Garage Door opener dilemma

[Hamster]

Hi All

I'll be honest, I'm thinking about buying a Garage Door remote, a SLD920. What do the collective heads think? What's the chance of being stopped anyway if plods hair dryer shows an error message, would you bother stopping me?

There are some reports of Scamera tawt vans noting vehicles that induce errors, two strikes and I get a home visit, do we think this is true?

Does it affect ANPR cameras, IE will I get chased by one of fifteen marked cars that sit waiting further up the road.

Do we know if they are equally 100% illegal to use and does anyone know of successful prosecutions or are the authorities just trying to dissuade me from getting one.

H

[r5gttgaz]

Dont know about the garage door ones being succesful but this site claims passive jammers are a load of tosh. In america it looks like they aint to sympathetic with people who have them so I would presume there outlawed fully over here too, however it would be unfortunate for the previous owner of the car not to inform you that they had been fitted.

[hanse cronje]

i was advised by a place that sells them that they often get error messages because they hit the road or didn't get a signal returned properly due to some other environmental, so getting one from a jammer isn’t unusual

I suppose they are illegal in that you are preventing an officer from going about his duty or whatever, chances of being caught I’d say very slim

Look at the female fishy smelling private parts that still use mobiles whilst driving, I don’t know of anyone whose been caught

A lot of lasers are used in vans and they ain’t going to crank it up to get you when there are richer pickings.

They only work for a few seconds ie enough to help adjust your speed, then again, it depends what speed you were doing.

Few miles over speed limit may be enough time to adjust, 30/40 over, probably not

APNR no idea

Anyone got a speed gun so I can get it tested to see if it works??

[mybrainhurts]

Of course they work...it's well documented.

Planned legislation will make use an offence...no doubt with points.

[Parrot of Doom]

www.ukspeedtraps.co.uk/laserpropark.htm

[groomi]

Parrot of Doom said:

www.ukspeedtraps.co.uk/laserpropark.htm

Hmmmmm... very interesting. :scratcchin:

With such a large car, a parking sensor would be really handy. And i like the fringe benfits too

[rich 36]

what sort of front do you have on car, the Snooper, I was shown had, IIRC two small 10-fagpacket sized sensors that go behind the radiator grill type thing

>> Edited by rich 36 on Saturday 28th January 17:35

[smeggy]

A jammer will not affect ANPR, SPECS or CC cameras unless the emitters are located on the VRM. Also, such cameras may activate the jammer, hence warning you of their presence.

When setup correctly, the usual error message from an LTI (most popular brand of Lidar) is E03 – slip error. A jammer will cause all sorts of errors to be displayed, everything but an E03. After a few quick successive attempts (up to 3 times per second) at a speed reading, a seasoned operator may realise his equipment has been jammed. They could then pull you and examine your vehicle or flag your VRM on a watch list for future occurences.

The operation and performance of a genuine door opener is wildly different to that of a jammer based door opener. IMO, Intent of obstruction can easily be proven if you’re caught using such a device even if it does open garage doors, then you’ll wish you never used it (a jammer must work really hard in order to successfully jam an LTI, a standard door opener simply isn’t up to the job). However, I don’t know of any successful cases against users of jammers.

[Pigeon]

Like most discharge tubes, HID headlamp bulbs must be run on AC in order to prevent asymmetrical electrode wear, all the "stuff" inside collecting up at one end, and similar nasties. Unlike most discharge tubes, you can't use a "convenient" (kHz or tens of kHz) frequency of AC because there is a problem with exciting acoustic resonances in the discharge - a few hundred Hz is as high as you can go. Frequencies around 62.5Hz, 125Hz or 250Hz would all be good for the bulb, and carry the additional intriguing possibility of heterodyning with the lidar pulses... anyone made any tests on this?

[ylee coyote]

groomi said:

Parrot of Doom said: www.ukspeedtraps.co.uk/laserpropark.htm Hmmmmm... very interesting. :scratcchin: With such a large car, a parking sensor would be really handy. And i like the fringe benfits too

I bought one to assist my parking and it works a treat
Easy to install and well made
the unfortunate "side effects" are well documented and there is a safety off feature which switches the unit off after 8 secs of "interference" to prevent any more
It would seem that all laser speed measuring devices cause interference and the makers have not found one which does not interfere

(I have seen the video's of it in use ...very impressive )

Oh and I got a good deal at the autosport show for one...

