Radar detector/scrambler

It isn't that simple. Police RADAR works by Doppler effect. I.E., the returned signal is mixed with with a sample of the transmitted frequency. The difference in frequency tells your speed. Any attempt to jam it will be a crap shoot. Even if you managed to match the RADAR transmitter's frequency, it would still show your speed.

Military RADAR is RAdio Detection And Ranging, or a means to bounce a signal off metallic objects, and time the reflection to measure the distance. The rotating antenna gives you the heading. Some also change the vertical angle to give the elevation of a target. I've serviced both types.

You know the frequency of the signal you receive. You know your speed. Assuming you could build a circuit to compute the necessary bits, you should have little trouble computing the original transmitted frequency with those two bits of information. The simply transmitting the same frequency back should result in the desired result of a lower reading.

PeterD wrote in news: snipped-for-privacy@4ax.com:

the active jammers I've seen program a set freq. shift to give a lesser speed reading at the radargun. they had a switch to change it for different speed zones.The jammer's stronger direct signal overwhelms the weaker reflection of the gun's signal.

But white noise is broadband,so a radargun would not be able to make any comparison to the transmitted freq. with a "white noise jammer" It would raise the noise floor ABOVE the reflected signal,smothering it. I believe I've seen references to radarguns having an indicator for "jamming",and their audio output would also be an indicator,operators being trained to recognize interference.

Do you know the angle the RADAR transmitter is coming from? Also, if the display is obviously wrong, the cop will know you are using ECM to avoid a ticket.