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Finding the control channel

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UPMan

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Program each frequency conventionally and scan. The one that sounds like a "motorboat" is the control channel.
 

UPMan

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When it is being a control channel, the frequency will only have continuous data.

However, many systems have alternate control channels. In that case, the control channel frequency can periodically change (systems around here typically switch to an alternate control channel frequency at midnight or thereabouts). When it is not an active control channel, a frequency listed as an alternate will typically carry voice traffic.
 

jim202

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If it is an LRT type trunking system, you could have voice traffic on the active control
channel. The LTR control channel functions differently from a Motorola control channel.

Jim



UPMan said:
When it is being a control channel, the frequency will only have continuous data.

However, many systems have alternate control channels. In that case, the control channel frequency can periodically change (systems around here typically switch to an alternate control channel frequency at midnight or thereabouts). When it is not an active control channel, a frequency listed as an alternate will typically carry voice traffic.
 
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