Last edited by <<JAZZY>>; 04-28-2009 at 06:18 AM.
so much data, so little information.
Let's start with the behaviour of OTHER detectors. From your collection, I'm SURE you have experimented; establishing more of a base-line. I imagine they reacted similarly.
Careful review of footage shows a Pole Mounted gizmo 30-50ft ahead of you, just as the alert starts. I don't know if they are related, but if not, need to be eliminated
A little [Google]perusing yielded these seemingly related goodies:
SPEED MONITORING WITH INDUCTIVE-LOOP AND OTHER POINT SENSORS
Chapter 3, Traffic Detector Handbook: Third Edition--Volume I, FHWA-HRT-06-108 near the top of the page
it's a fairly old concept; but with more modern sensors, speed thresholds can be determined, and that data can be passed on to other equipment.
speaking of an I/O speed sign:
(pardon the verbage, it's copy/paste)
"Speed Display Sign’s radar works in pulse way, the advantages for pulse way are: low radiancy, low power consumption and anti-radar prevention, as well, radar’s susceptivity can be adjusted according to road and vehicle’s situation."
Radar Speed Display Sign DN-SDR2A-1B Products Donartech
Yes, it's a pitiful translation; but demonstrates that these units do exist.
well its raining here so i dont think ill be going after the pics today
Bel STiR
escort 9500ci
So it really might have a loop in the ground!
It may only spew RADAR if you are over the PSL. Starting from like 100 feet before the sign, were you ever over the PSL?
I had a similar problem with a single X band door opener at a local grocery store. The door was erratic (you really had to move to make it open), and the X band door opener would cause my V995 to throw a Self Cal error if I powered it up in the store's parking lot or if my V995 just happened to do a self calibration while anywhere near this door opener. I finally figured out that this particular door opener had flaky power connections, and this door opener frequently caused Ka falses on my V995.
Anyway, time went by and I always made sure to turn off my V995 before turning into this grocery store's parking lot. I even did the same with my newly purchased STi, except the final day before I sent my STi to Bel to be flashed with the 33.8 bugfix. Unbeknown to me, during the very two weeks while my STi was at Bel the grocery store replaced all of their X band door openers with nice little K band door openers. Consider my surprise when I thought that my reflashed STi was dead on X band!
So, as you can see, I strongly suspect that the particular speed sign which MPS is dealing with has a radar antenna which is operating improperly, and that this is why MPS's 9500ci doesn't alert to it until its signal strength is strong enough to saturate the antenna so that the antenna can't see its slight but very rapidly and randomly changing K band frequency.
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