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Police Forum Police Head Mod: Skidmark
Questions & info about the Motor Vehicle Act. Mature discussion only.

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Old 02-23-2014, 11:22 PM   #1
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Question

Driving tonight and saw 2 polices each holding a radar gun (I assume).
What's the purpose of 2 polices holding 2 radar guns? Shouldn't 1 be enough?
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Old 02-24-2014, 12:10 AM   #2
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Old 02-24-2014, 12:36 AM   #3
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Old 02-24-2014, 07:02 AM   #4
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Maybe because they both wanted to be able to track more than 1 vehicle at a time...instead of taking turns....or maybe because they wanted to monitor speeds from different directions from the same position? Very common to do in stationary operations. I also used to work operations where we used both Laser & Radar.
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Old 02-24-2014, 07:41 PM   #5
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Or perhaps they thought one of the guns wasn't calibrated and were checking it? Or is their an actual procedure for that? Zulu?
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Old 02-24-2014, 08:29 PM   #6
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Calibration for a radar gun is usually by hitting a metal prong that vibrates at a frequency of I think 66.4 MPH IIRC and then pointing the gun at the prong and it should read the same. That's for a stalker radar gun but not sure if the police use the same. I'm assuming they do as they're probably the most used radar guns out.

Zulu can correct me but I assume lasers are on a tripod and radars are handheld?
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Old 02-24-2014, 08:35 PM   #7
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Zulu can correct me but I assume lasers are on a tripod and radars are handheld?
By tripod do you mean sharks?
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Old 02-24-2014, 09:18 PM   #8
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Originally Posted by ProBoostin View Post
Calibration for a radar gun is usually by hitting a metal prong that vibrates at a frequency of I think 66.4 MPH IIRC and then pointing the gun at the prong and it should read the same. That's for a stalker radar gun but not sure if the police use the same. I'm assuming they do as they're probably the most used radar guns out.

Zulu can correct me but I assume lasers are on a tripod and radars are handheld?
Calibration is done by the manufacturer's service centre when the Radar is defective. Testing the speed reading & display ability is done with tuning forks that are tuned to display a pre-determined speed. They are struck so that they vibrate & then held in front of the antenna. The early Lasers like the LTI 20-20 came with tripods but could be hand held by the pistol grip. Later ones mostly came as hand held but could also be used on a tripod. The tripod steadies the Laser & that gives a quicker speed display.
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