[panclan]

I talked to the guy selling the sensors at the autosport show, and he said that it was the only unit that did not show an E03 error, but rather an E01 no lock error

[rich 36]

Pigeon said:

Like most discharge tubes, HID headlamp bulbs must be run on AC in order to prevent asymmetrical electrode wear, all the "stuff" inside collecting up at one end, and similar nasties. Unlike most discharge tubes, you can't use a "convenient" (kHz or tens of kHz) frequency of AC because there is a problem with exciting acoustic resonances in the discharge - a few hundred Hz is as high as you can go. Frequencies around 62.5Hz, 125Hz or 250Hz would all be good for the bulb, and carry the additional intriguing possibility of heterodyning with the lidar pulses... anyone made any tests on this?

'Hate it when that happens, actually'

still this was to be my next, point

[smeggy]

panclan said:

I talked to the guy selling the sensors at the autosport show, and he said that it was the only unit that did not show an E03 error, but rather an E01 no lock error

I’m surprised someone selling such devices would admit to such a howler; I would much prefer to force an E03 each and every time (see my previous post)

[smeggy]

Anyone who doesn’t want to see sciency ramblings should turn away now……..

Pigeon said:

Like most discharge tubes, HID headlamp bulbs must be run on AC in order to prevent asymmetrical electrode wear, all the "stuff" inside collecting up at one end, and similar nasties. Unlike most discharge tubes, you can't use a "convenient" (kHz or tens of kHz) frequency of AC because there is a problem with exciting acoustic resonances in the discharge - a few hundred Hz is as high as you can go. Frequencies around 62.5Hz, 125Hz or 250Hz would all be good for the bulb, and carry the additional intriguing possibility of heterodyning with the lidar pulses... anyone made any tests on this?

Lidar’s maximum window of acceptance (for receiving the reflected pulses) is very narrow (7uS) and rapidly becomes extremely narrow as it acquires the target distance (down to around 1nS in the first 4 or 5 samples). At those frequencies, the chance a HID bulb radiating a significant change of intensity during the widest possible window is very remote – 1 in 500 for a clean edge. Also, the LTI can discard up to 5 samples which don’t tally up with the rest and it will still give a valid speed reading.

HID lamps emit very little IR; this is the main reason why they are more efficient. Conversely, the radiated intensity of incandescent (filament) lamps of the tungsten/halogen variety peak at ~1000nm, very close to the operating wavelength of Lidar of 905nm. Hence it may be more effective to drive around with cheap bulbs at full beam and try to saturate the Lidar sensor diode (yes that can happen).

You might have guessed I’m not that optimistic about the idea

[Pigeon]

Oh, bollox

[mybrainhurts]

smeggy said:

Hence it may be more effective to drive around with cheap bulbs at full beam and try to saturate the Lidar sensor diode (yes that can happen)

Right then, where did I put those Apollo Turinis...?

[smeggy]

For info:

The LTI displays a special error message for when it detects countermeasures (jammers) – E07

Operators are being made aware of this and have been pulling drivers who trigger this error message; unfortunately I don’t know what happens with them.

[Tonyrec]

smeggy said:

For info: The LTI displays a special error message for when it detects countermeasures (jammers) – E07 Operators are being made aware of this and have been pulling drivers who trigger this error message; unfortunately I don’t know what happens with them.

Ive never heard about this before........and there was me thinking i was a bad shot.

Seriously though, i will look into this and let you know.

[Hamster]

Been out for a drive today, I could save £200 just by not getting the car washed, make it really, really dirty, like some I saw today!!

Then the vans can't read the plates. Has anyone been stopped for having an unreadably dirty reg number?

Mrs H doesn't like the notion of a jammer!!

H

[timsta]

Hamster said:

Been out for a drive today, I could save £200 just by not getting the car washed, make it really, really dirty, like some I saw today!! Then the vans can't read the plates. Has anyone been stopped for having an unreadably dirty reg number? Mrs H doesn't like the notion of a jammer!! H

Um, I believe the levy for an obscured plate is upto £1000, whereas a missing plate is only £30.

Those darned plate fittings.