so...I put a Time Server in my HomeLab

[@NetworkChuck]

Get NordVPN 2Y plan + 4 months extra plus up to 20 GB Saily data voucher ➼ nordvpn.com/networkchuck It’s risk-free with Nord’s 30-day money-back guarantee! In this video, I install a high-precision time server in my studio using the OpenTimeCard Mini from TimeBeat. Instead of relying on external Network Time Protocol (NTP) servers, I’m hosting my own time server to achieve nanosecond-level accuracy using Precision Time Protocol (PTP). The OpenTimeCard Mini combines a GPS module that receives signals from satellites equipped with atomic clocks and a Raspberry Pi Compute Module 4 (CM4) acting as the server. This setup allows me to synchronize all the clocks on my network with unprecedented precision. Additional Information: If you’re intrigued by the fascinating world of time synchronization and want to delve deeper, here are some interesting insights and resources: • The Precision of Quartz Clocks: Modern quartz crystal oscillators are remarkably accurate, typically drifting about 15 seconds per month. While factors like temperature and aging can affect them, advancements have significantly minimized these deviations. • The Birth of Atomic Clocks: The first practical atomic clock was developed in 1955 by Louis Essen at the National Physical Laboratory in the UK. By 1967, the second was redefined based on the vibrations of cesium atoms, marking a significant leap in timekeeping accuracy. • GPS Satellites and Timekeeping: The Global Positioning System (GPS) began with the launch of its first satellite in 1978. These satellites carry atomic clocks that provide precise time signals, revolutionizing navigation and global time synchronization. • Understanding NTP Synchronization: The Network Time Protocol (NTP) dynamically adjusts its synchronization intervals, typically ranging from 64 to 1,024 seconds, to maintain accurate time across devices connected to the internet. • Time Zones and Global Standardization: The concept of standardized time zones was proposed by Sir Sandford Fleming in 1879. The 1884 International Meridian Conference endorsed these time zones, paving the way for the global timekeeping system we use today. • Hardware Timestamping in Networking: Hardware timestamping captures the exact moment a network packet is sent or received, allowing for nanosecond-level precision. This is essential for applications requiring extremely accurate time synchronization, like PTP. • Raspberry Pi and Hardware Timestamping: While the Raspberry Pi Compute Module 4 (CM4) allows for hardware timestamping through additional network interfaces, the standard Raspberry Pi 4 does not support this feature on its built-in Ethernet port. The new Raspberry Pi 5 introduces hardware timestamping support directly on its Ethernet interface. • Why Nanosecond Accuracy Matters: Industries such as financial trading, where transactions happen in fractions of a second, rely heavily on precise time synchronization. Broadcasting and aerospace also require this level of accuracy to ensure seamless operations. Further Reading and Resources: • TimeBeat’s OpenTimeCard Mini: store.timebeat.app/products/open-timecard-mini • TimeBeat Software: www.timebeat.app/solutions/ • Understanding Precision Time Protocol (PTP): www.timebeat.app/blog/sync-showdown-ntp-vs-ptp-vs-tsn-vs-ethercat • History of Timekeeping: www.timebeat.app/blog/timekeeping-history-and-technology • Quartz Crystal Oscillators Explained: www.timebeat.app/blog/quartz-crystal-oscillators • Atomic Clocks and GPS Technology: www.timebeat.app/blog/atomic-clocks-gps-timing • Raspberry Pi Hardware Capabilities: www.timebeat.app/raspberry-pi-hardware-capabilities • Network Time Protocol (NTP) Details: www.timebeat.app/blog/sync-showdown-ntp-vs-ptp • Global Standard Time Zones: www.timebeat.app/blog/global-time-zones 🔥🔥Join the NetworkChuck Academy!: ntck.co/NCAcademy **Sponsored by NordVPN

[@khedersaber9224]

first clock invented by muslim

[@adenwellsmith6908]

I've seen people use water clocks for real. Burma, now Myanmar, they were using a water clock as part of the process for making gold leaf. You have to hammer the bundle for as long as the clock which was floating (with a hole) until it sank. Then someone else got to hammer.

[@inerlogic]

The episode where we find out that Chuck isn't a ham

[@emircanerkul]

Not good, instead of those network signal things.. isolating and perfectioning that vibrating atom wouldnt be better idea? so there will be no shifting

[@manjilunnobi]

Here time clock Real time clock My time clock This time clock How word are more here same meaning

[@elmin9650]

My second role beside IT role is Time center techinican,im so happy that someone talk about how much time measuring is mindblowing.

