Did the LA MTA Change Radio Systems?

[HopperD]

Sometimes I listen to the Los Angeles MTA bus and rail lines (Red, Blue, Gold, Green) but haven't tuned in for a couple of weeks. Yesterday and today I'm not picking up any communications. I have the frequencies programed in two scanners from the RR database.

Anyone know if they changed systems? The only thing I pick up from all of the frequencies in the database is Facilities Security, nothing else can be heard.

 

[kearthfan101]

Metro rail communications have switched to NXDN digital modulation, not monitorable by scanners. This has occurred over the last 2 years, if not longer. You can monitor the signals from computer programs like Digital Speech Decoder, but not with the scanner itself. Gold switched over at least 2 years ago, and the others slowly switched over sometime last year.

FYI, there are 2 or 3 other threads in the Greater LA section that covered this upgrade.


Sent from my iPhone using Tapatalk

 

[f40ph]

I can't recall at the moment but saw that a manufacturer was considering a NXDN scanner.

edit: found it...I'm sure more will follow
http://socalscanner.com/2014/09/aor-to-release-multi-mode-digital-scanner/

 

[HopperD]

Thanks, didn't know this. I was on the Red Line about 3 weeks ago and was able to pick up the underground subway. I guess it hadn't completely switched over yet.

Well at least I can still pick up the Sheriff and Fire Dept's just in case there's trouble.

 

[karldotcom]

are they running analog underground? hmm

 

[kearthfan101]

From what I know they switched over completely, both under and above. Here is a photo from the red line cab.

Sent from my iPhone using Tapatalk