Oh wait a minute... TC with this little thing you might've opened the door to stand speeding ticket prosecution here on its head:
ticketcombat wrote:Nowhere in the manual does the manufacturer state that this self test proves the device is working properly. Read the manual carefully. You will notice they go to great lengths to AVOID making this claim.
Might be a game-changer. If the manufacturer does not specifically state that the test proves the device is working and accurate, then
I think neo333 just got his defence right there.
Now talking about the radar antenna. The way I read this...
Genesis VPD manual wrote:"The Genesis VPD verifies speed accuracy using synthesized doppler frequencies corrsponding to a series of four simulated speeds: 25, 50, 75 and 100 when in KM/H mode."
...was that there was a built-in device that transmitted signals ("synthesized doppler frequencies") that acted as an electronic tuning fork, so to speak. But if it merely checks the processor and internal components, then yes I fully agree with you. My practical experience has been with weather radar and radar altitude-measuring ("radalt") equipment so there's a bit of a difference, although the principles are the same.
I had to do some thinking about this, and I really would have to look at the manual (are there diagrams available?). Thinking about radar theory and operation... I've come to the conclusion... that the regular old tuning fork test would actually be more reliable than the e-fork. Bear with me, this is going to be painful. 
We know that radar works by sending a signal out from the antenna, signal bounces back, hits antenna, the time of the return = distance (due to known radar signal speed). Then frequency shift (Doppler effect) of return, through calculation = speed. But, the synthesizer would, if it does what I think it does, fire a pre-determined frequency at the antenna which is then picked up and analyzed. The frequency would be set to simulate the same frequency that a vehicle would generate if it were travelling at that speed. Here's the problem: At no point does the radar test an actual signal that was sent outbound from the antenna and then returned to the antenna. So we know the receiver is probably working, but how do we know the transmitter of the radar antenna (not the synthesizer) isn't improperly calibrated and generating an improper frequency that, upon reflection off a car, is giving a higher speed than the vehicle is actually travelling at? We don't! The only thing that would work is the tuning fork, which takes the outgoing signal, bounces it back, and this tests both the receiver and transmitter. The synthesizer is only testing one function of the radar antenna: the receiver. 
Sometimes old technology is the most reliable.
(Sorry about the convoluted explanation. Just got home after a late Newark turn.) 