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These are getting used more and more, they are being used by drug runners as well as criminals breaking into stores/homes
They will jam all cell signals as well as wireless cameras such as ring and other home systems, all cop radios and more
https://www.jammer-store.com/camera-blockers-jammers/
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Bet it won't jam my 12 gauge. Plus, I have a landline phone.
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I looked up the frequency used by ring and similar devices. 2.4ghz.
I don't know what power level it would take to jam them, but it must not be too high. Imagine 50 watts of microwave in your hands.
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The jammer would only have to put out a little more than the device being jammed, if it's in reasonable proximity. The receiver is going to look at the strongest signal. The jamming signal would have to be somewhat broadbanded to cover the various frequencies within the 2.4 gHz band.
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(11-30-2023, 02:09 PM)olfart Wrote: The jammer would only have to put out a little more than the device being jammed, if it's in reasonable proximity. The receiver is going to look at the strongest signal. The jamming signal would have to be somewhat broadbanded to cover the various frequencies within the 2.4 gHz band. The link said it jammed police radios too. Usually those are 2m or 440mhz. That would be broadband for sure.
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If I recall, it had 3 or 4 antennas on it, one for each band it's supposed to block. So it has a separate transmitter for each antenna. Big city police agencies use trunked 800 mHz systems, which would be a lot harder to block.
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(12-01-2023, 09:06 AM)olfart Wrote: If I recall, it had 3 or 4 antennas on it, one for each band it's supposed to block. So it has a separate transmitter for each antenna. Big city police agencies use trunked 800 mHz systems, which would be a lot harder to block. It's been a long time since I heard about trunk systems. Don't they continuously change frequency? If so, that sounds impossible to jam.
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Yes, the trunked systems hop frequencies frequently. That was one of the issues Motorola was having trouble with as transmitter and receiver have to make the same hop at the same time.
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(12-02-2023, 10:55 AM)olfart Wrote: Yes, the trunked systems hop frequencies frequently. That was one of the issues Motorola was having trouble with as transmitter and receiver have to make the same hop at the same time. If I'm remembering right the set has a receiver that receives a control channel that orchestrates the jumps, and a receiver that handles the actual frequency change and communications part. Gross oversimplification of that I'm sure.
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