One Frequency Trunking

[mikewazowski]

The only scanners that track EDACS SCATS are the Unidens from the 250/785 on, not the 780, and none of the RS scanners including digital ones.
Dave

Track is really a misnomer. They allow you to listen to the activity on the channel but they don't let you distinguish between multiple talkgroups.

It's really a SCAT squelch. It skips over the channel when the data is present and stops on voice.

 

[Thorny41587]

re:

Yes, user with the same frequencies can be on different PL's without interference. Take Walbridge 460.325 - 192.8 and Rossford Police 460.325 - 127.3 Dispatch Freqs. They don't have interference.

 

[LGLHOOK]

Is it possible to only have one frequency for a trunking system? And would that work in a scanner with just one frequency? Thanks

Here in Utah (UCAN) all I need to do is program 1 control channel into my pro-95&96 and it deciphers what voice channel to use on it's own. So yes, it is possible to only program in 1 frequency and hear all the traffic as long as the frequency is the voice channel. My pro-2067 you have to program the control channel and ALL the voice channels or it will not work properly. I know this from experience.

 

[gr8amp]

Re: re:

Yes, user with the same frequencies can be on different PL's without interference. Take Walbridge 460.325 - 192.8 and Rossford Police 460.325 - 127.3 Dispatch Freqs. They don't have interference.

Not true. If both stations are transmitting simultaneously, and have sufficient signal strength, they WILL have interference. There is NO arguing with this. Tone squelch is just that.........a squelch control. It's nothing more than that. This has been stated many times in this post alone!

 

[mikewazowski]

Most radios on community repeaters usually have busy lockout programmed into them.

If somebody else is already using the repeater, the radio senses the incorrect tone and prevents the user from transmitting until the channel is clear.

Others remove the receive pl when the mike is taken off the hangup so you are forced to listen to the repeater in carrier squelch mode before transmitting.

This helps to prevent two different users from transmitting at the same time.

 

[gr8amp]

This is true. I was re-emphasizing the basic operational principles of PL that was discussed above, as some posts don’t seem to exhibit an accurate understanding of how it works. Maybe I was wrong with this assumption, but I haven’t been given any reason to think otherwise.

I agree however, community repeaters like this have been in use for many years with varying levels of success. When configured properly, and when the users are managed properly, they work quite well. But, this is a matter of configuration, and I hope it doesn’t get misinterpreted.