ZR4 heads show 3 degrees LOW pattern when level (?)

200V

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I just got a ZR4 system for almost free. So how much can it be improved is my question?
Baseline Start:
So, I set up an optical bench in my garage, with my ZR4 Front head pointed at a vertical door 59 inches away. I zeroed/aligned with laser level and double checked with a bubble level. I used an IR camera, with fixed contrast and brightness settings, to look at the beam pattern projected onto the door..
SURPRISE, the center was about 3.25 inches lower than my laser/level zero mark ! Bad head , maybe (yes, curved "P" side was up, with marked side This Side Up). I didn't have time to try the other Front or Rear head. Next week for that test. I opened up the head and thed LEDS cannot be moved, their based is down on the vetical PCB.
That works out to about 3 degrees low/down if you have the top of the head level. The spread was about 4 degrees left and 6 degrees right to where I estimate the beam was 50% intensity. At 1000 feet with head dead level, the beam center would be projected about 53 feet low, and about 68 feet left of center and 114 feet right of center.
I don't have a LIDAR gun to see if aiming the front heads up 3 degrees helps. Anyone else, can you test this? ( I would also aim each head outward about ~2 degrees, to help the known poor side coverage).

As is photo of IR pattern, ZR4 head is aimed at middle of dark cross 59 inches away (tape on door), dark hash marks are 1 inch apart.:
upload_2018-11-16_10-7-54.png


High contrast image, darkended, with alignment marks, blue lines are 1 inch distance marks:
The 1.3 inch is the width from the center of the LED group to the outside edge Left & Right.
upload_2018-11-16_10-5-7.png

LIDAR signal vs Alert vs Jamming
FYI, this unit only sends out a jamming signal while receiving a LIDAR signal. They alert sounds for about 10 seconds, but the ZR4 heads only transmit when a LIDAR signal is being received. The heads can turn on or off during the alert sounding. There does not appear to be any EXTRA time for heads to be ON when the LIDAR signal stops ( they both go on/off at almost the same time).

How do you know you're going fast? When your Prius starts to drift in turns...

--- DOUBLEPOST MERGED ---

Why so low? I opened up the head and the PCB with the LEDs is tilted forward, in the direction the LEDs face. Therefore, the LEDS are not parrallel to the ground, but are aiming low.
Apparantly there was no jig used to insure the LED pcb is at a 90 degree angle to the base pcb. When soldered, the LED board could be aimed low, horizontal or high. Some of the LEDs had a tiny, tiny space from the PCB, so I gently pushed them up - trying to make them level. This introducing another height/aiming variable - how each LED is soldered onto the vertical pcb. And of course now we have some left/right variation.
At 1000 feet, every 1 degree change equals about 18 feet.
CONCLUSION: The only way to accurately align ZR4 front heads is with an IR camera. I would get as far from a wall as possible, turn on/test the jammer, and vertically align EACH head one at a time (aiming them just above the road/wall interface).
 

DrHow

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Great stuff!

Quality control is essential. What you are indicating they literally have their head in/pointing in the sewer like ERmanagement has been accused of. 50+ feet low is insane. No wonder some of these don’t work. They expect to bounce off the pavement into the LEO? Of course not.

Thanks for test. Soon you will find out how this translates to actual road CM performance. Bet not so good.

What is the beam width? Meaning if a LEO has off axis shot, when do they get outside the CM beam? Or does that matter?
 

Choose Life

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All that system is going to do is waste your time and give you a false sense of security
That system was known when installed correctly to get intermittent PTs against a PL3. A PL3..

LED based parking sensors are no longer relevant against new threats
Save up
Get a good diode based parking sensor
 

DrHow

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All that system is going to do is waste your time and give you a false sense of security
That system was known when installed correctly to get intermittent PTs against a PL3. A PL3..

LED based parking sensors are no longer relevant against new threats
Save up
Get a good diode based parking sensor
Agree on all that. Thanks.

Broader point for me that popped in head... the test he created is great for validating quality control? Or does any of this matter with the latest diode systems?
 

Choose Life

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Agree on all that. Thanks.

