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| Primary Control Channel http://interceptradio.com/bbs/viewtopic.php?f=1&t=774 |
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| Author: | Rodentkj [ Mon Aug 15, 2005 9:45 am ] |
| Post subject: | Primary Control Channel |
Quick trunk question.... I don't understand what it means when you look at all of the trunk frequencies and you see one that is listed as a primary control channel and another one listed as a alternate. What does the the primary channel do and how is it different than then others? 866.26250 866.77500 866.80000 866.82500 867.17500 867.20000 867.41250 867.93750* Primary 868.33750* Alternate |
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| Author: | MTM [ Mon Aug 15, 2005 11:47 am ] |
| Post subject: | |
The control channel - alternates or changes every 24 hours or so. The primary may remain in service for 24 hours and then the system -- automatically switches to use a secondary control channel for a period of time and then back to the primary. There can be as many as 4 control channels per site. Most just keep all control channels programmed -- and let the scanner "pick" which one to use -- because only one control channel is "active" or in use at any given time. |
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| Author: | Mark [ Mon Aug 15, 2005 12:02 pm ] |
| Post subject: | |
The new generation of trunked scanners only need the control ch. to receive the whole system. |
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| Author: | Rodentkj [ Mon Aug 15, 2005 1:19 pm ] |
| Post subject: | |
Mark wrote: The new generation of trunked scanners only need the control ch. to receive the whole system.
Ahh, okay. Light bulb starting to come on.. So I have a BC246T. And I listen to Snohomish County. Can I use only the Primary and Alternate control channels when programming the scanner? In other words, can I leave out the voice channels? |
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| Author: | STEVE F. [ Mon Aug 15, 2005 1:28 pm ] |
| Post subject: | |
:D GOOD QUESTION, that was help to me also. STEVE F. |
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| Author: | midnightcaller [ Tue Aug 16, 2005 9:44 am ] |
| Post subject: | trunk |
IF you scanner has control channel only mode, then you can program the control channel for the trunk system. think you can only set it up for 1 control channel.. I did that for a while the only promblem is if they change the control then you have to re-program the new control channel Dave |
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| Author: | MTM [ Sat Aug 20, 2005 8:23 am ] |
| Post subject: | |
YES. If you have a radio that does "control channel only" trunking -- like the PRO-95 or PRO-96. Only one control channel is active at any given time. Program all known control channels into the same bank. ------- You can even program different site control channels --- into the same bank -- but there is a "trick" to it. You MUST place at least one or two Non-trunked channels in between each control channel. Otherwise -- the scanner locks onto the first control channel only. This would apply to a very large system like King County. You could then follow a Seattle Talk Group in any zone they were active in -- provided you had all of the control channels for every site entered into your scanner. It will only work IF you alternate from control channel to a non-trunked channel, like a local fire channel or WSP channel. And if you have 100 or more TG's entered --- it will slow the scanning down. It works best if you limit the Talk Group IDs to just a few. |
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