Project 25 communications, this is refering to the IMBE protocol. In order for a system to be P25 compliant, it must support what's called a CAI, or Common-Air-Interface. This means that any other device that is P25 compliant can talk to the other device, regardless of manufacturer. Example, Motorola's implementation of the P25, they call ASTRO. Motorola Radios in ASTRO format, use what's called a Network ID. This is the digital equivilant of "PL", or in FRS terms "Privacy Codes". If you have a Motorola ASTRO radio, set to a Network ID of 123, you cannot talk to another radio unless they have the same Network ID. As well, you cannot talk to a radio from another manufacturer. However, Motorola ASTRO radios DO support CAI, which means they don't have a Network ID, so they can talk to any other P25 compliant radio in the world.
Uniden and GRE have a license to sell radios with the IMBE protocol, so Motorola has nothing to do with this at all (much to their dismay).
Generally speaking, any new scanner (PRO-96, BC-796, etc...) will receive any technology. The PRO-96 will receive:
Analog Conventional
Digital (P25) Conventional
Motorola Type I Trunking
Motorola Type II Trunking
Motorola Type IIi Trunking
GE/Ericsson/Com-Net EDACS Trunking
EF Johnston LTR Trunking
No digital scanner out right now will receive GE/Ericsson/Com-Net AEGIS or Pro-Voice digital, as they are entirely proprietory protocols, so unless they want to sell the rights to a scanner manufacture, you're SOL.
-Ex
Unit calling radio say again? |
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