EDIT: +6 dB is 4x the power! Sign up for Keysight University Live: bit.ly/KULive2​

@ArmiaKhairy

3 жыл бұрын

very narrow parabolic tube, because most LEDs I've seen are already have narrow beam width, or simply put it in the car instead of my pocket

@ryanlandry8214

3 жыл бұрын

I would make a parabolic reflector like you, but have a secret compartment for an amplified repeater (booster) circuit and small battery. 😂 Don't tell the FCC! 🤐😇

@isprithul

3 жыл бұрын

Is there any way to calculate how many times more range +6dB means?

@ryanlandry8214

3 жыл бұрын

@@isprithul Yeah, it's called The Inverse Square Law. It should give you 2x the distance with 4x the power (sqrt(4)=2), but in the real world there's all kinds of variables involved that will affect the distance. Edit: You can also search for a "decibel conversion table" to understand more about the dB to power (dbm) ratio. 😉👍

hummmm tin foil hat. i guess Daniel learned that from Electroboom. Also video on db and dbm would be nice

@OPOD1999

3 жыл бұрын

dB = relative measurement between two values (i.e voltage/power in vs voltage/power out) = 10log(P2/P1) = 20log(V2/V1) dBm = power expressed in logarithmic units = 10log(P/1mW)

The cup isn't Keysight, so that it didn't work. Let's do the experiment again :D

"If my face works, what else could work?" Try keeping it in your pocket

I suggest not just doing it on dB vs dBm, but also on power db versus signal db (10log and 20log respectively). Since this doesn't just apply to RF power, but to all kinds of electronics and other domains.

@BrianG61UK

11 ай бұрын

Isn't dB always power by convention?

6:45 6dB is not double, but 4x the power. Surprisingly high extra gain

@KeysightLabs

3 жыл бұрын

Good catch! I'm still not very good at that conversion in my head

I love keysight channel, It really gives learning content and fun content! Keep it up boys, Love ya!

Love it! Keysight Mythbusters! Seriously though Dan, I have used that first technique you tried in the chamber and against the face. Both helped slightly as your testing has confirmed. Yeah....an RF analyzer would be very handy tool to have if that's where you do most of your work. A must really. Good luck to everyone!

This is hilarious and educational. I love it

I would love a ton more introductory RF videos. I am liking what this channel has been up to last few weeks

@KeysightLabs

3 жыл бұрын

I definitely want to do more RF stuff!

What I want to know... Do you actually have that amazing view of mountains outside of your office? Wow!

@KeysightLabs

3 жыл бұрын

Yep! Beautiful Colorado Springs

i love that keysight is now hopefully posting regularly. You are a great, knowledgeable, funny and talented host. Keep it up! and also, gimme da metaaaaa! 🙈

a fresh video on dB vs dBm would be so great! it's a great possibility for newcomers and a welcome refresher for the pro's @Keysight Labs

Y'all are great haha Would like the dBm , dBd , dBi topics covered as well =]

I have held my key fob to my bare, un-tinfoiled head, and seemed to get a significant boost in range. 🤖🤖🤖

Hey Daniel, it would be really nice to have a video of dB vs dBm.

Would love a video on dB and dBm. My teacher could never explain it nicely.

After watching this video I was thinking that maybe comparing the imperial metal aluminum tin foil and the metric metal aluminium tin foil would give different results.

This is like a mini episode of Mythbusters!

pls more videos about, antennas, signals, messurement and understandung about this

just in case anyone cares.. a chamber with absorbers just on the walls and ceiling is a semi-anechoic chamber (typical for testing ground vehicles). An anechoic chamber has absorbers on the floor too, which is used for aircraft. I've worked in both industries, and spent too many hours in both types! The test gear is crazy expensive, but not as expensive as the chamber! The last chamber I worked in cost well over a million dollars (a 3 meter SAC).

What page are the winners announced on? I signed up for the event but the link in the calendar entries just takes me to the kickoff video on KZread. I had to dig to find this video

Would love a video on dBm dBi and dB in general

Thats amazing ma dawg!

5:37 We want a video on "that topic"🙋‍♂️

I'd like a video on dB vs dBm, sounds like a good idea

Although I laugh with myself every time I do it, that fob to the head gives me almost always that extra couple meters my gluteus maximus needs to stay that way ;-)

Those are some gosh darn beautiful mountains behind your campus. Where is that at (Colorado?)

@KeysightLabs

3 жыл бұрын

Yep! Colorado Springs

yes do a video on dB & dBm!!!

I would love to see more abouth that Anechoic chamber

What made the video was the 8-bit Yakety Sax. I remember going into a anechoic chamber at a Broadcom facility once, very cool! And yes I want a video on db vs dbm

That Feeld Fox would go great in my equipment arsenal! 😁🤩🤘

That Keysight jacket is SMOKIN COOL

A couple years ago a friend of mine doubted that the human head did have an amplification effect, ala being a resonant chamber or waveguide, even with my demonstration suggesting otherwise. One night, they forgot where they parked and tried it for themselves and begrudgingly texted me with confirmation.

Are you planning to release a more affordable beginner network analyzer? Limited frequencies, bandwith. Same as you did with those new black instruments.

