continued...Another "Help me trunk my 780" thread!

[Cribbage]

I am trying to program a Motorola II system into my 780 (Scottsdale PD if you are interested). I have read the manual, but the details of how to program a trunked system are still a littel unclear to me.

I understand how trunking works, I just don't know how to set up the 780 to scan it. I am using the arc780 software.

I want to listen to just a selected few of the talk groups available on the system. The control channels are given for the specific repeater, along with several other frequencies. Then, for SPD, they give the talk group numbers.

Do I program in the control frequencies? Or all the frequencies? If I put in the talk group IDs and tags into the list, how do I get the scanner to listen to those instead of the control channels in the regular memories?

Please help! This is so incredibly frustrating.

Ted

 

[Cribbage]

Additional guesses on 780 trunking?

One of the control channels seems to be data only (it only transmits what seems to be data bursts). Can I skip this one?

Also, the 780 appears to have 10 talk gropus ID slots per channel. Is this correct? If so, and I want to cover addtional talk groups on a particular control freq, do I put that freq into the next channel, then populate the talk group slots with the desired groups?

Once I have all this done, I guess I tell the 780 to scan say Bank 1, and it will listen to that control freq/talk groups?

Shouldn't the talk group tag show on the display when that TG is active?

Also, I am assuming that the other freqs listed after the control freqs (Maricopa County Trunked system, Thompson Peak repeater), DON'T need to be programmed in the the 780?

When I program a control freq in, I turn ON the trunking, then also have the radio set so that TRUNKING appears in the display.

Am I getting all this correct?

Any help from a kind soul out there would be HUGELY appreciated!

Thanks!

Ted

 

[scanbc780]

If you are hearing the control channel (data burst) then your bank is not in trunking mode.
If you have the manual follow it step by step and it will work fine. If you do Control Channel only mode (you will only need the control channel freqs) choose Plan 2 for the MCSO/Scottsdale system.

I don't have my 780 in front of me or I could be more helpful.

 

[Al42]

Re: Additional guesses on 780 trunking?

One of the control channels seems to be data only (it only transmits what seems to be data bursts). Can I skip this one?

The Thompson Peak system has 2 control frequencies - 860.2625 is the primary and 859.2625 is the alternate. Only one of them will be active at any time, and all you'll hear is a digital signal like this http://www.kb9ukd.com/digital/motorola_net.wav. You program both of them, because the system can use either one at any time. The other frequencies are the talk channels - your scanner will switch to the one that has a conversation going on for one of your programmed talkgroups.

Also, the 780 appears to have 10 talk gropus ID slots per channel. Is this correct? If so, and I want to cover addtional talk groups on a particular control freq, do I put that freq into the next channel, then populate the talk group slots with the desired groups?

I don't know Uniden, but usually you can use all the talkgroups for the bank - they're bank-wide, not channel-wide.

Also, I am assuming that the other freqs listed after the control freqs (Maricopa County Trunked system, Thompson Peak repeater), DON'T need to be programmed in the the 780?

Correct. 851.3375, 852.7125, 853.3625, 853.5625, 853.7625, 854.3375, 854.5875, 857.2625, 857.7625, 857.8625, 858.7625, 859.7625, 860.2375, 860.7625 and 860.9625 are the talk frequencies. The scanner will find them by itself (as long as you have it set for control frequency only scanning).

 

[Cribbage]

Thanks for the info, all! I got it working.

Ted

 

[Cribbage]

OK, I get it!...But a definition needed...

Thanks big-time Al42 and scanbc780. I totally understand, and the scanner works great.

If I DON'T use Control Channel only mode, I would program not only the control channels, but the talk frequencies as well into one bank, then populate the talk Group ID Lists for that bank, then turn off the CC mode, and go to town?

Is there and advantage to this as opposed to Control Channel Only mode?

Thanks for all the info!

Ted

 

[mciupa]

Re: OK, I get it!...But a definition needed...

Is there and advantage to this as opposed to Control Channel Only mode?

One big advantage is if the trunk system switches from the primary Control Channel to one of the alternate Control Channels.
This would save you from scratching your head, wondering what happened, as you would continue to hear the system with all freq's plugged in.
In CC only, with the primary down and that being the only freq. you entered, there is nothing to trunktrack.
Some people have noted clipped transmissions in CC only mode.
Meaning that they may miss a reply on a tx.

 

[Cribbage]

How about...

So, now I have the primary control frequency in bank1, channel 1, and the secondary control freq in bank 1, channel 2.

Is this not going to pick up the secondary if it is use?

How about if I leave the primary in bank 1, channel 1, and put the secondary in bank 2, channel 1, and populate the ID lists on both identically, and scan both banks?

Also, back to my question above, if I don't use Control Channel only mode, I would program not only the control channels, but the talk frequencies as well into one bank, then populate the talk Group ID Lists for that bank, then turn off the CC mode, and go to town?

Or would I put one control channel in one bank, the other in a second bank, all with all the voice channels, adn scan normally (in trunking mode)?

Thanks for all the help and advise!

Ted