1. ## 9500i Lockout question

I believe modern police radar works on a doppler effect, (i.e. the expansion and contraction of the sine wave) essentially measuring the change in return frequency from the initial transmission frequency. So, as you drive at a false, then away from it you don't have an exact frequency. Rather you have a range of frequency, and that range will be larger as your speed increases. Not to mention the associated ghosting of those signals, further increasing this frequency range. Also, according to test done by the Veil guy and others, no two belscorts read the same frequency in spec mode for a given source. Taking these factors into account, the 9500 must be locking out a fairly large range in the K and X bands for each false it recieves. Now in a downtown area with many simultanious falses, is the detector locking out a majority of the two bands? Also, for what distance is it blocking the chunks of the frequency band? Sorry if this question seems longwinded or irelivent.

2. ## Re: 9500i Lockout question

Originally Posted by bigb3500
I believe modern police radar works on a doppler effect, (i.e. the expansion and contraction of the sine wave) essentially measuring the change in return frequency from the initial transmission frequency. So, as you drive at a false, then away from it you don't have an exact frequency. Rather you have a range of frequency, and that range will be larger as your speed increases. Not to mention the associated ghosting of those signals, further increasing this frequency range. Also, according to test done by the Veil guy and others, no two belscorts read the same frequency in spec mode for a given source. Taking these factors into account, the 9500 must be locking out a fairly large range in the K and X bands for each false it recieves. Now in a downtown area with many simultanious falses, is the detector locking out a majority of the two bands? Also, for what distance is it blocking the chunks of the frequency band? Sorry if this question seems longwinded or irelivent.
OK first, the doppler shift you would get from driving towards or away from a false alert source is way to small to be relevant here. To be somewhat practical, you would get around 7 KHz doppler shift for K-Band at 100 MPH.

As for the rest of your questions though, you're definitely on the right track: they are certainly blocking out a range. For some of my guesses on this, see my post in this thread:

My guess was that it is blocking out 16-18 MHz segments of K-Band. But for what it's worth, I've heard through the grape vine that the sizes of the segments that get locked out might actually be larger than I guessed, perhaps even twice as large. Maybe I'll verify the size of the segments for certain once I have a chance to test one of these on the bench, if someone else doesn't do it first.

Jim

3. Here's a reply I received from Escort Support regarding the lockout feature, NavAlert and the USB port...

"It is good to hear from you! The locked out area is approximately one
square mile. The 9500i locks out specific frequency in specific locations.
If
a police officer is using a radar gun in an area where you have locked
out a motion sensor in a store, the radar gun's frequency will be
different and the detector will alert you to it.

Regarding NavAlert, the USB port on your 9500i will, in the future,
other similar threats that are difficult to detect. This concept is

Thanks for your interest in Escort!"

This in addition to the registration card that comes with the 9500i that states..."As an added benefit, you will be able to download and install software updates directly from our website".

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