[@timballam3675]

and the fact that 1ft is about 1ns so you need cm accurate GPS for these time servers.

[@LogicalNiko]

Cool, I went down the rabbit hole on being fascinated with precision time when I was doing signal level protocol work in the late 1990s. By the mid-2000s I started collecting some random lab sources, precision time gear, etc that I could find on eBay while in my professional life I was managing large scale telecom systems.

[@dromerdev]

Just wait until he starts synchronizing his coffee breaks with atomic clocks

[@raspberrypimilitant2242]

Now I have a guide on how to synchronize my coffee poops

[@SilasTheSilent]

Don't you mean "coffee breaks"

[@elmin9650]

@@dromerdev procedure for buying atomic clock require government perrmision

[@cw8jwh]

Or he turns into Sheldon.

[@ytzfan]

it's only a matter of TIME.

[@Mtaalas]

Small correction, crystals don't inherently vibrate at that frequency, crystals are just "electromechanical" clocks, their cut and size and mass determines the frequency, which is very stable, and they can be tuned to extreme accuracy and with electronics, that accuracy and stability can be turned into very good clocks and other frequency references. :) 32768hz was chosen because you can divide it in many ways by 2^n, so binary counting systems can keep track of a second by measuring 2^n ticks of that clock. :)

[@McGregorMX]

History is cool.

[@LogicalNiko]

Yes you can get much more precise quartz oscillator chips. It’s just that 32mhz was fine for average consumer need. It also needs almost nothing in terms of power to keep this running (a compact watch battery can power them for up to a decade). Now once you go beyond about twice that temperature variation plays a major part. So you have Temperature Compensating Oscillator, and then above that you have Oven Temperature Control (the quartz crystal is maintained inside a small electric oven that keeps it at a stable temperature over ambient). Of course now you can get single chip cesium and rubidium oscillators too.

[@Mtaalas]

@@LogicalNiko yes, and temperature variations happen partly because temperature causes the size of the crystal to change, like anything else -> altering the tuning frequency. :)

[@LogicalNiko]

@ yep and when you get really precise gravity effects become a factor. Just change the angle and you could watch the frequency swing. In theory you could use this to track small variations in local gravity and altitude, but that’s much easier with other instruments.

[@jnorris8649]

Geezus... That's a frikken $1200 board + $70 for the CM4 adapter + $120 for the CM4 + $80 for the antenna. Cool info, but that's a hard pass from me.

[@tjokkerstar1462]

that seems cheep i just looked at the website and a "Open Timecard" was £2495. Time is expensive

[@McGregorMX]

Exactly what I thought. At $200 I'd buy one, but 1200 is a quick pass.

[@kyleunrearl2o4049]

@@McGregorMX He got paid to peddle this crap to you.

[@roblatour3511]

@@kyleunrearl2o4049 I did it way way cheaper - Hackaday - ESP32 NTP Time Server (Stratum 1)

[@ChickenPermissionOG]

@@kyleunrearl2o4049 not crap, normal people have no need for this accurate of time.

[@AdamMotlik]

The USAF spent a week explaining Rubidium and Cesium clocks to me but this was way more fun. Watching you realize that your antenna needed to be outside or in clear view of the sky was pretty funny. Good stuff Chuck.

[@KTFCUTL]

LOL. 3C2 Tech Control! I remember them FCC-100's and Promina's

[@pazsion]

he shouldnt need to since the signal penetrates, and triangulates between 3 or more satalites. and cell towers. ??

[@Theinatoriinator]

Just wait until the quantum chicanery clocks come out, even better than modern atomic clocks and they use nanokelvin atoms to do it.

[@Ruhrpottpatriot]

@@pazsion GPS signals are transmitted at only 50W (i.e. they are as "bright" as a commodity lightbulb) from more than 3000km away. A piece of sheet-metal reliably blocks the signal. And no, a GPS signal does not use cell towers in any way. Your device _might_ use them as _additional_ information, but not the GPS chip itself.

[@ClydeVisser]

GPS antennae are active in that they have an amplifier built-in. They're powered by a dc bias voltage from the GPS board. Also, the GPS frequencies (GHz region) have a very high attenuation per meter of cable. Antennae height is irrelevant, they must have a clear view of the sky, the greater the better. Trees are bad. Clouds are bad. I used an OEM GPS uBlox module some 20 years ago for timing purposes. Cool stuff.

