Denver Public Safety Rebanding

[N0GTG]

At 1730 today DPD made an ALLCALL for all units: the rebanding programming would be tested, and all units should observe the display on their radios to make sure they didn't remain on CC SCAN. It sounds as if the rebanded freq programming will take effect this Monday.

I wonder, is it a safe assumption that the freqs involved will drop 15 MHz as in past rebanding operations, or is there some other plan?

 

[scanlist]

This is gonna be fun!

They dropped their old NPSPAC 866 freqs (LCN21-24) when they went simulcast last Fall so the 15 MHz down might apply if they opt for those former 866 freqs to replace the 860.xxx freqs. Then again they could have incorporated them into the simulcast system at that time as well so it's anyones's guess at this point. Searching the ULS lends no clues for new freq assignments either.

I did run across an on air discussion last night and the plan is to switch Den PS to the new LCN plan on Monday.

I'm sure we'll get demands from the gallery wanting the new LCN and frequency layout NOW. Problem is none of us know what it is until they actually start using it and the process of discovery and verification begins.

If the signal conditions aren't total crap on Monday I'll be be on the hunt with unitrunker on Den PS.

 

[N0GTG]

I believe during the test, the techs forced the control channel to one of the new channels. I still have LCN 21-24 in my radio, and it did not acquire a control channel during the test, so that leads me to believe the replacement freqs will be found elsewhere.

In individually monitoring LCN 21-24, I hear an occasional transmission of what might be data on LCN 21, and almost continuous ker-chunking on 22-24. At this point, my money is on -15 MHz. I guess we'll figure it out on Monday. Thanks for the educated guess, Phil.

 

[scanlist]

I'd look at the rebanded equivalent frequencies of their old LCN 21-24 as well. Which would be 851.1875, 851.5875, 852.1250, 852.650.

Prior to the National Nextel rebanding agreement years ago there was a publicly released proposal for Denver that entailed new frequencies within the current legacy 854.-861 MHz range. I do not have it handy or I would toss them into this thread as well.

Hopefully they keep this switch relatively simple as in only changing LCN 10, 19 & 20 as opposed to completely changing all 20 LCN frequency assignments.

 

[scanlist]

Caught the 7:30 A.M. test this morning and NEW LCN-19 is 854.0625

 

[scanlist]

After some research in the ULS it appears that 854.4375 and 854.5625 are the other two rebanded frequencies. Now to log which one is LCN-10 and LCN-20.

 

[scanlist]

10 A.M. Test LCN-10 is 854.4375

 

[mrstellar]

I don't understand the purpose of rebanding or why agencies do it. Does anyone have a quick and simple answer to that? I've been listening to Denver PS for a while and the system seems fine to me.

 

[abqscan]

Rebanding - The RadioReference Wiki

 

[scanlist]

Now confirmed 854.5625 as LCN-20

So you need to change the following to properly track the rebanded Denver PS system.

LCN 10 is now 854.4375
LCN 19 is now 854.0625
LCN 20 is now 854.5625

Change these in your scanner and everything should work seemlessly when Denver permanently adds these on Monday.

 

[rckydenver]

Thanks for the New freqs Phil, now i've got to re-program some scanners...Ugh..

 

[scanlist]

Next up PW and MDC.

All the frequencies for the 9 channel data only system will move down 15 MHz per ULS.

Likely 86x.xxxx replacement freqs for the PW system include 854.5875, 856.1375, 856.6375, 857.1375

DIA is mentioned in another thread

 

[RDCat]

All the frequencies for the 9 channel data only system will move down 15 MHz per ULS.

Likely 86x.xxxx replacement freqs for the PW system include 854.5875, 856.1375, 856.6375, 857.1375

DIA is mentioned in another thread

which order for public works
and dia

 

[scanlist]

Kinda difficult to know since they haven't even started the process yet.

 

[n0doz]

We aren't rebanding at DIA until May.

 

[rckydenver]

Are they still doing this switch today? LCN 10, 19,20 are quite with no activity..But it is scanning normal.

 

[captaincraig44]

Still quiet on the "new" LCN's. Are they going to switch it overnight when there's less activity?

 

[scanlist]

Could be a technical reason. Then again maybe they're messing with our minds.

Patience guys patience.

 

[Thayne]

Just for grins maybe they will plant the CC on one of the rebanded freqs---To speed up the John Q. Public side of the rebanding. If not, I bet a lot of people won't notice for awhile.
(Maybe never)

 

[radiationbob]

What better method do they have to determine what if any radios out there have not been rebanded. As soon as they switch the control channel to 10, 19 or 20 all non rebanded radios will go dead.