sacramento signal 1000 freq

[avtarsingh]

anyone know what freq the signal 1000 that sac city and county uses ?

i know that lowjack is on 173.075

i have listened during lowjack broadcasts and you can hear the data bursts -

anyone know what the signal 1000 freq is ?

thanks

 

[pfish]

I beleive its hardwired into the dispatch center, or by other means and not RF.

antfreq might be able to correct me if im wrong, or give further information.

 

[RolnCode3]

219.9000

It is most definitely broadcasted by the transmitter, in the field. That's how the patrol cars can RDF it.

 

[Sac916]

219.9000

It is most definitely broadcasted by the transmitter, in the field. That's how the patrol cars can RDF it.

There are actually several frequencies utilized for ETS. Some are for testing/training.

I beleive its hardwired into the dispatch center, or by other means and not RF.

antfreq might be able to correct me if im wrong, or give further information.

'


I can't get into my agencies specifics ( confidential and stuff ) but in general ETS technology utilizes mini transmitters, mobile and handheld receivers, and towers. The towers are hard-wired.

Personally I've taken Oakland PD's training course, it's pretty damn fun.


Here's an old thread
http://www.radioreference.com/forums/archive/index.php/t-7036.html

(side note)
The way technology is progressing, more and more agencies are using these type of RFID tools.

http://en.wikipedia.org/wiki/RFID

LAPD is gearing up to use RFID for pursuit tracking. It's all based on the same method/theory of tracking bad guys.

http://www.webpronews.com/topnews/topnews/wpn-60-20060203LAPDTakesRFIDToTheChaseScene.html

 

[avtarsingh]

signal 1000

i was going to say - why dont they use gps type or rfid tracking -

seems like a huge waste of time to have 3-5 patrol cars and sometimes even a helicopter tied up over a stolen bike or a generator chasing all over like ham radio types on a t hunt

 

[avtarsingh]

signal 1000

oh also - thanks for the response and the info

 

[RolnCode3]

Most likely because there are many agencies that use these tags, so even if the tag leaves the County, there are other agencies that can still track it...

Dunno how either of the other technologies would work, so can't speak to them.

i was going to say - why dont they use gps type or rfid tracking -

seems like a huge waste of time to have 3-5 patrol cars and sometimes even a helicopter tied up over a stolen bike or a generator chasing all over like ham radio types on a t hunt

 

[radio10-8]

We recently had a lojack signal from a stolen car that was on a train. Tracks paralled the freeway and well you can guess what a mess this was.

 

[redhook]

i was going to say - why dont they use gps type or rfid tracking -

If the stolen property is inside of a garage it can not recieve a GPS signal. With RFID you need to be within a few feet to get a signal (the chips are powered by the RF output from the reader).

 

[RolnCode3]

GPS will sometimes receive indoors. Depends on the quality of the receiver. I can usually get my handheld to display my location inside my apartment.

 

[Duster]

Just out of curiosity, is there a security issue with us publicizing these freqs? At my old department we also use Sig1000, and it is like the State secret...we never, ever, ever, talk about or even testify in court about the technology. Even in testimony, we just say that "while responding to an audible alarm...".

Can someone take these freqs and jam them or interfere with them if they know them?

 

[kma371]

Can someone take these freqs and jam them or interfere with them if they know them?

It's possible, but then again, anything is possible

 

[RolnCode3]

Just out of curiosity, is there a security issue with us publicizing these freqs? At my old department we also use Sig1000, and it is like the State secret...we never, ever, ever, talk about or even testify in court about the technology. Even in testimony, we just say that "while responding to an audible alarm...".

Can someone take these freqs and jam them or interfere with them if they know them?

I've seen a set of general orders that says it is not be talked about near suspects, etc. How could a department condone perjury in court over this technology?

If that's how the bad guy got caught, that's how he got caught. I understand a department not publicizing it, but to lie on the stand doesn't make sense.

And there's no reason a person couldn't transmit on these frequencies and cause havoc. Also, I don't know if this is considered "publicizing". We're not taking previously secret information and now making it public. We're just discussing technology and information that's been made public (although not widespread) before. Same as info on the LoJack system.

 

[etofsrud]

If there ever is a jammer, I'd like to see his face when he realizes that he's the
fox in a fox hunt "for keeps", and the hunters have a 90 something % success rate in
finding the hidden transmitter!!. This is another tool that my side of the Bay Area did
not have (or I was not aware of) I get quite a kick when during a quite evening or
night, a Sig 1000 comes up and it's GAME ON! I've been DF'ing for years, for sport,
ARRL ILT, and maintaining my works networks, and I must say, the DF'ing skill level
of many officers is pretty impressive!

- Eric - n6oim

 

[emptech]

Funny you should be asking this question, around 10PM there was a signal 1000. The device suddenly dissapeared from it's location, I80 and Madison. The signal went dead. About a half hour later, the signal appeared in Elk Grove. I don't know what happened next, I had to get back to work.

Jim

 

[etofsrud]

Ya, I did hear that one, and how it went through the typical dropouts when it left the park.
The first one I heard them loose. (I thought).. I got busy and did not hear them pick it
back up again in EG. Cool! Never say never Thanks for the update!

- Eric - n6oim

 

[RolnCode3]

Yeah, those are the towers going "hot" and "cold". Usually with a good activation, it'll hit towers as long as it's active. I thought I heard they're only active for a fairly short time, but that might be in error. Won't say the # I heard, though.

I also heard the last update about EGPD having a Signal 1000 event generated, but nobody was on the call yet. Guess no helos were available to work it, either?

 

[etofsrud]

This thread touched on LoJack, so I wanted to share this.
I ran across an interesting description of how LoJack works. It's pretty good.
http://www.freqofnature.com/index.php?m=Common&p=LoJack
And while there, I ran across this even more interesting collection
of digital and analog data samples.
http://www.kb9ukd.com/digital/
Some will take you way back. It would be a handy site to keep bookmarked,
to possibly help identify that new beep or buzz you keep hearing.

- Eric n6oim

 

[Sac916]

This thread touched on LoJack, so I wanted to share this.
I ran across an interesting description of how LoJack works. It's pretty good.
http://www.freqofnature.com/index.php?m=Common&p=LoJack
And while there, I ran across this even more interesting collection
of digital and analog data samples.
http://www.kb9ukd.com/digital/
Some will take you way back. It would be a handy site to keep bookmarked,
to possibly help identify that new beep or buzz you keep hearing.

- Eric n6oim

Something I just learned recently.

After a while, the LoJack equipped vehicle reduces the number of times it transmits the ID over a given period of time. This is done to prevent battery drain.

But, if the Lojack system detects database inquiries ( officers/dispatchers running plates ) the number of times the LoJack device transmits increases. The theory is that the plate is being run because it was seen by an officer or dispatcher so the transmit times increase to provide better triangulation and recovery.

 

[swat]

Anyone know what a RAM activation I heard Sac pd put one out thought i would post here and also the 219.900 thats not valid for me (Bill) it jumps to 219.90250.... And also is it like some weird burst of sound that is the activation or what is it and how does it work. Thanks