[@shishsquared]

Slight correction on the quartz crystals. They resonate slightly differently based on the size of the crystal. We get them down to the size that is very useful to us. 32,768 is a very useful number for computing, as it is 2¹⁵. So we get the crystals measured precisely to a size that will resonate at a value useful to us

[@johnb5033]

I was looking for this comment. Thanks!

[@VividBagels]

this is blowing my mind rn

[@rickysargulesh1053]

That history lesson was amazing

[@adenwellsmith6908]

The history is interesting. It started with railways. That was a huge influence on Einstein, and you get a flavour as well from these sorts of set ups and syncing. How do you sync when the signals take time?

[@robertl6481]

I love the breakdown of the video and how much depth was put into the details. I'm no GPS expert, but I have been in situations where time was off and systems did not connect. I have also been in situations where an antenna was not positioned properly to get timing. The funny thing is that most people think GPS is easily gained from inside a building because our phones seemingly work inside with GPS. Additionally, Hollywood often gets it wrong, putting people having Iridium (satellite) calls inside ships, underground, etc and the individuals having successful conversations, but then other times showing an Iridium phone NOT having signal when they are clearly in plain view of the sky. However, outside is critical, because the signal comes from space. The building can even stop the signal from being received if too close. A long cable is normal for a setup where you have an external GPS antenna. Overall this video is great and would be very useful for people to get an understanding of how critical time is.

[@PetruWind]

Been on this channel for years and still enjoy the videos!

[@RonLeedy]

20 years ago I was running Stratum 1 servers in my data centers throughout the US for database cluster synchronization. Also, for data replication to my offshore data centers. They were very expensive. Its good to see tech has brought the size and cost down to the homelab.

[@networktimefoundation]

Very interesting stuff! Thanks for sharing! The NTP Project folks appreciate you bringing attention to our work!

[@skeetabomb]

The one thing that is more important than having accurate time is having synchronized time...that is, if you had to choose between having all your servers in perfect sync with each other or all but one on the correct time, choose in sync. This is because timestamps from various systems become important for log correlation. If all logs are out by a few seconds but all systems generating logs are in sync, you can correctly sequence your logs.

[@ejc4684]

I worked with a lot of stuff with precision time to the nanosecond level in the past. Everything you said is exactly right. We used it for air traffic control. Not just for timekeeping of all the flight positions data and comms but also to measure time against transponder replies to determine distance of aircraft from the receiver called MLAT or multilateration. It’s really interesting stuff. Awesome video!

[@nirmalcd9410]

This can't get better than this. I'm a broadcast final year student figuring out how to setup PTP with pi for AES67 streams and Viola!! here my fav youtube friend with the video

[@jdaksh]

can't wait for the day when he says i want to host the whole internet myself just a joke 😂😂

[@WiSPMusic.]

or is it??

[@NathanChambers]

I mean, there are people who make youtube videos of making their own ISP with old tech, so it's not fully out of the question this guy would do it. Although, I doubt this guy would though, since he only pushes garbage he was given for free.

[@jdaksh]

@@NathanChambers You are kind of right

[@pquodling]

One of my mentors was at MIT working on tweaking the Kerberos Authentication Protocol as part of Project Athena - one of the issues was that authentication packets were time stamps and "drift" was an issue. As such there was a large window allowed - he suggested NTP, which was happening at U. Delaware at the same time. Syncing all nodes meant they could wind down the window, reducing the risk of decrypting the authentication packets. On the point of understanding a NanoSecond - Admiral Grace Hopper would hand out 11" bits of wire - this is how far an electrical impulse (or light) can travel in a nanosecond. LAter she would hand out the little restaurant paper packets of pepper - these were the same for a "picosecond". Early supercomputers (like the Crays) would have a spiral of etch on someboards, and you would tweak their timing by soldering a wire to some point on the spiral.

[@LordDragon1965]

I remember the famous lecture by Admiral (then Captain) Grace Murray Hopper where she handed out nanoseconds. It was a wire 11.8 inches long. That's the distance electricity travels in that amount of time.

[@LordDragon1965]

By the way, the Navy put a version of it on KZbin.

[@ZeroUm_]

Not quite at the speed of light, it depends on the cable velocity factor.

