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The Rigol DS1052E

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flolic:
Yes, but that's NOT what specifications says!

flolic:
Front end, Dave's 1052 vs my 1102

dexters_lab:

--- Quote from: flolic on November 13, 2009, 10:54:47 pm ---Photography is my other hobby so making panoramic images is something I do a lot  ;)

Let's go to PSU board:


Few thoughts about temperatures, fan and fan noise. My plan was to reduce fan speed to lower noise. Before that I take some temperature measurements... I checked temperatures inside the scope with my IR thermometer. Hottest parts on the main board are definitely AD converters, followed by FPGA. They reached around 50 degrees Celsius. Other hot part is that 7905 regulator in the bottom left. But I think fan cooling is not needed for main board, those temperatures are relatively low.
On the other hand, parts of PSU get really hot. Left top (LM317) and left bottom (some diode) heatsinks are at 70C. But that diode right next to the big primary side electrolytic reached 94C!!! Room temperature was 20C.
I aborted the mission and leave fan at full speed  :(

--- End quote ---

i might be tempted to pop a a heatsink on the ADCs, keeping them cool will help with noise, especially as they are overclocked

shame the PSU is being pushed hard. I guess it's easy to replace components if they fail, but annoying if they end up cooking the pcb and surrounding components. Worth remote-mounting a higher rated one?

Also notice a high-volt driver at the top of the board, is that for the LCD backlight? - Am surprised they are not using LED backlight for a screen that size.

i'm still waiting for my 1052 to land in the uk

dexters_lab:

--- Quote from: flolic on November 14, 2009, 09:47:04 pm ---Front end, Dave's 1052 vs my 1102



--- End quote ---

thanks for the side-by-side view frolic, great work there!

they are very similar, but there's differences in the pcb for sure. The 1052 looks like it's using a Cosmo KAQY214S SSR ( http://www.cosmo-ic.com/object/products/KAQY214S.pdf) instead of the mechanical relay of the 1102. Could this limit the bandwidth?

other than the components ralated to the SSR everything else seems the same to me?

GeekGirl:

--- Quote from: dexters_lab on November 16, 2009, 10:20:04 am ---
--- Quote from: flolic on November 14, 2009, 09:47:04 pm ---Front end, Dave's 1052 vs my 1102



--- End quote ---

thanks for the side-by-side view frolic, great work there!

they are very similar, but there's differences in the pcb for sure. The 1052 looks like it's using a Cosmo KAQY214S SSR ( http://www.cosmo-ic.com/object/products/KAQY214S.pdf) instead of the mechanical relay of the 1102. Could this limit the bandwidth?

other than the components ralated to the SSR everything else seems the same to me?

--- End quote ---

The datasheet does not give a frequency bandwidth for this device, but it depends on how it is used in the circuit. If the PCB is a double sided board, could you guys trace out the circuit, should not need to much, although if you could do from the BNC to the ADC we could analyse the circuit fully.

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