Thank you so much for creating such interesting videos. Over the last few months I have viewed them all, many several times. Having recently retired, I've rekindled my interest in ham radio and am on the air again (WG2E). I'm in the process of improving my RF lab with some new test instruments. Your teardowns and experiments have been very helpful with recent purchase decisions for a spectrum analyzer and signal generator. I enjoy your logical approach to fault finding in the repair videos. Many people I've worked with over the years are just too eager to replace components without enough thought beforehand. One of my mentors had something like this on his toolbox... "Parts replacement should be a result of troubleshooting, rather than a means of troubleshooting."
How wonderful to watch reasoned and directed problem solving in action. You don't have to be an expert in RF to appreciate and learn from the technique demonstrated. Thanks again for a wonderful video, high-quality as always.
Really special being able to follow along with your "thinking out loud", figuring it out in real time with us. Thanks for that. It is nice sometimes to see that side instead of figuring it out off camera and then coming back to show us.
As usual kudos for your honesty...don't know how many times I've sat there scratching my head wondering why something wasn't working...not turned on, cable not connected on one end, both ends, soldering iron not hot 'cause it's off...etc. etc. We're just human and great we can laugh about it. Thanks Shariar for another great video!
Another "must watch" video! Once before bed, once in the morning, again at lunch, supper, and again at bed tomorrow. You are the best! I seroously dont get WHY there aren't more ppl sub'd,.. you should have 63 million, if ya ask me.. Damn simpletons
26:15 I would always have blamed a transformer before a diode due to the possibility of connections fracturing at the terminals. But you are clearly an expert in your field to go straight in for the kill with the diodes. Did you ever do a DC test on the defective part?
Excellent video as always! I have used your videos as inspiration to be more brave about repairing my own gear and I have been successful each time so far!
Excellent job, thank you. I have no idea about most of things that you speak, BUT, I pick things up every time I watch one of your Videos... splendid stuff.....
0:39 that dark gray power supply behind looks interesting. Worth a short video maybe ? Or... maybe not. Looks customized. :) Thanks a lot for this video and all the other repairs, I love them. Cheers from France.
Another great repair video. I have been looking for a good non-contact RF probe, can you recommend a certain model to look for? Maybe something like the one you used in the video? Thanks in advance.
Excellent video, as always. Regarding the probes you used in the video, there seem to be many similar probe sets for sale with tremendous variation on price. Can you offer any advice to a prospective purchaser? Thanks..
Hi can you do a review / teardown of the N1201sa? Lately new versions appeared that contain also a pc interface (microusb). Looks like a good alternative to miniVNA tiny. Thank you
Why is it when you get an instrument it is a diode or a few burned resistors, but when I get an instrument it is some very obscure digital problem that totally kills the instrument!? :(
You mention a PLL at 14:03 that you recognize from repairing an other instrument in the past. What was that instrument? Do you have a video from this repair?
Amazing troubleshooting Shahriar. Your videos have inspired me to learn more theory as it applies to signal analysis. I would sincerely appreciate any book recommendations that cover the basic fundamentals. I am currently reviewing Fundamentals of Spectrum Analysis by Christoph Rauscher as a start but I know there are many other side topics to consider.
Yeah, but will you have his continuous luck in finding stuff that only needs a $2 dollar component replacing or a loose cable re-attaching? I think the cat has something to do with it.. :)
@@Thesignalpath It's OK, I was only kidding. You've done some terrific repairs on the channel. Still, I'm sure that cat has a hand in it all somewhere.. :)
My scope is only good up to 200khz sadly so that tells you this video is beyond my grasp, some day I might finally win a kick ass scope from Electroboom's giveaway -_-, sell my elite oldschool pog's collection, or cash in a kidney to get one....a pause of silence... pours a splash of drank out for all my dead circuits and keeps moving forward!!! lol good video I had to story tell =)
I have repaired five N5181A instruments with Error 508 or bad RF performance. They all had bad U3400/SB99026MN or U3412/1GC1-4218 or both. I recommend that you replace these first.
It still blows my mind how an instrument worth close to 10 grand (according a google search) can be brought down by a little diode package that is probably worth close to nothing.
At 12:38, you mentioned that you took a x-ray earlier. You have analyzed Keysight MXG thrice. TSP #211, #213 and this video. Could you please mention which instrument repair?
عزیز دل سلام شما از این اسیلوسکوپ های رایگول که استفاده میکنی راضی هستی؟ تو همین یو تیوب کلی ویدیو پیدا میشه از مشکلاتی که اینا دارن مخصوصا با کوپلینگ ای سی. اگه شما اوکی من احتمالا یه چهار کانالشو میخرم
Why not to add a PayPal account for supporting your great training videos. Not everybody is happy with CreditCard based recurring Patreon debits. I would be happy to send 75$ now, more in the future.