[@FreedomToRoam86]

The Navy cable velocity factor is why it took them a decade to get it on KZbin! 😂

[@TsukiAkarii]

Assuming you guys are here looking for the video that was taken down. It was just him bashing LTT for taking down their video about CompTIA A+ exam and nitpicking every statement Linus made as if he was personally offended while trying to sell his course on training material for the same A+ exam.😂

[@SirDonald]

I like NetworkChuck, but yeah this pretty much sums it up 😂

[@TsukiAkarii]

@@SirDonald Same but this was out of pocket for no reason lol

[@honzav8614]

After 15 minutes and 3 commercials, he realizes he has to put the GPS antenna outside ????

[@asknight]

Occasionally people get lucky and have a roof that doesn't totally destroy the signal, but that isn't always the case.

[@IndaloMan]

He is a KZbin content creator, therefore has to string out his videos so they are long enough to contain multiple ads including the COMPULSORY NordVPN ad.....

[@xevil21]

Because he's an i_di*t.

[@oliverw.douglas285]

Chuck's background is rooted in IT. If he's not dealt with System Time & Synchronization Issues, or RF/Microwave Signal Propagation, I suspect the GPS Signal Issues may simply be outside his 'wheelhouse.' Working in the Telecom Industry for the past +25-years, BITS Clocks & Synchronization is a daily concern for both voice & data traffic, across the network. If we loose our primary timing source (Stratum 1), which is typically our local GPS Receiver (with an outdoor antenna), we'll fallback to our secondary timing source (Stratum 2), which is a fiber-fed Signal from a remotely located Stratum 1 Timing Source. Suffice to say, these days Timing & Synchronization is crucial, for network elements to work in concert with one another. Free-running equipment will eventually lead to chaos in the Telecom & Data World.

[@gg-gn3re]

block them all

[@OwenVentures]

Been using your classes for a couple weeks but just saw you have an app now! 🎉🎉🎉🎉🎉! So awesome! Thanks for being you and helping me get through all this stuff without getting bored and falling asleep! 😂

[@staceyward777]

I've had 2 NTP servers on my home network for years. One is a little dedicated unit whose sole purpose is NTP, and the other is a RPi 3B+ with a GPS HAT that I put together to feed ADS-B data to the 3 major flight tracking websites. If those both fail, my NAS is built on an RPi 4 and has a high-accuracy real-time clock attached that can take over.

[@ClydeVisser]

Also, it can take 10 minutes for the GPS to find the sats. The doppler shift means searching the frequency band can take a while.

[@bigmike102]

Time sync is also super important for live TV broadcast as well.

[@prongATO]

To the editor of the video: THANK YOU for taking out the coffee slurps!

[@MikeHarris1984]

You didnt know about PTP???? wow... a little BEHIND THE TIMES!!!! ...thank you, i'm here all evening.

[@FreedomToRoam86]

Dude - you are now my favorite KZbinr, by virtue of having a Coffee Shop at home. That makes 2 of us forward (or at least caffeinated) thinkers 😂

[@dennisfahey2379]

My favorite subject. Time synchronization is immensely important in connected parallel computing - especially clouds and systolic arrays. Intel's latest chips finally support high precision time as do most high end network products. Think about it for a second (pun intended) - you have a bunch of nodes running in their own little time domain world. When they interact with eachother they start to have a sense of fluidity they "wish" to achieve. You want the independent requests and responses to be low latency and instantaneous. And yet every transaction is non-deterministic. For every node you add each interaction between the nodes exacerbates this meshing. Without an agreed time unification the software will spend (more like waste) time polling and responding with very low efficiency. You are not computing when you are asking for something to compute and waiting for a node to "get around" to it. Take that chaos and think of a time partitioned comb (for your hair) with teeth. At tooth #1 we all sync. At Slot #2 all look for global commands like reset. Slot #3 - Node #1 sends requests. Slot #4 - all respond to Node #1. etc. This is simple to prove a point. If you are not involved with Node #1 - you can ignore the slot and keep busy. The array of nodes because become synchro-meshed and message with minimal disruption. It is seriously game changing.

[@IndigoVFX]

I’d love to learn more about this (systolic arrays and parallel computing) - have you got any good sources to start from? Thanks for the inspiring comment 🙂

[@b5nj1m9n]

Ah man you’re videos are killing me, good thing I have more time now. Love it!!

[@kamilstenzel3929]

Damn, that's cool, I need one of the... £1,187.85 I don't need one of these

[@overtonesnteatime198]

Came for a networking lesson, stayed for the history on time. what a journey. Great content once again.

[@bojandimic3914]

I used PTP when we were deploying 5G in our network. Base stations need nanosecond level precision for 5G to work. Nice video!

