Author Topic: Video Demo & Experiments with the World's Fastest Oscilloscope! [TheSignalPath]  (Read 16128 times)

0 Members and 1 Guest are viewing this topic.

Offline Lukas

  • Frequent Contributor
  • **
  • Posts: 354
  • Country: de
    • carrotIndustries.net
Update: It is possible that the RealEdge modules do not perform THA functions but rather block down-conversion. In this case, each of the 80GS/s acquisition boards digitizes 32GHz worth of bandwidth and recombining is done in DSP. This is similar to the method LeCroy employs in their scopes.

I have added a note to the video as well.
Sounds reasonable for some reasons:
1. The 32GHz clock fed into the real edge module
2. http://www.tek.com/document/whitepaper/techniques-extending-real-time-oscilloscope-bandwidth They claim that there's a dip in the frequency response at 32GHz ... coincidence!
3. Service manual: "This Service Guide does not describe the RealEdge Technology assembly in any detail, as the technology is Agilent proprietary" Nothing to see here, go away.

It would have been quite challenging for marketing to explain why they're now using frequency interleaving, because they mocked it in http://cp.literature.agilent.com/litweb/pdf/5990-5271EN.pdf
 

Offline Hugoneus

  • Frequent Contributor
  • **
  • Posts: 875
  • Country: us
    • The Signal Path Video Blog
Update: It is possible that the RealEdge modules do not perform THA functions but rather block down-conversion. In this case, each of the 80GS/s acquisition boards digitizes 32GHz worth of bandwidth and recombining is done in DSP. This is similar to the method LeCroy employs in their scopes.

I have added a note to the video as well.
Sounds reasonable for some reasons:
1. The 32GHz clock fed into the real edge module
2. http://www.tek.com/document/whitepaper/techniques-extending-real-time-oscilloscope-bandwidth They claim that there's a dip in the frequency response at 32GHz ... coincidence!
3. Service manual: "This Service Guide does not describe the RealEdge Technology assembly in any detail, as the technology is Agilent proprietary" Nothing to see here, go away.

It would have been quite challenging for marketing to explain why they're now using frequency interleaving, because they mocked it in http://cp.literature.agilent.com/litweb/pdf/5990-5271EN.pdf

Exactly.

The fact that Agilent has always claimed that block-down conversion is a bad idea, I took it for granted that they were not doing it. I had a hard time understanding how they were doing THA for 80GS/s ADCs with a 32GHz clock signal, which of course they are not!

What do you do for a living Lukas?
Shahriar Shahramian
The Signal Path Video Blog
www.TheSignalPath.com
 

Offline marshallh

  • Supporter
  • ****
  • Posts: 1462
  • Country: us
    • retroactive
Verilog tips
BGA soldering intro

11:37 <@ktemkin> c4757p: marshall has transcended communications media
11:37 <@ktemkin> He speaks protocols directly.
 

Offline crisr

  • Contributor
  • Posts: 45
  • Country: br
Hurry up, if you buy one of these until September 30th, Agilent will throw in a free DSOX3034A! How can anyone pass this up?  ;D

http://www.home.agilent.com/agilent/editorial.jspx?cc=US&lc=eng&ckey=2316099&nid=-33202.0&id=2316099
 

Offline c4757p

  • Super Contributor
  • ***
  • Posts: 7805
  • Country: us
  • adieu
Ooh! I'll take six!
No longer active here - try the IRC channel if you just can't be without me :)
 

Offline olsenn

  • Frequent Contributor
  • **
  • Posts: 993
If you overload the input on that scope, somebody is going to kill you :)

I wonder how many of those they sell. I imagine most are rented
 

Offline Hugoneus

  • Frequent Contributor
  • **
  • Posts: 875
  • Country: us
    • The Signal Path Video Blog
If you overload the input on that scope, somebody is going to kill you :)

I wonder how many of those they sell. I imagine most are rented

They have sold quiet a few already.
Shahriar Shahramian
The Signal Path Video Blog
www.TheSignalPath.com
 

Offline c4757p

  • Super Contributor
  • ***
  • Posts: 7805
  • Country: us
  • adieu
If you overload the input on that scope, somebody is going to kill you :)

Any idea how extensive the damage would be? I figure it's not exactly packed to the gills with input protection, that would totally destroy the bandwidth.... but how far would the damage propagate if it took 20V?
No longer active here - try the IRC channel if you just can't be without me :)
 

Offline Hugoneus

  • Frequent Contributor
  • **
  • Posts: 875
  • Country: us
    • The Signal Path Video Blog
If you overload the input on that scope, somebody is going to kill you :)

Any idea how extensive the damage would be? I figure it's not exactly packed to the gills with input protection, that would totally destroy the bandwidth.... but how far would the damage propagate if it took 20V?

