Products > Test Equipment
12 bit Keysight... when?
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CosteC:
Keysight 10 bit indeed does not offer anything inferior to R&S 16 bit it tektronix 12 bit but only at end of bandwidth. It is even better than Tektronix. For low frequencies LeCroy or R&S may be better solution without overpaying for not needed bandwidth needed for hi-res modes. Middle of shelf is bit empty for me (say 500 MHz.. 2 GHz)
2N3055:
My opinion is that there won't be 12 bit megazoom 3000G HD scope from Keysight... Maybe never.

 3000T was "redesigned" into 3000G that is exactly same scope. Brand new one, just released year ago..

Keysight now is like Fluke. Fluke 87V is "classic", set in stone in millions specifications, procedures. You don't change it. It sells exactly because it is always the same.
Same is with Keysight 3000T/G.
And same as Fluke, they invest and innovate plenty, just somewhere else. We spoke about it some time ago. Their corporate strategy changed form "manufacturer of premium measurement instruments" into "provider or premium measurement solutions".

They are not interested in "low end". Which by their definition 3000 series is...
So they will (like Fluke) keep legacy designs alive as long as there is market for them (it is minimum investment income) but will not develop new entry level instruments.
It makes no sense. They lost that game long ago..
CosteC:
I think this is very good summary.
I used to use 34970A and it was withdrawn after decades. I had in my hadns HP 34970A, Agilent one and Keysight one.
They introduced DAQ970A. Bit better here and there, basically same cards, our testers require some changes as DAQ970A is bit faster, it is black, and has better screen. Not used anyway in automated systems.

Keysight is for me solution provider indeed. Very reliable, not cheap but it works very well. Somebody else will test if market really needs 12 bits, thier 10 bits is still better than most of competitors, and those who needs accuracy at GHz read datasheets carefully...
miro123:

--- Quote from: Martin72 on December 23, 2023, 05:35:26 pm ---
--- Quote from: PELL on December 23, 2023, 02:15:03 am ---I guess because they have the best 10-bit ADC converter on the market.

The important thing about a scope resolution is the "Effect Number Of Bits" or "ENOB".

Many 12bits scope only has around 6~8bits of ENOB (depending on bandwidth and sample rate), while Keysight can easily reach this number with their 10bit ADC. One of my main guesses they actually design a 12bit ADC, but only say "it is 10bit" when marketing.

Surely one day they will reach 12bit, but I don't think they will announce before they polish enough.

--- End quote ---

The Keysight 10bit converter is not bad - or it is generally hardly "better"...


Edit: Not in the picture: Siglent SDS7000 H12:  7.5bits (3Ghz), 7.3Bits (4Ghz)
Siglent SDS2000X HD: 8.7bits/8.4bits(100/350Mhz)

--- End quote ---
Can you provide http link with screenshot data. I see mixing oF ENOB from manufacture A with Noise floor of B.Manufacture does not make coamprition easy. One define ENOB as linearity + Noisefloor in BW. Another   freq flatness + noise , some other takes the gain error too, another use spectral density/THD/TDD. Other take the the horizontal errors also within the ENOBs.
I want to read what exactly the published numbers means.
As more as I read those screenshots as more confusing it gets - e.g Lecroy RMS noise floor at 1mv/div = 87uV. It is great value close to theoretical Johnson noise of 50ohm @25C . Lets calculate the SNR = 8mV pp /87uV - keep in mind that this is the best case number I divide Vpp to RMS noise SNR >1,1% or 6 bits SNR
Martin72:

--- Quote ---I see mixing oF ENOB from manufacture A with Noise floor of B.
--- End quote ---

Then I would take another closer look.
You can only see the noise floor with the lecroy extractor, and only because the cut-out would otherwise have been too narrow.
Here are the models for you to look at again:
-Tektronix series 4B
-Lecroy HDO6000B
-Keysight Infinium S series
-R&S RTO6 series
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