2 detectors at the same time? I want to test the R1...

cbbr

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I have F/R non-DSP NetRadar in my Miata and have a R1 that I picked up for my truck. If I run a R1on my Miata's windshield, will it cause a problem or will they interdefe with each other?
 

SquirrelMaster

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Typically the safe answer is yes but if it's a remote mount and a windshield mount, they may be far enough apart to not be too much of an issue. Ymmv. Make sure you have and know a baseline of how your netradar performs so you can see if it's affected.
 

Heywood

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It might be closer in your little car, so you might still get interference.

Generally you get false signals when your in traffic and close to a vehicle in front getting reflection.

Same with walls and fences.

It’ll get you an idea, but I wouldn’t count on any testing results. Also any spirited driving should be avoided if you need to count on your CM’s.

If your just tooling around, and curious, try it.


Sent from my iPhone using Tapatalk
 
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Kennyc56

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I have finally figured out something about this subject! I have been running my Redline-O and V1 off and on with my R1 with no problems at all and NO sign of any interference, even during testing and making several videos to prove it! The last test that @VariableWave and I ran, I tried running my new Whistler CR95 with the R1 just to see how bad the CR95 would screw with my R1. Guess what? The R1 made my Whistler scream bloody murder on K band every time I powered the R1 up with it! I moved the CR95 to the other side of the windshield and it stopped alerting to K band but went fast asleep! I have also tried this with my new CR97 and got the same results. Finally it hit me! I have had K band turned off forever on my Redline and V1! Since they are not sweeping for K band, the R1 doesn't affect either one of them at all! As soon as I tried my V1 with my R1 again with K band on, it also screamed on K band! The Redline does the same thing! That's why I have driven for thousands of miles with my Redline/R1 and R1/V1 combos with no problems! Sounds like a new test video coming up!
 
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cognetic

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My first experience with NRDSP along with MAX360c was this morning.

After playing around with on/off with both devices, I could discern no interference either way.

However, a side benefit I discovered is comparing SuppressTeach to what has already been learned by the MAX360c!
This will be a winner in the upcoming weeks of training the NRDSP.

It’s a quick visual with a glance to compare band & strength. Noticed also the better range of detection with the NRDSP.

The separation is only about a foot between the devices in a slanted over/under config.



-cognetic
 

hiddencam

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If one of the detectors emits, which they all do, there will surely be interference, even between remote unit and a windshield unit. This has been tested before and the science of it remains the same. If there are emissions from one, then the other will pick those up, and it'll impact reactivity and/or sensitivity. It's a completely unpredictable and intermittent thing. Very difficult to scientifically test. Sometimes you won't even notice it when it's there. Sometimes it will be obvious, or should be, and you'll probably wonder what just happened. Just don't speed when you're testing it out and you won't get into trouble.
 

cognetic

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@hiddencam
A well received caution...
Especially if a matter of desense or sense pulse interrupt phenom.

Are the emissions spurious depending on receive state (active/scan), mode, or other internal processing unique to electronics of each NRDSP or any other specific/modern RD? I noted a FCC type specific registration on each of mine, btw.

I’m curious if some wide band SDR or spectrum scope in near field strength config could capture those conditional moments.

My cabin is already awash in resonant, non-resonant TX/RX, I’m amazed by how well the devices play together so far LOL





