Important: Head Positions on your ALP Install.

[awj223]

My understanding is that a single head is enough for some guns... Probably when it comes to the variable pulse rate guns, you need two heads.

I cannot remember the reason behind recommendations against vertical mounting.

The beam pattern of the head is more horizontal than vertical, when mounted properly. You don't want to mount vertically because the head will be throwing a lot of IR up toward the sky and down into the road (which isn't the main problem) and not so much IR toward the sides (which IS the main problem). Jamming requires that the IR from the jammer reach the gun with sufficient intensity to confuse it. If you are putting the main beam pattern in an up/down fashion, you won't properly jam off-axis shots. Also, the receiver might be designed to catch shots to the sides (when mounted properly) more so than up and down.

See the beam pattern here:

[RedRocket]

My understanding is that a single head is enough for some guns... Probably when it comes to the variable pulse rate guns, you need two heads.

I cannot remember the reason behind recommendations against vertical mounting.

The beam pattern of the head is more horizontal than vertical, when mounted properly. You don't want to mount vertically because the head will be throwing a lot of IR up toward the sky and down into the road (which isn't the main problem) and not so much IR toward the sides (which IS the main problem). Jamming requires that the IR from the jammer reach the gun with sufficient intensity to confuse it. If you are putting the main beam pattern in an up/down fashion, you won't properly jam off-axis shots. Also, the receiver might be designed to catch shots to the sides (when mounted properly) moreso than up and down.

See the beam pattern here:

Member awj223 gets it correct. Here is another video I made in late 2013 just after the AL-P was introduced & I was one of the earliest adopters... (Yeah, I think ECMExpert was the only one who bought before me.)

p.s. - BTW, that small vertical dot above the IR pattern is the output of a TSS used to trigger the AL-P Sensor to fire.

[Redmoto]

Ideally you mount sensors horizontally. But we've tested many BMW (car) with vertical grill (///) mounting and they work just as well as horizontal mounting.
This is due to the circularly polarized laser jamming diode. However, the bubble on the lens over the laser detection is designed to cover wider angle horizontally.
This is what I was told.

[BestRadarDetectors]

Ideally you mount sensors horizontally. But we've tested many BMW (car) with vertical grill (///) mounting and they work just as well as horizontal mounting.
This is due to the circularly polarized laser jamming diode. However, the bubble on the lens over the laser detection is designed to cover wider angle horizontally.
This is what I was told.

The laser diode is not circular and because they are shooting in the videos basically on axis it works but shoot 15+ degrees off axis you will get lots of PT'S with verticle mounted heads.

[modsl55amg]

Every car is different and its best to post a photo and have us make some recommendations. As a rule I would not space them over 24" apart from each other.

Tom/BRD, Please take a look at the attached picture of my SL55 AMG, and let me know your feelings about the two ALP sensors mounted in the front upper grill.

The distance from the center of one receive bubble to the center of the other receive bubble is 26 inches.

The distance from the closest edge of one sensor to the closest edge of the other sensor is 23 inches.

The distance from the center of each receive bubble to the farthest edge of each headlight housing is 20 inches.

The distance from the center of each receive bubble down to each fog light in the lower grill is 18 inches.

The front license plate will be lowered under the front bumper at all times when driving.

I realize that performance during a test session will be the true judge of the sensors placement, but what are your thoughts by just looking at them, taking into consideration the measurements provided?

Thank you in advance for your advice.

[BestRadarDetectors]

Your install is fine for the area you live in. If you lived in GA for example I would tell you to either bring them a bit closer or add a 3rd head.

[RedRocket]

Your install is fine for the area you live in. If you lived in GA for example I would tell you to either bring them a bit closer or add a 3rd head.

DragonEye Lidars have been seen in Delaware !

[SurrealOne]

I think after reading the a few post that I might need to change the driver side head and flip it over so the bubble is on the outside.

[RedRocket]

I think after reading the a few post that I might need to change the driver side head and flip it over so the bubble is on the outside.

I think not, the 1" difference it makes would have negligible effect on performance.

[modsl55amg]

Tom/BRD, Please take a look at the attached picture of my SL55 AMG, and let me know your feelings about the two ALP sensors mounted in the front upper grill.

The distance from the center of one receive bubble to the center of the other receive bubble is 26 inches.

The distance from the closest edge of one sensor to the closest edge of the other sensor is 23 inches.

The distance from the center of each receive bubble to the farthest edge of each headlight housing is 20 inches.

The distance from the center of each receive bubble down to each fog light in the lower grill is 18 inches.

The front license plate will be lowered under the front bumper at all times when driving.

I realize that performance during a test session will be the true judge of the sensors placement, but what are your thoughts by just looking at them, taking into consideration the measurements provided?

Thank you in advance for your advice.

Tom (BRD), and other members: "IF" I were to add a third ALP sensor, and kept the original two ALP sensors in their present positions, where would you suggest the third ALP sensor be placed?