Origin B2 triggered by range Rover brake lights

[streaky]

Naturally, it scares the sh1t out of me every time it happens, but my B2 goes off occasionally with a "LASER" warning when there is clearly no talivan or other (obvous) source of LASER around.

After much observation, I think I've narrowed it down to Range Rover brake lights triggering it.

Has anyone else had this problem?

Streaky

[slinksport]

Could be well wide of the mark here, but is this only New Range Rover brake lights?? I ask as I seem to remember that they're LED based.. could they be creating some form of EM interference that is causing the B2 to go off?

[puggit]

As I posted on another thread today - with my Bell detector I do get laser warnings from overhead traffic censors on motorway bridges.

[pdV6]

streaky said:

my B2 goes off occasionally with a "LASER" warning when there is clearly no talivan or other (obvous) source of LASER around. After much observation, I think I've narrowed it down to Range Rover brake lights triggering it.

Sounds like fun - if you had a blinder rigged up, it would shoot back and if they had a detector installed it would probably cause them to brake again... ad infinitum until you were both at a standstill!

Moral of the story: Immediately overtake all Range Rovers as soon as they appear!

[cptsideways]

Chuck it in the bin,

By the time you have reacted (0.6 secs) to a laser alert it's already got you in 0.3 secs I'm afraid

>> Edited by cptsideways on Wednesday 2nd June 10:32

[Tafia]

streaky said:

Naturally, it scares the sh1t out of me every time it happens, but my B2 goes off occasionally with a "LASER" warning when there is clearly no talivan or other (obvous) source of LASER around. After much observation, I think I've narrowed it down to Range Rover brake lights triggering it. Has anyone else had this problem? Streaky

OK it's not laser but I have had radar alerts on my Bel 980 from the back of some farm tractors in open countryside.

I followed one for a few yards once and when it turned off, the alert stopped. How very flippin' odd.

[streaky]

slinksport said:

Could be well wide of the mark here, but is this only New Range Rover brake lights?? I ask as I seem to remember that they're LED based.. could they be creating some form of EM interference that is causing the B2 to go off?

Humm! Must be more observant! Didn't realise that, I'll take notes - S

puggit said:

As I posted on another thread today - with my Bell detector I do get laser warnings from overhead traffic censors on motorway bridges.

I saw that, but this happens where there are no bridges, no traffic sensors/census/whatever ... just Range Rovers - S

cptsideways said:

Chuck it in the bin, By you have reacted 0.6 secs say to a laser alert it's already got you in 0.3 secs I'm afraid

Why chuck it in the bin? I didn't say that was all that was operating - S


>> Edited by streaky on Tuesday 1st June 23:14

[Pigeon]

Tafia said:

OK it's not laser but I have had radar alerts on my Bel 980 from the back of some farm tractors in open countryside. I followed one for a few yards once and when it turned off, the alert stopped. How very flippin' odd.

Some tractors have radar. Yes, really. It seems to be a Doppler radar to measure ground speed accurately so they can spread seed dead evenly. Any farmers on here to say why this isn't totally over the top?

slinksport said:

Could be well wide of the mark here, but is this only New Range Rover brake lights?? I ask as I seem to remember that they're LED based.. could they be creating some form of EM interference that is causing the B2 to go off?

LEDs will be emitting less IR than normal incandescent bulbs by quite a long way...

[Flat in Fifth]

Pigeon said:

Some tractors have radar. Yes, really. It seems to be a Doppler radar to measure ground speed accurately so they can spread seed dead evenly. Any farmers on here to say why this isn't totally over the top?

Isn't this part of an integrated system to maximise yield? ie Combine uses GPS locator to measure crop yield per sq metre so that sowing seed, fertilizer what have you can be arranged appropriately.

You can't have it both ways FFS!

Farmers trying to use technology to operate as efficiently as possible are criticised.
Farmers not using technology are criticised as being inefficient and cluttering up roads burning red diesel.

Which do you want?

[cptsideways]

Ah streaky now were talking, in that case yes it's worth having

[Roop]

My Snooper SD815iS LASER alert has been set off by the LED third brake lights of a 996 Turbo I was following once. Every time he braked, it went mental.

Both my LASER alert on the above AND my SLD920 LASER diffusers get set off my the rotating RADAR antenna at Blackpool Airport. Park up with the car facing the antenna and precisely on each rotation the diffusers fire and the detector goes apeshit. I think perhaps they have some IR device of there as well as the RADAR (perhaps for testing visibility or something, I don't know)

Roop

[WMHV70]

Roop - you do know getting too close to emitting radar can poach your n*ts and make you sterile, don't you...

Although if you're in a car, I assume that (a) you're not getting too close, and (b) the car MAY provide some protection (although it may equally serve to magnify the EMP radiation)...

[Tafia]

Pigeon said:

Some tractors have radar. Yes, really. It seems to be a Doppler radar to measure ground speed accurately so they can spread seed dead evenly. Any farmers on here to say why this isn't totally over the top?

Many thanks; another mystery solved.

[Tafia]

WMHV70 said:

Roop - you do know getting too close to emitting radar can poach your n*ts and make you sterile, don't you...

So that's why I get a warm glow when I walk through the automatic doors in the local supermarket!!

[malman]

I seem to remember somewhere that the new LED brake lights are pulsed to produce dimmer/brighter light patterns. Could this not be triggering the laser detector. I would think that the detector is not tied too tightly to a specific wavelength to cater for different types of laser equipment but probably looks for pulsed light then screams.

I'm assuming here that laser speed traps use a pulsed laser for measurement.

Disclaimer
I know nothing about the inner workings of any laser based speed trap equipment so the above could be complete bollocks

[Pigeon]

Shake your head from side to side when looking at them... if you see streaks they're continuous, if you see dots they're pulsed. And it is conceivable that the pulsing could trigger a detector.

[streaky]

Pigeon said:

Shake your head from side to side when looking at them... if you see streaks they're continuous, if you see dots they're pulsed. And it is conceivable that the pulsing could trigger a detector.

Tried that! Unfortunately Status Quo were playing on the radio and I could only shake my head up and down ... would that work too? - Streaky

[dcw@pr]

Pigeon said:

Some tractors have radar. Yes, really. It seems to be a Doppler radar to measure ground speed accurately so they can spread seed dead evenly. Any farmers on here to say why this isn't totally over the top?

sorry to revive the old thread...

the reason for the radar speed measurement is because when you're driving on a muddy field you get a lot of wheel slip, so measuring speed by the engine/gearbox/wheel speed won't actually be the same as your ground speed, which is the important thing

[Pigeon]

Sure. I was just somewhat amazed that it made that much real difference, and was so widespread. Personally, I'd have just taken a speedo drive off a non-driven wheel. That not good enough?

[streaky]

Pigeon said:

Sure. I was just somewhat amazed that it made that much real difference, and was so widespread. Personally, I'd have just taken a speedo drive off a non-driven wheel. That not good enough?

Many modern tractors are all-wheel drive ... unlike the Massey-Harris I drove on my grandfather's farm (had my first RTA driving it when I managed to overturn a trailer-load of onions whilst avoiding the local bus ... I was 14 !) - Streaky