RadioReference on Facebook   RadioReference on Twitter   RadioReference Blog

Go Back   The Forums > U.S. Regional Radio Discussion Forums > Iowa Radio Discussion Forum

Iowa Radio Discussion Forum - Forum for discussing Radio Information in the State of Iowa.

LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 12-04-2018, 10:35 AM
radioboy75's Avatar
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
Join Date: Jul 2004
Location: Rock Rapids, Iowa
Posts: 122
Default Telemetry data on LEA (Area 1D)

Somewhat frequently, for like an hour or so at a time, I am getting some data noise on the LEA channel in my area, 155.790. The data sounds very similar to SCADA telemetry -- you know, like the data that is sent by water well monitors, gas monitoring stations, and the like.

Normally, assuming this is just some sort of DX, I would tone up my LEA channel, and call it good (use CTCSS to eliminate all traffic on the frequency unless it has the appropriate CTCSS tone).

The problem is, the traffic carries the 192.8 Hz tone, which is the same tone as Area 1D LEA. (In my area the closest repeater with that tone is Terril LEA.)

I assumed that some nearby utility department has a transmitter on (Area 1's) LEA input frequency, 154.770 MHz. But I have been unable to confirm that. Also, the data transmissions are very short, so part of me wants to say that they aren't actually going through the repeater, since there's basically NO repeater tail -- that the frequency programmed in the SCADA devices is the OUTPUT LEA frequency, 155.790.

Can anyone shed some light on this? Do any of you have this problem CONSTANTLY rather than occasionally? That might help us track down the location of the SCADA data . . .

Reply With Quote
Sponsored links
  #2 (permalink)  
Old 12-04-2018, 5:08 PM
MidwestRadioListener's Avatar
  Premium Subscriber
Premium Subscriber
Join Date: Mar 2004
Location: Story County, Iowa
Posts: 20

Seemed like I had read about this happening other places around the State but see you were involved in that thread as well so I guess that was no help but that thread has been idle for a few Months.
Reply With Quote
  #3 (permalink)  
Old 12-05-2018, 7:00 AM
Join Date: May 2008
Posts: 32
Default Cedar County

My scanner locks on for extended periods of time to 192.800 also, at various times. I have it programmed as a regular frequency. I usually just do a temporary lockout so I don't know exactly how long it lasts.
Reply With Quote
  #4 (permalink)  
Old 12-07-2018, 9:07 AM
mws72's Avatar
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
Join Date: Mar 2002
Location: Quad-Cities (Iowa-Illinois) USA
Posts: 480

192.8 MHz is within the Television Channel 10 bandwidth.
Michael W. Scheel - Davenport, Iowa - K0QCS - Davenport (IA) ARC - Muscatine (IA) ARC - RCMA IA-011 - USMC Corporal (2531) 1972-1976
Reply With Quote

dps, iowa, isp, lea, scada

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 11:44 AM.

Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
All information here is Copyright 2012 by LLC and Lindsay C. Blanton III.Ad Management by RedTyger
Copyright 2015 by LLC Privacy Policy  |  Terms and Conditions