Moving from Conventional DMR to Trunked

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AnikF1R

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I'm monitoring Delta a few miles from Mpls-St. Paul Int'l Airport. I can hear plenty of conversations on the Conventional DMR system I've set up. I've looked up on RRDB and found that this is a DMR Connect+ system. I've got the DMR upgrade installed on my 436 and I'm running the RC4 version of Sentinel. Here are the steps I've taken in Sentinel:

- Create New Favorites List
- Name it "Delta Air Lines - MSP"
- Click Edit Favorites List
- Select the newly created list
- Select the Options tab, assign FLQK, #16
- Click on Systems tab
- Append a new system, "Delta System," of type MotoTRBO Trunk
- Select Delta System in the left pane
- Select the Options tab, assign SQK #0
- Append a new department, "Delta Department"
- Assign DQK #20
- Select the Sites tab
- Append a new site, "Delta Site"
- Assign Site QK #10
- Select Delta Site in the left pane
- Append 13 frequencies, in order, adding LCNs from RRDB (if incorrect, will be replaced by the LCN Finder later)

I write to scanner...

I monitored my new favorites list on a Sunday evening- a busy time for most airlines. The scanner doesn't ever stop on anything. Service Type Custom 1 is downloaded and monitored.

Ok, I thought, my LCNs from the database are incorrect or otherwise inputted incorrectly by me. So I've run the LCN finder. In about three weeks, it's never found anything with the LCN Finder. I should at least get one find, especially on non-stop traffic nights like Sundays.

I figured that maybe I needed to add an actual channel(s) into the department. So, I took some TGIDs from my conventional system and appended some channels with TGIDs (13, 43, 52, etc.). Still nothing. Even with ID Search turned on, nothing.

I hesitated creating this post because I thought I'd happen upon what I'm doing wrong eventually. I try to resist the urge to get on here and ask for someone else to do the work for me without taking a reasonable crack at it myself. It's been several weeks and still nothing- while the conventional system is on fire with traffic.

Thank you for taking a look! I'm all ears!

P.S. - In conventional mode, "CON" is at the bottom of the 436's screen. I assume this is in observance of the Connect+ plan.
 
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AggieCon

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Can you upload or email your favorites list?

It sounds to me like you probably have it programmed properly.

I use "Digital Threshold Mode" of "Manual" and a "Digital Threshold Level" of "5" for my DMR.

You didn't mention it but perhaps you did do so: In the "Frequencies" tab of the site, make sure each frequency has the correct color code or "Color Code Search" for the "Color Code" column.

I'm not quite sure what is going on.
 

AnikF1R

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Looks like I didn't have the Digital Threshold set to Manual, 5. I just made the change to my favorites list on the 436. In the meantime, here's my .hpe Favorites List for Delta. Let me know if you're not able to read the file. I've tried setting up Delta as a DMR One Freq and just about every other system type.

Thanks!
 

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ofd8001

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Are you seeing any Signal Strength Indicator bars? If not are you too far away to receive the system.

Then the basic questions, sometimes it can be the "little things" we know, but overlook trying to find "big things":

1. Is the FL downloaded to your scanner?
2. Is Monitor set to On?
3. Are all the appropriate Quick Keys turned on in your scanner? While they look to be on via programming, sometimes they can get "bumped" while in the scanner.

(I hope you can get this resolved. Just last week we were in Minneapolis staying close to the airport. It would be nice to get this programming for future trips.)
 

AggieCon

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I looked your file over, and I didn't notice anything wrong.

Does is actually scan? Does the system and department show up on your scanner?

Have you been able to receive any DMR with the scanner?

What is your squelch set to?
 

AnikF1R

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Are you seeing any Signal Strength Indicator bars? If not are you too far away to receive the system.

Then the basic questions, sometimes it can be the "little things" we know, but overlook trying to find "big things":

1. Is the FL downloaded to your scanner?
2. Is Monitor set to On?
3. Are all the appropriate Quick Keys turned on in your scanner? While they look to be on via programming, sometimes they can get "bumped" while in the scanner.

