Author Topic: 20 channel, 100GHz real time oscilloscope (this is not a joke)  (Read 3718 times)

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Offline jeremy

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20 channel, 100GHz real time oscilloscope (this is not a joke)
« on: November 03, 2014, 09:44:13 pm »
better start saving your pocket money: http://teledynelecroy.com/100ghz/
 

Offline TriodeTiger

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Re: 20 channel, 100GHz real time oscilloscope (this is not a joke)
« Reply #1 on: November 03, 2014, 09:58:33 pm »
Heard about this before on the Amp Hour, or maybe it was something similar like a rack mount thing meant for military use only pretty much. This one looks like quite a compact package though!
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Offline Marco

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Re: 20 channel, 100GHz real time oscilloscope (this is not a joke)
« Reply #2 on: November 03, 2014, 09:59:42 pm »
20 channels by re-using a single control module ... but with a stack of capture modules.

Sell a scope for millions, can't pay someone to proofread the datasheet :

Quote
<130s channel-to-channel
jitter. Such precision is not possible
with conventional methods of
synchronizing two independent
oscilloscopes with a 10 MHz clock is
key for applications requiring closely
matched channels, such as optical
modulation analysis.
 

Offline nctnico

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Re: 20 channel, 100GHz real time oscilloscope (this is not a joke)
« Reply #3 on: November 03, 2014, 10:06:38 pm »
IIRC Free-electron posted some pictures of this oscilloscope earlier. Perhaps he even spotted it in the wild.
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline German_EE

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Re: 20 channel, 100GHz real time oscilloscope (this is not a joke)
« Reply #4 on: November 03, 2014, 10:14:19 pm »
It has been reported elsewhere that scientists have now made an amplifier that can give 11dB gain at 1 THz, Teledyne LeCroy have some catching up to do.
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Offline jeremy

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Re: 20 channel, 100GHz real time oscilloscope (this is not a joke)
« Reply #5 on: November 03, 2014, 10:39:46 pm »
IIRC Free-electron posted some pictures of this oscilloscope earlier. Perhaps he even spotted it in the wild.

This was announced on the 29th, was it after then?
 

Offline nctnico

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Re: 20 channel, 100GHz real time oscilloscope (this is not a joke)
« Reply #6 on: November 04, 2014, 12:11:51 am »
Before but perhaps Lecroy beefed up an existing model.
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline daqq

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Re: 20 channel, 100GHz real time oscilloscope (this is not a joke)
« Reply #7 on: November 04, 2014, 09:13:41 am »
Wow... what kind of ADCs go into a thing like that? I'd love to see a teardown. Or atleast a price tag.
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Offline DanielS

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Re: 20 channel, 100GHz real time oscilloscope (this is not a joke)
« Reply #8 on: November 04, 2014, 02:47:00 pm »
Wow... what kind of ADCs go into a thing like that? I'd love to see a teardown. Or atleast a price tag.
The only way to sample a 100GHz signal is to interleave a bunch of slower ADCs. How fast those ADCs are simply changes how many sample-and-hold buffers will be required.

The real question should be: what sort of sample-and-hold circuitry goes into a thing like that? That's the really tricky part.

As for the price tag, Lecroy's 60GHz scope starts around 500k$ so I would expect a 100GHz equivalent to be in the 750-1000k$ range.
 

Offline Lukas

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Re: 20 channel, 100GHz real time oscilloscope (this is not a joke)
« Reply #9 on: November 04, 2014, 06:50:49 pm »
Wow... what kind of ADCs go into a thing like that? I'd love to see a teardown. Or atleast a price tag.
The only way to sample a 100GHz signal is to interleave a bunch of slower ADCs. How fast those ADCs are simply changes how many sample-and-hold buffers will be required.
This only gets you to around 30GHz of bandwidth. All scopes with much higher bandwidth use frequency interleaving. The 30...60GHz band gets downconverted to DC...30GHz and digitized. The low band gets digitized directly. Lecroy calls this technology 'DBI'. I'm wondering whether they somehow managed to to s&h at 50GHz bandwidth or if they employ three paths of downconversion. (DC...33GHz, 33...66GHz, 66GHz...100GHz)
 


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