TMF2 Off and On video

Bloovy One

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Hey all,

I had created this screen capture video of JBV1 last week showing how my V1 works in a specific scenario with my car in my driveway. It's 1:16 long, no audio.
I sent it to @RoverTtx and I thought a few of you might enjoy it as well. :)

Here's the scenario:
2018 Honda Accord parked in my driveway. Metal garage door in front of me. Metal drainage grate behind me. I get my own brief BSM signals sometimes when I park. No other active cars around for 1/2 a mile or more.
Notice the erratic blue line for the alerts. That's the frequency changing constantly and it's one of the reasons why BSM is so difficult to filter out. A regular signal shows a straight blue line instead.
 

RoverTtx

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Super cool and great example! Tmf really makes a big difference. Interesting to see the frequency move around and even show up as multiple bogeys.
What did you use to record that video? I'm curious.

Sent from my Moto Z (2) using Tapatalk
 

InsipidMonkey

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Notice the erratic blue line for the alerts. That's the frequency changing constantly and it's one of the reasons why BSM is so difficult to filter out. A regular signal shows a straight blue line instead.
I'd argue that's exactly why they should be filtered out :) If you can visually see a difference in the signal, surely a computer should be able to distinguish them as well? With the amount of processing power in the R7, I'm surprised the filtering is so bad. I bet if Uniden open-sourced the code a few of the talented programmers on here could write a superior BSM filter in a week!

Hopefully Mike V has been hard at work on the BSM filter in the new V1, and the next version will be as much of a quantum leap as when TMF2 was released :D
 

Bloovy One

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If you can visually see a difference in the signal, surely a computer should be able to distinguish them as well? With the amount of processing power in the R7, I'm surprised the filtering is so bad.
Totally in agreement! @johnboy00 has already done more to address BSMs than some manufacturers have.
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What did you use to record that video? I'm curious.

Seems to work well enough. :)
 
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surprisinguy

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Explain the other colored lines as well...
I tried using that graph but my eyes seeing that and driving dont mix :)
 

Bloovy One

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Sure! The red line is the signal strength of the front radar antenna, the yellow is the back antenna.

The blue is different in that it's not strength but frequency changes of the detected signal.
 

KnightHawk

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Honda's activate their BSM when the vehicle is moving 20 mph or more but not when they are stationary.
 

Bloovy One

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Not entirely true since I can replicate this all day long, but worth learning more about. :)
 

GTO_04

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Honda's activate their BSM when the vehicle is moving 20 mph or more but not when they are stationary.
It may not report BSM alerts at low speed, but most likely it is still transmitting. I know this from sitting behind two Acuras at a stoplight. The heartbeat was fluttering so erratically it looked like my R1
was in cardiac arrest.

GTO_04
 

Bloovy One

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^ Ah, yeah, that makes sense too. I'll have to try to test by following my Wife's CR-V at 15 up to 25 MPH on a desolate road to see if anything changes. I don't want to dismiss an idea outright. :)

It could also change behavior based on whether the Honda has cross-traffic alerting. I don't know what happens without that feature for sure, but it's active at rest while in reverse on mine.
 
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KnightHawk

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Not entirely true since I can replicate this all day long, but worth learning more about. :)
That is true with the V1 but not with Unidens. I can prove to you pictures.
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It may not report BSM alerts at low speed, but most likely it is still transmitting. I know this from sitting behind two Acuras at a stoplight. The heartbeat was fluttering so erratically it looked like my R1
was in cardiac arrest.

GTO_04
Interesting. My R3 never gave me a blip sitting behind Honda's/Acura's. This has been my observation in the last 7-8 months. I'll post a picture later. Don't know if it is just my R3. When I did this test, I had K band at 100%.
 
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Bloovy One

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If I can turn off TMF2 on my V1 and get typical BSM signals from my car while parked (as indicated by the speedometer in the app), how can it be that Honda's don't activate BSM below 20 MPH? That's what I'm saying that I can replicate. There's more to this.
The Unidens have nothing to do with that. Also, the R3 doesn't have a rear facing antenna.

Am I understanding correctly? If not, please elaborate. :)
 

KnightHawk

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If I can turn off TMF2 on my V1 and get typical BSM signals from my car while parked (as indicated by the speedometer in the app), how can it be that Honda's don't activate BSM below 20 MPH? That's what I'm saying that I can replicate. There's more to this.
The Unidens have nothing to do with that. Also, the R3 doesn't have a rear facing antenna.

Am I understanding correctly? If not, please elaborate. :)
You can replicate it with the V1 because regardless of what the speed is, it alerts to it. Think about it. The Honda is sitting in front of you in a traffic light. The R3 does not need a rear antenna. That is why I was puzzled about this. The V1 screams when it is behind a honda while stationary. The R3 is silent when it is behind a honda while stationary. When in moving mode, the R3 picks the honda father than the V1. Don't know what VR's technology is but the Uniden got it right when honda says their BSM is activated when speeds are 20 mph or over and deactivated below 20 mph.
 

Bloovy One

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No... That's not what I'm talking about here.

But, I fully recognize that there might be different power outputs of Honda BSM systems.
Note: The V1 alerts when the filter is disabled. It's silent with the TMF2 filter enabled just like you see with the R3.
 

KnightHawk

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No... That's not what I'm talking about here.

But, I fully recognize that there might be different power outputs of Honda BSM systems.
Note: The V1 alerts when the filter is disabled. It's silent with the TMF2 filter enabled just like you see with the R3.
My TMF2 was enabled.
 

KnightHawk

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Are you referring to the low speed muting that the R3 offers? I'm confused by your statements.
I am referring to the V1 alerting to honda's that are stationary with engine turned on. I am also saying the the R3 does not alert to honda's when they are stationary with engines turned on. Per Honda, the BSM only activates when the speed reaches 20 mph or over and is deactivated below 20 mph. Quiet ride or low speed muting that you are referring to does not really matter for the R3. The R3 alerts to any k band source whether the vehicle is stop or not. In the photo behind the Honda Odyssey, you can see the V1 alerting to the Odyssey. Please note that the traffic light just turned green but you can see the close proximity of my car and the Odyssey just released the brakes and even if it started to roll, that will be less than 20 mph. In the other picture with the pilot (Touring AWD - should have all the BSM feature) in front of me, my R3 did not make a blip. Please note that I am in dark mode with the R3.
 

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Bloovy One

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Let's back out of the R3 vs. V1 stuff here.

We don't know what all is happening and that's not what this thread was about. We can't entirely negate the possible effects of a rear antenna vs. front only antenna either.
If KnightHawk believes that Uniden has done something right in regards to this, good for him. Others might say that the Uniden is filtering out too much.
It doesn't change that this thread is about TMF2 On vs Off.

I have another video that I did the same day. This one is longer and I was forcing more reflections by parking closer to other parked cars.
No audio, 1:58. :)

Also, note that the rear 24.219 (7th down) has now been automatically locked out and you can see the lockout circle in the graph area. Those are fun to see when yo come across them as they show where you are in relation to them. (In this case, dead center but the circle appears from the top and exits out the bottom as you drive)
 
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