Lancaster Co, EOC Siren Freqs

[melona380]

Hey all,

Does anyone happen to know what freq the EOC uses in Lancaster county for civil defense siren activation? Any chance EOC has a POCSAG system also?

PS. any cool simplex stuff out and about.

Cheers
KE0EWO

 

[cellphone]

It's been about 14 years since I lived in Lincoln. When I was there, I think they used 155.250 to trigger sirens. I believe this was also used for EOC voice paging and a voice frequency.

FCC Callsign KAB463 (LINCOLN, CITY OF)

FCC Callsign KAB463 (LINCOLN, CITY OF)

www.radioreference.com

I don't recall if they used POCSAG back then.

 

[melona380]

It's been about 14 years since I lived in Lincoln. When I was there, I think they used 155.250 to trigger sirens. I believe this was also used for EOC voice paging and a voice frequency.

FCC Callsign KAB463 (LINCOLN, CITY OF)

FCC Callsign KAB463 (LINCOLN, CITY OF)

www.radioreference.com

I don't recall if they used POCSAG back then.

Thank you, Will update if i find anything

 

[melona380]

@cellphone, 155.250 is indeed what they use... I have attached 2 files data is what I think is a AFSK Signal used for activation. Could anyone verify that this is an AFSK signal? I can provide IQ if anyone wants it

 

[PVPD730]

@cellphone, 155.250 is indeed what they use... I have attached 2 files data is what I think is a AFSK Signal used for activation. Could anyone verify that this is an AFSK signal? I can provide IQ if anyone wants it
[/QUOTE]

Those tones are proprietary to federal signal. Essentially it's an encrypted AFSK data burst used to remotely activate/monitor the siren systems. ATI has something similar for their siren equipment.

 

[cellphone]

Those tones are proprietary to federal signal. Essentially it's an encrypted AFSK data burst used to remotely activate/monitor the siren systems. ATI has something similar for their siren equipment.

They have obviously made some changes since I lived there. They were tone activated in the past.

 

[melona380]

They have obviously made some changes since I lived there. They were tone activated in the past.

Yes, looks like MSK 1200

 

[elephant101]

Not to get too far off subject; when I lived in Norfolk, their sirens were activated on 39.940 with DTMF tones. Anyone know if they still use that frequency to trigger the sirens?