Please make a video about dBm

Is totally true. I never heard about that. But discover it by my self. And been using that trick

5:40 yes please video on dbm vs db!

How about working on the circuit to make it higher power? How about putting a small reflector behind the antenna on the key itself?

@KeysightLabs

3 жыл бұрын

Good ideas! It would be interesting to make a directional key

thank you

Hrmm, a few years ago I built a solar powered auto gate. We have Rf key fobs in our cars. Mine refuses to work during cold weather. The battery voltage is over 3v per cell (two cells in series) they are 3v cells. Anyway I'd love to see if the RF remote frequency is drifting when cold. Some of the other key fobs are ok so it's not the receiver. 🤔

If you knew the frequency*, you could make a little Yagi with a space for the key-fob where the driven element would be. That ought to fairly easily get you more gain than anything shown so far. *It's about 434MHz in my country, but it's probably different in the US.

fascinating to see this idea put to test, though I wish it was further explained why putting the key fob by your head extends its range. I get it that it's not really in the field of electronics though...

I know this works in the field, but years ago I also tested this in the EMC Chamber at work and saw a little gain. I think every EE should spend some time working in a Compliance Lab, because you can learn so much about proper circuit design and grounding to prevent unwanted radiation from the unit, also immunity from external RF sources. You're able to use some really expensive test equipment as well. 😁

What's the radiation pattern of the keyfob?

One time some one told me that if you press more than 256time the carkey, with handshaking with the car, it will disable the carkey automatically! Did you test it?

Thanks guys that was funny i asking myself could it work like wlan booster like a yagi antenna i dont own a car so i dont know the frequency range i think yagi is something from 10 mhz up to 2000mhz

Why did you release a video about this. I wanted to make this exact topic my PhD thesis

Product idea: Car key range increasing umbrella. Also screens the user from the dreaded 5G.

This would have been useful if I hadn't moved a few months ago. Never could get the gate opener to work decently at the old place, even with new batteries. Had to nose up to the gate real close and then back up before it hit me. Now the Keysight nerds tell me to put a parabolic reflector in the passenger seat.

What is the effect when properly grouding the reflectors and the tinfoil-hat? Because when I did calculations at uni, we found that at least a static electric field basicly passes right through a piece of metal. Our teacher also showed a demo where if the shielding around a cable was not grouded, it was basicly useless.

@KeysightLabs

3 жыл бұрын

Interesting! Worth checking out for sure

Yes, make a video on dB vs. dBm so I can show it to my students. I’m sure you’ll explain it more interestingly than I can.

@KeysightLabs

2 жыл бұрын

Working on it now!

They call it a field fox because it sniffs out where the fault is and jumps right on it. It's also rugged so it survives the landing.

It's weird...with my garage remote, this actually works, and improves the signal a lot. But with my car key(BMW), doesn't do a thing...

So you can find the dB or dbm of something that transmitte something. Is that the basic principle of it

@KeysightLabs

3 жыл бұрын

It's like sound volume is talked about in dB, it's basically a log scale measurement that's useful for dealing with RF

so the marketing team could know make coffee mug that actually improved the range of key fob and hold your favorite beverage. That would be funny.

Amazing ⚡

Charge your fieldfox, jeeeeezuss 😂

@KeysightLabs

3 жыл бұрын

Haha no kidding. We had to run a really long extension cord a while into filming. I told Sarah she needs another battery!

Can someone send me the link to the winner's list of the following event

@VincentFischer

3 жыл бұрын

you're not on it.

If you try to calculate dbm gain from just the distance measurement at the end along with the inverse square law you get 4.01dbm gain for your parabolic reflector, not far off from the expected 6.35dbm! Maybe the environment impacts the range somehow. Or maybe the premise of calculating gain from distances is wrong lol. Awesome video as always!

@BrianG61UK

11 ай бұрын

Gain is in dB. The actual power is in dBm or dBμ.

Shouldn't 6dB (kzread.info/dash/bejne/c56N28yKe7qToLg.html) be four times as much power?

@KeysightLabs

3 жыл бұрын

Yup! Still not great at dB math in my head

The Benny Hill music is appropriate!

Yes, I want a video about dBm

Can we appreciate that Daniel's glasses look like they're made of licorice?

Your anechoic chamber has cooler lighting than ours

@KeysightLabs

3 жыл бұрын

Haha we definitely don't have that there normally, but we had to make it pretty

Where do we get the cat shirt?

Where's the link to the Sarah Gross video on the FieldFox?

@cheeto4493

3 жыл бұрын

Somehow I stumbled on the link to the live show yesterday, but I don't know where that was.

@KeysightLabs

3 жыл бұрын

you can find it on the 16-Mar page: bit.ly/KULive2

We are antennas and actually I think somehow it can work but not in the way it's useful for un.

This one was even more interesting video than the last one, I was rooting for the trigonometry guy

"who would buy a pill that makes you blind?" "We'll let marketing worry about that" -- The Simpsons.

1:33 does anyone know the name of that song?