Broader point for me that popped in head... the test he created is great for validating quality control? Or does any of this matter with the latest diode systems?
Not sure
What caught my attention was the excitement of getting the system for free
Spending countless hours testing
Now asking for advice to spend more countless hours testing
A system that if in brand new condition is not appropriate to install for today's threats

If this is experimental and only trying to form a hypothesis?
Hypothesize away
As long as your fully informed the system serves no function when in perfect operating condition
 

Transporter

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Nice test setup and the logic looks sound.

But other then that, even for free, why bother with ZR4 since it has been known since 2014 that it will not jam any of the guns manufacture after 2014? The Escort Systems are not worth the time involved to install them in my humble opinion.
 

DrHow

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Not sure
What caught my attention was the excitement of getting the system for free
Spending countless hours testing
Now asking for advice to spend more countless hours testing
A system that if in brand new condition is not appropriate to install for today's threats

If this is experimental and only trying to form a hypothesis?
Hypothesize away
As long as your fully informed the system serves no function when in perfect operating condition
Yea, get that. Excellent logic.

I hope someone who are experts in laser energy properties come along and comment of this type of measurement on install and later is important. Answer my question. Maybe the question is nothing important.
 

The Only Sarge

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I am a gunsmith. People bring me their rifles etc. to crown or thread a barrel. Folks "think" the bore is concentric to the outside of the barrel. Not. Same thing here....folks assume the diodes are concentric to the outside of the case. Not.
 

200V

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Yes, of course it is an exercise - not meant to beat the newest guns. The best ZR4 against the worst DragonEye....

When I can afford an ALP or similar system, I'll use the same benchtop setup to verify how they aim, and use my IR camera to verify this after they are installed.
This weekend I'm testing the receiving head section for it's angle of receptions in vertical and horizontal.
Knowing the beam spread gives us options for height and tow in/out settings in the vehicle.
I just got an oscilliscope, so I'm also going to look at how the LEDs pulse, with different gun PPS rates. Again, just to learn. I'm also curious if all the LEDs flash at once, or do they cyle.
 

RedRocket

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Yes, of course it is an exercise - not meant to beat the newest guns. The best ZR4 against the worst DragonEye....

When I can afford an ALP or similar system, I'll use the same benchtop setup to verify how they aim, and use my IR camera to verify this after they are installed.
This weekend I'm testing the receiving head section for it's angle of receptions in vertical and horizontal.
Knowing the beam spread gives us options for height and tow in/out settings in the vehicle.
I just got an oscilliscope, so I'm also going to look at how the LEDs pulse, with different gun PPS rates. Again, just to learn. I'm also curious if all the LEDs flash at once, or do they cyle.
Here's what the AL-P IR pattern looks like(notice the IR divergence spread from ~1ft spacing distance between Transponder to wall surface). Historically I've always found the lasing Diodes to be internally mounted properly:
 

200V

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Thx Redrocket.
-- Double Post Merged: --
ZR4 receiver detects about 45 degrees angle from center in all directions. I used a straw slid over a transmitting LED to make a pencil beam.
 
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200V

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ZR4 rear detector is also +-45 from center in all directions.
Rear head pattern is 4 degrees LOW (worse than 3 degrees low front heads). Pattern/shape is similar to front heads. So, I'll be compensating for this with my test car mount - and using my IR camera to make sure rear head is aiming level.

Testing LEDs with an oscilliscope: 200hz , 5ms pulse from my LIDAR simulator LEDs = 200hz response from ZR4 head LEDs.
Time to button it up, and install on my car for testing.
 

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ZR4 rear detector is also +-45 from center in all directions.
Rear head pattern is 4 degrees LOW (worse than 3 degrees low front heads). Pattern/shape is similar to front heads. So, I'll be compensating for this with my test car mount - and using my IR camera to make sure rear head is aiming level.

Testing LEDs with an oscilliscope: 200hz , 5ms pulse from my LIDAR simulator LEDs = 200hz response from ZR4 head LEDs.
Time to button it up, and install on my car for testing.
I like all this data you are providing,thanks
Question: can you recommend an inexpensive way to safely view the light pattern. Thanks
 

200V

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I use a Raspberry Pi with a NOIR camera (no IR filter). Plus a 7 inch lcd display.
Any security Camera, baby monitor, with night vision should work - but you need to block the IR emitters. Camera with Analog composite video out is easiest if you have a portable tv with composite video input.
 
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