(I hope you can get this resolved. Just last week we were in Minneapolis staying close to the airport. It would be nice to get this programming for future trips.)

It's funny that you mention the signal strength bars. I'm not seeing any. However, I'm hearing conversations just fine in the conventional system I created, and I don't see any bars there, either.

The FL is downloaded and monitored in the scanner. Just to check, I changed monitor to "off" in the scanner, and I got "Nothing to Scan."

All the Quick Keys are on. I changed them to "off" just to make sure. I got the "Nothing to Scan" message. This brings up a question. I know how to activate/deactivate SQKs and DQKs. Is the third field in the xx.xx.xx entry format for Department, as I suspect, and not Site? How do I make sure my Delta Site is on? If it's not on, I would assume I'd get "Nothing to Scan" since I've only got one site.

Aggie, to answer your question, I've attached a pic of the 436 screen as it's searching. I've only listened to DMR as conventional systems on my scanner. I'll check out creating a trunked system for another agency and see if that works.

Thanks!
 

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darunimal

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Is your squelch on 2, as well as conventional won't show you bars, digital shows bars while digital system is being 'scanned' and received
 

AggieCon

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Gosh... It all looks good to me. Try a lower squelch perhaps. But it does slow down quite a bit with a low squelch.

Perhaps try listing in the site frequencies only the confirmed frequencies you've received with conventional mode. This might reduce some of the clutter it is searching through.

Also, program them as analog FM and see what the heck is up on each frequency.
 

AnikF1R

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Success! Lowering the squelch from 3 to 0 immediately brought in activity on my trunked system. Thank you to all who helped!!!
 

AggieCon

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Excellent! Glad you got it working. You are welcome. Happy scanning.
 

AnikF1R

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Excellent! Glad you got it working. You are welcome. Happy scanning.

You have no idea! This ranks up there with when I first caught a signal on my satellite dish. That took about as long. It was Galaxy 10R.
 

ofd8001

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I'd say you are at the very edge of signal coverage. With analog as you get toward that edge, you hear hissing in the signal. Digital is a different creature - its "clean" until gone.

On your quick key question, Sites are at the same level as Departments. Thus you have FF.SS.DD <enter> where FF is Favorites List, SS is System and DD is Department (and site for trunked systems).

The confirmation of a site quick key being on is seeing that site being "scanned" (as is in your photo). Also as you surmised, "Nothing to Scan" would show up if the only site's Quick Key was Off.
 

AnikF1R

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I'd say you are at the very edge of signal coverage. With analog as you get toward that edge, you hear hissing in the signal. Digital is a different creature - its "clean" until gone.

On your quick key question, Sites are at the same level as Departments. Thus you have FF.SS.DD <enter> where FF is Favorites List, SS is System and DD is Department (and site for trunked systems).

The confirmation of a site quick key being on is seeing that site being "scanned" (as is in your photo). Also as you surmised, "Nothing to Scan" would show up if the only site's Quick Key was Off.

I think you're completely right about being on the fringe of coverage. I'm only getting one or two hits an hour at home. On top of a hill (in Burnsville) my reception is much better.
 

ofd8001

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Best as I can tell from their FCC license, the transmitter sits is located at the airport. They are licensed for 70 watts, but that doesn't necessarily mean they are pushing 70 watts. Then antenna height will be a factor and its probably not very high.

I imagine if you were to go to Fort Snelling Cemetery on that ridge parallel to Post Road, it'll be like gang-busters.
 

AnikF1R

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Best as I can tell from their FCC license, the transmitter sits is located at the airport. They are licensed for 70 watts, but that doesn't necessarily mean they are pushing 70 watts. Then antenna height will be a factor and its probably not very high.

I imagine if you were to go to Fort Snelling Cemetery on that ridge parallel to Post Road, it'll be like gang-busters.

I'm probably a bit out of the coverage area pushing nearly 10 miles out.
 

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