Nice repair - and lucky that it was so easy to work on when powered up!
Thank you so much for creating such interesting videos. Over the last few months I have viewed them all, many several times. Having recently retired, I've rekindled my interest in ham radio and am on the air again (WG2E). I'm in the process of improving my RF lab with some new test instruments. Your teardowns and experiments have been very helpful with recent purchase decisions for a spectrum analyzer and signal generator.
I enjoy your logical approach to fault finding in the repair videos. Many people I've worked with over the years are just too eager to replace components without enough thought beforehand. One of my mentors had something like this on his toolbox... "Parts replacement should be a result of troubleshooting, rather than a means of troubleshooting."
Amen. Me, too. de KQ2E
How wonderful to watch reasoned and directed problem solving in action. You don't have to be an expert in RF to appreciate and learn from the technique demonstrated. Thanks again for a wonderful video, high-quality as always.
Really special being able to follow along with your "thinking out loud", figuring it out in real time with us. Thanks for that. It is nice sometimes to see that side instead of figuring it out off camera and then coming back to show us.
As usual kudos for your honesty...don't know how many times I've sat there scratching my head wondering why something wasn't working...not turned on, cable not connected on one end, both ends, soldering iron not hot 'cause it's off...etc. etc. We're just human and great we can laugh about it. Thanks Shariar for another great video!
This channel is just premium.
this system architecture really seems perfect for a video like this, and great to work on (only some silkscreen labels would have been nice)
Like before pressing play ... that's how you must do it when you are dealing with a quality channel (best regards from Romania!)
Another "must watch" video! Once before bed, once in the morning, again at lunch, supper, and again at bed tomorrow. You are the best! I seroously dont get WHY there aren't more ppl sub'd,.. you should have 63 million, if ya ask me.. Damn simpletons
26:15 I would always have blamed a transformer before a diode due to the possibility of connections fracturing at the terminals. But you are clearly an expert in your field to go straight in for the kill with the diodes. Did you ever do a DC test on the defective part?
Yes, I did. The diode was an open.
Excellent video as always! I have used your videos as inspiration to be more brave about repairing my own gear and I have been successful each time so far!
Spotted the lost 1GHz signal right off the bat! Good work as always.
Excellent job, thank you. I have no idea about most of things that you speak, BUT, I pick things up every time I watch one of your Videos... splendid stuff.....
This video is the definition of your channel name😀👍
Excellent as always. Thank you for another comprehensive teardown and repair, thoughtfully done so that all can easily understand.
I've seen all your videos and this is in my top 10 favorite.
I agree. Exciting journey through this instrument.
0:39 that dark gray power supply behind looks interesting. Worth a short video maybe ? Or... maybe not. Looks customized. :)
Thanks a lot for this video and all the other repairs, I love them. Cheers from France.
Operation confirmed via CAT Scan. ; )
Highlight of the week, a new TSP video. Really liked this one, thanks!
This was really one masterful repair. amazing! I still say you should build one and open source it. WE KNOW YOU CAN DO IT!
Another Great video, thanks so much Dr.sharihar , can you make a video about frequency multiplication techniques
Your knowledge is outstanding 😮
Excellent fault finding, and as always very clearly explained. Thanks.
Great walk through
Good find.
Thanks for sharing :-)
Very smart way of trouble shooting👍
Simply impressive,
Our theoretic physics professor said: Thermodynamics is constructed by mankind, but electrodynamics is created by Himself.
Nothing is constructed by anything. Theories of thermodynamics and electromagnetic model, represent and predict behaviors of nature.
What a crazy wonderful channel !!!! Thank you for your videos!
Nice repair video 👍
That was very cool. A solid repair video on a good machine.
Excellent video. I have enjoy it very much!
Thanks
Thanks very much for your excellent video!!
Fantastic, love these sort of videos
Another great repair video. I have been looking for a good non-contact RF probe, can you recommend a certain model to look for? Maybe something like the one you used in the video? Thanks in advance.
Excellent video, as always.
Regarding the probes you used in the video, there seem to be many similar probe sets for sale with tremendous variation on price. Can you offer any advice to a prospective purchaser? Thanks..
What type of diode was in the doubler?
Hi can you do a review / teardown of the N1201sa?
Lately new versions appeared that contain also a pc interface (microusb). Looks like a good alternative to miniVNA tiny.
Thank you
Outstanding; love your logical thinking. What would you charge for that repair?
Awesome video!
Why is it when you get an instrument it is a diode or a few burned resistors, but when I get an instrument it is some very obscure digital problem that totally kills the instrument!? :(
Maybe the universe is trying to tell you something.
also you can perform the self tests routine and get more information about the failure . For example for the reference it will be an 200-208 errors.
