As someone waiting for the 1000Z to be back in stock, who finds the 1052 terribly noisy, it bothers me to hear the fan is loud. What size fan is inside and is it plausable that I will be able to mount a bigger and/or better fan inside?
I would be surprised if you don't like the 1000Z a bunch. Overall, Rigol did a great job.
As someone waiting for the 1000Z to be back in stock, who finds the 1052 terribly noisy, it bothers me to hear the fan is loud. What size fan is inside and is it plausable that I will be able to mount a bigger and/or better fan inside?
You can listen to it in the video I posted, though that's probably not much help. It's louder than any other piece of electronics I own - any of my computers, DVR, cable TV box, etc. I'd expected the 1074Z to be similarly quiet to those, so I was disappointed by that. But on an absolute scale I wouldn't say it's "loud", just more like "noticeable". It's like the noise level of a typical mid-tower PC from 5-10 years ago.
As someone waiting for the 1000Z to be back in stock, who finds the 1052 terribly noisy, it bothers me to hear the fan is loud. What size fan is inside and is it plausable that I will be able to mount a bigger and/or better fan inside?
You can listen to it in the video I posted, though that's probably not much help. It's louder than any other piece of electronics I own - any of my computers, DVR, cable TV box, etc. I'd expected the 1074Z to be similarly quiet to those, so I was disappointed by that. But on an absolute scale I wouldn't say it's "loud", just more like "noticeable". It's like the noise level of a typical mid-tower PC from 5-10 years ago.
Alrighty. Sorry for the long delay, and no, I was too lazy to do the serial video, so I did one highlighting the Anti Aliasing and waveform capture rate, with some random commentary thrown in.
Alrighty. Sorry for the long delay, and no, I was too lazy to do the serial video, so I did one highlighting the Anti Aliasing and waveform capture rate, with some random commentary thrown in.
When you're measuring your waveform update rate and change the memory depth to 12M, the rate drops to ~41 waveforms a second and you say, 'God! It's terrible'.
At that moment, the Rigol is sampling at 500MSa/s - so 2ns per sample. In order to fill 12M of memory, it takes 24 milliseconds. What is the maximum number of times in a second any sampling device in the world could capture 24ms of time?
1 / .024 = 41.666.
So in fact, it's not terrible at all - it's almost perfect given the memory size.
At that moment, the Rigol is sampling at 500MSa/s - so 2ns per sample. In order to fill 12M of memory, it takes 24 milliseconds. What is the maximum number of times in a second any sampling device in the world could capture 24ms of time?
1 / .024 = 41.666.
So in fact, it's not terrible at all - it's almost perfect given the memory size.
I've always thought there needs to be a change in the way they do this. The problem is that they sample at the chosen rate, filling the memory buffer (takes 24ms) then when they are finished they update the screen (can be done approx. 40 per second)
They just need to sample continuously into the 24M sample buffer;
5 (standard), or 6 (widescreen) horizontal divisions on either side of the center line (10 or 12 total divisions) at 5ns/div means only 50ns or 60ns of time sampled data needs to be taken from the sample buffer and displayed; you could theoretically update that much data 20 million times per second (not realistic, I know, because you can't draw it that fast)... but you could guarantee at least 100,000 waveform updates per second this way.
Maybe that's how the big guys get the huge waveform updates per second. it just seems like it should be the only way it is done (or least, the default way)
When you're measuring your waveform update rate and change the memory depth to 12M, the rate drops to ~41 waveforms a second and you say, 'God! It's terrible'.
At that moment, the Rigol is sampling at 500MSa/s - so 2ns per sample. In order to fill 12M of memory, it takes 24 milliseconds. What is the maximum number of times in a second any sampling device in the world could capture 24ms of time?
1 / .024 = 41.666.
So in fact, it's not terrible at all - it's almost perfect given the memory size.
Considering this it seems that 'dead' time (the time data is dropped), would be a more useful measure than wfm.
The bottom line is that I'd like to know what the chances are I'm going to see a randomly occurring glitch on the screen. WFM figures are nice for marketing material; but seem clumsy when it is fully specified for all possible settings, and pretty close to useless if it is not fully specified.
IMHO they wouldn't have to fill the memory first and then display. In my unfinished USB scope design I split the data stream from the ADCs into one which went to the display and re-triggered as soon as the display is full (nearly killing any dead time) and one stream which went to the memory. During acquisition it would show min/max of many acquisitions (didn't got to intensity grading) and in offline mode it would allow browsing through the memory (up to several Gpts of data).
You are thinking too much in black and white. Realtime mode and browsing through data are two different ways of looking at a signal. Treat them as such. In realtime mode you want to show as much of the signal as possible so show as much data as possible (synchronised by the trigger) either by showing min/max (peak detect) or persistance (intensity grading). In offline mode (scope stopped) you want to browse through the data. In that mode you don't want intensity grading, just the samples and/or peak-detect.
I just received my DS1074Z today. I won't have much chance to play with it until after Christmas, but I unboxed it, powered it up, calibrated all 4 probes at 10x, and then poked through the menus and probed a signal or two.
First impression.. it's a solid piece of gear.. even more weight to it than I expected. I was using it in my kitchen initially, then moved it down to the garage workbench. In neither place did the fan make enough noise for me to even notice. Now, this IS my first scope so I have nothing to compare it to, but it was impressively quiet for my expectations.
The display is gorgeous. I'm sure the gradient display on the DS2000 series is better, but I think Rigol did a hell of a nice job with the 64-level gradient or whatever this model supports. So much bang for the buck, especially for a hobbyist like myself. I can't wait to probe some more interesting signals with this device. I think I'll try my hand at a basic function generator so I can visualize some stuff.. I have a schematic for one based on a quad op-amp IC, 4 diodes, 2 caps, and some resistors.
IMHO Rigol made a real killer with the DS1000Z series. I was looking for a used 100MHz TDS3000 series scope to have a portable scope but the DS1000Z appears to be better in so many ways that buying an 'old' TDS3000 seems like a waste of money. I think we may see prices for second hand scopes drop really fast.
@marmad: forget about the LCD refreshrate. Its not relevant. If the software updates the screen 5 times per second its more than enough.