Guest markhills Posted July 12, 2004 Posted July 12, 2004 I recently discovered that Chinook helicopters bounce microwaves at the ground in order to find out how high they are flying. I have seen this cause of false alarms on microwave only sensors. I wondered if anyone else has whitnessed this phenomenon?
black knight Posted July 12, 2004 Posted July 12, 2004 I can see the call form now reset due to low flying helicopter boucing rays off premises i,m sure the customer (and Police) would be impressed with that one THE BLACK KNIGHT "Any comments / opinions posted are my opinion only and do not represent those of my employer or Company."
Guest markhills Posted July 12, 2004 Posted July 12, 2004 Its one step away from space ships and little green men I know but I was recently carfully discussing this fault diagnosis with a nacoss inspector who said that he had heard of this happening. Probably from another space cadet service engineer like myself!!
black knight Posted July 12, 2004 Posted July 12, 2004 beam me up Scotty (yes i am a star trek fan!! sad but true) THE BLACK KNIGHT "Any comments / opinions posted are my opinion only and do not represent those of my employer or Company."
Guest pactech Posted July 12, 2004 Posted July 12, 2004 I have heard of taxis radios being so powerful to trip radio PA's........
Guest markhills Posted July 12, 2004 Posted July 12, 2004 I have never heard that before. This nacoss inspector I was talking to said that certain types of wireless computer netwok hubs can cause problems. I must investiage that further. I had though that all new products that transmit were meant to be tested in such a way that they do not interfere with existing electronics!
Smart Electrics Posted July 12, 2004 Posted July 12, 2004 Well you have just eplain some problems I have been having with customer well maybe. This sensor in a particular zone keeps activating for no reason whatsoever I have changed the PIR I have replaced spike surpresser and rewired and still now and again it would go off when the alarm is armed. Well I have just twiged. RAF Odiham is just a few miles from the customer and the chinocks use this area for low flying practices and when |I say low flying i mean low flying you can smell the exhaust fumes 2 to 3 minutes after it has been over They must be using the same technology as described the only thing is the sensor is a dual tech type. Well its a possibiliy :!: Ile have to have a word with the flight commander
Guest markhills Posted July 12, 2004 Posted July 12, 2004 I can't explain the pir side of the activation, what dual tech is installed?
Guest Posted July 12, 2004 Posted July 12, 2004 knock knock! whos' there! its the men in white coats come to take you away to the alarm loony bin you need help brother!!!!!!!!!!!!!!!!fit a filter and have yourself a holiday,you been working too hard B) B) B)
Guest Posted July 12, 2004 Posted July 12, 2004 I recently discovered that Chinook helicopters bounce microwaves at the ground in order to find out how high they are flying. I have seen this cause of false alarms on microwave only sensors. I wondered if anyone else has whitnessed this phenomenon? its a bit dangerous init,if one of them microwaves hit me i'll sue,i mean there bloody heavy arnt they,surely the mod could come up with something a bit more hi-tech
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