astro
October 9, 2003, 7:49pm
3
Let’s try again -
Does this explanation of how it works make sense RF engineering wise?
How to make your car invisible to radar and laser!!
Today, Rocky Mountain Radar offers drivers a perfect solution to speed traps—the Phazer II. It uses a passive radar scrambler to make your automobile electronically “invisible” to police speed-detecting equipment. The radar component works by mixing an X, K or Ka radar signal with an FM “chirp” and bouncing it back at the squad car by way of a waveguide antenna, effectively confusing the computer inside the radar gun.
Perfectly legal in most states. Some radar devices have been outlawed because they transmit scrambling radar beams back to the waiting law enforcement vehicle. The Phazer II, however, reflects a portion of the signal plus an added FM signal back to the police car. This, in effect, confusing the waiting radar unit. Best of all, unless you are a resident of California, Minnesota, Nebraska, Oklahoma, Virginia, Utah, or Washington D.C., using the Phazer II is completely within your legal rights.
How it scrambles radar. Police radar takes five to 10 measurements of a vehicle’s speed in about one second. The Phazer II sends one signal that tells the radar the car is going 15 m.p.h. and another signal that the car is going 312 m.p.h. Because police radar can’t verify the speed, it displays no speed at all. To the radar gun, your car isn’t even on the road. The Phazer II begins to scramble radar signals as far as three miles away from the speed trap. Its range of effectiveness extends to almost 200 feet away from the police car, at which point you should be able to make visual contact and reduce your speed accordingly. Works with laser, too! The Phazer II uses light-emitting diodes (LEDs) to fire invisible infrared pulses through the windshield. Laser guns interpret those pulses as a false indication of the car’s distance, blocking measurement of your speed
Nuke
October 9, 2003, 8:11pm
4
Q.E.D
October 9, 2003, 8:29pm
5
Though individal states may not have laws agains this device, it is, in fact, illegal per the FCC . In part:
We also reject Rocky Mountain Radar’s argument that its device qualifies as exempt from equipment authorization under Section 15.103(a). We find that this exemption is not applicable in this case. The exemption applies only to digital devices utilized exclusively in any transportation vehicle including motor vehicles and aircraft. Section 15.3(k) defines a digital device, in relevant part, as an unintentional radiator (device or system) that generates and uses timing signals or pulse rates at a rate in excess of 9,000 pulses (cycles) per second and uses digital techniques. 47 C.F.R. 15.3(k). The Spirit II is not an unintentional radiator and does not generate pulse rates in excess of 9,000 pulses per second. Further, Rocky Mountain Radar has not demonstrated that its device would be used exclusively in transportation vehicles. Accordingly, we reject Rocky Mountain Radar’s argument that the Spirit II is exempt from equipment authorization pursuant to Section 15.103(a).
astro
October 9, 2003, 8:35pm
6
In looking further apparently one guy has an entire page devoted to why the Phazer is essentially a scam
Rocky Mountain Radar Detector Scam.
Scam, Scam, Scam.
He says it’s a passive jammer, to make it legal. It is legal to sell a passive jammer, since it really jams nothing.
The Radar Community is sharply divided on many things, Rocky Mountain Radar isn’t one of them.
Q.E.D
October 9, 2003, 9:18pm
8
But it’s not legal. Read my link above. The FCC memorandum menstions a different model, but it’s still the same “passive jammer” technology. The upshot is, the FCC will not allow Rocky Mountain Radar to market these devices because they are intended to interfere with licensed RF frequencies.
‘Passive jammer’ ?
How can something be passive and yet ‘reflect’ additional FM components.
You can only reflect the original back, adding anything to it requires transmission.
The only true passive jammer would have to be something that completely absorbed or scattered the transmitted signal.