Motorola Type II Smartnet (unitrunker)

[Saint]

I'm decoding a Motorola Type II Smartnet system with Unitrunker and one frequency keeps comming up twice in the system. The frequency is on,
LCN 64
AND
LCN 320

FREQUENCY=939.0125

IS this normal on a system like this to see them use a frequency twice in a trunked system.
Steve

 

[DiGiTaLD]

Do you have the correct bandplan selected for the site? Should be the 935 MHz button in the Bandplan Wizard.

 

[Saint]

Bandplan

Do you have the correct bandplan selected for the site? Should be the 935 MHz button in the Bandplan Wizard.

I click on bandplan and it is ok, I download the site from R.R. and the bandplan is right for this system, maybe if I let the system run for awhile it will make some changes.
Steve

 

[GTR8000]

No, it should not be showing up twice like that. The LCN 64 entry is incorrect, 939.0125 would be LCN 320.

Go to the Channels tab of the Site window and delete the LCN64 entry (highlight that row and click the - button). It shouldn't come back after you do that.

 

[Saint]

Wrong LCN

No, it should not be showing up twice like that. The LCN 64 entry is incorrect, 939.0125 would be LCN 320.

Go to the Channels tab of the Site window and delete the LCN64 entry (highlight that row and click the - button). It shouldn't come back after you do that.

Thanks for your help, I deleted LCN 64 entry and shut down and restarted, I will run it for awhile and see how it works, I was deleting the other entry and it kept commng back up.
Steve

 

[GTR8000]

If you were deleting LCN 320 939.0125, it should have kept coming back because it's a valid LCN/frequency combo. LCN 64 939.0125 should not come back. If it does, there's something funky going on.

 

[Saint]

Lcn

If you were deleting LCN 320 939.0125, it should have kept coming back because it's a valid LCN/frequency combo. LCN 64 939.0125 should not come back. If it does, there's something funky going on.

It seems to be OK, It has not come back up so far, LCN 64 939.0125 was put in there when I imported the information from R.R. for some reason and then after that I ran the system with Unitrunker and it kept adding LCN 320 939.0125 because this is what Unitrunker was tell me was right but I kept second guessing Unitrunker and taking the wrong LCN out.
Steve

 

[GTR8000]

When monitoring systems in Unitrunker, it's best to let them run for a full day or two before importing anything from RR. That allows you to observe the actual frequencies in use by the system, rather than what is in the RRDB, which can obviously be incorrect/outdated. If you lock onto a control channel and let Unitrunker create a new system, then sit back and let it run for a few days, it'll fill in all the channels on its own as there is activity on the system. Importing from RR can skew those results, as you found out.

For future reference, the LCN's will increase in numerical order as the frequencies increase. If you look at all of those channels, as the LCN's increase so do the frequencies. 939.0125 made no sense as LCN 64 because it was totally out of numerical order as far as where the frequency was showing up compared to the rest of the frequencies.

 

[GTR8000]

By the way, what is the Connect Tone for this system? If you look on the Info tab of the Site window, it'll show up next to tone under Motorola.

 

[Saint]

Tone

By the way, what is the Connect Tone for this system? If you look on the Info tab of the Site window, it'll show up next to tone under Motorola.

fingerprint=0x2e1
profile=0.68
tone=83.72

I was locking onto the control and then after 10 or 20 seconds I was importing the info from R.R. for the site, as you said this was causing the problem, thanks so much for the help Unitrunker has been running since I made the changes you told me to do and the frequency is not coming back up. From now on I won't be in a hurry to import information.
Steve

 

[GTR8000]

No problem, Steve...glad to help.

By the way, is the site window still showing up as Site 0 Adhoc? It really should've changed to something else by now, like Site 1.

If you plan on checking the other two Saia systems in the area, grab the Connect Tones for those also so I can update the database (and make sure the frequencies are correct).

Thanks!

 

[Saint]

Trunked systems

No problem, Steve...glad to help.

By the way, is the site window still showing up as Site 0 Adhoc? It really should've changed to something else by now, like Site 1.

If you plan on checking the other two Saia systems in the area, grab the Connect Tones for those also so I can update the database (and make sure the frequencies are correct).

Thanks!

Just for good luck I deleted everything from Unitrunker and started listening to the system from scratch, it's finding the frequencies as I speak, I am not going to import anything this time and just let Unitrunker do it's thing.

Since I moved I am having problem picking up the other Saia systems, also Ford Communications, General Motors, but I am going to keep moving my antenna around and when I get any information I will post it for you, I know if I go down along the Niagara River, and up near Lake Erie, I start picking up the CC channels but it's a little cold right now to be doing that, but I will update all of them for you when ever I pick up the Control channels.
Steve

 

[SCPD]

I deleted LCN 64 entry and shut down and restarted,

The shut-down was unnecessary. The correct LCN and frequency will appear the next time that channel is used.

 

[SCPD]

Just for good luck I deleted everything from Unitrunker and started listening to the system from scratch, it's finding the frequencies as I speak, I am not going to import anything this time and just let Unitrunker do it's thing.

Mark the frequencies as confirmed. The import won't touch them.

I know if I go down along the Niagara River, and up near Lake Erie, I start picking up the CC channels but it's a little cold right now to be doing that,

Stay warm.

Regards,
Rick

 

[Saint]

Thanks for the info

Mark the frequencies as confirmed. The import won't touch them.

Stay warm.

Regards,
Rick

Thanks for the information Unitrunker, I don't need to worry about keeping warm anymore, I just got my scanner back from RadioWorld this morning, the USB jack on the side of the scanner became loose so they had to change it and put a new one in, I also ordered 25 feet of coax RG8X and I now can pick up all the control channels from my apartment so that's a real plus. this cable is a lot better then what I had and did the trick for me.
Steve

 

[troymail]

By the way, is the site window still showing up as Site 0 Adhoc? It really should've changed to something else by now, like Site 1.


Thanks!

I recently saw Site 0 Ad Hoc on a local system that I wasn't receiving very well. Is that not valid? (I assumed it was).

 

[GTR8000]

Site 0 can be valid on a Motorola system, I've seen it a few times myself even with 100% decoding on a strong signal. (This system, for example) Generally speaking, though, unless you know that a particular system has a Site 0, it's probably not a valid site.

 

[troymail]

Typically, I see the site reporting a primary and alternate control channels on Unitrunker but the particular system/site I am looking at is only showing the primary CC and no alternates. It also appears that all of the 5-6 frequencies have been seen as the CC at one time or another....

 

[GTR8000]

Interesting. What system is this? Is it in the RRDB or no?

 

[troymail]

Interesting. What system is this? Is it in the RRDB or no?

University of Maryland, College Park Trunking System, College Park, Maryland - Scanner Frequencies