TSP

[@ThatEngineerGuy_]

Been in product development for 7 years and I’m still in fake it till I make it mode when I watch some of his videos. He’s a gd wizard. Absolutely brilliant. Cheers 🍻

[@alandoak5146]

My EE internship was at NIST in the Phase Noise Measurement Group. The group leader was Fred Walls, who held the patent on cross-correlation, and was the scoutmaster of our troop when I was a kid. I didn't have adequate boots on one of the winter campouts, and he kindly and skillfully de-thawed them on his chest; 38 years later, and I still remember him teaching me to visually verify that my gear is loaded into the vehicle before leaving.

[@davidv1289]

Analyzing the block diagram and determining where to look is the key to all troubleshooting. Thank you for another excellent video. Regards, David

[@Darkknight512]

A single cold solder joint in a large, complex and expensive instrument... and this is why we test then vibration test and then re-test satellites.

[@JohnGotts]

$40,000 used. That was a good repair.

[@hapskie]

YT needs to implement spoiler alert comment functionality...

[@guycaron3858]

Hi, at 15:38, it looks like you put the board in the wrong orientation relative to the cavity in the back piece?

[@unknownhours]

Looks like it's keyed so you can't get all the screws in if it's backwards.

[@c4t4l4n4]

I hope we get a reply from Shariar on this. My OCD kicked in immediately, 😁

[@mensaswede4028]

Yes it was backward for a moment, but I’m sure he corrected it.

[@Thesignalpath]

You are right, in the shot I am holding it together in the wrong orientation. But the final assembly is the right way around. It actually doesn’t line up if you try to close it incorrectly.

[@xDevscom_EE]

Cross-correlation can be also applied on low frequency (sub-Hz) signal analysis to reduce the noise floor limitations. I'm curious to try it some time later with nanovolt detectors... Also I'm interested in seeing "Ultra low noise DC source" in this E5052A, any chance to see what's special about it next time you dig into 5052s?

[@Thesignalpath]

Sure, I’ll talk about it next time we see one. :)

[@BerlinCinch]

Hi Hope you're well ! thank you for your enlightenment , I have an Agilent E8362B which displays a PHASELOCK LOST error message and I was wondering if you could source a service manual and some ideas on where to start fault finding ? regards

[@danyoung5786]

This device also has another use, which is to measure the noise of LDO or OP AMP using the baseband port. The noise diagrams on the datasheets of TI/ADI seem to have been obtained using this method.

[@romanrosikon3791]

Great job buddy! Will there be a video of imaging and replacing HDD with SSD?

[@summatim]

Summary was generated by Summatim, let us know if there are any inaccuracies! 🤖 0:08: Introduction 0:14: Phase noise measurement 0:32: Cross correlation technique 1:26: Basic measurements 1:45: Preliminary testing 3:08: Fault detection 7:41: Debugging 9:46: Signal path 10:37: Detector testing 11:13: Frequency-dependent issue 12:02: Measurement of S-parameters 13:05: Broken connector 14:41: Reflowing the connector 18:07: Testing the repaired instrument

[@TheElectronicDilettante]

Thanks as always for your great videos. I was hoping to ask your opinion on an oscilloscope, if you don’t mind. I’ve recently learned of an Agilent 548308 DSO oscilloscope. The price it’s going for seems really low for the capabilities it has . One example is that there is Agilent software that gives it VNA functionality. Any thoughts or opinions will be greatly appreciated. Thanks again

[@CraigPetersen12f36b]

Hmmmm, at 29-39k on eBay I guess I'll have to wait. :) Nice instrument.

[@stevefriedl3983]

And it appears that the new model E5052B is north of $100k. I'll wait for Rigol 🙂

[@websterleone]

Would have liked to see the actual fixing of the connector, but still interesting. Understanding phase noise is a bit past my area of expertise, but something that would be worth learning the basics of for my job.

[@citizenrich]

Awesome video as usual, thanks!

[@ViniciusMiguel1988]

It’s always the connector! 😅

[@romanrosikon3791]

Great job buddy! Will there be a video of imaging and replacing HDD with SSD?