@marcdavis7583

3 жыл бұрын

Yakety Sax. It was used in Benny Hill chase sequences. kzread.info/dash/bejne/jKJ8z9Wkp9Spc7Q.html

@peerappel2012

3 жыл бұрын

@@marcdavis7583 Thank you for your reply. This song plays once in a lot of chances when I run a big and succesful build in my compiler software after 5PM. I've been scratching my head for a long time about why this sometimes happened but I found it (fortunately) is an easter egg... :-)

Conversely, what will reduce it's range? Fully wrapped in your hand with a bunch of other keys? Maybe. But what will kill it is if some other electronic device is broadcasting continuously on the same transmitter frequency. This actually happened in our parking lot when my next door neighbor got a security system that was jamming the 443.92 MHz that car alarms were using.

@LiyangHU

3 жыл бұрын

A Faraday cage?

Loving the benny hill theme song!

5:48 it's not about a mouth it's about a brain and more specific - water in your brain. Put a key near the top of your head and you should see a difference.

So, the face with tinfoil hat means, your reflected signal is thru your head !

Should have charged that battery :-P

Do a video on dbm

Your skin is conductive, it acts as a capacitor and extended antenna. I found this out when I was messing around with an FM transmitter a few years ago xD.

Daniel, are you wearing your headphones backwards?

@KeysightLabs

3 жыл бұрын

Probably. Mono FTW

If reflectors boost signals. Then I would use huge lens and a led to light my area.

@snnwstt

3 жыл бұрын

The total energy has to be the same. Redirecting the initial sphere into one conical volume could give you 9 times the density ( upward, downward, left and righrward, backward redirected frontward), or as if the LED was three times closer than it is (since it decays as 1 / r-square), which is NOT MUCH more, isn't it?

@kishoreksm8366

3 жыл бұрын

@@snnwstt just for fun bro..

I knew I wasn't crazy! 🤪

@vgamesx1

3 жыл бұрын

Well you could still be crazy, just for different reasons.

Wavelength guys and girls, wavelength! At 300MHz (ie ~1m) cups etc are too small to act as a good parabolic reflector. For the tinfoil hat you forgot the special curried egg paste 😁

Isn't the easiest way to increase the signal strength of the key to decrease the distance? Nevermind, as I was typing this I got to 3:24

@KeysightLabs

3 жыл бұрын

Great minds think alike :)

I've never understood perfectly the Decibel and I don't know what DBm is... a video about it would be very good :)

@sergiomissaglia6380

3 жыл бұрын

@UCqrx9X729xC86Jj3QMo1ghA yes but whatching a funny video it's not the same thing as browsing da wiki

@TedSchoenling

3 жыл бұрын

Decibel is a measure of sound pressure, it is logarithmic. DBm.. that I'm curious about as well.

@sergiomissaglia6380

3 жыл бұрын

What the heck is going on with youtube ?

@sergiomissaglia6380

3 жыл бұрын

@@TedSchoenling thanks but it's oversimplified :(

@alexanderdaum8053

3 жыл бұрын

Basically you use Decibels to measure the difference between two signals. 10dB difference means a 10x increase in power. For Voltage or current 20dB is a 10x increase. So if you have a signal, that is 20dB bigger than another signal, it has 100 times the Power (2 * 10dB = 10 * 10 increase). So dB can only compare signals You get a dBm value, when comparing your signal strength to 1mW, so 0dBm = 1mW, 10dBm = 10mW, 20dBm = 100mW and so on.

Ah yes! Increase it all you can so my code capturing receiver can pick it up! Bye bye your car!

@KeysightLabs

2 жыл бұрын

Rolling codes ftw

Lol he had a key in sight.

Hm. If this is what keysight staff does, seems like fun place to work. But for measurement I'll stick with R&S 😀

@KeysightLabs

3 жыл бұрын

oooof

The best and always "handy" way to increase the range of your key is to place the key close to your head, in the temple area and press the button! You don't believe it? Try it! It works!

I want a field fox with big ears

Sixty Symbols showed that a jug of water also works :)

Top Gear proved this years ago... & I tried it & it works... 😏

Water bottle gives more improvement in range...

Friend: Bruh, those guys have tin foil hats and gizmos. WTH??! Me: Ah, the keysight nerds are outside Inner voice: Can't wait to get to good wifi to see what awesome video they have uploaded

Benny Hill music, i should win a prize for knowing that

I think your reflector didn't work because the foil's surface was not smooth

Nerds behaving... well... nerdy.. love it.

Ok....my employment application is now on its way. Hire me!

I'd compliment you on a video well done but it'd start looking a pickup line ;D

Wait, Ally got second place? Was it the spinning and jumping? I need answers!

@KeysightLabs

3 жыл бұрын

Haha, it is funny. I think the baseline measurements were a big factor in the results. A baseline in a low-power orientation vs. peak power would make a pretty big difference. Hard to rule out the spinning, though.

I'm quite surprised how you put the keys to your face. I think you will get better results if you just put the keys in front of open mouth. In the described case, a kind of resonance box will be created. I tested above scenario a few years ago with my old car and this idea improved the range. I am also struggling to understand why you tested different keys in the field? Sometimes it was 315 MHz and sometimes 434 MHz.