Basic questions
- Thread starter ofna89
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justinnmr
Member
This seems to be the system you are looking at, and at least in my browser I see a bunch of TG's: http://www.radioreference.com/modules.php?name=RR&sid=173
DEC (Decimal) and Hex simply different ways to input the TG into your scanner. Depending on the scanner you use / software you use, you enter the DEC / HEX number for the TG you wish to input.
DEC (Decimal) and Hex simply different ways to input the TG into your scanner. Depending on the scanner you use / software you use, you enter the DEC / HEX number for the TG you wish to input.
ka3jjz
Wiki Admin Emeritus
If you mean this entry in the database;
http://www.radioreference.com/modules.php?name=RR&sid=173
The frequencies are listed under 'system frequencies'. Some are red because these are the frequencies used to send a constant data stream designed to maintain the Portland trunk. The talkgroups are listed in both hex (hexadecimal - base 16) and decimal; the hex data is for Motorola and other professional users; the decimal is the representation translated for Uniden and other trunktrackers. When you think of talkgroups, think of groups of users.
The basic idea behind trunking is that many groups of users may share a frequency at different times. We have a very good wiki article on the subject, the link for which is right on that first page (article in wiki terms) as you enter the site. Just click 'wiki' in the blue toolbox. It's not too much of a stretch to say that it's becoming more and more important to understand what trunking means, and the basics of what it does. So many communities are using it now, in many different forms.
73s Mike
http://www.radioreference.com/modules.php?name=RR&sid=173
The frequencies are listed under 'system frequencies'. Some are red because these are the frequencies used to send a constant data stream designed to maintain the Portland trunk. The talkgroups are listed in both hex (hexadecimal - base 16) and decimal; the hex data is for Motorola and other professional users; the decimal is the representation translated for Uniden and other trunktrackers. When you think of talkgroups, think of groups of users.
The basic idea behind trunking is that many groups of users may share a frequency at different times. We have a very good wiki article on the subject, the link for which is right on that first page (article in wiki terms) as you enter the site. Just click 'wiki' in the blue toolbox. It's not too much of a stretch to say that it's becoming more and more important to understand what trunking means, and the basics of what it does. So many communities are using it now, in many different forms.
73s Mike
DickH
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ofna89 said:
From your questions, it is obvious you do not understand the concept of trunking. Here is a simple explanation that may help.
The object of trunking is to allow many users to share a relatively few frequencies.
A trunking system is controlled by a computer. Information (data) is exchanged between the system radios and the computer on a control channel, sometimes called a data channel. It sounds like a strong buzz.
A large system can have up to 28 freqs., 4 of which may be used as control channels. The control channel may be changed once a day or as often as the programmer decides. Some scanners need only the control channels to track the entire system Just put in the 4 Control Channels for that system you referenced.
Each group of users (Fire, Police, etc.) is assigned TALK GROUPS. In a Motorola Type II system, the most common type, TGs are usually in 32 number steps starting with 16 and going up to 65536; 16, 48, 80 --- 4656, 4688, 4720 --- 28944, 28976, etc. System radios can have more than 100 TGs programmed into them.
Use the Talk Group numbers in the DEC column, not in the HEX column.
When a user pushes the talk button on his radio, data is sent to the computer. The computer chooses an unused freq. and sends that data to all the radios using the TG of the originating unit. This all happens in a fraction of a second and it happens EVERY time a radio is used.
EXAMPLE:
Fire Dispatch calling Engine 4 (TG 4528 on 856.7125)
Engine 4 answering Dispatch (TG 4528 on 867.2625)
Respond to 73 Elm Street (TG 4528 on 855.9625)
Engine 4 responding (TG 4528 on 858.4375)
If you have entered TG 4528 into your scanner, it will decode the control channel data and change your scanner freqs. to follow the conversation on TG 4528.
This should get you started, but you should read the manual carefully. You may need to read it several times.
Dick thanks for pointing out that I obviously dont understand trunking. Some of us are new to scanners and dont have the vast knowledge that you do. The instruction book for RS pro-97 isnt the easiest to understand for someone like myself who obviously doesnt understang trunkin, but Im begining to catch on.
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