In the testing I did here:
http://www.radardetector.net/viewtopic.php?t=25754
It shows a lockout segment size of about 30 MHz, NOT 300 MHz. And note that this isn't simply +/- 15 MHz, the segments are pre-defined.
For Truelock, as far as I can determine K-Band is split into eight segments of 31-32 MHz, like so:
http://img91.imageshack.us/img91/1430/image1mf4.gif
The 9500i sweeps a bit beyond the police K-Band to ensure that the police K-Band is covered even if there is a bit of oscillator drift. The numbers inside the green segments represent what would be displayed in Tech mode for a signal that falls anywhere in that segment (for more on this see
here).
If one were to lock out a signal at a particular location, 24.151 for this example, the segment shown in red would be locked out:
http://img145.imageshack.us/img145/2522/image2mr1.gif
In this example, the locked out segment covers approx. 24.150-24.181. At that location, if a signal is detected in that range, the 9500i would not alert.
24.151 is on the lower edge of the segment. So, if the signal source you locked out drifted in frequency slighty to 24.149, then the 9500i would alert to it since it would fall into the "24.134" segment.
One thing that confuses people with Truelock is that they assume that Tech Mode has a lot better resolution tha it actually does. Per the examples and because of the way the segments work, with the 24.165 segment locked out, the detector might show 24.134 but doesn't display another frequency until 24.197, 63 MHz away. This might lead people to believe that a larger segment is locked out, when in reality it is only ~30 MHz.
But it gets more complex.
Of course you will see some different numbers for Tech display. As the detector drifts and self-calibrates, the actual frequency area that gets swept changes slightly, as does the frequencies displayed in tech display. In the example below, the area swept is shifted slightly in relation to the actual police K-Band, but the whole band is still being swept. But, the segment sizes do not change.
I don't know all the details, but below is my concept of how this might work:
http://img120.imageshack.us/img120/280/image3db3.gif
Notice the green swept area is shifted in relation to the actual police K-band, and the Tech mode numbers have changed by 5 MHz. But, the whole police K-and is still being swept because of the slight oversweep. At some point, the detector would self-calibrate and this would be centered a bit better, or could be offset slightly the other way.
So, you'll see some different frequencies displayed for Tech mode although the segment sizes do not change.
Another thing that confuses people about Truelock is that there is a lot more things happening with the software than meets the eye. For example, in my testing videos, I demonstrated that the 9500i remembers past signals detected at a given location for a certain period of time, and if a subsequent signal is detected at that location and you lock it out, then it doesn't only lock out the signal the 9500i is alerting to at tht present time, but also could be locking a previous signal detected at that location that is no longer present.
Jim
