Does anybody happen to know what it is? Thanks!
I enlisted the help of the members over at air raid sirens https://airraidsirens.com Dave (Rheems1) and Cruz (Stormsetter4) where able to supply me with this information...hope it is some help.....
Cruz stated " I do know for a fact that they use FSK. Not sure on what frequency though.......FSK is a activation method that basically sends information. It is a lot more secure than 2 tone or DTMF and is usually used in two way siren systems. Here is a video of one of the Wichita thunderbolts and you can hear the ATI version of FSK in the beginning": https://www.youtube.com/watch?v=R-xXdj-gHrs
A quick google search pulls the the RFP that was issued for the upgrade. It states that the frequency for the sirens is under callsign KX5126; which shows as 155.025. It also stated that there was no money to replace any sirens, just the upgrade the activation system.
I found the frequency on a news video yesterday
155.025Care to share?
Sorry for the dumb question, but are you saying if I monitor this frequency in Wichita, when they have to activate the tornado sirens, then a page will go out through this frequency? If this isn't correct, what's this frequency used for?155.025
Sorry for the dumb question, but are you saying if I monitor this frequency in Wichita, when they have to activate the tornado sirens, then a page will go out through this frequency? If this isn't correct, what's this frequency used for?
Thanks for the info
You won't even hear a digital burst. It's part of the P25 system. Just like the new fire and EMS pagers. Rather than "listening" for the activation tones or FSK burst going out over the air, they are connected to the P25 control channel just like the radios. For example.. When a page goes out for Russell EMS, you hear "Russell Dispatch, listening units stand by for EMS page", followed by a silence.. During that silence, the pagers are activated through the P25 system, then dispatch broadcasts the call.
I find that very hard to believe.
PVPD730 and NEC911 are correct. You CANNOT page on P25 800. The technology does not exist. Motorola was actually working on a scaled down radio that COULD be utilized as a pager on a trunking system, but they have dropped the idea for whatever reason (perhaps, who would pay $1000 or more for a 10 channel pager/walkie?). And the reason you don't hear tones on the 800 side is they are likely using Motorola consoles, and Motorola doesn't allow you to send out tones across multiple channels at the same time (unlike our old Zetron consoles). So the silence on the 800 dispatch talkgroup means the tones are going out on VHF or UHF. If you try to send tones across both at the same time it drops one channel or the other, as we found out this week with our new MCC5500 consoles. And trying to quickly reconfigure them in the middle of a thunderstorm-turned tornado warning was a real joy.
I did some research on this and found that they are set up just like the VHF System used in Shawnee County to set off their sirens. They are using DTMF and you can hear it when a change is made, poll is made or other operations are undertaken.