Please Help!!!!

[MichaelGrae]

ok so I had my goodies installed today quad hp laser interceptors and a escort qi45. Great install done by Ron on cliff from li's recommendation. I am having problems with the qi45! The reason I went q145 was because the windshield in my 2011 bmw 750li was cutting my hardwired vi performance in half. Now I have a new set of problems with the qi45. It is picking up k-band interference from the car usually 1 or 2 bars on the meter. I do have active cruise control, pre collision sensor, lane departure warning, and blind spot warning. I am assuming the culprit could be any one of those. The real problem is even when I turn all those gizmos off it still persists I am guessing something stays in a standby mode. The v1 never had this problem I guess because of its location and its reduction due to the windshield. What I was thinking of doing was going to my Bmw center where I have strong relationships with the techs and trying to isolate which function it is and kill it either permanently or with some kind of kill switch. But here is a big concern I have when I was driving over a bridge where I know a leo sits with his k gun blaring the v1 ramped up to full alert the q145 stayed at the 1 or 2 bars it was on from the car gizmo and never ramped up past their. Does it only detect one k source at at time? In other words because its picking up k from the car it wont alert from the leo? Or is the detector really that poor and I should be worried that a v1 through a metallic windshield works better then the q145. I did notice that once I shut k band off on the qi45(cant be a permanent solution lots of k around me) the qi45 was picking up a lot more x band chatter then the v1. So please help guys you have been great so far and I am almost done. What should I do and what do you think?

[Kwaz]

But here is a big concern I have when I was driving over a bridge where I know a leo sits with his k gun blaring the v1 ramped up to full alert the q145 stayed at the 1 or 2 bars it was on from the car gizmo and never ramped up past their.

I would either test the unit in anoter vehicle or send it back. Sounds like a Friday unit to me.

[Kwaz]

Another reason to doubt the detector is the fact that currently deployed automotive systems use 76- to 77-GHz radar implementations for adaptive-cruise control. As I understand it, there are no detectors that monitor this band. If that was true, I would be expecting your V1 to be going off as well...and...the issue would be a hot thread here in the forum.

[MichaelGrae]

This is so frustrating what the hell should I do. I am thinking of taking a third detector borrowed from a friend hooking it up to a power inverter and walking it around the front of the car. In the end I need a solution I can't go without radar detection

[that guy]

pics of the install?

[MichaelGrae]

pics of the install?

Pics coming

[Solidjake]

This is what happens when you buy a newer german car :P

Stick to the classics like an e46

[Kwaz]

This is so frustrating what the hell should I do. I am thinking of taking a third detector borrowed from a friend hooking it up to a power inverter and walking it around the front of the car. In the end I need a solution I can't go without radar detection

I was unaware of this until a moment ago:
"For automotive UWB short range radar systems the FCC allocated the band 22 – 29 GHz with a maximum mean power density of -41.3 dBm/MHz."
http://duepublico.uni-duisburg-essen.../Paper/5_3.pdf
Not powerful, unless the beam area is really narrow; however, it would mess with a detector; K-band radar guns operate at ~24.150; 0.100 GHz if I recall correctly.

I still think that the unit sounds like a flake though. The V1 is a red flag for me.

[insidercw3]

This is so frustrating what the hell should I do. I am thinking of taking a third detector borrowed from a friend hooking it up to a power inverter and walking it around the front of the car. In the end I need a solution I can't go without radar detection

I was unaware of this until a moment ago:
"For automotive UWB short range radar systems the FCC allocated the band 22 – 29 GHz with a maximum mean power density of -41.3 dBm/MHz."
http://duepublico.uni-duisburg-essen.../Paper/5_3.pdf
Not powerful, unless the beam area is really narrow; however, it would mess with a detector; K-band radar guns operate at ~24.150; 0.100 GHz if I recall correctly.

I still think that the unit sounds like a flake though. The V1 is a red flag for me.

-41.3dBm is a HUGE signal, especially considering that the radar detector's sensitivity is on the order of -112dBm or better, meaning that any signal bigger than -112dBm the detector will pick up. So -41dBm is huge. There is no help for the OP except for him to turn OFF K band detection in the QI45.

[Kwaz]

Agreed. Sensitivity to -112 makes -41.3 huge.

Update:

Found this intersting when thinking about lane assist radar:

For systems operating in the 23.12–29.0 GHz band, the frequencies at which the highest average emission level and at which the highest peak level emission appear shall be greater than 24.075 GHz. (4) These devices shall operate only when the vehicle is operating, e.g., the engine is running. Operation shall occur only upon specific activation, such as upon starting the vehicle, changing gears, or engaging a turn signal. The operation of these devices shall be related to the proper functioning of the transportation vehicle, e.g., collision avoidance.

http://www.gpo.gov/fdsys/pkg/CFR-200...ol1-part15.pdf section section 15.252

Tells me that the lane assit, if designed within the law, should not be constantly transmiting and should be vindicated as a cause. The ACC is on the higher frequency, and I believe the back-up sensors are on a lower frequency. 16-17 GHz.