Control Channels

[betito1954]

How do find the corresponding primary control channel frequency for a specific talk group when programming a bcd325p2 scanner? For example what site and frequencies do i select when trying to program baldwin park and the city does not match any of the names on the system frequencies table? Thanks

 

[imbruski]

Look at ICI which is Interagency Communications Interoperability, Baldwin Park Police have several TG’s and use closest site to your location.
bruski

 

[wtp]

california, florida, or another one ?

 

[hiegtx]

california, florida, or another one ?

As wtp noted, specifying which state would help in giving you a useful answer. Or, provide a link to the database page for the system in question.

How do find the corresponding primary control channel frequency for a specific talk group when programming a bcd325p2 scanner? For example what site and frequencies do i select when trying to program baldwin park and the city does not match any of the names on the system frequencies table? Thanks

You're not going to find a 'specific control channel' that is tied only to your city. That's not how a trunked system works. For a better understanding of this system type, see Trunking Basics - The RadioReference Wiki

For whichever system that covers your area in question, there are one or more sites that might carry the radio traffic for Baldwin Park, Generally, the one closest to the city would. Depending on how that specific system is set up, as well as the location of the unit making the call, there could be additional sites that also carry the radio traffic.

When a unit tuned to a talkgroup for that city starts a transmission, the system controller assigns the conversation to a voice channel on the site(s). Data on the control channel for the site instructs radios (mobile, hand-held, or fixed location) tuned to the same talkgroup ID to go to the specific voice channel frequency. If another unit, on the same talkgroup, does not immediately reply, when the reply does come, it could be on the same voice channel as the first transmission, or on a different one. The data on the control channel tells the field units where to go to maintain contact. The radio traffic will be on the assigned voice channel, not on the control channel itself.

 

[cmdrwill]

Baldwins Park is in east Los Angeles County, California. So IS the ICI system.

Once a stop on the Red Car line to San Bernardino.

 

[betito1954]

As wtp noted, specifying which state would help in giving you a useful answer. Or, provide a link to the database page for the system in question.

You're not going to find a 'specific control channel' that is tied only to your city. That's not how a trunked system works. For a better understanding of this system type, see Trunking Basics - The RadioReference Wiki

For whichever system that covers your area in question, there are one or more sites that might carry the radio traffic for Baldwin Park, Generally, the one closest to the city would. Depending on how that specific system is set up, as well as the location of the unit making the call, there could be additional sites that also carry the radio traffic.

When a unit tuned to a talkgroup for that city starts a transmission, the system controller assigns the conversation to a voice channel on the site(s). Data on the control channel for the site instructs radios (mobile, hand-held, or fixed location) tuned to the same talkgroup ID to go to the specific voice channel frequency. If another unit, on the same talkgroup, does not immediately reply, when the reply does come, it could be on the same voice channel as the first transmission, or on a different one. The data on the control channel tells the field units where to go to maintain contact. The radio traffic will be on the assigned voice channel, not on the control channel itself.

Thanks for the info. Cleared some points regarding repeaters