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Identifying New Trunked Systems Not Yet Listed in Radio Reference ??? Please Read

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user786

Member
Joined
Jun 17, 2006
Messages
9
Hi, I need some help finding "new" trunked systems from you pros out
there. I will give a quick synopsis of my relevant experience and
what I am trying to accomplish so you can get a better idea on how to
guide me. It's easy while being back home in the USA to look up FCC
or radio reference but what do I do when that data is not available
for where I am located ????? I basically need help trying to learn
HOW TO find out all the information about "new" unidentified trunked
radio systems where I am located. How do I tell if they are MOT or
EDACS or LTR and how the heck do I successfully program them????
Here goes....

My experience
---------------
I am a BC246T user for about 6 months and love this scanner!
I think I have got the scanner pretty well figured out in terms of
how to use all of its features and buttons and modes.
I live in Florida and have successfully programmed in ALL the systems
in my area and they work perfectly.
I have also done a LOT of search and store for conventional
frequencies in my area succesfully.

What I have done so far
------------------------
I am currently working on contract on a small Caribbean island for
the next 6 months and obviuosly I HAD to bring along my 246T :)
I have done a lot of search and store and have found that VHF HI is
very populated on the island in the 148Mhz to 174Mhz range. Great,
all is well so far.....
I have also found ALL the airband commercial frequencies for the
airport and ground operations overhere as well. great again! At least
I am hearing some stuff by now after a week or two of searching.

What I need help with
----------------------
Now, I have scanned the UHF band between 400 and 512 and got a just a
very few hits for what sounds like police and fire and ambulance
traffic but I also have found a few "data-type" channels around 460
Mhz.
Can this be control channels for trunked systems ????
If so, how can I tell WHAT type of trunked systems they are?? LTR MOT
EDACS ? How do I program them for listening to the activity?? Is it
possible that they are just some type of data only frequencies but
NOT trunked systems ??

Secondly, I found another "data-type" control channel around 856 MHZ.
By pure luck I just decided to make a new Motorola 800MHZ Standard
system and plug in that one control frequency and set the scanner to
Control Channel only mode and BADDA BING BADDA BOOM I get a very
active trunked system! great ! Wish I can figure out what to do with
the stuff in the 460 MHZ area......

Also I think I found another control channel or some type of data
channel around 952 MHZ. I also tried programming that in the scanner
as motorola 900MHZ system with "control channel only" option set but
I got no activity for 3 days solid of monitoring it. What's up ????
Same with the 460 MHZ data frequencies. I tried pluggin those in as
MOT UHF trunked systems but no luck.

What I need
-------------
Some of you real pros out there to guide me on how to identify if
these are really some other trunked systems or not....
And secondly....if they are....how the heck do I figure out exactly
how to program them in what mode and what options etc etc etc.

THANKS IN ADVANCE TO ALL THE GURUS WHO RESPOND. I WILL TRY TO KEEP
YOU ALL UPDATED ON HOW I PROGRESS.....
 

fmon

Silent Key Jan. 14, 2012
Joined
May 11, 2002
Messages
7,736
Location
Eclipse, Virginia
Some Motorola and EDACS sounds can be found at this link.http://www.kb9ukd.com/digital/ Incorrectly programmed EDACS voice transmissions will have a few beeps at the completion of the transmission. LTR will have noise interruptions while switching from Home Control.to the next voice freq.

I landed on nearly every Island from Eleuthera to Trinidad in late 1967 through 1968. Which island are you on. I was flying out of Naval Station Rosy Roads PR and GTMO Cuba.
 

fmon

Silent Key Jan. 14, 2012
Joined
May 11, 2002
Messages
7,736
Location
Eclipse, Virginia
Also, to find and trunk track 400 mhz Motorola systems you will need to tap the discriminator output on the scanner and run a program called Trunker to capture at least two freqs in the system. Then you will need to determine (and program) Custom Tables which include Base, Spacing and Offset of the system.

Review this section of RR Wiki for details of Trunker and the tables required.

Edit: I failed to mention, you will also need a Data Slice to capture and display on your PC the info coming our of the discriminator stream.
 
Last edited:

loumaag

Silent Key - Aug 2014
Joined
Oct 20, 2002
Messages
12,911
Location
Katy, TX
Or you can use UniTrunker without the slicer to the audio input for your soundcard.
 

LarrySC

Member
Joined
Feb 9, 2001
Messages
2,091
Location
Greenville, SC
When you make a lot of $ in the islands, buy a PRO-96 or 97 when you get back. Much easier to find the unknown. Good Luck on the project. I've been doing that for 50 years. Found 3 new freqs last week with my new PRO-2055 using a MAXRAD DB150450 dual band GAIN antenna. Aint it fun????
 

SCPD

Member
Joined
Feb 24, 2001
Messages
65,126
Location
Virginia
loumaag said:
Or you can use UniTrunker without the slicer to the audio input for your soundcard.
Or you can run Eric's new Windows sound input compatible version of Trunker / ETrunker.
-rick
 

loumaag

Silent Key - Aug 2014
Joined
Oct 20, 2002
Messages
12,911
Location
Katy, TX
rfmobile said:
Or you can run Eric's new Windows sound input compatible version of Trunker / ETrunker.
-rick
Yeah, I just got the email notice about the newest upload on the Tunker group.
 
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