-cognetic
 

hiddencam

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@cognetic I love the idea of using a wide band SDR to try and capture those emissions. Sounds like that kind of test is right up your alley. It would be great to measure and rank by detector, and would probably really help anyone inclined to study the interference topic. I found a few years ago that the Redline (and presumably all members of the M3 family - 9500ci, Bel Magnum & STIR) were designed to perform a calibration cycle immediately after boot up, then every few seconds, then with the interval getting greater over the next few minutes, until it averaged out about every 3 minutes. During that calibration cycle there are detectable emissions, not to a RDD, but my V1 would repeatedly throw a Ka false every time a calibration cycle occurred. Those M3 emissions to a V1 were later measured by member Rags up to something like 27 feet away. The noisier detectors are even worse; throwing falses even more often. I've run multiple combinations of detectors together over the years and they've all caused K or Ka band falses in a sporadic and inconsistent manner, depending on proximity to the other detector, proximity to reflecting objects, and other nearby signals, whether legit LEO radar or BSMs from other vehicles. I've also witnessed detectors going partially and completely 'deaf' to nearby strong signals, as well as missing fast brief transmissions from radar guns I've tested with. And if one general theme showed itself, it is that interference is consistently inconsistent ... but always eventually shows its ugly head. The new DSP Uniden R3 and R1, and NetRadar, are a different design, and my combo testing with them revealed significant interference, putting my Bel Magnum into a coma.

Our resident expert, @Nine_C1 commented to that coma video saying, "Well, there is really no mystery here. The mixer (in the R series detectors) is sitting near the base of the horn and there is NO LNA between it and the horn to cut off the emission path. Therefore, whatever is being pumped out of the LO is going through that mixer and straight out the horn. The only logical conclusion is that the LO frequencies being supplied to the mixer are not the typical frequencies that current RDDs are set up to look for. However, radar detectors are tuned to receive a much broader spectrum of frequencies and could very well be bothered by the R1 / R3 emissions. Good job H/C confirming this one does bleed. So.....the Uniden R1/R3 are stealthy detectors.......but not STEALTH."
 

thesilverbullet

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I have F/R non-DSP NetRadar in my Miata and have a R1 that I picked up for my truck. If I run a R1on my Miata's windshield, will it cause a problem or will they interdefe with each other?
interference is a concern but the question that has been asked many times is... drum roll... how far apart is needed to eliminate concern? how does the 360 units get around the issue? I've read where the v1 alternates horn scans which seems like you would give up on response time to QT hits.

i would think that a remote would have a good chance running with a windshield mount. i'm running a RL and R3 about 7-8' apart and they seem to play well together but no idea if they have problems or not...

is it an issue with cars running close together on the interstate? if you were tailing me on the highway, is your remote going to kill my rear facing RL?
 
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cognetic

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@hiddencam
Thank you for that detail! That really helps me to get a better technical perspective on the matter. I’m a somewhat over-educated country boy with occasional-misapplied knowledge from other arms of the same science at times.

For some reason, it prompted a memory... A “silent key” OM Professor-type kept me entertained back in grad school days with projects like reciprocal oscillatory drives through gunnplexer horns to make VW bugs going 50mph look like they were going 200mph+
His vehicles always had some great toys onboard... And his home estate & compound was designed to hide his labs & antennas plus highlight some unique research mixed with hobbies in very creative / artistic ways.



-cognetic
 

hiddencam

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LOL we folks around here have all been guilty of misapplied knowledge at one point or another. I figure as long as it's not guilty knowledge we're still doing ok.
 

VariableWave

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interference is a concern but the question that has been asked many times is... drum roll... how far apart is needed to eliminate concern? how does the 360 units get around the issue? I've read where the v1 alternates horn scans which seems like you would give up on response time to QT hits.

i would think that a remote would have a good chance running with a windshield mount. i'm running a RL and R3 about 7-8' apart and they seem to play well together but no idea if they have problems or not...

is it an issue with cars running close together on the interstate? if you were tailing me on the highway, is your remote going to kill my rear facing RL?

A good question of the rear Facing... if the driver in the rear vehicle has his detector pointed to the sky like the cobra epic fails moments looking for off axis or Death Star alerts, less than likely. Also, as @hiddencam mentioned, a smart detector should calibrate to dismiss the emissions and potentially reset every so often as the said "other detector" emitting its trash to yours would be gone after a period of time, or so hope. Traffic jams, would be that limiter or the guy using you as that rabbit.
 

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