[@neonkev7866]

SPOILER ALERT ⚠️ Ah, the classic cold solder joint. Is there a difference in the RF performance between the A and B models or is it essentially a computer upgrade? Looking forward to if/when you can score the E5053 downconverter. Would be interesting to see how they preserve the phase noise floor for higher frequency signals.

[@xDevscom_EE]

C'mon , no spoilers please :)

[@neonkev7866]

@@xDevscom_EE whoops! I'll have to add a spoiler alert.

[@ChrisSmith-tc4df]

In addition to the computer upgrade, they improved the phase noise floor of the two 10MHz reference oscillators by switching to 3rd party Wenzel Associates OCXOs that have adapter boards to mimick the original 10811E that they replaced.

[@ChrisSmith-tc4df]

My E5052B OCXO assemblies are marked Agilent E5052-26559-002 with custom Wenzel 500 Series OCXOs within them. They are sturdy aluminum frames that mimick the 10811E vibration mounting points along with an integrated adapter PCB with a short 6-wire cable attached that terminates into a 6-position single-row 0.1" latching header socket.

[@Thesignalpath]

Thanks. If you look at my phase noise video, there I take apart the B revisions and you can see the new OCXOs.

[@Nik930714]

When you mention imaging of the HDD and uploading it to an SSD it got me thinking. What is the correct way to do for this kind of instrument that is running older operating systems where you are not 100% sure how they boot? A sector by sector image and not a normal partition style image, or am I missing something? I've worked with a lot of SBCs running various kinds of embedded Linux systems and depending on the processor, imaging them can be different, but I've never worked on something this old that is probably running some sort of Windows.

[@simontay4851]

How is the RF input section interfaced to the PC motherboard? Is there a custom PCI card? As the CPU is a Pentium3, it won't have PCIe.

[@otherbasis8505]

I'm second that, in this case, replacing the HDD with an SSD is a bad idea. SSDs are not good long term _cold_ storage devices. They work fine in regular powered instruments because they periodically refresh old blocks. Modern high density SSDs are multi-layer - very sensitive to trapped charge leaks.

[@tocsa120ls]

Oh that was a lucky break. *rimshot*

[@peterhansen8216]

at 15:35 did you put the back on upside down?

[@Thesignalpath]

I made sure it was assembled the correct way before I put it all together. :)

[@BersekViking]

"It's only 7GHz, so it's very low frequency" :) Sure, everything over 1GHz is black magic to me. :) 73 de LA8SB.

[@supercompooper]

Can it do down to 1Hz?

[@danyoung5786]

Yes, but the measurement is even slower.

[@supercompooper]

@@danyoung5786 of course

Just 7GHz - very low frequency. YMMD!

[@michaeljordan494]

I'm intereted about perpendicular mounting of the oscillators.Can anyone share any reference to it

[@dtiydr]

20:04 It only went to 91% and not 100%, I'm very, very unhappy.

[@WolfmanDude]

As a video idea: Could you maybe do a video how to measure noise figure and IP3 with a normal SA and cheap/normal parts?

[@viperwizard491]

I think SSD is not great for reliable long term data storage. If ROM data corruption may happen after ~30y , then untested modern two or triple level memory cell is unknown territory

[@universeisundernoobligatio3283]

Long term storage cal data storage use a FRAM

[@viperwizard491]

@@universeisundernoobligatio3283 HDD

[@neonkev7866]

If you're concerned about SSD reliability, using an SLC drive would be optimal in all regards except storage density and price. However, even SLC drives of reasonable size can be had affordably now.

[@viperwizard491]

@@neonkev7866 doubt that this instrument requires high capacity storage,. SSD storage claim 100y @25C (radiation can affect data redundancy as well) Our repair workshop have ~10% rate for consumer MCU fail to boot (I guess because of memory corruption or some silicon defect)

[@Ziferten]

First! Because... it matters! Mostly I'm just excited about new TSP!

[@douro20]

go away

[@supercompooper]

Soon, in Florida, it will be illegal to measure TRANSients😅

[@sirousmohseni4]

Too complex for me!!!!!