You mention a PLL at 14:03 that you recognize from repairing an other instrument in the past. What was that instrument? Do you have a video from this repair?
250 MHz is "very low frequency" 😏
He's a microwave engineer.
Really enjoyed this one, using an EMC probe for fault finding instead of compliance testing. (Sorry Dave, that's all a bit of a yawn to me!).
Amazing troubleshooting Shahriar. Your videos have inspired me to learn more theory as it applies to signal analysis. I would sincerely appreciate any book recommendations that cover the basic fundamentals. I am currently reviewing Fundamentals of Spectrum Analysis by Christoph Rauscher as a start but I know there are many other side topics to consider.
No need cable, just need more RF power! :D
Haha, with enough power, anything is a short circuit! ;)
many years ago I had been fixing taxi radio sets this way(using rf probe))
Nice
I wonder what the 6GHz option adds to the architecture?
Just preamplification it looks like
It adds an upper band to the output. It may just be a software lock actually.
👍 Good job sir 👍 Thank you 🙏
Very nice repair, I really need to buy some more broken test gear...
Yeah, but will you have his continuous luck in finding stuff that only needs a $2 dollar component replacing or a loose cable re-attaching?
I think the cat has something to do with it.. :)
@@trickyrat483 That is not entirely true. Several >$500 repairs have also come up.
@@Thesignalpath It's OK, I was only kidding. You've done some terrific repairs on the channel. Still, I'm sure that cat has a hand in it all somewhere.. :)
Bravo! 👏
Hope you make a vedio on ka band amplifiers
What is your type /model EMC probe set? you use?
👍
I wish other RUclipsrs would utilize their fancy tools for troubleshooting like this instead of just using them for clickbait unboxing videos...
where can we get the block diagram of MXG
wow，new video , great!
Another great repair and another expensive piece of kit rendered broken by one inexpensive part.
Pooch approved!
What is the make of emc probe you are using?
I know it's been a while but it's from a Tekbox set. They are also sold by Signal Hound.
Have you some idea in why the attenuator are under light?
Troubleshooting? Other status LEDs on that board that would be likewise invisible under the RF shield.
@@trickyrat483 nope that got sure is not the reason. He have to be because they want to change the silicon properties by exposing it to some light.
@@vaualbus No, definitely not. They are debugging LEDs.
@@Thesignalpathoh than so it easier than what it seem😂
@@vaualbus Wank factor, it looks really cool.
I'm almost feeling sad for bringing likes up to 128 from 127. It was a perfect, maxed out 7-bit number :/
гуд
Beautiful :)
Hi The Signal Path, I have N5172B device has got Error 508 Synthesizer Unlocked, Could you give me the instruction to fix it?
How would you fix a N5181A error 304 PLL under is 0 must be 1 ?
Why not sell repaired equipment with a sticker "Fixed ant tested by SignalPath" - and a link to that exact repair video? :)
My scope is only good up to 200khz sadly so that tells you this video is beyond my grasp, some day I might finally win a kick ass scope from Electroboom's giveaway -_-, sell my elite oldschool pog's collection, or cash in a kidney to get one....a pause of silence... pours a splash of drank out for all my dead circuits and keeps moving forward!!! lol good video I had to story tell =)
i has issue with error code 508, synthesizer unlocked. can you give me how to fixed it?
I have repaired five N5181A instruments with Error 508 or bad RF performance. They all had bad U3400/SB99026MN or U3412/1GC1-4218 or both. I recommend that you replace these first.
It still blows my mind how an instrument worth close to 10 grand (according a google search) can be brought down by a little diode package that is probably worth close to nothing.
That's probably still a $25 part due to performance guarantees... but compared to $10k for the whole thing, it is pretty much nothing.
Keysight make money same way as Apple - built-in failures and zero documentation on how to repair it. :)
At 12:38, you mentioned that you took a x-ray earlier. You have analyzed Keysight MXG thrice. TSP #211, #213 and this video.
Could you please mention which instrument repair?
If they have nothing to hide, a few hints from silk screen labels would have helped speed up this repair. What do you think?
They don't have something to hide, they have something to protect.
عزیز دل سلام
شما از این اسیلوسکوپ های رایگول که استفاده میکنی راضی هستی؟
تو همین یو تیوب کلی ویدیو پیدا میشه از مشکلاتی که اینا دارن مخصوصا با کوپلینگ ای سی.
اگه شما اوکی من احتمالا یه چهار کانالشو میخرم
Glad not to see silkscreen and learn how to try and interpret layout architecture in repair
Why not to add a PayPal account for supporting your great training videos. Not everybody is happy with CreditCard based recurring Patreon debits. I would be happy to send 75$ now, more in the future.
Thank you. I will try to set this up.