[@danielrubio2746]

I work with electrical protections for substations and power generation plants and time synchronization is veeeery important. Thank you for this video 👏🏼👏🏼👏🏼

[@TECHDIVE-q7o]

Its so much important that somone finally explained the importance of time server

[@carlorivas7653]

This is geeky to the nanosecond! Love it! Great video, keep doing amazing content

[@Entralla]

the 60 second history was so crazy good! do more of that frfr!

[@MendisOfficial]

That time history montage is crazy!

[@0x4133-o]

i been doing gps stuff and it can take up too 20 - 30 mins for a lock, now the cool thing is you have a warm start after getting that first signal. Next time you boot gps up it should be able to just get a lock.

[@chaos.corner]

Yes. Though the data gets stale after a while. My Garmin handheld GPSs will ask me to confirm if they haven't been used in a while so they can go looking for the sats where they are rather than where it thinks they should be.

[@geesharp6637]

That one in the box would be useful to put on a wall close to outside and the short antenna. Very educational video. Thanks.

[@jamesybarra4807]

This guy is so ahead of the game, time travel in the rack

[@srrodrichiles2op790]

Me always watching all your videos and don’t even have a computer 🥲🥲 some day I’ll be working in cyber security I don’t know how but here is where I’m starting! Thanks for everything 🙌🏼🙌🏼

[@정호용-l1n]

We've seen the first part of the history of time measurement. And my 9-year-old daughter was interested in it. We also thought about why time measurement should be accurate. thx alot!

[@StormWarningMom]

My dad loved pendulum style clocks. When asked why he was obsessed with them, he simply said, "It's about time." :)

[@mk-6575]

Wow you came to Japan! Please come back, you are always welcome :)

[@sandmanxo]

UTC is an acronym that combines both the way coordinated universal time in english and french, which is why it's UTC. One of the few times that a wiki article gave me some good info.

[@thompsant]

Working with PTP in SMPTE 2110 and AES67 systems, a lot of systems use ptp4l. There is so much about the setup for PTP that wasn’t covered in this that’s very important. Things like the PTP domain is pretty cool. I would encourage anyone who find this interesting to look into PTP and its uses. Running PTP for your homelab or personal computer is wicked overkill.

[@williamb8767]

Agree. There's a lot more to PTP. I work in the broadcast world with 2110 and PTP. Oh, the joy of getting everything sync'ed. Fortunately, I come from the world of SONET/DWDM so timing isn't anything new, but the distribution of time with PTP is definitely some crazy stuff. I thought the same thing after I watched this video. PTP in homelab is overkill.

[@asknight]

Chuck sensed that I had my junk together this morning so he decided to scramble my neurons with this.

[@vladimirpain3942]

From network engineer perspective, we have these cases when routers are loosing connection to hubs, and often it is simply because CMOS dies and server is using time as part of checking licences/credentials. So different time means server will refuse to recognise device and connection is down. Precise time is keeping entire internet up.

[@ckckck12]

Oh cool. I described a tech like this ten years ago to my friend. The goal is that all kinds of devices and recordings and things can be matched up for perfect multi angle recordings or reproduction.

[@Whisker_dev-1]

Network chuck is my favourite KZbinr, I am not even joking like every single day I wait for chuck to upload so I can watch it. thank you for making my day better

[@Thegn]

Can't wait to see the video about the disappearance of the video about the disappearance of the Linus video.

[@freddieb4268]

The only reason I clicked on this video. Linus had a much better video.

[@kozekistudio]

i don’t need a time server, i let my mom tell me the time

[@Megellin]

When you get into digital communications on amateur radio time becomes very important, otherwise the delay in transmissions across the world will sometimes cause you to completely miss a transmission. Most of us end up downloading more accurate time sync software like dimension 4 and disableing the standard time sync in order to get accurate enough time to not have issues.

[@jokelot5221]

I'm getting my R.Pi tomorrow, cant wait to test it.

[@cmdr_stretchedguy]

My alarm clock, my microwave, my stove, and the radio in my truck have no digital way to sync. So they are all typically within 2-3 minutes when I set them. Also several of the clocks end up slowing down as time goes on, but usually the power surges reset the clocks every few months so they get reset/updated that way.

[@chaos.corner]

Radio set alarm clocks are great. You don't have to do math first thing when you wake up.

[@calebleonard6173]

Dang it chuck! Why you gotta be so entertaining, inspiring and persuasive. I’m too poor for this (in all honesty your channel’s so fun! Subscribed!)

[@CappellaKeys]

I was in the middle of commenting on your LTT video before it became private 💀

[@wpgspecb]

NetworkChuck is a shill, thats what.

[@gbgnygtfvr5v114]

​@@wpgspecbpls dude stop commenting this under every comment u don't know whether he is a shill or not

[@ThelmaTaylor-i6l]

这个视频绝对是我今年看过的最棒的！

[@WilliamHollinger2019]

Dang I learn a lot from this guy. My dad told what he knows about time.

[@kumakumakumachoco]

Earlier this I went to the VLBI radio observatory in Oshu city Japan. One of the telescope used to create the first image of a black hole. I was able to enter the control and server room for the telescopes but the room holding the atomic clock there was the only one no access is allowed.

[@jacevedo770]

This solution is less expensive compared similar products on the market. Worth a look!

I used to have 3*6 antennas up per clusters... All on a ceiling. I won't dive into the details but all I am going to tell you is, there's quite a bunch of hardware work needed. Cable loss to account for, amplifiers and things to put in place in case lighting hits your antenna. IF you decide to run a long cable and deploy that antenna on your roof I highly suggest you to get help from the company who's selling you the product and ask them to be HONEST with the full cost / install aspect. Companies deploying these aren't average joe's businesses and I constantly had to go on the data center roof to do inspection and maintenance despite redundancy. If you set this up without redundancy and a secondary solution you will very likely jinx a lot of business critical services...

[@NvidiaRTX5080]

2:07 needs to be a little more specific. No quartz does not perfectly line up with a power of 2 frequency. It's close, but nowhere near close enough to be used as is. What is DOES do, is vibrate with a very high Q favtor reliably, and we can then cut the physical crystal to "tune" it exactly where we want it.

[@gregodfather6086]

true. he makes it sound like it is just a coincidence that quarz in general vibrates at this multiple of 2

[@lifefromscratch2818]

Nice to see something different discussed for Homelab.

[@TheBroadcastEngineer]

We use PTP to synchronize audio over IP (like VOIP but much higher quality). We use that in radio and TV.

[@anthonyp2003]

I was first exposed to this 12-13 years ago in a manufacturing plant. The site manufactured intravenous medications that were encapsulated in polymer designed to break down at a constant rate in human blood, guaranteeing a consistent therapeutic dose. Insane amounts of automation and monitoring. Losing 1 second of data could result in a loss of 7-8 figures. We used another product not mentioned here that used PTP under the hood to have microsecond latency but not nanosecond at that time.

[@MartinJohnKintanar]

A bit mad I wasn't able to post this in time in your hot take video about LTT taking Comptia A+ so I'm posting it here. Not an attack but I actually felt where that video came from. -------- Putting Linus' dramatic and exaggerated antics aside, I still think his points are valid. I'm from the Philippines and got my degree in IT here. What ticked me was Comptia "partnered" with some instructors and gaslight (mild exaggeration) you to taking it. They were suggesting that this is the way to get into a great employment. I mean I get that it definitely helps you become more marketable, but its not like THATS THE ONLY WAY to get in. I definitely felt their ways were predatory especially for students who is just about to graduate. We eventually didn't take it because it was too expensive. What usually happens then is most graduates went into freelancing and/or getting into more specific certifications in other areas of IT expertise which I think is a lot better.

[@wpgspecb]

NetworkChuck is a shill, thats what.

[@massimopraendi]

He puts a lot of effort in picture it like it's near impossible or very hard to enter into IT without a certification, and i see a lot of that mindset in mostly all forums or videos about certs I think the first scene in LTT nailed that sentiment, and not everyone (obviously not NetworkChuck) noticed it

[@零云-u7e]

Oh this is handy. I remember back when ntp was hacked. There are these old protocols and services where everyone was like, "it's just a matter of time." It happened. Freejacked. That historical attack was over 20 years ago, along with true lan hopping. Good ole days. Down the road, I bought a Vishera. AMD put their own clock on board which basically doubled precision. It took a special system config in Windows. That's when I got interested in timing performance. Ultimately, clocks are least path of resistance design, follow the bottlenecks. It's pretty cool to study. That Vishera FX-6300 still runs today at under 70F, thanks to Arctic MX under every heat sink and a Harley sized CoolerMaster.

