TSP

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Күн бұрын

In this episode Shahriar repairs an Agilent 8163A Lightwave Multimeter. The instrument shows a flickering screen and does not boot. The teardown of the unit is presented along with a general instrument architecture. The power supply is verified for functionality and the instrument simply comes back to life on its own! It most likely has had a poor internal connection which is resolved after reassembly.
Two modules are also presented, a dual-input InGaAs power sensor module as well as a dual Fabry-Perrot laser module. The teardown and analysis of both are presented along with wavelength and spectrum measurements.
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Пікірлер: 50

@EdwinSteiner 3 жыл бұрын

Shahriar's reputation is such that instruments resume operation out of pure fear.

@ebrombaugh 3 жыл бұрын

"Oh darn - it works." :)

@erikbertram6019 3 жыл бұрын

You must have fixed it when you took off and put back the 50 Ohm termination in the back. Statistically speaking, it being a problem with a coaxial connector is very likely on this channel.

@heathwellsNZ 3 жыл бұрын

Oh my gosh... that thumbnail... love it... "cat scanner"

@hernancoronel 3 жыл бұрын

Me: buy a simple used power supply to fix a similar one I have, end up with two broken ones and no idea how to fix them. Super Uber KZfaqr with an x-ray machine equipped shop: buys broken high end instrument and ends up fixing it by just opening it up!

@AL6S00740 3 жыл бұрын

ahahahhaa prety much the case ... always

@pmarquisYT 3 жыл бұрын

Reminds me of the days when I was working at a plant where we built fiber optic meters of all sort. I like your videos and your knowledge, keep going! ;)

@MusicMediccom 3 жыл бұрын

I loved watching this video, it was very insightful!

@redtails 3 жыл бұрын

Could you give us an overview video of the insturments which you have collected and repaired over the years? I get the impresion that your homelab is one of the most impressive collections ever

@jimm2099 3 жыл бұрын

You are the most influential electronics person I've ever encountered hands down! I have probably fifteen or so instruments I brought back to life many years ago. You may have a more musical background than me. I recently watched a music oriented video that referred to harmonics and realized that there is real relation between the two. Crazy right? I wanted to demonstrate that, but thought you'd be a way better teacher than me. Let me know if you are interested, it is a KZfaq channel hosted by a PHD in music.

@sstorholm 2 жыл бұрын

The reason for the coils of fiber has to do with the splices, you need to bring the splice to the splicing machine, so there always needs to be quite a bit of extra fiber in any splice box. The pigtails (fibers with connectors fitted) are usually 2 meters long, but are commonly cut down to a more manageable length depending on the application.

@AndrewZonenberg 3 жыл бұрын

Obviously Pooch fixed it when you weren't looking ;) Would be cool to see an OTDR at some point. Or any other optical test equipment.

@lasersbee 3 жыл бұрын

Just removing and re-plugging connectors can fix oxidation on low power connector pins that may be intermittent.

@cjxordi 3 жыл бұрын

2:11 Lets spend one minute of silence for botched mod wire left top corner.

@DasIllu 3 жыл бұрын

Loose connectors and cold solder joints where a nice source of easy to fix device in my youth. Sadly it all shifts towards disposable electronics. This is why i like devices like this. If they break you still have an incentive to fix them. Nobody would recap a something like a 5 year old smartphone.

@ruhnet 3 жыл бұрын

First! Happy to see another great repair! :-)

@CNe7532294 5 ай бұрын

2 years too late but the fan is meant to cool down the display. Specifically the led backlight does get hot. I don't use this particular model yet but I have many RF power meters (i.e. E44xyz; xy being 18 or 19, z being A or B) that have this same form factor and design.

@catalinalb1722 3 жыл бұрын

Hello, what do you think about the new nanovna v2 plus 4? A full review video will be highly appreciated 😊👍

@GeorgeTsiros 3 жыл бұрын

3:00 look where the tiny fan gets power from... so bizarre 😳

@amirb715 3 жыл бұрын

awesome :-)

@glasslinger 3 жыл бұрын

No doubt the cat that was in the module bay was the problem!

