Products > Test Equipment

Test Equipment Anonymous (TEA) group therapy thread

<< < (25153/27436) > >>

25 CPS:
I was just reading the latest on the Rogers fiasco:

https://www.cbc.ca/news/business/rogers-outage-cell-mobile-wifi-1.6514373

The what a disaster.  The last time, it was just cell phones.  This time around it's practically everything in their telecommunications business and the secondary effects have been far reaching from everything from the cell network being out of action, internet out of action, data backhaul for other things out of action and the secondary effects have been significant.  Apparently the Interac debit card systems are down, the ArriveCAN app is down and it's not like that hasn't been singled out for criticism before this happened, and I've heard some real horror stories about people melting down about bank machines not working when they go to get cash to use at places where the merchant terminals are down because of this.  I've been home all day so I haven't had any first hand experience but from everything I've seen online and heard from friends, it sounds like it's just been a giant cluster.

The really bad thing is twice now, Rogers has provided a great example of what happens if a large chunk of a whole country's telecommunications infrastructure crashes out.  I'm sure there are criminals, terrorists, unfriendly governments, the works quietly watching this mess playing out for the second time and making notes.

Cerebus:
The truly worrying thing about the Rogers meltdown is if there is anyone competent at Rogers and they were listened to it would not be possible for all of the infrastructure of a telco, encompassing Internet, voice, private data and so on to collapse together.

The only way this can happen is by creating a single point of failure for a collection of systems that, if built organically, or haphazardly, or even randomly, would not naturally have a single point of failure. You have to really go out of your way, and be monumentally stupid, to create a scenario where this is possible.

My whole life in the ISP/telco world was about building in as much fail-safe, redundancy, and generally avoiding "house of cards" scenarios as ingenuity and budgets would stretch to. i.e. the exact opposite to what Rogers must have done.

I've presided over some nasty outages in my time, but the longest one I can recall that affected multiple customers simultaneously was about 4 hours, and was restricted to just one area, perhaps one Internet PoP, or a set of International voice routes, etc. etc. I never had a whole network fuck up that took out all services and the worst, as in largest number of customers affected, would have BGP related, taken 15-30 minutes to fix and perhaps two hours for everything to settle back to normal.

Incredible, truly incredible.

There's been a trend recently for larger and larger service providers to somehow manage to cause whole network crashes which affect millions of direct and indirect customers. That's worrying in itself, but no one seems to have managed to fuck up as comprehensively as Rogers appear to have.

tautech:

--- Quote from: Cerebus on July 08, 2022, 11:20:53 pm ---The truly worrying thing about the Rogers meltdown is if there is anyone competent at Rogers and they were listened to it would not be possible for all of the infrastructure of a telco, encompassing Internet, voice, private data and so on to collapse together.

The only way this can happen is by creating a single point of failure for a collection of systems that, if built organically, or haphazardly, or even randomly, would not naturally have a single point of failure. You have to really go out of your way, and be monumentally stupid, to create a scenario where this is possible.


--- End quote ---
Worldwide, these sort of failings can be traced to one failure point......bean counters !
Actually it's more serious in that the western systems rewarding CEO's for their profitability or not driven, by rewarding shareholders being their biggest focus rather than staying in their lane and sticking to their knitting where bean counters get into positions of far too much influence and suck the CEO's into this downward spiral.
We'll see more of this in the next while is my prediction.

mnementh:

--- Quote from: tautech on July 08, 2022, 08:50:57 pm ---
--- Quote from: mnementh on July 08, 2022, 07:10:48 pm ---
--- Quote from: tautech on June 29, 2022, 10:52:06 pm ---
--- Quote from: tautech on June 29, 2022, 10:11:52 pm ---
--- Quote from: mnementh on June 29, 2022, 09:49:24 pm ---The LeSiglent T3DSO2102 is my big Father's Day present from wife and dad

--- End quote ---
IIRC it's a SDS2102X with inbuilt 25 MHz AWG and 140 Mpts mem depth. You should be able to improve it to 300 MHz however it probably comes with 100 MHz switchable probes although it has autosense which IIRC will detect 10x and 100x probes.
I had the 300 MHz 4ch model for a few years and have a pile of FW versions for these although you might need some tv84 CFG magic to convert it back to a Siglent.
--- End quote ---
Oh and mnem, keep your eyes open for the SPL2016 16ch digital probe set but not just in Siglent colors as these also are used by LeCroy, Tek and Rigol and there's also the DIY thread to make a set:
https://www.eevblog.com/forum/testgear/diy-logic-analyzer-probe-and-pods-for-siglent-scopes/
However the OEM sets with the nice 10 way silicon ribbon coax is far superior to anything you can cobble up at home however Defpom did a reasonable job converting a set he got off ePay to fit his SDS2104X Plus.