[@redlion6505]

So this is super cool. Consider this: time is based on planetary movement, various rotations really. So accuracy may not necessarily come down to smaller and smaller fractions of time, but rather hitting a target where the timepiec's accuracy is perfectly nsync, like Justin Timberlake and uh.... Those other dudes, with the particular rotation for which you are currently interested in, ie a year being the time from the particular phase of one harvest to another or a second being a fraction of a fraction (the second fraction, which is why it called a second) of the 24 pieces of time that make up one rotation of the planet. Unless of course the earth is flat, then there is no time, only ice walls and leap frogging plane expeditions into a neverending frozen tundra!

[@stan.rarick8556]

"You might be wondering why UTC is the abbreviation for Coordinated Universal Time. The acronym came about as a compromise between English and French speakers: Coordinated Universal Time would normally be abbreviated as CUT, and the French name, Temps Universel Coordonné, would be TUC. "

[@chaos.corner]

I believe France wanted it through Paris too so there was definitely some wrangling. The funny thing is, the line for UTC isn't even through where it's marked at Greenwich these days. Tom Scott and Stand up Maths have good videos about it.

[@kevinshumaker3753]

RPi, GPS USB Dongle ($10), Chrony, instant time server. Have a couple for my HamNet portable, have a VM on home server (also fed by a $10 USB GPS). Easy-peasy.

[@timballam3675]

The standard pi doesn't have the PPS input unlike the CM4 (this is broken out on the CM4 dev board) you also need a better GNSS board.

[@kevinshumaker3753]

@@timballam3675 How many homelab users need 'nanosecond' compatibility? Even PPS sync is 'extravagant' for most purposes. Nanosecond sync to a GPS source can vary across the reliability of the distance measurements alone, let alone thermal issues. If you really need to be that precise, you need a lot more equipment with a lot higher precision than a Pi (even a CM4) at a higher cost than $1000...

[@BigRonRN18]

I have had a GPS HAT on a Pi for several years now, running as a stratum 1 NTP time server, with a stratum 2 on my router. I’ve looked at PTP several times but I always end when I look at other requirements. Most places say it requires network switches that support for PTP. Part of the PTP process is taking into consideration latency within the network and making connections based on latency.

[@sojab0on]

cmos battery is not only for the rtc crystal but also to keep bios/uefi settings

[@Luiblonc]

Thanks Chuck! As always another great video!! OMG, I’m so onto this “Time Server” board! I actually collect various antique time pieces, and certainly “time” is my favorite mystical subjects. I’m building a “pretend” Time Machine, and certainly will need this device! ;)

[@jaquesmerde9146]

remember back in highschool before everyone had mobile internet and all our cellphones did have a different time. like 5 minutes apart sometimes.. now all our phones just sync automatically

[@Ghrifter]

I'm glad I was able to watch the video about Linus and CompTIA+ before it went down. But I wonder what happened

[@PlatanoSama]

He was being criticized for shilling and not addressing Linus in good faith.

[@CodesExplorer-hb1wr]

Can you tell me what he said because i couldn't watch it

[@PlatanoSama]

@@CodesExplorer-hb1wr to summarize he was just pretending Linus made no valid criticisms, essentially saying Linus just wanted to cheat and that Comptia is perfect and absolutely necessary to get into IT.

[@CodesExplorer-hb1wr]

@@PlatanoSama i can't believe Chuck did this, he's always been soo cool

[@wpgspecb]

@@CodesExplorer-hb1wr Im subbed to him (after not having any clue who he was) only to post "Shill" on every video he makes.

[@errcruze]

“I don’t need other satellites 📡, i need mine so let’s setup 😌”

[@Jarling-so4oi]

I like the documentary like explanations for things, you should do it more with other protocols, networking things

[@jonathangarcia4959]

I am really glad I watched this. Not only with computers but as a watch collector, now I am just that much more fascinated with the craftsmanship, the science it took to be created. Now wear and tear on the crystal itself is another thing. I wonder if the quartz crystal can be replaced? N

[@daviannajones5648]

The Raspberry Pi 5 or 4 in pieces next to the box almost had me crying 😂😂😢

[@VFraunhofer]

I wonder if this could be usefull for recording studio applications where time is critical (just being too much out of clock a little instant causes audible glitch, ruining an entiere session (like a live recording). That's why you find audio interfaces makers like Antelope putting directly "atomic clock" (well, probably not really but they are known as the most timely precises machines) that will act as the clock master for the entiere system, supposedly adding great stability and avoiding this kind of desync. It's also common to use undependant hardware clock whose job is to be the clock reference. I'd love to make try around it

[@indyspud]

FYI 10:30 - stratum 14 is the highest you can go in synchronised steps away from the true time source. Stratum 15 is on the list, however it's actually more of a "I'm configured for NTP but not actually synchronised to anything at the moment" status.

