Custom Notch Filters?

Brainstorm69

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Good information. The below from my experience.
BSM Falses 01.jpg
 
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Flonase

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I could swear I've seen some GM SUVs in that 24.200 region as well.
 

winterbrew

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You guy's are lucky - we get the GM's in that range and also at 100 MHz lower, as each door mirror uses a separate frequency for BSM (i.e 24.078 and 24.178 GHz) on the Holden Commodore (Chevy SS) :)
 

mikedotd

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You guy's are lucky - we get the GM's in that range and also at 100 MHz lower, as each door mirror uses a separate frequency for BSM (i.e 24.078 and 24.178 GHz) on the Holden Commodore (Chevy SS) :)
Yeah, we see that here too on the GM's (I mainly see those 2 on Cadillac's). Honda/Acura seem to be more common on the roads though. This year we also got introduced to new Mazda BSM systems in the 24.129-136-ish range that bounce around. They're strong enough to set-off my V1's rear antenna when passing one on the road in the opposite direction. Fortunately they're less common, but seem to be increasing.
 

Flonase

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If anybody wants to screenshot their alert history and PM it to me, I’d be happy to add their K-band alerts into the histograms. I’d really like any notch filters to be just wide enough to fully block BSM alerts. Actual real-world data from our specific hardware would help us get the tightest ranges that would still fully eliminate alerts to common BSM systems that the NR DSP has trouble filtering.

The last thing I want is to squander these filters on ranges that aren’t quite wide enough, or that are unnecessarily wide.
 
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BlueV1

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I saw a legitimate 24.20x signal from an LEO today in Easley, SC.
It was one of those marked Ford Taurus-type cars.

I'm currently glad that I don't have any way to segment that range out!
 

benzr

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WTF are you doing in Easley ???
Im surprised that po dunk town even has a Police Force. L0L.

Did a custom brick job there many Moons ago.


Posted from my iPhone using the RDF Mobile App!
 

BlueV1

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Ha! I was picking up some equipment from Chick-Fil-A that needed to be shipped to Ohio.
I saw two or three LEOs out there yesterday. That was probably all of them!
 

BestRadarDetectors

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We only have 6 segments currently to work with and its really only a temporary solution since we have bigger plans next year to combat these issues further but as a temporary solution would changing the existing 6 segments help many of you?

Existing 6 segments:

K1 23.950-24.000
K2 24.000-24.050
K3 24.050-24.100
K4 24.100 - 24.150
K5 24.150 – 24.200
K6 24.200 – 24.250

Existing NR & DSP just like Uniden do not scan below 24.050 so the current 1 & 2 Segments are not even used so we plan to change the segments to the following:

K1 24.000 - 24.100
K2 24.100 - 24.165
K3 24.165 – 24.180
K4 24.180 – 24.195
K5 24.195 – 24.205
K6 24.205 – 24.250

What are your thoughts?
 

Flonase

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That'd be almost perfect for me - I'd only make the following adjustments:

K3 24.165 - 24.175
K4 24.175 - 24.195

That'd get K3 a little tighter on the falses I've recorded in that little slice. HOWEVER I don't have a whole lot of data behind that one.
 
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G37X Jockey

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We only have 6 segments currently to work with and its really only a temporary solution since we have bigger plans next year to combat these issues further but as a temporary solution would changing the existing 6 segments help many of you?

Existing 6 segments:

K1 23.950-24.000
K2 24.000-24.050
K3 24.050-24.100
K4 24.100 - 24.150
K5 24.150 – 24.200
K6 24.200 – 24.250

Existing NR & DSP just like Uniden do not scan below 24.050 so the current 1 & 2 Segments are not even used so we plan to change the segments to the following:

K1 24.000 - 24.100
K2 24.100 - 24.165
K3 24.165 – 24.180
K4 24.180 – 24.195
K5 24.195 – 24.205
K6 24.205 – 24.250

What are your thoughts?
Revised K5 segment would solve 90% of my BSM issues.

Posted from my SM-A520W using the RDF Mobile App!
 

TurboDriver

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Maybe Seg 1 could end and Seg 2 start around 24.090 or 24.095, I have seen some very low 24.10x's lately and have never seen any BSM in the 24.09x range.

If you can't do single digit like a .197 and have to do "by 5's" like .195 then so be it... what you propose would help a lot!

Posted from my moto x4 using the RDF Mobile App!
 

Flonase

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If you can't do single digit like a .197 and have to do "by 5's" like .195 then so be it... what you propose would help a lot!
I have had BSM falses as low as 24.196 and as high as 24.204, so BRD’s proposal for K5 actually seems perfect, based on the falses I’ve had. Would love to get more actual data behind theses ranges, though!
 
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moneychanger

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Good information. The below from my experience.
View attachment 93255
I totally agree. Yes, they all (BSM) drive me crazy but where I live, I think everyone is buying Hondas and Acuras. LEOs are still using K-band here, but 19 out of 20 K-bans alerts I come across are BSM and the vast majority, Hondas and Acuras. I now find myself not paying any initial attention to K-band. That can ruin your day especially if LEO is using I/O.

--- DOUBLEPOST MERGED ---

Good information. The below from my experience.
View attachment 93255
That's a lot of work on your part. Thanks for sharing.
 

Flonase

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(Unnecessarily snarky response deleted - sorry).
 
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Brainstorm69

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You guy's are lucky - we get the GM's in that range and also at 100 MHz lower, as each door mirror uses a separate frequency for BSM (i.e 24.078 and 24.178 GHz) on the Holden Commodore (Chevy SS) :)
Actually, I have been noticing some GMs lately that also cause falses around the 24.06x-24.07x range. Good info to know.

--- DOUBLEPOST MERGED ---

That's a lot of work on your part. Thanks for sharing.
The work was done by @Flonase. Thank him. I just added what I have seen as the culprits to his data.
 

Blizzard

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Actually, I have been noticing some GMs lately that also cause falses around the 24.06x-24.07x range. Good info to know.
I noticed the same from GM’s last week traveling for thanksgiving.
 

G37X Jockey

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Our plan was to have the Net Radar DSP automatically learn to ignore certain frequencies of LCC equipped that the Net Radar DSP has installed on but its not feasible to do this at this time on the existing ALP hardware and still existing auto learn patents.
What I was thinking is that we can add some selectable notch filters to make life much better for some customers that are willing to risk locking out a very small section instead of a large segment.

If we could add lets say 5 small notches what would you all prefer?
Regarding notch filters, one possible way to minimize missing a LEO while reducing BSM noise would be to include an optional setting for the notched frequency range of alerting only visually, or only visually at minimum volume. This way users wouldn't have to choose between all or nothing for the blocked frequencies.
BRD does this sound feasible?

Posted from my SM-A520W using the RDF Mobile App!
 

Flonase

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I personally dislike the idea of a “half alert”. I’d rather have a filter be a true filter. If we get a partial alert even with the filter on, just make it a full-on alert. To me a notch filter that still gives a partial alert defeats the whole purpose.

My $0.02.
 

BestRadarDetectors

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I personally dislike the idea of a “half alert”. I’d rather have a filter be a true filter. If we get a partial alert even with the filter on, just make it a full-on alert. To me a notch filter that still gives a partial alert defeats the whole purpose.

My $0.02.
Blocking part of a frequency using band segments will not give an alert if that segment is turned off.

Sent from my SM-N960U using Tapatalk
 

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