New User BCD436HP Umatilla Trunked System

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garymunck

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Athena, OR
I am a new user and I recently purchased a Uniden BCD436HP to monitor the Umatilla/Morrow County Oregon Trunked system. The RR database does not seem to have the complete system.
I can receive all the west side of the area info.(site-1), but not the east end of the area. This may be what is listed in the RR database as site-2.
I see that the FCC has the following frequencies licensed for the Weston site: 453.2125, 435.4625, 435.525, 435.5875, 435.6375, 453.7175, 453.8125, 453.8625, 458.525, 458.5875, 458.6375, 458.8125, 460.1375, 460.175, 465.1375, 465.175.
I can pickup a lot of voice traffic on 453.5875, some on 458.5875, and sometimes faintly on 460.1375.
I find 2 what seem to be control channels in the area: 460.1000 which is listed for site-1. The other channel shows at frequency 463.0250 and I also get a close call hit on this when I drive by the remote transmitter site. This frequency is not listed on the FCC list, but is listed in RR database.
I found this thread from when they figured out the site-1 information a few years ago.
http://forums.radioreference.com/general-scanning-discussion/18548-base-freq-offset-step.html
Any ideas on what frequencies, base, offset, and step I should try to figure out this system?
 

ChrisP

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May 20, 2002
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Portland, OR
I've always wondered about the 463.025 control channel for the Umatilla/Morrow trunked system. I've never heard it as part of the system when I've been out that way. That frequency is a nationwide medical MEDCOM frequency, so I would be surprised if they would use it as part of the trunked system.

Did you try these yet:

Base Offset Step CH Lo CH Hi
0 453.01250 380 6.25 380 535
1 460.00000 536 6.25 536 759

- Chris
 

garymunck

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Athena, OR
Thank you for the reply and explaining the 463.0250, that makes sense.
I tried the site one numbers for band plan and they did not seem to work. Since I could not find another control frequency, I added the 460.10000 control from site 1 to this set of frequencies and am doing a trunked discovery. It has picked up parts of 2 TGID conversations. In other words not working correct.
 

garymunck

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Premium Subscriber
Joined
Mar 9, 2014
Messages
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Location
Athena, OR
Base Offset Step CH Lo CH Hi
0 453.01250 380 6.25 380 535
1 460.00000 536 6.25 536 759
463.025 control channel

I am now picking up all the TGIDs I wanted.
 
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