[@BobHenderson-dr2wy]

I was actually for something like this on a USB stick, a little battery backed up time keeper. People don't realize how helpful it is to have all your logs in sync.

[@foxale08]

USB has too much jitter for high precision timing.

[@BobHenderson-dr2wy]

@@foxale08 you only need 1 moment to synchronize, not sure why would need to constantly stream timer frames from a USB device, seems like the hard way to do it. an RTC on a USB stick, it can't be that hard.

[@foxale08]

​@@BobHenderson-dr2wyIf you don't constantly sync you defeat the purpose of having ultra high precision timing as the host will drift.

[@foxale08]

@@tarakivu8861 If you only need millisecond precision you don't need GPS or PTP, regular NTP is fine.

[@elements88xyz]

fun video to watch but the price tag on that thing dayum son =))) £900 ouch

[@attackhelicopter-up3dh]

Yea, you can better connect to a stratum 1 time server.

[@elements88xyz]

@@attackhelicopter-up3dh i’ve recently built one for £100 so a bit of a difference

[@Forbbiden7]

Really nice video like always Chuck 😊

[@Deeany87]

Where’s the LTT A+ video?

[@wpgspecb]

Hes a shill defending CompITA. I never knew who he was until the A+ react video.Hes a shill.

[@freddieb4268]

@@wpgspecb I've heard that the A+ cert was a joke which is why I was hesitant on taking the exam. Linus video was very helpful in deciding to never waste my time. I hope Linus makes part 2 calling out Network Shill.

[@Jcewazhere]

Time. Flies. Time. Bandits. Time. Wounds all heals. Time. ♪ Rosemary and... ♪ Time. Ends. Name the show and you win 3 internets.

[@skellious]

the UTC acronym is a compromise with the french to keep one acronym across all languages. Coordinated Universal Time and Temps Universel Coordonné were mixed together to get UTC.

[@robertharker]

PTP introduces the idea of absolute time. With PTP you can measure if two events happens at the EXACT same time on opposite sides of the planet. Accurate "absolute" time makes most time syncing problems easy to solve. 1728925877 seconds since the epoch is the exact same time everywhere on the planet and in space. Accurate within a few nano seconds (0.000000001 seconds). So now we can answer the question "Did two events happen at the EXACT same time."

[@TallTexasGMan]

We are beginning to see more and more need for precision timing for communications even over ham radio spectrum. Financial sector is one of the biggest users of precision timing for the trading of stocks. I have test instruments and radio equipment that needs a 10MHz reference signal (often provided from time compensated systems).

[@josephpencille625]

Good catch on the edge firewall :) it's always the SOURCE.

[@andybarr2406]

amazing video, love an acturate close. BTW, are you still using Lastpass??

[@guacamolehorizon]

When I saw Lastpass I paused and jumped to the comments. Wth is still using Lastpass?

[@Adam_Elektronik]

video next year "I built my own satellites to synchronize time better"

[@Queekusme]

Clock on my dashcam has drifted 20 minutes since I got it… will re-adjust in the morning when I put it back in the car

[@KTFCUTL]

Been in IT for so long I remember starting on FCC-100's and Promina TDM's

[@1over137]

We were writing a proposal for the Hong Kong stock exchange for a gateway. Their requirements where 20 sessions, 20k messages per second each, under 10uS latency wire to wire. We sent them pcap captures on the NICs. They said, no... on the WIRE. So we had to book the "BIG" lab with infiband optical splitters and the optical time synchronisation to the nano second. Otherwise there was no way to measure latency "on the wire" as any attempt would interfere and trying to run distributed timing logs over TCP without optical splitters would be very difficult. NTP .... not going to cut it in the real enterprise labs or DCs I'm afraid.

[@JorgeReyGMartinez]

Nice! I made the mistake of trying to sync my local NTP server using a USB-based serial ublox GPS dongle... That was a mistake 🤦‍♂ Thanks for this... 👍

[@ArrèyJAE]

Damn, I was about to witness a beef between NetworkChuck and LinusTechTips. Luckily he withdrew like J Cole. 2024 already had so many beef i lost count. The Tech world was about to have one.

[@wpgspecb]

Shill. Shill. Shill.

[@TheHardwarek3r]

I was waiting for you to end the video with "See you next TIME"

[@PurpleSpiritFoxFire]

How's it compare to the solution LTT channel showed where you put the atomic clock on a pcie card and use that to sync devices?