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DS1054Z voltage differences between channel
Fungus:
--- Quote from: rstofer on March 31, 2016, 09:46:31 pm ---Until I started reading the 1054 megathread from the most recent backwards, I was pretty much sold on the 1054. Cost isn't an issue and I have a Tek 465 for the real fast stuff but I know exactly NOTHING about digital scopes. I have never even seen one! It's fairly obvious Dave is enthusiastic about the 1054 as are most other members of the forum. But now I'm beginning to wonder... Am I chasing 'best scope for the money' down a rathole? It's clear I can't afford the 'best scope regardless of money' but I'm not looking to buy into a bunch of fairly serious limitations simply to save a few hundred bucks.
--- End quote ---
To get something that would satisfy the naysayers you'll have to spend a *lot* more. Three or four times more.
Plus... you won't really get any more features and you might only get two channels.
If you're not in a hurry then wait for the next DS1054Z firmware update (which is due any day now if they stick to their usual schedule). See if the naysayers have any legs left to stand on afterwards.
The "Yaigol" thread is very interesting but does the badly-designed PLL actually affect readings on screen? I don't think anybody's shown it. So... :-//
sandor626:
--- Quote from: Fungus on March 30, 2016, 01:16:39 pm ---Things you can try:
a) Go to Acquire->Mode and set "High res". This gives you a 12-bit ADC. Now adjust the vertical scale/position so that the wave is as tall as possible on screen (think 'pixels' - the more pixels it covers, the more accurate it will be).
b) Turn on the low pass filter to eliminate some noise (press the channel's on/off button and choose "BW Limit->ON")
--- End quote ---
hi Fungus
I don't think it works, it is useless to start with these settings, because the self-calibration procedure establishes by itself what the basic settings are, furthermore I have many doubts that the hi-res setting can transform an 8-bit ADC into a 12bit ADC.
Fungus:
--- Quote from: sandor626 on October 22, 2024, 08:02:56 am ---I have many doubts that the hi-res setting can transform an 8-bit ADC into a 12bit ADC.
--- End quote ---
It doesn't literally turn it into 12 bits, it computes the average of various adjacent samples so the noise cancels out. This gives you more "virtual" bits at the expense of bandwidth.
(...and here comes all the pedants to argue exactly how many, and whether the original even has 8 bits to start with)
sandor626:
no one wants to be pedantic, but on a forum the right thing eventually comes out.
Then the hi-res option does not create a 12-bit ADC.
Furthermore, no selected settings remain during autocalibration.
What I would like to recommend instead is:
filter the mains voltage with a good EMC filter,
turn off all electronic devices in the vicinity, as well as smartphones, always to avoid electromagnetic interference.
By doing this my ds1054z measures 3.00 V on the four inputs
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