[FURIOUS] ALP is only jamming when signal is detected

[hussein]

Just for clarification, it detects the first pulse and in a matter of (which unit goes here?) seconds before the next pulse comes it (matches or calculates cancellation pulses?) and jams?

While I recently became aware of the smart method, I still don't completely understand it. Perhaps this is a topic for a new thread.

[Mirage]

Just for clarification, it detects the first pulse and in a matter of (which unit goes here?) seconds before the next pulse comes it (matches or calculates cancellation pulses?) and jams?

While I recently became aware of the smart method, I still don't completely understand it. Perhaps this is a topic for a new thread.

Yep start a new thread in advanced and it can be discussed.

[orwellophile]

so what happens when you get close enough that the beam no longer impacts the sensor, I don't see how you could get JTG.

the beam width of the lidar could easily miss the sensor, especially if u put two sensors midway between plate and headlights. (not something I'd ever do, but it's done)

as for keeping sync with the lidar, I've read the patents, it knows the pulse rate, and constantly adjusts for minor variations caused by changes in velocity, it can adjust it again next time it measures two pulses. in the mean time. it can either keep the last freq or apply the last known delta velocity "blindly" . it can't be worse than sending nothing

Hussein, yes I'd be happy to supply some diagrams if not actual sampled data for a new thread.

[beingaware]

I don't think I have ever seen a pt with alp not firing while in unlimited mode, tracking target from 900m right to 5m. It didn't miss a beat even with stop start stop start with my stalker.
Alp heads are pretty sensitive.
I've shot street signs 500m in front of my car while driving and they have gone off.
Same with just aiming for my front right headlight with all heads covered apart from the front left at 5m up to 200m and it still reacts.
Your ideas while maybe valid with older jammers, do not apply to current gen smart jammers.
Hell I ever detect poliscan units at 400-500m back due to scatter.
And no one is going to keep speeding once targeted, by the time Mr poo poo fires at another target, you would hopefully be under the psl.


But in all fairness, test your self and you will see what we have experienced with our own testing.

Looking forward to hearing back for you.

[awj223]

so what happens when you get close enough that the beam no longer impacts the sensor, I don't see how you could get JTG.

the beam width of the lidar could easily miss the sensor, especially if u put two sensors midway between plate and headlights. (not something I'd ever do, but it's done)

as for keeping sync with the lidar, I've read the patents, it knows the pulse rate, and constantly adjusts for minor variations caused by changes in velocity, it can adjust it again next time it measures two pulses. in the mean time. it can either keep the last freq or apply the last known delta velocity "blindly" . it can't be worse than sending nothing

Hussein, yes I'd be happy to supply some diagrams if not actual sampled data for a new thread.

I believe once they detect LIDAR, jammers will send a few pulses by keeping the timing of the last few pulses received and sending out the some pulses "blindly". But then they stop to sample the incoming pulses again (it's very hard to transmit and receive signals at the same time, and in fact, if the transmitted pulse comes at the exact same time as the received pulse, the transmitter would likely overwhelm the receiver and you wouldn't be able to tell the difference between your own pulse and a pulse from the LIDAR gun). So it can be worse than sending nothing, because you could miss some incoming pulses and fail to jam the gun at all.

But remember that:
1. The timing of the returned pulses must be accurate to within nanoseconds in order to jam the gun
2. Sending "a few" pulses (say, 10-20) to a gun that's operating at, say, 200pps, would take only 0.05 to 0.1 seconds. It's extremely hard for humans looking at a flashing LED to perceive this. Sending out more pulses beyond that is likely to be useless without resetting the time reference by receiving more pulses. Remember, the inter-pulse spacing is a few milliseconds and the returned pulses must be accurate to within nanoseconds.

[Yellowcab]

I believe once they detect LIDAR, jammers will send a few pulses by keeping the timing of the last few pulses received and sending out the some pulses "blindly". But then they stop to sample the incoming pulses again (it's very hard to transmit and receive signals at the same time, and in fact, if the transmitted pulse comes at the exact same time as the received pulse, the transmitter would likely overwhelm the receiver and you wouldn't be able to tell the difference between your own pulse and a pulse from the LIDAR gun). So it can be worse than sending nothing, because you could miss some incoming pulses and fail to jam the gun at all.

But remember that:
1. The timing of the returned pulses must be accurate to within nanoseconds in order to jam the gun
2. Sending "a few" pulses (say, 10-20) to a gun that's operating at, say, 200pps, would take only 0.05 to 0.1 seconds. It's extremely hard for humans looking at a flashing LED to perceive this. Sending out more pulses beyond that is likely to be useless without resetting the time reference by receiving more pulses. Remember, the inter-pulse spacing is a few milliseconds and the returned pulses must be accurate to within nanoseconds.

Mostly wrong. But as they say at kid's sporting events, "Good try."

[Won Hunglo]

Ahh, thanks for clearing that up. I'd thought it continued on in the lid time frame except for unlimited.

Early LIs did that until the old H-Town Trapsters found it during testing. It was a fatal flaw that allowed us to get instant PT at will until it was fixed. You sure you want that in your ALP?

[Mirage]

Mostly wrong. But as they say at kid's sporting events, "Good try."

Be nice at least he tried.


Transmitting and receiving at the same time is not the issue. The issue is always timing. PERIOD! If you want to learn the basics we can start a thread in an advanced section, but I don't want to talk about any of this in public.

[FJR1300]

Early LIs did that until the old H-Town Trapsters found it during testing. It was a fatal flaw that allowed us to get instant PT at will until it was fixed. You sure you want that in your ALP?

Haha, nope. I'm perfectly happy with how ALP works, was just a misunderstanding on my part about pro mode. Definitely makes sense now as to why that would not work.

[Tman]

I have only one complaint ...

Since my HiFi was installed dec 31 2014 ...i got not one single alert , where with the
beeper control set , it was 2 to 3 a week