--- End quote ---


What's your take on TK's adapter for the HP pods? Yay or nay vs oz2cpu's adapter?



mnem
 :-/O

--- End quote ---
TBH if you can be bothered to cobble something together use the oz2cpu/Defpom method.
Why, because of mwyatt's contribution simulating my measurements to come up with the values of the passives in the networks of the OEM probe.
These things OEM whom as yet I've not found who makes them are damn expensive but don't forget a 20 lot of decent  quality grabbers alone will set you back a C note !

Or if you not in a hurry, keep an eye out for one that looks identical but made for LeCroy, Tek or Rigol and a little sleuthing on each of their websites will get you the Pt. # to look for.......then post them in the DIY thread for the benefit of others.  ;)

I'm 100% they all have the same OEM and the twin thin silicone 8 way ribbon coax (that's a mouthful ! ) is a thing of beauty and near impossible to emulate unless you got mates in the company where it's made to get offcuts !
That's why Defpom went the route he did so to get something nice for his efforts rather than some cobbled together twisted pair mess.

Last year Siglent were specialing SPL2016 + MSO/LA and AWG/FG licensing with a new SDS2000X Plus for just $ 219 that was one hell of a deal compared to shelling out retail for each.
--- End quote ---

Actually, I was thinking to make a header so I could plug the HP pod and whip leads directly into the oz2cpu scope PCB. As I said, those will probably be more than long enough for anything I'd be doing, unless I change my mind and put the scope up higher on my bench, which is pretty unlikely ATM.

I was asking about MK's project since you linked to it at the beginning of the SDS2000X thread. :-// Not knowing what the difference is between the Siglent frontend and the HP braided cables, I'm leery of just plugging random lengths of either braided cable or micro-coax into the front of the scope without any compensation, or the wrong compensation. I saw the issues oz2cpu was having there in the beginning.

mnem
 :-/O

tautech:

--- Quote from: mnementh on July 08, 2022, 11:50:48 pm ---
--- Quote from: tautech on July 08, 2022, 08:50:57 pm ---TBH if you can be bothered to cobble something together use the oz2cpu/Defpom method.
Why, because of mwyatt's contribution simulating my measurements to come up with the values of the passives in the networks of the OEM probe.
These things OEM whom as yet I've not found who makes them are damn expensive but don't forget a 20 lot of decent  quality grabbers alone will set you back a C note !

Or if you not in a hurry, keep an eye out for one that looks identical but made for LeCroy, Tek or Rigol and a little sleuthing on each of their websites will get you the Pt. # to look for.......then post them in the DIY thread for the benefit of others.  ;)

I'm 100% they all have the same OEM and the twin thin silicone 8 way ribbon coax (that's a mouthful ! ) is a thing of beauty and near impossible to emulate unless you got mates in the company where it's made to get offcuts !
That's why Defpom went the route he did so to get something nice for his efforts rather than some cobbled together twisted pair mess.

Last year Siglent were specialing SPL2016 + MSO/LA and AWG/FG licensing with a new SDS2000X Plus for just $ 219 that was one hell of a deal compared to shelling out retail for each.
--- End quote ---

Actually, I was thinking to make a header so I could plug the HP pod and whip leads directly into the oz2cpu scope PCB. As I said, those will probably be more than long enough for anything I'd be doing, unless I change my mind and put the scope up higher on my bench, which is pretty unlikely ATM.

I was asking about MK's project since you linked to it at the beginning of the SDS2000X thread. :-// Not knowing what the difference is between the Siglent frontend and the HP braided cables, I'm leery of just plugging random lengths of either braided cable or micro-coax into the front of the scope without any compensation, or the wrong compensation. I saw the issues oz2cpu was having there in the beginning.

mnem
 :-/O

--- End quote ---
OK so if you already have the HP pod den go widdat !
Be aware you only need get something 1/2 clean into the LA input terminals as what's shown on the display in Digital mode bares little resemblance to the actual signal. IIRC there's discussion about this in the DIY thread.
IMO coax LA probe set compensation is likely to be pretty much an industry standard however the truth of the matter is suck it and see.
But the fact that we don't see cries that 'it don't work properly' for any of these DIY creations which points to them being fairly forgiving.

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod