The Vector series all have the same performance. This is one thing that the Vector 940 is such a bang-for-the-buck choice. Quite sensitive, but just doesn't have all the display or filtering options of the other Vectors.
http://www.radardetector.net/wiki/in...ics_Vector_940
Now the real question is whether your 940 is operating correctly or not. In order to test it, the test must be:
- measurable
- measured against a recognized source for its design
- repeatable
- have a "control" test
It's one thing to notice that it doesn't alert to the local 7-Eleven any more. But then again, the 7-Eleven's automatic door opener is not anything that would be reliable to staying on the same frequency, power output, etc. Sure, I do it though, I expect my Vector to give the same false alert every day and if it didn't, it would raise an eyebrow for me to investigate further. Even a radar sign isn't reliable. Annoying, yes, but the signs in my town will vary in their frequency at different times.
Unfortunately, for many of us, we don't have a calibrated radar gun in each frequency with which to test. So other things can help give us a hint.
Other detectors, do they detect the same sources, such as the radar sign? Is this repeatable by your Vector 940 and the other detector? Of course the another detector such as a Whistler or something wouldn't detect in the same way or measure the same strength. So we're still eyeballing it.
If you're finding repeatable indications that K-band is off, then your 940 may require a trip to the factory. Even out of warranty purchases are generally fixed up for a fee. I think it's around $60, which includes return shipping.
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