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Ridiculously small Rigol DS1000z series font size
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markone:

--- Quote from: rich on January 29, 2016, 01:22:36 am ---Is using USB the only option or can the LAN be used and does it give better wfrms/s?

--- End quote ---

I'm almost sure it's not an interface bandwidth problem, the data speed is limited by firmware policy for one (or more) of following reasons :

1) the internal DSO HW resosurces are not designed to
2) the code that manages the USB/LAN interface it's not optimized
3) it's the result of a marketing decision

I would bet on the latter.


--- Quote from: rich on January 29, 2016, 01:22:36 am ---I guess intercepting the LCD connector and remoting it to HDMI/VGA/... for an external monitor is a step to far as a workaround for the font size ?

--- End quote ---

It's a lot far, to say the least ;D
miguelvp:
This doesn't directly apply to the DS1000z per se but on my quest to do a faster screen capture over LAN for my DS2000 scope, using alex.forencich's vxi11

I modified the script for the DS1054z screen capture to use vxi11 and my captures took 2 minutes and 40 seconds.

After modifying the code to keep the MTU at 1514 bytes I can get the capture in just 4 seconds.
More info here:

https://www.eevblog.com/forum/testgear/python-based-instrument-control/msg676772/#msg676772

Not sure if this will apply to the DS1000z series, but maybe.
markone:

--- Quote from: miguelvp on January 29, 2016, 02:05:24 am ---After modifying the code to keep the MTU at 1514 bytes I can get the capture in just 4 seconds.

--- End quote ---

I would never have dared to transfer the whole screen image in raw format for the purpose, but even 4 seconds seems A LOT of time for transfer 1 MB nowadays  :wtf:

So we have a whopping 250KB/s on the LAN interface, that would be still enough for an external live screen on PC monitor if you transfer ONLY waveforms screen dots, plus some scaling parameters, leaving the interpolation math to the personal computer cpu (a joke also for 1Ghz Atom cpu).
rich:


--- Quote from: markone on January 29, 2016, 01:48:40 am ---I'm almost sure it's not an interface bandwidth problem, the data speed is limited by firmware policy for one (or more) of following reasons :

1) the internal DSO HW resosurces are not designed to
2) the code that manages the USB/LAN interface it's not optimized
3) it's the result of a marketing decision

--- End quote ---

I was thinking along the lines of your point 2 that it might have a sensible LAN architecture vs. a pitiful USB-serial arrangement.
miguelvp:
True, still the MTU size will apply to get things speedy with the stack implementation at hand.

Get the programming manual for the Rigol and implement the waveform transfer, actually someone has done that already but as far as I know it was just for the 4000 and the 2000 series, but might work on the 1000 series as well.
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