@buildstoys 3 жыл бұрын

Love it when things fix themselves :)

@dtiydr 3 жыл бұрын

I don't because then you don't know what was the reason and it could thus most likely happen again.

@TeslaTales59 3 жыл бұрын

Magic repairs! Maybe it was the cat...

@egonotto4172 3 жыл бұрын

Huge lab. I suppose, there is even a time machine

@douro20 3 жыл бұрын

Do they use those NTT Optipop fiber cleaners where you work? Those things are very nice.

@ovalwingnut 3 жыл бұрын

Pornographic & Titillating material that I can't seem to stop watching. I may need to seek professional help. Until then, it feels so dang good! Thank You TSP.

@douro20 3 жыл бұрын

I didn't think it was even possible to field calibrate a semiconductor laser as simple as a Fabry-Perot one, unless there is some kind of active nonlinear optic in front of the laser diode inside the module.

@Richardincancale 3 жыл бұрын

4:00 I was wondering when the two beakers of liquid were going to come into play - water cooling?

@auSMEAC 3 жыл бұрын

Fixed it. Well that's unfortunate 🤣🤣

@ogitakasi3030 3 жыл бұрын

I use this guy in my lab

@GeorgeTsiros 3 жыл бұрын

what the hell?! Let Shahriar go!!!

@ogitakasi3030 3 жыл бұрын

@@GeorgeTsiros lol i meant Agilent 8163A

@BruceNitroxpro 3 жыл бұрын

Now all I need to do is follow what you say as you really talk very quickly! LOL

@AissaAzzaz 3 жыл бұрын

Dr pooch in thumbnail Forget that thesis

@leocelente 3 жыл бұрын

Interesting to see all those fine pitch quad flats but no BGA. I don't think I've ever seen a QFP x86 processor. Was this simple cost saving or there is something else to it?

@joshdau 3 жыл бұрын

This device is likely very old, pre-dating mainstream BGA. Would have likely been incredibly expensive to reliably produce a device using BGA parts.

@linuxaos 3 жыл бұрын

Shahriar, what is that "bananafy" board in front of the electronic load ?

@largepimping 3 жыл бұрын

e.g.: www.ebay.com/itm/DC-Electronic-Load-Banana-Jack-Adapter-Board/154246499734?hash=item23e9cecd96:g:hb8AAOSwZ2FfSeuR www.eevblog.com/forum/repair/dc-electronic-load-banana-jackplug-converter/ www.tindie.com/products/iohippo/dc-electronic-load-banana-jackplug-converter/

@linuxaos 3 жыл бұрын

@@largepimping Thank you my brother !

@Thesignalpath 3 жыл бұрын

I see someone already pointed you to the right place. I bought mine from Tindie. :)

@ruhnet 3 жыл бұрын

Well, the repair was a flop; the kind of flop you _want_ to happen when actually repairing something. 😁 I guess it must've been a loose ribbon cable or the like. The experiments however, although relatively simple, were very interesting and made up for the non-repair. 👍😁

@cda32 3 жыл бұрын

Isn't that doped fibre?

@Thesignalpath 3 жыл бұрын

No, I don’t see why that would be needed.

@k1mgy 3 жыл бұрын

But, it's not fully repaired until you know why it broke.

@Thesignalpath 3 жыл бұрын

A loose connection between the LCD module and the main board. Or a loos connection on one of the EPROM firmware ICs.

@vornamenachname4777 3 жыл бұрын

Neighbours can dedected your waves

@dine9093 3 жыл бұрын

Where is the cat? i came here specifically for cat.

@Thesignalpath 3 жыл бұрын

He was napping somewhere! :)

@dine9093 3 жыл бұрын

@@Thesignalpath it's fine we'll let you of this time. That display of overengineering made up for it. This abundant use of silicon just wouldn't fly in 2021, not with the state of today's supply chain... sigh