What can I do with my SDS 200 near the Kaufman/Ellis/Henderson county lines to help yall map this out?
Find the sites near you.
On the
database page on the right side opposite Site Frequencies (on a real computer with a big monitor; I don't know how it appears on a smart phone) there is a funnel icon and hamburger menu icon.
Click the menu icon and select FCC Callsigns map or Site Locations Report to get maps:
Oncor Energy Trunking System Profile
www.radioreference.com
Oncor Energy Trunking System Profile
www.radioreference.com
This is only good for what's in the database. There are 3 sites in NE TX that were never submitted. It also doesn't tell you which sites you can actually receive at any given location.
A better way is to search 935-940 MHz in 12.5 kHz steps in NFM mode, not digital, so you can hear the audio and be able to verify it's a control channel and not something else.
Write down all the constant P25 control channels you find. Then if possible repeat that with the antenna or scanner in different locations and see if you find more control channels.
When you have a list of all the control channels you found notice if any are between 936.5 and 939.5 MHz. That is the area that was vacated. The new frequencies are all between 935.0-936.5 and 939.5-940.0.
Look up the frequencies you found in the database and see if they correspond to any sites near you. They probably won't because most (but not all) moved and only a few sites in the database have the new frequencies.
Then look up the frequencies you found in the wiki here:
wiki.radioreference.com
This is a list of all the licensed frequencies. The old ones have a - (minus) and the new ones have a + (plus) in the A/D column. A few were not changed. Note that the Location City on the license is not always the same as the site name in the database but the counties should all be the same. I didn't add the site numbers.
I have never used a SDS100/200 so I don't know what they are capable of.
Somebody who has one can tell you how to analyze a P25 trunked system.
You should be able to analyze the control channels you found and verify some or all of WACN, System ID, RFSS number, Site number, NAC and list of neighbor sites. On the rebanded sites that I have been able to run Unitrunker on the only thing that changed was the frequencies. NAC, site numbers, etc. was all the same.
www.fcc.gov
