oldradioguy2010
Member
I am looking for frequencies for key ffauns.I am not sure if this is the right area.
Any way I would appreciate any thoughts.
DW
So. Cal
Any way I would appreciate any thoughts.
DW
So. Cal
key faub frequency
- Thread starter oldradioguy2010
- Start date
- Status
mmckenna
I ♥ Ø
It'll vary depending on exactly the model/brand, etc.
But often if you look around the 315MHz area you can find many.
Another option is to run the FCC ID off the back of the key fob on this site:
FCC ID Search
That'll provide some useful info.
But often if you look around the 315MHz area you can find many.
Another option is to run the FCC ID off the back of the key fob on this site:
FCC ID Search
That'll provide some useful info.
oldradioguy2010
Member
Thank you mmckenna
I can start there.
I like looking for low power radiators.
DW
So Call.
I can start there.
I like looking for low power radiators.
DW
So Call.
mmckenna
I ♥ Ø
You can also find some in the 434MHz range, as well as 902 - 904MHz area. There's even some that run down around 125KHz.
Pretty short bursts, on the order of tens of milliseconds, so you'll have to be sitting right on it to hear anything.
Pretty short bursts, on the order of tens of milliseconds, so you'll have to be sitting right on it to hear anything.
oldradioguy2010
Member
Well a quick test of distance, my car is about 20 ft.(?)
I am now programming it into my HT.
BTW. Are you a coastie?
I see your logo.
DW
I am now programming it into my HT.
BTW. Are you a coastie?
I see your logo.
DW
mmckenna
I ♥ Ø
Was, back in the 90's. Not anymore. My wife would probably frown on me acting like a sailor at my age.
oldradioguy2010
Member
I live about 5 mi. for CG station Channel Islands.
Ok kewl
Ok kewl
mmckenna
I ♥ Ø
Nice area. Guy I work with lives down that way.
I spent my time in New Jersey, Alaska and finally in Seattle. I'm north of you now, near Santa Cruz. Hard to stray too far from the ocean.
I never knew that. Unreal.
Channel Islands (California) - Wikipedia
Gotta wonder if a cure to cancer is out there. Then again, if found, big Pharma will shut it down I'm sure.
A full spectrum analyzer might be of use here. But they are mighty pricey.
I tested my garage door opener once and it is indeed in the 300 MHz band. I used my Radio Shack frequency counter. I also remember reading here many years ago how the military was interfering with people's garage doors. LOL
I tested my garage door opener once and it is indeed in the 300 MHz band. I used my Radio Shack frequency counter. I also remember reading here many years ago how the military was interfering with people's garage doors. LOL
oldradioguy2010
Member
Thank you poltergeist.
Just a bit out of my price grade. I have been testing at 300-400 Mhz.
I did find my weather transmitter.
And yes, in Oxnard Ca. A small camp ground is a bird compound known as the largest in So. Cal.
Just a bit out of my price grade. I have been testing at 300-400 Mhz.
I did find my weather transmitter.
And yes, in Oxnard Ca. A small camp ground is a bird compound known as the largest in So. Cal.
One of those $20-30 dollar SDR dongles makes a quick and dirty spectrum analyzer. I've used them on a number of occasions to look for interference and to hunt down the frequencies of specific devices.
Question for oldradioguy2010: Are you interested in determining the frequency of an automotive remote or the RFID frequency of a key or security fob?
oldradioguy2010
Member
Yes. That is my question.
Thank you.
DW
Thank you.
DW
oldradioguy2010
Member
I guess key faub.
Not for security
Common frequencies for automotive remotes are 315MHZ and 433-434MHZ. I'm not as familiar with the automotive passive RFID frequencies. The security industry often uses 125khz. Keep in mind that passive RFID like that used in keys don't have an internal power source and therefore, have no way to transmit on their own. They work in tandem with the receiver that induces a voltage into the key via a transmitting coil that excites the key when it is in close proximity to the receiver.
One of the Navy's fire control radars did that. My ship made sure those were turned off, before we got close to land.
Sent using Tapatalk
During an open house at FCA, the EMC lab had a spectrum analyzer display, showing the 300 MHz range used by most. You could see the spikes, easily.
Sent using Tapatalk
Sent using Tapatalk
- Status