It all depends on what vertical setting it is set to. It has a front-end mechanical attenuator, so you could damage the resistors in the 67GHz attenuator if it is set to high attenuation. But if the scope is set to 2mV/Div, then you can directly damage the front-end. If an overload condition is observed the scope quickly jumps to high-attenuation however.
Shahriar Shahramian
The Signal Path Video Blog
www.TheSignalPath.com
 

Offline w2aew

  • Super Contributor
  • ***
  • Posts: 1744
  • Country: us
  • I usTa cuDnt speL enjinere, noW I aR wuN
    • My YouTube Channel
Update: It is possible that the RealEdge modules do not perform THA functions but rather block down-conversion. In this case, each of the 80GS/s acquisition boards digitizes 32GHz worth of bandwidth and recombining is done in DSP. This is similar to the method LeCroy employs in their scopes.

I have added a note to the video as well.
Sounds reasonable for some reasons:
1. The 32GHz clock fed into the real edge module
2. http://www.tek.com/document/whitepaper/techniques-extending-real-time-oscilloscope-bandwidth They claim that there's a dip in the frequency response at 32GHz ... coincidence!
3. Service manual: "This Service Guide does not describe the RealEdge Technology assembly in any detail, as the technology is Agilent proprietary" Nothing to see here, go away.

It would have been quite challenging for marketing to explain why they're now using frequency interleaving, because they mocked it in http://cp.literature.agilent.com/litweb/pdf/5990-5271EN.pdf

Note also in the video that the FFT of the noise floor, before applying the frequency translated PRBS signals, shows peaking around 32GHz, indicating that there may be some DSP boosting going on there to try to flatten out a dip at the point where the bands are split.
YouTube channel: https://www.youtube.com/w2aew
FAE for Tektronix
Technical Coordinator for the ARRL Northern NJ Section
 

Offline Hugoneus

  • Frequent Contributor
  • **
  • Posts: 875
  • Country: us
    • The Signal Path Video Blog
Quote
Note also in the video that the FFT of the noise floor, before applying the frequency translated PRBS signals, shows peaking around 32GHz, indicating that there may be some DSP boosting going on there to try to flatten out a dip at the point where the bands are split.

Yes, I am convinced that you are right about this. Thank you.
Shahriar Shahramian
The Signal Path Video Blog
www.TheSignalPath.com
 

Offline Hugoneus

  • Frequent Contributor
  • **
  • Posts: 875
  • Country: us
    • The Signal Path Video Blog
Hurry up, if you buy one of these until September 30th, Agilent will throw in a free DSOX3034A! How can anyone pass this up?  ;D

http://www.home.agilent.com/agilent/editorial.jspx?cc=US&lc=eng&ckey=2316099&nid=-33202.0&id=2316099

Its funny that you say that, because we bought a bunch of stuff and have a few of these little guys sitting around now. They offer this promotion on a few items.
Shahriar Shahramian
The Signal Path Video Blog
www.TheSignalPath.com
 

Offline crisr

  • Contributor
  • Posts: 45
  • Country: br
Yeah, it seems like you can get a free DSOX3034A by spending as little as US$18,581... equivalent to more than 40% off. It's actually a very good deal assuming you need a Pulse Function Arbitrary Noise Generator.  ;)
 

Offline Psi

  • Super Contributor
  • ***
  • Posts: 7367
  • Country: nz
Is pretty remarkable,

Just imagine in 40 years with graphene transistors or other technology we might all have a cellphones (or eqiv) that can sample/produce up to 100Ghz for some sort of ultra fast software defined radio RX&TX communications.
Greek letter 'Psi' (not Pounds per Square Inch)
 

Offline vaualbus

  • Frequent Contributor
  • **
  • Posts: 296
  • Country: it
As now have the sure to said the real edge do step down conversion or is just a track and hold amplifier?
Some one have some more info on that?
Just to know theorically how much an adc of this machine cost (50k, 60k)?
 

Offline w2aew

  • Super Contributor
  • ***
  • Posts: 1744
  • Country: us
  • I usTa cuDnt speL enjinere, noW I aR wuN
    • My YouTube Channel
As now have the sure to said the real edge do step down conversion or is just a track and hold amplifier?
Some one have some more info on that?
Just to know theorically how much an adc of this machine cost (50k, 60k)?

All evidence points to the use of a block down-conversion scheme.  Agilent's 80GS/s ADC is a large array of S/H+ADCs all running at a lower speed.  If I recall correctly, there are 160 (or more) that are used to make up the 80GS/s base sample rate.
YouTube channel: https://www.youtube.com/w2aew
FAE for Tektronix
Technical Coordinator for the ARRL Northern NJ Section
 

Offline vaualbus

  • Frequent Contributor
  • **
  • Posts: 296
  • Country: it
Shahriar this oscilloscope i no more the more fats production oscilloscope, apparently agilent have released a new series of oscilloscope.
The DSAZ634A apparently tha have better performance thant the other scope.
At first the biggest difference we can see from the agilent picture is that now there isn't no more the seperate connector for high speed signal and not.
Just only the channel connector.
The cost without option is just "only" 453k of dollars!
I wish you know something more on this scope and what is new from the predecessor.
Best regards, Alberto.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf